nice video sir, i don't have any knowledge about power inverter can you tell me which type of inverter will be suitable for submersible water pump 1hp and what should be watts.thanks
yup, other people suggested that too and I did try the inverter on a car battery while running my dremel tool and it did alright. Since then I have also bought a beefy 12V power supply which will be features in a future video.
I did buy one of those sine-wave modules, but mine has the IR2113 instead of the IR2110. Never got around playing with it since my plate is already full with project. I will keep it for the time (if and when) I build a 1-2KW inverter for my cabin. Thanks for yet another great video.
good review but on a side note isn't a to-220 package 7805 rated for 1.5A so depending on the input voltage will determine how quick it reaches thermal shut down?
What's the mechanism for making the output sinusoidal here? Is it just the inductor after the H-bridge with a 50Hz square wave? Or is the chip switching the mosfets in a more complicated way? I would have thought if it were that simple then why wouldn't every inverter put an inductor in series with the output. I would be interested to see the mosfet behaviour on the scope if you think other viewers would also be interested.
something more complicated than a square wave, otherwise they wouldn't get that perfect looking sine wave. Sounds like a good idea for the next video, probing those output mosfets with the scope.
VoltLog To achieve high efficiency mosfets must be used in on or off and spend as little time as possible in between and the worse would be to use them in a linear mode. The 4 output mosfets form a H bridge. The controller sends a variable pwm signal to control them. The LC filter at the output removes high frequency from the output. Note that 50Hz is quite slow compared to typical switching frequencies (order of magnitude 100KHz) So by varying the duty cycle continuously you get your sin wave. It's the same method used in 1 bit dac or class D audio amplifiers
0:07 - only 7 seconds in when you said "pure sine wave inverter" and I saw the poor hand drawn "sine wave" on the box I was "nope, not quality". If they can't produce a good image of a sine wave what else have they cut corners on? Many quality manufacturing issues and I am surprised by the slow 3 second voltage ramp up. And with reasonable filtering the 7805 shouldn't have 500mV of noise. That's just nuts! I would have liked to have seen the input of the 7805 on the scope and I wonder what voltage it is being provided. I'm guessing it is straight from the "battery" source so the 7805 has to drop 7+ volts. No wonder it is cutting out so quickly.
This video just set me wondering if there would be any merit in using one of these instead of an isolating transformer when working on mains powered equipment? Isolation transformers are very expensive but I already have an inverter
plsss i need your help. ihave 2000w inverter souer brand and i want to adjust the voltage cut off it shutdown on 10.5v and i want to adjust it 9.5v because im using alum battery it has lower resting voltage:(
Nice, thorough examination and analysis. Given the quality of the sine wave, seems like a good deal. If the USB current is a big deal, maybe someone could add a heat sink to the 7805. Looks like enough room for that. I used your link and see they do offer a 110VAC version at only $38. Got a 1 star review from one reviewer who said it only delivered 230W at 1.0 power factor and 13.9VDC. $38 isn't too bad for this quality of sine wave though. Think I'll get one. Thanks for your review.
There are also control modules available on Ebay & Aliexpress if you feel like building the converter yourself. If not, a ready made one should be ok if it's not pushed to it's limits.
Thanks for an honest opinion and tear down of this product. I am always a little concerned with high voltage stuff from China. They do look like they are getting better and one day may be the go to source for electronics.
I have 2000 watt and 500 watt pure sine wave inverters from Reliable Electric (Ebay) and both units deliver a cleaner sine wave than the elctric co-op that provides commercial power to our area.
The IRF (Infineon) components are pretty good. Only the thermal design is pretty bad. I wonder how this thing will last over time actually. edit: Modulation freq of 23.4kHz is also not something to be very happy with
do you think such a module can be bought on aliexpress? would be cool if we could just slap our own big mosfets on there and create higher power versions also i finally started making videos. at least a few :P on my Electronic Savage channel
the EG8010 module even supports an LCD "EG8010’s LCD communication control protocol supports ST7920 LCD modules such as 12832" so you can easily get info like output voltage, current, frequency and temp.
You can find a good quality "12V" high current PS without resorting to using a computer PS. They are often used for amateur radio and many have a variable output from about 5 to 16 volts with current capability of 25A+ continuous with surge of 30A+. And with low noise. If you need some suggestions let me know.
I'm pretty sure I can easily find a good quality high power 12V power supply these days but nothing can beat the price of a used server power supply which goes for around $15 on ebay.
I was a little amused when you said the universal output socket would work with US, European, *even* Australian... Is the Australian plug considered somehow strange?
If you zoom out it takes so long to see the signal again :/ Even when you're still zoomed in like at 4:00. Maybe I'm exaggerating now I look at it again 0:-) But I would say it should be able to update faster. :D Sorry!
that delay is probably caused by the fact that I was adjusting the horizontal continuously during those few seconds and maybe because of the 6-7 Mpoints memory depth (it was on auto)
Use your car battery ;) Used to use a 1000W inverter when I drove transport trucks. Enough to run a small microwave, tv, etc... However had to be careful because even with 3 truck heavy duty batteries these will run your battery down quickly if not careful.
I thought about buying a car battery, the cheapest I could find was around 50 euros, but then i wouldn't use it for anything else so I would just be polluting the environment with no good reason.. A server power supply is cheaper and I could use it for other projects as well.
I think the output current of 500mA on the USB jack is ok, because USB is just specified up to 500mA. But man, the ripple of the USB output is just awful.
ok, i agree with you. That sucks. Then you cant evenly charge a phone or something with it. Ever thought about apllying a little heatsink to it? I've ran into a similar problem a few weeks ago. I've had a buck converter chip which ran a little bit hot so i glued a little sheet of aluminium onto it. I know, its crude but it did the job :)
You could use the FFT fonction of the scope to get an idea of the purity of the sine wave
Ok, I will do a future video, taking a look at that.
Thanks for the honest opinion of the product. Always a pleasure to watch your videos.
thank you!
nice video sir, i don't have any knowledge about power inverter can you tell me which type of inverter will be suitable for submersible water pump 1hp and what should be watts.thanks
Nice to see honest video. We all have temporary lapses of understanding. Young people need to be ok with that.
Why does it get rectified to dc after conversion to 390v ac. Why doing dc to ac to dc to ac instead of just dc to ac and filtering?
For a high current 12V source, use a lead acid car battery. If you have a car, connect it to the battery with engine running.
yup, other people suggested that too and I did try the inverter on a car battery while running my dremel tool and it did alright. Since then I have also bought a beefy 12V power supply which will be features in a future video.
Hello VoltLog, can you provide the link of datasheet/ schematic of this inverter
Hello can the low voltage warning be set to 11 volts instead o the 10.5 volts ?
Great analysis! So they’re using a half-bridge topology for the dc dc converter. Interesting...
I did buy one of those sine-wave modules, but mine has the IR2113 instead of the IR2110. Never got around playing with it since my plate is already full with project. I will keep it for the time (if and when) I build a 1-2KW inverter for my cabin.
Thanks for yet another great video.
no problem!
Thank you for the detailed review! Did you connect the probe directly to the output of the inverter?
What kind of Toroidal core do they use on output LC filter?
good review but on a side note isn't a to-220 package 7805 rated for 1.5A so depending on the input voltage will determine how quick it reaches thermal shut down?
1.5A with adequate cooling not free standing like in this case, but what you said it's true.
What's the mechanism for making the output sinusoidal here? Is it just the inductor after the H-bridge with a 50Hz square wave? Or is the chip switching the mosfets in a more complicated way? I would have thought if it were that simple then why wouldn't every inverter put an inductor in series with the output. I would be interested to see the mosfet behaviour on the scope if you think other viewers would also be interested.
something more complicated than a square wave, otherwise they wouldn't get that perfect looking sine wave. Sounds like a good idea for the next video, probing those output mosfets with the scope.
VoltLog To achieve high efficiency mosfets must be used in on or off and spend as little time as possible in between and the worse would be to use them in a linear mode. The 4 output mosfets form a H bridge. The controller sends a variable pwm signal to control them. The LC filter at the output removes high frequency from the output. Note that 50Hz is quite slow compared to typical switching frequencies (order of magnitude 100KHz) So by varying the duty cycle continuously you get your sin wave. It's the same method used in 1 bit dac or class D audio amplifiers
how is 390vDC stepped down to 220vac? do they use fb at beginning to vary 390v to 220dc? and use H bridge SPWM to form AC?
I learned so much from this video - sir you are a star
0:07 - only 7 seconds in when you said "pure sine wave inverter" and I saw the poor hand drawn "sine wave" on the box I was "nope, not quality". If they can't produce a good image of a sine wave what else have they cut corners on? Many quality manufacturing issues and I am surprised by the slow 3 second voltage ramp up. And with reasonable filtering the 7805 shouldn't have 500mV of noise. That's just nuts! I would have liked to have seen the input of the 7805 on the scope and I wonder what voltage it is being provided. I'm guessing it is straight from the "battery" source so the 7805 has to drop 7+ volts. No wonder it is cutting out so quickly.
yup, you're pretty much right, they've cut allot of corners on this product. I'm not sure on the slow ramp-up but it might be a feature not a bug.
This video just set me wondering if there would be any merit in using one of these instead of an isolating transformer when working on mains powered equipment?
Isolation transformers are very expensive but I already have an inverter
That is actually a pretty interesting idea, it should work well. Thanks for the tip.
Hello Sir Thanks for sharing.... If possible to share the output inductor value and specifications of the core and wire details please... More helpful
plsss i need your help. ihave 2000w inverter souer brand and i want to adjust the voltage cut off it shutdown on 10.5v and i want to adjust it 9.5v because im using alum battery it has lower resting voltage:(
would it be possible to change the input voltage from 12 to 24v?
thanks :-)
Very good video my friend. I like. Can you tell me the link for inductor ac? Thank you very much
Any chance of a full schematic to study? I love SMPS and inverters and study them every chance I get, to learn new tricks.
Unfortunately there is no schematic for this inverter...
Nice, thorough examination and analysis. Given the quality of the sine wave, seems like a good deal. If the USB current is a big deal, maybe someone could add a heat sink to the 7805. Looks like enough room for that. I used your link and see they do offer a 110VAC version at only $38. Got a 1 star review from one reviewer who said it only delivered 230W at 1.0 power factor and 13.9VDC. $38 isn't too bad for this quality of sine wave though. Think I'll get one. Thanks for your review.
There are also control modules available on Ebay & Aliexpress if you feel like building the converter yourself. If not, a ready made one should be ok if it's not pushed to it's limits.
Thanks for an honest opinion and tear down of this product. I am always a little concerned with high voltage stuff from China. They do look like they are getting better and one day may be the go to source for electronics.
Thank you for watching!
I have 2000 watt and 500 watt pure sine wave inverters from Reliable Electric (Ebay) and both units deliver a cleaner sine wave than the elctric co-op that provides commercial power to our area.
Do you know what frequency the output MOSFETS are being driven at?
I think I'll do a follow-up video where I probe the output mosfets so we can get a better look at how their driven.
AndyP egs8010 23,4khz
The IRF (Infineon) components are pretty good.
Only the thermal design is pretty bad.
I wonder how this thing will last over time actually.
edit:
Modulation freq of 23.4kHz is also not something to be very happy with
use the 12v output of a pc psu...
I didn't have any on hand.. but I will get myself one of those server power supplies.
VoltLog *laptop fan detected.
do you think such a module can be bought on aliexpress? would be cool if we could just slap our own big mosfets on there and create higher power versions
also i finally started making videos. at least a few :P on my Electronic Savage channel
thats me :P
the module is vailable on the usual two: ebay and aliexpress, just search for eg8010, I've also placed a link in the description
the EG8010 module even supports an LCD "EG8010’s LCD communication control protocol supports ST7920 LCD modules such as 12832" so you can easily get info like output voltage, current, frequency and temp.
i hope i will remember them when i want to build such a thing
You can find a good quality "12V" high current PS without resorting to using a computer PS. They are often used for amateur radio and many have a variable output from about 5 to 16 volts with current capability of 25A+ continuous with surge of 30A+. And with low noise. If you need some suggestions let me know.
I'm pretty sure I can easily find a good quality high power 12V power supply these days but nothing can beat the price of a used server power supply which goes for around $15 on ebay.
tolong inventerku 300w pure sine wave buat kulkas ga mau ngankat apanya yaa
I was a little amused when you said the universal output socket would work with US, European, *even* Australian... Is the Australian plug considered somehow strange?
not necessarily, maybe just a poor choice of words on my side.
Don't forget UK as well.
If you don't have any filtering on, why is your oscilloscope so terribly terribly slow?
what do you mean, the scope is not slow ?!
If you zoom out it takes so long to see the signal again :/ Even when you're still zoomed in like at 4:00. Maybe I'm exaggerating now I look at it again 0:-) But I would say it should be able to update faster. :D Sorry!
that delay is probably caused by the fact that I was adjusting the horizontal continuously during those few seconds and maybe because of the 6-7 Mpoints memory depth (it was on auto)
(Y) Sorry, my brain is a bit cooked from writing a thesis all day...
Thanks. Good info. 👍🏼👍🏼👍🏼👍🏼👍🏼👍🏼👍🏼👍🏼
Very nice review ! And you have respect for your tools, because you cleaned it. I liked that.
Thank you! Yes I respect my tools & equipment and I like to keep them clean.
Very nice presentation.
Use your car battery ;) Used to use a 1000W inverter when I drove transport trucks. Enough to run a small microwave, tv, etc... However had to be careful because even with 3 truck heavy duty batteries these will run your battery down quickly if not careful.
I thought about buying a car battery, the cheapest I could find was around 50 euros, but then i wouldn't use it for anything else so I would just be polluting the environment with no good reason.. A server power supply is cheaper and I could use it for other projects as well.
I think the output current of 500mA on the USB jack is ok, because USB is just specified up to 500mA. But man, the ripple of the USB output is just awful.
unfortunately it's 500mA only for a limited time until the regulator gets into thermal protection.
ok, i agree with you. That sucks. Then you cant evenly charge a phone or something with it. Ever thought about apllying a little heatsink to it? I've ran into a similar problem a few weeks ago. I've had a buck converter chip which ran a little bit hot so i glued a little sheet of aluminium onto it. I know, its crude but it did the job :)
this is bad solution, 7805 is very inefficient converter... proper solution was to have buck converter at the end.
Really interesting. Maybe even the horrible Brazilian socket would fit there.
looks like it would fit
very good
I gotta get me some of that flux cleaner. Too many dirty PCBs from the floor in China.
Yup, pretty useful to have some flux cleaner.
you're missing 10 Hz there buddy 😂 (JK)
:-)
In Europe is 50Hz 230V
Cheap, $38 from USA warehouse. Hmmmmm...
too much useless talking