what you describe is not a "H" style anything. And this is not a good video, it's mis-informative. it's also 2 yrs old, so I'm not gonna bother, but it should be pulled down

You would have to have 4 diodes to make a full wave bridge , But you should know this if you've been building power supplies !!!

​@@Jimmeh_Bwhat would be more accurately informative?

"Real sine wave output" is a misnomer in the inverter world. They get closer to the "real" thing but don't/can't produce a true real sine wave form.

@@aday1637 maybe not that old rats nest, but i own 2 china pure sinewave inverters,about 150 euro each (3000w---all day.. to 5000 watts peak to start the air compressor) and,yes sir, a perfect sinewave, more stable,at 219-220VAC than the public utility's (from 225 to 243!!); the output filter,inductor and double brown caps are big enough to maintain the sine wave at full load. I,as a hobby,repair and sell china home solar inverters.

hello i got 1000w inverter i want to know what kind of wave i got is square wave or what how do i know and i want to rise up the frequency pleas if u can help

thx

Just use an electric fan to check if your inverter is a square or modified sine wave. If you hear humming sound then its a square wave or modified sine wave. If pure sine wave, you dont hear a humming sound.

Ask me why I agree with you.

I have a question, I recently purchased an aims split phase 240v/48v inverter charger. I powered up my up right garage freezer with it, but it gets extremely hot. Not sure what could be causing it. I did buy it for taking a few circuits off the grid, I'm just testing it for now.

It could be but also from my experience I would say that you're losing more than 20% of your energy because of the loses, on the low frequency type. I would go for a good high frequency and good quality inverter, and for the well pump I would put a slow start, inrush current limiting module. This will also prolong the well pump life. On more than 15 years working with them, I would definitely go for a good high frequency type, no doubt of it. I've learned my lot of lessons. But you definitely have a point. Those low frequency inverters are very reliable. Still, with the actual technology I'll always say that isn't worthy anymore. Cheers!

Inverters are used in RV vehicles.

I don’t think is totally like you say . 1) toroidal transformer inverter are much more efficient that real LF, that have a square iron transformer. Almost like HF. 2) they’re companies that produce both and absolutely recommend LF for repeated high surge inductive loads. They explain specific in they’re sites. I have a doubt. Victron energy call he’s toroidal “hybrid HF” and not LF. Why?

never answered but the diagram indicated that it cant be anything but grid tied as there is no battery

@@ometec Which brings to mind the fact that the review is incomplete and leaves you with more questions than answers.

​@@aday1637to be fair, he probably meant to only compare both types of inverters according to what he demonstrated - the type of transformers and circuits they hold.

wrong

You do need the high frequency transformer, to step the voltage up to about 200 volts. What he's calling the filter, is actually another set of four transistors, which serve the same function as the first four in the low frequency, except it's a perfect square wave, at about 40 kHz. The section he calls the "filter", is actually a rectifier, and the pulse width modulator, who's output, like you said, must go through an inductor to integrate out the high frequency switching, and leave just the 50/60 Hz sine wave. There is always a capacitor from the output of the inductor to ground as well. He missed the entire high voltage DC link. That's why high frequency inverters are more complicated. Of course, you understand, a true sine wave inverter is just a crude but powerful class D amplifier, with a built in signal generator. Mine uses a turnary output stage, so it can produce 120 V RMS, from a 200 volt DC bus. Only 2 of the four transistors do high speed switching and pulse width modulation. The other 2 transistors switch high and low, right at 50/60 Hz. At the zero crossing, the slow transistors transition from one rail to the other, The PWM produces a half wave, then inverts the half wave, as the polarity is switched. It's like a bridged output stage, one carries the signal, the other reverses polarity. That saves switching losses, and only requires one, rather than 2 inductors.

You just don't understand , they use a high frequency transformer made from manganese - ( zinc ) ferrite . But thats only part of it. Whenever I see something that I know to be wrong like this , I research the crap out of it !

I do understand your first point (about the batteries) but calling it a bogus review is a little over the top. He reviewed two different types of transformers from manufacturers, ones which don't seem to have terminal inputs for a battery. Of course, the video could have been made to be more informative, listing some of those points you have mentioned and even more.

generally, high frequency inverters are more efficient

@@julianschulte339 ...and much more unreliable.

No, he sounds like Mr. Rogers to me.

You're both morons

Not even close, to me...

I was thinking Al Bundy

Sounds more like a lying politician to me.