Run caps do help starting somewhat. Also, a start cap cannot be used to run very long. On washer motors, for example, they are removed from the circuit, after achieving a certain RPM, by a centrifugal switch.
The rotor is a Squirrel Cage Rotor. It does not have windings inside. It consists of strays of copper/aluminium blades cut through and shorted. It is not like Armature Rotors which have windings.
Pretty well explained for the most part... The part with the rotating magnetic field is kinda confusing. On single phase power, the magnetic field doesn't rotate, it just changes polarity 100/120 times per second (1 Hz = one cycle of both polarities). Three-phase induction motors have three phases that are all 120 degrees apart, so if you have three coil sets that are 120 degrees apart each connected to one of the phases you can actually have a spinning magnetic field. With a single phase, you don't. And that's why the capacitor is needed. Otherwise, from a standing position, the motor would have no reason to rotate. Once the motor is running, the magnetic field produced by the rotor is automatically slightly phase shifted by the rotation itself. Therefore, the capacitor is mainly needed to provide a pull to a specific direction when the motor is not spinning yet. In reality, it's all a little more complicated than that. And there are all kinds of important differences between different types of motors which aren't obvious at first. But that's the basic explanation.
@@isla2974 In theory yes, if you can spin it fast enough. Without the capacitor there is no "net force" pulling in any specific direction. And if you spin it slowly (compared to mains frequency), it will still essentially just be pulled back and forth in alternating directions. So on average it won't "want" accelerate in any direction. If you can get the motor close enough to it's normal operating speed however, you can get it to "catch" on mains frequency and keep on running, even without a capacitor.
hi i’ve been asking this question around, hope you’d be able to help. a few of my fan copper wires (maybe a couple) are broken, will it still be working or it’s dead now and need to replace a new motor? the fan is not working at the moment, i’m not sure if this is what causing or the capacitor is dead. i’ve cleaned and put some lubricants but it still doesn’t work. thanking you!
My brand-new Caterpillar fan stopped working when i accidently unplugged it while it was running. any idea what causesd that? It was also plugged into my modified sine-way inverter if that matters
I've heard that WD 40 isn't recommended for use in electric motors. 3-IN-ONE makes an oil specifically for electric motors. It comes in a can that looks just like their cans of household oil except they're blue and white instead of black and white.
I've taken many apart. Because they seize up. I clean the shaft and the bearings. I use lithium grease. Because it seems oil doesn't last as long. I am not experienced in the electrical aspects of a motor.
A lot of cool electromagnetic theory and electric motor design info here! I wouldn't recommend 'wd-40' to lubricate the fan's bronze bushings though. Use an electric motor lubricating oil or I use engine oil, synthetic oil, etc. WD-40 is too light and goes away quickly. Thanks!
Can you please explain what is the purpose of the capacitor? You mentioned a variable fuse as well... so if 2 of 3 speed setting works, but the 3rd is broken (taking for granted that no other parts are broken like the button housing), is that a fuse problem or the capacitor? Just need your awesome input if possible before I order new parts as a DIYer... much appreciated! Great video btw!
The cap is used to start the motor by causing a slight forward offset better the two phases that control the magnetic fields... uh so it's playing while I'm typing and he does explain it, he just started explaining it at 5 minutes ish... he was more detailed than I was gonna be. If you need more details than that than the following video will help. It's video 4 of a series on motors but this is where it's explained. ruclips.net/video/2XYdTogWcIA/видео.html
@@abelsr5445 With the exception that in this case the cap varies the speed of the fan as well. You can understand this better if you watch a ceiling fan cap replacement vid.
Thanks dude. Appreciate the video.
Very informative. I really appreciate the way it was explained to the audience
Thanks a lot for your explaination.
Run caps do help starting somewhat. Also, a start cap cannot be used to run very long. On washer motors, for example, they are removed from the circuit, after achieving a certain RPM, by a centrifugal switch.
The rotor is a Squirrel Cage Rotor. It does not have windings inside. It consists of strays of copper/aluminium blades cut through and shorted. It is not like Armature Rotors which have windings.
Pretty well explained for the most part... The part with the rotating magnetic field is kinda confusing.
On single phase power, the magnetic field doesn't rotate, it just changes polarity 100/120 times per second (1 Hz = one cycle of both polarities). Three-phase induction motors have three phases that are all 120 degrees apart, so if you have three coil sets that are 120 degrees apart each connected to one of the phases you can actually have a spinning magnetic field. With a single phase, you don't. And that's why the capacitor is needed. Otherwise, from a standing position, the motor would have no reason to rotate. Once the motor is running, the magnetic field produced by the rotor is automatically slightly phase shifted by the rotation itself. Therefore, the capacitor is mainly needed to provide a pull to a specific direction when the motor is not spinning yet.
In reality, it's all a little more complicated than that. And there are all kinds of important differences between different types of motors which aren't obvious at first. But that's the basic explanation.
Thanks for explaination 👍
Wicked explanation honestly. You should teach lol
Thank you for the explanation. So, if the capacitor is not working and I physically rotate the fan blade, then the fan will start working?
@@isla2974 In theory yes, if you can spin it fast enough. Without the capacitor there is no "net force" pulling in any specific direction. And if you spin it slowly (compared to mains frequency), it will still essentially just be pulled back and forth in alternating directions. So on average it won't "want" accelerate in any direction. If you can get the motor close enough to it's normal operating speed however, you can get it to "catch" on mains frequency and keep on running, even without a capacitor.
@@phinok.m.628 thank you for the explanation!
Nice job, dude
Very good. Thanks 🙏🙏🙏🙏🙏
Thanks
Well said 👏👏👏
Hi i stripped the capacitor and power cable from the coil of a ecco stand fan how can this be fixed
Your super smart
hi i’ve been asking this question around, hope you’d be able to help. a few of my fan copper wires (maybe a couple) are broken, will it still be working or it’s dead now and need to replace a new motor?
the fan is not working at the moment, i’m not sure if this is what causing or the capacitor is dead. i’ve cleaned and put some lubricants but it still doesn’t work.
thanking you!
Can I use this capacitator on this fan for my camper for the converter box for the capacitor in the converter box
My brand-new Caterpillar fan stopped working when i accidently unplugged it while it was running. any idea what causesd that? It was also plugged into my modified sine-way inverter if that matters
Спасибо за просмотр
what if your motor have 5 wires and the fan only 4
I've heard that WD 40 isn't recommended for use in electric motors. 3-IN-ONE makes an oil specifically for electric motors. It comes in a can that looks just like their cans of household oil except they're blue and white instead of black and white.
I've taken many apart. Because they seize up. I clean the shaft and the bearings. I use lithium grease. Because it seems oil doesn't last as long. I am not experienced in the electrical aspects of a motor.
Does anyone know how to insert the CBB61? There are no holes open for it and the screw to go in except and hole that fits less that a quarter
Looking 4 a capicator for a national fan
Good explanation
A lot of cool electromagnetic theory and electric motor design info here! I wouldn't recommend 'wd-40' to lubricate the fan's bronze bushings though. Use an electric motor lubricating oil or I use engine oil, synthetic oil, etc. WD-40 is too light and goes away quickly. Thanks!
Sounds like a Belizean 👍🏾
Same thing I'm saying
Did you get it working again? Also WD40 isn't a lubricant
Can you please explain what is the purpose of the capacitor? You mentioned a variable fuse as well... so if 2 of 3 speed setting works, but the 3rd is broken (taking for granted that no other parts are broken like the button housing), is that a fuse problem or the capacitor? Just need your awesome input if possible before I order new parts as a DIYer... much appreciated! Great video btw!
The cap is used to start the motor by causing a slight forward offset better the two phases that control the magnetic fields... uh so it's playing while I'm typing and he does explain it, he just started explaining it at 5 minutes ish... he was more detailed than I was gonna be.
If you need more details than that than the following video will help. It's video 4 of a series on motors but this is where it's explained.
ruclips.net/video/2XYdTogWcIA/видео.html
I think the capacitor is rather analogous to the starter motor on a car.
@@abelsr5445 With the exception that in this case the cap varies the speed of the fan as well. You can understand this better if you watch a ceiling fan cap replacement vid.
No the rotor is not magnetic it rotate because of the high magnetic feild of the coils
Are you from Guyana?
I’m from Belize 🇧🇿
Ghumta nahi hi javab do