Science teachers don't generally get to pick the topics they teach. They are handed down, often from legislatures. Your science teachers probably cared a lot about how much you learned and were more frustrated than you were. (Sorry, I'm a science teacher.)
@@CurtisDensmore1 That may very well be so, but I feel that more knowledge is conveyed to the student if the teacher shows enthusiasm and a love for their subject. (Sorry, I'm an English teacher.) There is so much more to teaching than just attempting to impart knowledge.
Heavy diesel truck starter motors are amazing for a kart, they draw up to 2000 amps at 12vdc and when geared properly they will stay cool, they are designed to crank a 12-16 litre extremely high compression engine so they can be a good fit. As a note about them, the starters go bad often and can be gotten cheap or free, but they only go bad because of the throw out section 95% of the time, so the actual motor is still good if you rework it for this application
they turn about 2400 to 3600 free wheeling. Now controlling them for a long time and cool would be another story. They have a lot of torque. you have to remember that they are still a starter short running times.
Evil Me (and the others) Starter motors seem to be good choices, due to their power. The drawback with them is they are designed for short periods of working, turning the engine for seconds, and then resting for much longer time (they can cool down during the resting). Their bronze or graphite brushes can wear out very quickly if they work continuously (due to the friction and the heat generated while conducting), and overheating seems to be a big issue. But they put out huge torque. I think the heat issue can be solved partially, by modifying the case and cooling them with fans. The friction between the brushes and the rotor also can be lowered, but not too much. This can be the biggest issue with them. With Pulse Width Modulation controllers, their speed and torque can be controlled easily, but it needs huge MOSFETs, a lot. It's very easy to build a controller with NE555 or NE556 ICs, the H-bridge for the motor is simple, but it needs to be designed and built carefully. I say the best choice for the job should be a 3-phase induction motor with a frequency modulation controller, which is the most difficult part of the contraption. The controller can be built at home too with some knowledge, and there are well-designed ones available to buy, newly or used. They are not cheap.
Just a silly question, but wouldn't you use a starter motor and then a regular DC motor? Have the Starter work primarily when starting from stop and then having the regular DC motor kick in once you get to speed?
Sounds like an added level of complexity not to mention weight. But I like the way you think. I have a friend who has a hybrid. Fast as hell. I guess this is the way it works. I think it's strange that the IC motor shuts off at stop signs and then restarts when you start driving. And it's also strange to me that the batteries only charge when the car is driving. There is no way to plug it in. I've looked under the hood, its a complicated very sophisticated piece of machinery.....
Just a random comment here, but I LOVE your videos- I love how you give the reasons, calculations, and technical info BEHIND your comments and decisions- this makes it great practical information that can be reworked to derive info to apply to other applications.. Thank you!
Thanks for this video! I already built a small electric go kart (350W 36V) for my son, and was just starting to do research on building a second, larger kart for myself. This was extremely useful information.
Very informative as well as easily understood. Its people like you that keeps people like me from burning down the house and myself. Keep up the good work
I've been an electrician at a steel mill for 33 years. We work on just about everything you can imagine.... I just want to say I really enjoy your channel. When I'm talking to younger guys that aren't sure what to do with their lives. You're channel is one I'll tell them to check out. You keep it interesting and you show how you can have fun, learn, and do it for as cheap as possible. Well done! 👍🏼
23 years at my mill, till Corp decommissioned the site. It's never the same day twice when supporting a mill with an EAF, Baghouse, Reheat furnace and Rolling Mill (simplified). Cheers
Jeremy, you are a pleasure to listen to. You are very gifted in this. You are a teacher. You give very clear guidance, instruction as should be. This is not common. It takes a person with a heart to care for the students learning number 1. You do. Thank you, John from Noblesville.
The best motor I found was a starter from a Ford Power-Stroke® diesel engine, the one that is "in-line" having a planetary reduction gear setup internally. It has tire "burn out" torque and goes pretty fast when driving the wheel/tire directly. Those are 4KW motors (5+ HP) and aux cooling is required! I used 3/8" thinwall copper tubing to wrap the motor and a water pump and car heater core as a radiator. Use Thermon® T-85 graphite paste when wrapping the motor with the tubing for good heat transfer and aluminum sheeting to finally cover the tubing and motor. Do this and be sure to wear a helmet!
I can learn more about electric motor's from you in 20 minutes than l have learned on my own in my 58 year's, I wish kid's today could all have a teacher like you.
The best explanations so far that I have from utube. As a maintenance technician, without a degree, this has expanded my education x 2. Vital information taught very well. I appreciate these videos
Hi. Love your videos. I read through the comments and no one said this so I'm going to. In my experience with inverters, the lead acid battery can not handle loads above around 800 watts for more than a short duration. I think your inverter may have been working fine, but pulled the voltage below the inverter cutoff safety setting. Then when the voltage came back up in the battery, the inverter started again. You probably needed 3 or 4 batteries in parallel the size of the one you were using to reliably use that inverter at its max rated wattage. 3,000 wats is 250 Amps at 12 volts. Way more than a single car battery can handle.
How does a car battery start a car if it can't handle more than 800watts? And how do you know what kind of battery this is and the amps it can handle, batteries vary greatly. There are little 5ah RC batteries that can put out 6000+ watts
@@pdub422 judging by d size of it, it'll hardly exceed 100Ah. yes, it'll handle even 2000W, but more than 30seconds continously will already be pushing it. and while cranking d V will drop
The single car battery CAN deliver a few hundred amps for a few seconds - which is enough generally to crank a car engine. Use golf cart batteries for more continuous power.
@@KarlsLabReport I tried running my electric chainsaw with a 3000 watt inverter hooked directly to the installed battery on my Ford Ranger with the engine running and the saw started and almost immediately the engine died on the pickup and the saw started running slow then the undervoltage protection on the inverter shut it down. The alternator and the battery combined couldn't keep the tiny electric chainsaw running. A single battery is not able to pack much of an electrical load for more than 5 seconds, but 4 will be able to run a decent load for one to a few hours, but doesn't have enough power to reliably run a washing machine reliably or a standard fridge and freezer reliably. Lithium ion baterys are many times better for any high load (example cordless power tools)
This kind of teach no one does for free. And it should be! People who whants to find knowledge should find it for free. Thankil so Much, im from Brasil, and spend at least half hour per day watching your videos.
My son is a high school senior who wants to become an engineer. For the last serval years He has been watching all of your demos. Thank you for inspiring him and many more of his generation.
One thing you might have forgot to mention.... Inverter would better be a Pure Sine wave to drive inductive load. Also the inverter might have cut out due to excessive battery voltage drop... in which case 2 batteries in patallel might help - making such motor/inverter setup even more impratical. Another alternative is to use a 24 volt inverter and 2 batteries in series.
Very informative! As someone who is new to all the different kinds of motors out there, I appreciate you taking the time to show the reasons why some motors are and are not ideal for different applications.
You can use auxiliary electromagnets on permanent magnet DC motors for field weakening or amplifying for adjusting torque-speed characteristics and current consumption.
Being totally new to this, I do have a new clothes dryer motor which I ended up not needing. After finding lint out of sight jamming the back area of the spindle while trying to remove the motor, I just needed to get it clean. Now still running strong 3 years. No one's vid on youtube suggested anything other than installing a new motor, based on my search for the symptoms, so I bought one. Love what you do, my wife has joined me watching you. Excellent work.
In case anyone is wondering, there's no such thing as an inexpensive 3,000 watt pure sine wave inverter. If you paid $100 for yours, it'll burn up before it gets anywhere near that or the 2nd time it hits that output. Mine cost $1,800. You get what you pay for with electronics.
I liked your video. Great information. I remember something from several years ago about "overspeeding" a brush type DC motor. Once a DC motor like this is up to its full speed, the field winding acts as a speed control through the strong magnetic field it produces. If the current is then reduced to the field, the motor will increase in speed, above its rated speed. Another thing I remember about DC motors used in old Trolley cars (aka street cars) is that the car had only 4 speed positions, and not an infinitely variable speed control. In the first position of the controller, the motor is in a 6 pole and series wound mode where the field and armature windings are wired in series. This gives maximum torque, and a lower speed to start the trolley moving. The next position is 4 field poles and also wired in series. The torque is reduced some, but the speed increases. The third position on the controller engages 6 field coils, but wired so that the field coils and rotor coils are in parallel. This allows for more speed, but again reduces torque, however the trolley has increased speed, so not as much torque is needed. The 4th position engages 4 field coils, and the field and rotor windings are in parallel for maximum speed.
I'm only 3 minutes in and it's already excellent! I like the way you test with the locking pliers, because definitely, that AC motor is going to run into those type of challenges. It is something I have to admit I wouldn't have thought of.
Wow GOD bless you brother. What a gift you have for teaching. I would love to see a couple million subs on your channel. And thank you for sharing your gifts with all of us nuts out here!
Read through bunch of of the comments and every single one was positive. I don't think I've seen a channel that has such praise. I just found your channel today and I've already seen 10+ of your videos. 👍
The alternator is just a 6-pole (3-pole pair) 3-phase motor with an externally DC-excited rotor field wired in a wye configuration. When generating power, the output is controlled by regulating the field strength. To use it as a motor, you need to generate 3 phase AC with, say, the secondary of a VFD or have brushless DC motor controller. Problem is, the alternator is not designed to run full field for a long duty cycle. Of course, the devil and a lot of the cost is in the motor controller.
Ya that hundred or so dollars really hits hard on the pocket book not to mention the 2+ hours of jerking around modifying something to perform the exact opposite of its intended purpose. Not every alternator is a 6-pole, or delta configuration. Problem is , the alternator is designed to run at a specified output with a given demand for the duration of it's rotation. Of course, the devil and a lot of the time wasted is in the work put in.
@@adubs. predator 212 is only 6.5hp, an alternator can easily get over 10hp and being an electric motor would have torque all across the room range, your predator would NOT be anywhere near as fast as an alternator properly setup for about the same price.
Why run it at full field strength? All that does us limit your upper room limit due to back emf. An ideal value I've found, if you don't want to make a controller that will vary the field based on load and rpm, is about 5 volts.
Thank you for your videos. THIS is my kind of channel. Quick easy to understand information. Not the long and drawn out videos where they leave out critical information that makes you google for an hour or until you understand what they did.
I love this guy, he's always thorough in explaining whether or not the idea I'm having is appropriate for the application. I love his kind nature even more, no question is a stupid one. Often as we start putting complex ideas together in our head as we're thinking about all the details and difficult engineering we forget some of the most basic laws that govern. And that's why I go to this guy's videos. He starts off with the question will this work? Which.... I didn't think of, I just jumped in assuming. And he don't make me feel dumb for over looking simple things in my complex ideas. If this guy has kids, I know those kids have the best dad on earth! I would have loved to have this guy as a dad growing up, such a kind nature.
Maybe the meter you're using measures only the active power while the current is tremendous with an inductive load and reached the max output current of the inverter? But 150W with lo load it's way too much for the active power so you must be right.
I just found your channel and I'm instant subscription brother your explanation style is extremely easy to understand. Thank you for your time and the effort you put into making these videos they are very helpful for someone interested in getting into electric motors and how to understand the rating information.
@Gabriel Derada depends on your setup. Need specifics of what you're trying to achieve otherwise a proper answer to such a vague question could fill a small book.
My dad took a motor from a forklift and put it into a Citroen Xantia. It wasn’t fast, only going 30Kmph max but it had some ridiculous pull. It was able to pull a Honda Ascot which had a trailer connected with 2 tonne of paving stones. Basically he was pulling around 3 tonne. It was a beast but it took a while to get to that point. Thanks for explaining the gearing thing. I often wondered that myself. You sir explained so clearly.
Not many folks understand the moment of inertia for the motor shows max inrush current for milliseconds. That peak current presents every time the motor is started. You explained it perfectly. I have used ‘starter motors’ but put heat sink and fan. Cool you have original controls.
Thanks for the info. As a carpenter this is not my domain at all. You made it simple and easy to understand. I don't need to waste money on underpowered motors for my projects. And of course I subscribed... This class is better than the ones at the college.
i picked up a 24v 36amp dc electric pallet jack motor im considering making an electric cart with. salvaged controller, motor, charger. the original set up in the pallet jack two gear but large reduction. i figure less reduction will get more speed, and the motor should be torquey enough with 2 to 4 24v deep cycle marine lead acid marine battery's. if necessary i can add a flywheel clutch to let the motor get to a reasonable speed before engaging the load of moving the vehicle. like a commen gas powered go-cart. any thoughts on this endeavor?
Your motor is about 1hp output. I would recommend 4 golf cart batteries in series, if the size and weight isn't objectionable. They are 6 volts each, and a true deep cycle battery, with thicker plates than the deep cycle marine batteries, so you can discharge them farther without shortening their life. Deep cycle marine type is good, but the plates are a compromise between a starting battery (thin plates) and a true deep cycle battery (thick plates).
@@MultiPleaser - I've seen 6 volt golf cart deep cycle batteries for sale at Costco. Deep cycle is the type used in electric pallet jacks. You should look online also.
Hey Jeremy, I just wanted to say thank you. You have taught and inspired me. With some tips from you, I created an electric go kart for my daughter and we have started our own fun little channel. The whole learning process has been a blast and now we have a kart to race around our neighborhood. All the best, thanks again Jeremy!
I have an electronic motor from a giant conveyer belt. I mounted it on my dirt bike that I converted into a 3 wheeler. My speed controller failed in the freeway. I got my speed up to 65mph and smelled smoke and plastic as the speed controller was melting. My speed kept increasing as I passed cars trying to apply the brakes. They to melted. The next thing I saw was my speedometer still increasing past 88mph. I realized that if I didn't bail now that it would be worse the faster I went. I decided to jump fir my life. As I jumped to the asphalt at 93 miles per hour my shoelace was pulled into the sprocket and it drug me 300 ft over-the-shoulder through a ditch and into a swamp. Highway Patrol found me lying unconscious with two broken legs and the throttle grip still in my hand
I feel for you man. Just spent two weeks in bed recovering from bike accident. I'm building my own ebike as well. Never thought of a kill switch and I'm no electrical genius. So thanx for your story and sorry about your accident but 90mph is awesome for a diy ebike. I always told my kids when learning to drive" that speed is fun for sure and that driving too fast is fine. UNTIL SOMETHING HAPPENS. then it becomes deadly." I'm going for 40 or 50 kph max but man hitting a 100 once would be cool.
First, my compliments to you on providing concise information in a very easy to understand format. Kind of amazed me that those folks converting alternators did not know before hand that the efficiencty would be extremely low. As expected, every video i watched where this conversion was done the result was the same... no good. Now, I hoped that someone knew more than i and had some additional modification that would make it viable. Many years ago i built an electric car for my son. I used 2 heater motors from cars to supply the motor and an old timey hand crank grinder for the gearing. Finished it did almost 3.5 mph and the reason for building was because where we lived the ground was very steep and buying him a store bought electric car for a 3-4 year old we ould not get up and down the steep yard. I somewhere have a picture of him going up hill pulling a wagon with a 14 year old boy inside the wagon. Yes, 2 fan motors had all the power necessary. The idea is that electric dc motors designed for variable speed has (generally speaking) the same horse power from start to finish, where as a gas engine must "build" the power. Horse power and Torque equalize in a gas engine at 5,100 rpm (if i remember correctly). My son loved watching me modify everything from mechanics to electrical to electronics so much he is an actual sheep skin engineer.
I remember seeing a little kid zooming around in a razor. Looked like tons of fun speed and cornering! Awesome thanks for reading my comment! Great channel...
Jeremy ; Great video even tho I'm not much on electronics. I admire guys like you who aren't afraid to get right into it on their own. Keep on trucking.
Great and useful video...I am making a powered yard cart out of a quad frame so this helped me understand that a converted alternator might not be the most practical solution for higher torque at a crawl speed which is all I need.
brilliant, well-done thanks i am slowly getting my dyslexic head round it thanks to clear well-demonstrated videos like yours jeremy fielding, thanks again
Man.. I love this channel. I just finished watching your CNC video (really nice work btw) and completing handful of repairs on a 20 year old Manco go kart which now runs like a top! I may never build an electric go kart, but that was still a super informative and interesting video.
Thank you for doing all the experimenting. I took on a job to get one of those model t's that the shriners used to drive in parades. Someone put a vertical shaft engine in it and they wont work without the blade because the flywheels are wimpy. Anyway I do have a few wheelchair motors and now my delema is solved. You rock!
That's why in a lot of DIY e-bikes or a mid drive conversion kit you leverage the back derailleur and rear cassette to give you speed after you're already going using the existing gears which is relatively easy to do if you have a dual chainring in the front one for the motor and then the other one to run to the back as usual but it works best if you put free wheels on your cranks or somebody actually just came out with that recently Shimano I think which makes it really easy to do a mid Drive kit without having to replace spindle from the bottom bracket or just get used to ghost pedaling LOL 9:34
Ill be honest. Typically i find it rather hard to understand most video tutorials related to anything electrical works. Its just not my strength. But with this video i was able to understand just about all of what this guy is saying! Very well made! Thank you for making this video dummy friendly lol
Thanks, Jeremy. It's not too common to find someone as knowledgeable as yourself who will take the time to explain to us dummies why we can't put a 20# load in a ten# sack.
Absolutely agree on not going ac since it's 1st going to add massive weight with the inverter and not be as effective since it's not easy to control for 2nd option
Additional to the big inverter and need to measure the Volt-Amp reading, you probably must pay attention to the 12 V battery capacity. The cold crank numbers are some sort of guidance, but they are intended for only short term. A GoKart may need high torque much longer than the battery rating seemed to suggest.
![Seungmin "그렇게, 천천히, 우리(As we are)" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/kAzmhLHePqU/mqdefault.jpg)
The PRACTICAL Science teacher I never had... There's an entire generation out there hungry for knowledge... Keep teaching them sir
And people are hungry for what satisfies their souls, that is Jesus Christ. We all need Him; engineers, electricians and every human being.
Science teachers don't generally get to pick the topics they teach. They are handed down, often from legislatures. Your science teachers probably cared a lot about how much you learned and were more frustrated than you were. (Sorry, I'm a science teacher.)
@@CurtisDensmore1 That may very well be so, but I feel that more knowledge is conveyed to the student if the teacher shows enthusiasm and a love for their subject. (Sorry, I'm an English teacher.) There is so much more to teaching than just attempting to impart knowledge.
I
@@laenga6044 yeah... No. Science says no.
Heavy diesel truck starter motors are amazing for a kart, they draw up to 2000 amps at 12vdc and when geared properly they will stay cool, they are designed to crank a 12-16 litre extremely high compression engine so they can be a good fit. As a note about them, the starters go bad often and can be gotten cheap or free, but they only go bad because of the throw out section 95% of the time, so the actual motor is still good if you rework it for this application
Thanks evil me
they turn about 2400 to 3600 free wheeling. Now controlling them for a long time and cool would be another story. They have a lot of torque. you have to remember that they are still a starter short running times.
Evil Me (and the others)
Starter motors seem to be good choices, due to their power. The drawback with them is they are designed for short periods of working, turning the engine for seconds, and then resting for much longer time (they can cool down during the resting).
Their bronze or graphite brushes can wear out very quickly if they work continuously (due to the friction and the heat generated while conducting), and overheating seems to be a big issue. But they put out huge torque.
I think the heat issue can be solved partially, by modifying the case and cooling them with fans.
The friction between the brushes and the rotor also can be lowered, but not too much. This can be the biggest issue with them.
With Pulse Width Modulation controllers, their speed and torque can be controlled easily, but it needs huge MOSFETs, a lot. It's very easy to build a controller with NE555 or NE556 ICs, the H-bridge for the motor is simple, but it needs to be designed and built carefully.
I say the best choice for the job should be a 3-phase induction motor with a frequency modulation controller, which is the most difficult part of the contraption. The controller can be built at home too with some knowledge, and there are well-designed ones available to buy, newly or used. They are not cheap.
Just a silly question, but wouldn't you use a starter motor and then a regular DC motor? Have the Starter work primarily when starting from stop and then having the regular DC motor kick in once you get to speed?
Sounds like an added level of complexity not to mention weight. But I like the way you think. I have a friend who has a hybrid. Fast as hell. I guess this is the way it works. I think it's strange that the IC motor shuts off at stop signs and then restarts when you start driving. And it's also strange to me that the batteries only charge when the car is driving. There is no way to plug it in. I've looked under the hood, its a complicated very sophisticated piece of machinery.....
Just a random comment here, but I LOVE your videos- I love how you give the reasons, calculations, and technical info BEHIND your comments and decisions- this makes it great practical information that can be reworked to derive info to apply to other applications.. Thank you!
Thanks for this video! I already built a small electric go kart (350W 36V) for my son, and was just starting to do research on building a second, larger kart for myself. This was extremely useful information.
You did a great job explaining things. This come from someone that spent 14 years R&D for trolling motors. keep up the good work.
Very informative as well as easily understood. Its people like you that keeps people like me from burning down the house and myself. Keep up the good work
I've been an electrician at a steel mill for 33 years. We work on just about everything you can imagine.... I just want to say I really enjoy your channel. When I'm talking to younger guys that aren't sure what to do with their lives. You're channel is one I'll tell them to check out. You keep it interesting and you show how you can have fun, learn, and do it for as cheap as possible. Well done! 👍🏼
Ty kindness prevails
23 years at my mill, till Corp decommissioned the site. It's never the same day twice when supporting a mill with an EAF, Baghouse, Reheat furnace and Rolling Mill (simplified). Cheers
This was a good, pragmatic, rational explanation about choosing an electric motor with the constraint of usability.
Very comprehensive Jeremy you answered a few questions that I didn't know
thankyou muchly
Jeremy, you are a pleasure to listen to. You are very gifted in this. You are a teacher. You give very clear guidance, instruction as should be. This is not common. It takes a person with a heart to care for the students learning number 1. You do. Thank you, John from Noblesville.
The best motor I found was a starter from a Ford Power-Stroke® diesel engine, the one that is "in-line" having a planetary reduction gear setup internally. It has tire "burn out" torque and goes pretty fast when driving the wheel/tire directly. Those are 4KW motors (5+ HP) and aux cooling is required! I used 3/8" thinwall copper tubing to wrap the motor and a water pump and car heater core as a radiator. Use Thermon® T-85 graphite paste when wrapping the motor with the tubing for good heat transfer and aluminum sheeting to finally cover the tubing and motor. Do this and be sure to wear a helmet!
Great tips
I can learn more about electric motor's from you in 20 minutes than l have learned on my own in my 58 year's, I wish kid's today could all have a teacher like you.
Please read the description! There are technical corrections including comments on the use of Brushless DC or three phase AC motors there.
Jeremy Fielding , I have a 100 volt dc treadmill motor sitting in my shed that I want to use for a project like this...
I'm glad you saved me some time. I won't be using it
My job here is done 👍🏽
Jeremy Fielding can you use a light dimmer switch for the speed controller for the AC washing machine motor?
I made a whole video on that. Search my channel for dimmer switch
The best explanations so far that I have from utube. As a maintenance technician, without a degree, this has expanded my education x 2.
Vital information taught very well. I appreciate these videos
Kerageous 1 what do you do maintenance on?
Another industrial maintenance technician watching your videos! Steel industry
I like how you answered questions that would never cross my mind. Respect.
For a variable speed controller up to 40 volts I use a cordless drill trigger and it hasn't failed me yet. Food for thought. Great videos
Ty for sharing
Hi. Love your videos. I read through the comments and no one said this so I'm going to. In my experience with inverters, the lead acid battery can not handle loads above around 800 watts for more than a short duration. I think your inverter may have been working fine, but pulled the voltage below the inverter cutoff safety setting. Then when the voltage came back up in the battery, the inverter started again. You probably needed 3 or 4 batteries in parallel the size of the one you were using to reliably use that inverter at its max rated wattage. 3,000 wats is 250 Amps at 12 volts. Way more than a single car battery can handle.
How does a car battery start a car if it can't handle more than 800watts? And how do you know what kind of battery this is and the amps it can handle, batteries vary greatly. There are little 5ah RC batteries that can put out 6000+ watts
@@pdub422 judging by d size of it, it'll hardly exceed 100Ah. yes, it'll handle even 2000W, but more than 30seconds continously will already be pushing it. and while cranking d V will drop
The single car battery CAN deliver a few hundred amps for a few seconds - which is enough generally to crank a car engine. Use golf cart batteries for more continuous power.
@@KarlsLabReport I tried running my electric chainsaw with a 3000 watt inverter hooked directly to the installed battery on my Ford Ranger with the engine running and the saw started and almost immediately the engine died on the pickup and the saw started running slow then the undervoltage protection on the inverter shut it down. The alternator and the battery combined couldn't keep the tiny electric chainsaw running. A single battery is not able to pack much of an electrical load for more than 5 seconds, but 4 will be able to run a decent load for one to a few hours, but doesn't have enough power to reliably run a washing machine reliably or a standard fridge and freezer reliably. Lithium ion baterys are many times better for any high load (example cordless power tools)
You are far and away more helpful than anything I have found. The forums are full of toxic, condescending individuals. Thank you so much.
You're one of the greats, Jeremy. I love what you do.
I can listen to your knowledgeable mind through your voice forever .
You ruined my plans on runing my washing machine go cart with an extension cord.
Lol! A solar sail maybe!
put it on a tether and do donuts...🤓
Bungee cords and a generator in the passenger seat
@@axlegrind4212 AHHHHHHHHHHHHHH
Use a cordless cord..
This kind of teach no one does for free. And it should be! People who whants to find knowledge should find it for free. Thankil so Much, im from Brasil, and spend at least half hour per day watching your videos.
Holy crap. I've been waiting for this. My inner child just let loose and ran around the room from excitement!!!!
My son is a high school senior who wants to become an engineer. For the last serval years He has been watching all of your demos. Thank you for inspiring him and many more of his generation.
One thing you might have forgot to mention.... Inverter would better be a Pure Sine wave to drive inductive load. Also the inverter might have cut out due to excessive battery voltage drop... in which case 2 batteries in patallel might help - making such motor/inverter setup even more impratical. Another alternative is to use a 24 volt inverter and 2 batteries in series.
Very informative! As someone who is new to all the different kinds of motors out there, I appreciate you taking the time to show the reasons why some motors are and are not ideal for different applications.
You can use auxiliary electromagnets on permanent magnet DC motors for field weakening or amplifying for adjusting torque-speed characteristics and current consumption.
Being totally new to this, I do have a new clothes dryer motor which I ended up not needing. After finding lint out of sight jamming the back area of the spindle while trying to remove the motor, I just needed to get it clean. Now still running strong 3 years. No one's vid on youtube suggested anything other than installing a new motor, based on my search for the symptoms, so I bought one. Love what you do, my wife has joined me watching you. Excellent work.
In case anyone is wondering, there's no such thing as an inexpensive 3,000 watt pure sine wave inverter. If you paid $100 for yours, it'll burn up before it gets anywhere near that or the 2nd time it hits that output. Mine cost $1,800. You get what you pay for with electronics.
My 4000W magnum is about $2200
Nice. Very educated man. Love when I get to watch someone who can teach me. Thank you.
I hope you consider a career as a teacher: feels like you'd be fantastic!
500 000 vs 30 students
@@AllanLaal exactly
He'd be the Bruce yeany of engineering
I liked your video. Great information. I remember something from several years ago about "overspeeding" a brush type DC motor. Once a DC motor like this is up to its full speed, the field winding acts as a speed control through the strong magnetic field it produces. If the current is then reduced to the field, the motor will increase in speed, above its rated speed. Another thing I remember about DC motors used in old Trolley cars (aka street cars) is that the car had only 4 speed positions, and not an infinitely variable speed control. In the first position of the controller, the motor is in a 6 pole and series wound mode where the field and armature windings are wired in series. This gives maximum torque, and a lower speed to start the trolley moving. The next position is 4 field poles and also wired in series. The torque is reduced some, but the speed increases. The third position on the controller engages 6 field coils, but wired so that the field coils and rotor coils are in parallel. This allows for more speed, but again reduces torque, however the trolley has increased speed, so not as much torque is needed. The 4th position engages 4 field coils, and the field and rotor windings are in parallel for maximum speed.
Lol. That extension cord is such a pain on my commute. Always have to come home the same way
Get a longer cord silly
@Explodingtraps it don't matter how long the cord is. he'll still have to come back the same way
I'm only 3 minutes in and it's already excellent! I like the way you test with the locking pliers, because definitely, that AC motor is going to run into those type of challenges. It is something I have to admit I wouldn't have thought of.
You're an absolutely amazing teacher!
Wow GOD bless you brother. What a gift you have for teaching. I would love to see a couple million subs on your channel. And thank you for sharing your gifts with all of us nuts out here!
This was great, thank you! Very clearly presented; I'm thinking this could make for an interesting project!
Read through bunch of of the comments and every single one was positive. I don't think I've seen a channel that has such praise.
I just found your channel today and I've already seen 10+ of your videos. 👍
The alternator is just a 6-pole (3-pole pair) 3-phase motor with an externally DC-excited rotor field wired in a wye configuration. When generating power, the output is controlled by regulating the field strength.
To use it as a motor, you need to generate 3 phase AC with, say, the secondary of a VFD or have brushless DC motor controller. Problem is, the alternator is not designed to run full field for a long duty cycle.
Of course, the devil and a lot of the cost is in the motor controller.
well said.
Ya that hundred or so dollars really hits hard on the pocket book not to mention the 2+ hours of jerking around modifying something to perform the exact opposite of its intended purpose.
Not every alternator is a 6-pole, or delta configuration. Problem is , the alternator is designed to run at a specified output with a given demand for the duration of it's rotation.
Of course, the devil and a lot of the time wasted is in the work put in.
Even at a "hundred or so dollars" you could just get a predator 212 and easily go twice as fast. It doesnt make any sense other than experimentation.
@@adubs. predator 212 is only 6.5hp, an alternator can easily get over 10hp and being an electric motor would have torque all across the room range, your predator would NOT be anywhere near as fast as an alternator properly setup for about the same price.
Why run it at full field strength? All that does us limit your upper room limit due to back emf. An ideal value I've found, if you don't want to make a controller that will vary the field based on load and rpm, is about 5 volts.
As a retired teacher of Ind. Arts/Vocational, You have done an excellent job, of explaining LOTS of bases.
Everyone: Go Kart
Me: Ultralight aircraft
That's where I'm at
Thank you for your videos. THIS is my kind of channel. Quick easy to understand information. Not the long and drawn out videos where they leave out critical information that makes you google for an hour or until you understand what they did.
Thanks, Jeremy. This was very informative.
I love this guy, he's always thorough in explaining whether or not the idea I'm having is appropriate for the application. I love his kind nature even more, no question is a stupid one. Often as we start putting complex ideas together in our head as we're thinking about all the details and difficult engineering we forget some of the most basic laws that govern. And that's why I go to this guy's videos. He starts off with the question will this work? Which.... I didn't think of, I just jumped in assuming. And he don't make me feel dumb for over looking simple things in my complex ideas. If this guy has kids, I know those kids have the best dad on earth! I would have loved to have this guy as a dad growing up, such a kind nature.
Maybe the meter you're using measures only the active power while the current is tremendous with an inductive load and reached the max output current of the inverter? But 150W with lo load it's way too much for the active power so you must be right.
I saw that on an rv air conditioner starter kit. They had to have a faster meter. My 2kw inverter needs 2awg short wires to make max output.
I just found your channel and I'm instant subscription brother your explanation style is extremely easy to understand. Thank you for your time and the effort you put into making these videos they are very helpful for someone interested in getting into electric motors and how to understand the rating information.
The motor from a rechargeable electric lawnmower is a good choice. They're usually 3-4 HP, 24 volt.
@Gabriel Derada depends on your setup. Need specifics of what you're trying to achieve otherwise a proper answer to such a vague question could fill a small book.
My dad took a motor from a forklift and put it into a Citroen Xantia. It wasn’t fast, only going 30Kmph max but it had some ridiculous pull. It was able to pull a Honda Ascot which had a trailer connected with 2 tonne of paving stones. Basically he was pulling around 3 tonne. It was a beast but it took a while to get to that point.
Thanks for explaining the gearing thing. I often wondered that myself. You sir explained so clearly.
hahaa a great vid JF! keep em rollin my friend .. God Bless : )
You are by far the best one out there making content like this!!! Absolutely amazing job! # dream job
Am I the only one sketched out by that aluminum bodied alternator chilling tightly between those terminals on the battery around 1min in?
do you mean inverter?
Not many folks understand the moment of inertia for the motor shows max inrush current for milliseconds. That peak current presents every time the motor is started. You explained it perfectly. I have used ‘starter motors’ but put heat sink and fan. Cool you have original controls.
Will the colour change involve "Fielding Blue" {Tm} ?????
Blue sounds like a good choice thank you 😀
Thanks for the info. As a carpenter this is not my domain at all. You made it simple and easy to understand. I don't need to waste money on underpowered motors for my projects. And of course I subscribed... This class is better than the ones at the college.
i picked up a 24v 36amp dc electric pallet jack motor im considering making an electric cart with. salvaged controller, motor, charger. the original set up in the pallet jack two gear but large reduction. i figure less reduction will get more speed, and the motor should be torquey enough with 2 to 4 24v deep cycle marine lead acid marine battery's. if necessary i can add a flywheel clutch to let the motor get to a reasonable speed before engaging the load of moving the vehicle. like a commen gas powered go-cart. any thoughts on this endeavor?
Your motor is about 1hp output. I would recommend 4 golf cart batteries in series, if the size and weight isn't objectionable. They are 6 volts each, and a true deep cycle battery, with thicker plates than the deep cycle marine batteries, so you can discharge them farther without shortening their life. Deep cycle marine type is good, but the plates are a compromise between a starting battery (thin plates) and a true deep cycle battery (thick plates).
@@solarfluxman8810 Who sells true deep cycle batteries?
I was also going to say that's about 1 hp, after subtracting losses.
@@MultiPleaser - I've seen 6 volt golf cart deep cycle batteries for sale at Costco. Deep cycle is the type used in electric pallet jacks. You should look online also.
Hey Jeremy, I just wanted to say thank you. You have taught and inspired me. With some tips from you, I created an electric go kart for my daughter and we have started our own fun little channel. The whole learning process has been a blast and now we have a kart to race around our neighborhood. All the best, thanks again Jeremy!
Possible patreon availability
I have an electronic motor from a giant conveyer belt. I mounted it on my dirt bike that I converted into a 3 wheeler. My speed controller failed in the freeway. I got my speed up to 65mph and smelled smoke and plastic as the speed controller was melting. My speed kept increasing as I passed cars trying to apply the brakes. They to melted. The next thing I saw was my speedometer still increasing past 88mph. I realized that if I didn't bail now that it would be worse the faster I went. I decided to jump fir my life. As I jumped to the asphalt at 93 miles per hour my shoelace was pulled into the sprocket and it drug me 300 ft over-the-shoulder through a ditch and into a swamp. Highway Patrol found me lying unconscious with two broken legs and the throttle grip still in my hand
I feel for you man. Just spent two weeks in bed recovering from bike accident. I'm building my own ebike as well. Never thought of a kill switch and I'm no electrical genius. So thanx for your story and sorry about your accident but 90mph is awesome for a diy ebike. I always told my kids when learning to drive" that speed is fun for sure and that driving too fast is fine. UNTIL SOMETHING HAPPENS. then it becomes deadly." I'm going for 40 or 50 kph max but man hitting a 100 once would be cool.
Wow that is horrible!!
When you said that you reached 88mph, I was expecting you to say that you'd gone back in time 😂
Cool story, bro.
Such a lie
We must protect this man at all costs
I'm thinking treadmill motor on skateboard
Please stop thinking
The only way I’d try it would be wearing an inflatable bubble boy suit and a nascar helmet!...lol
When I do my projects I'm not the one testing so I'm good
@@michaeld954 until you get charged with atempted murder lmao
Take this for what you will, this is one of the most exciting videos I've seen in years
First, my compliments to you on providing concise information in a very easy to understand format. Kind of amazed me that those folks converting alternators did not know before hand that the efficiencty would be extremely low. As expected, every video i watched where this conversion was done the result was the same... no good. Now, I hoped that someone knew more than i and had some additional modification that would make it viable. Many years ago i built an electric car for my son. I used 2 heater motors from cars to supply the motor and an old timey hand crank grinder for the gearing. Finished it did almost 3.5 mph and the reason for building was because where we lived the ground was very steep and buying him a store bought electric car for a 3-4 year old we ould not get up and down the steep yard. I somewhere have a picture of him going up hill pulling a wagon with a 14 year old boy inside the wagon. Yes, 2 fan motors had all the power necessary. The idea is that electric dc motors designed for variable speed has (generally speaking) the same horse power from start to finish, where as a gas engine must "build" the power. Horse power and Torque equalize in a gas engine at 5,100 rpm (if i remember correctly). My son loved watching me modify everything from mechanics to electrical to electronics so much he is an actual sheep skin engineer.
Thank you : this lecture was more down to earth without fast paced too technical jargon .
I remember seeing a little kid zooming around in a razor.
Looked like tons of fun speed and cornering! Awesome thanks for reading my comment! Great channel...
Great video you answered so many of my questions saved me a bunch of money and time doing it trial and error thanks Dale
i once ran a little mobility scooter on 72 volts for a couple minutes. no speed control, just a giant old knife switch. pretty thrilling ride! :)
Jeremy ; Great video even tho I'm not much on electronics. I admire guys like you who aren't afraid to get right into it on their own. Keep on trucking.
Excellent analysis while not getting boring. Thanks.
Great and useful video...I am making a powered yard cart out of a quad frame so this helped me understand that a converted alternator might not be the most practical solution for higher torque at a crawl speed which is all I need.
brilliant, well-done thanks i am slowly getting my dyslexic head round it thanks to clear well-demonstrated videos like yours jeremy fielding, thanks again
Excellent educational video for the lay person not understanding how electric motors work.
Man.. I love this channel. I just finished watching your CNC video (really nice work btw) and completing handful of repairs on a 20 year old Manco go kart which now runs like a top! I may never build an electric go kart, but that was still a super informative and interesting video.
Excellent! Clear and in layman terms, giving practical and useful information. Thank you.
Perfectly presented sir, thank you for investing your time in helping others and very skillful in presentation as well!
Videos like these was what made me want to become an engineer when I was a kid. Thank you!!!
Hi I have always wanted to say hi and thank you explaining things in a much more visual way over the years. Calm and cool thank you.
very good explanations man thanks
Your brilliant Jeremy! keep up your cranial exercises!!! THANKS JEREMY!
Great video and mentoring! You answered a lot of questions and help save a lot time experimenting!
Thank you for doing all the experimenting. I took on a job to get one of those model t's that the shriners used to drive in parades. Someone put a vertical shaft engine in it and they wont work without the blade because the flywheels are wimpy. Anyway I do have a few wheelchair motors and now my delema is solved. You rock!
That's why in a lot of DIY e-bikes or a mid drive conversion kit you leverage the back derailleur and rear cassette to give you speed after you're already going using the existing gears which is relatively easy to do if you have a dual chainring in the front one for the motor and then the other one to run to the back as usual but it works best if you put free wheels on your cranks or somebody actually just came out with that recently Shimano I think which makes it really easy to do a mid Drive kit without having to replace spindle from the bottom bracket or just get used to ghost pedaling LOL 9:34
You answered a lot of questions I was wondering and saved me a ton of trial and error, thanks!
Thank you for all your work, experience and information. Awesome!
I totally get everything you explain so you've earned my following!
dude you the best wish I had teachers like you at my school
Ill be honest. Typically i find it rather hard to understand most video tutorials related to anything electrical works. Its just not my strength. But with this video i was able to understand just about all of what this guy is saying! Very well made! Thank you for making this video dummy friendly lol
Very well explained. Great collection of information that is difficult to find for a novice builder. Keep up the good work.
Well done. Excellent communication on electric motors.
Probably the best video teacher I've seen so far and I'm an avid RUclipsr
Thanks, Jeremy. It's not too common to find someone as knowledgeable as yourself who will take the time to explain to us dummies why we can't put a 20# load in a ten# sack.
Absolutely agree on not going ac since it's 1st going to add massive weight with the inverter and not be as effective since it's not easy to control for 2nd option
Very practical information, excellent presentation format.
Can fully resonate with your instruction..Top stuff. Best you tube chanel yet
I think this is my new favorite channel. Keep up the great content.
Awesome and informative video, Jeremy - thank you for taking the time to make it and post it for everyone!
I've been wondering about this lately. Super useful information - subbed. Thanks!
Hello Jeremy,
very easy explanation...now we all know how it should be done....thanks for the input...... and thanks for sharing.
Comprehensive, Just what youtube needs on this subject. Perfect.
Very nice video and clarifying comments in your description. Definitely helpful and educational.
Additional to the big inverter and need to measure the Volt-Amp reading, you probably must pay attention to the 12 V battery capacity. The cold crank numbers are some sort of guidance, but they are intended for only short term. A GoKart may need high torque much longer than the battery rating seemed to suggest.
best electrical engineering motor tutorials.. i subscribed you and now will make my entire class to do