Various aspects of home brew inverters

Author	Message
Madness Guru Joined: 08/10/2011 Location: Australia Posts: 2498	Posted: 11:57am 28 Mar 2017         Solar Mike said     oztules said   It just does not seem to be critical, much as the theory says it is. I'm just not convinced so far. oztules Well theory goes out the window sometimes in the real world when other factors come into play, there are many combinations of builds that are out there, slightly different transformers, different layouts, suspect quality of some Chinese sourced components; these no doubt all have an effect. >> Has anybody seen details of the 7500W Chinese Inverters that have 2 extra MOSFETs in the gate drive circuits as shown here . Yes they are TIP41C and TIP42C transistors driven by the IR2110 as a totem pole complementary pair, I have one of those boards, will see if I can trace out their circuit connection. Great idea placing them close to the driven mosfets. Cheers Mike Thanks Mike I would really appreciate the gate circuit. While I have no doubt about Oztules success I just can't replicate it, I have built probably 8 or 9 power pcb's with various changes all aimed at matching the design of the chinese boards and blown up over to 200 FETs. So far I have not been able to build an Inverter with more than 12 MOSFETs that produces a clean waveform with no spikes. I have got close with 24 MOSFETs, but best I have done is 10 days running the house. Maybe I just don't have the right DNA to make it work. There are only 10 types of people in the world: those who understand binary, and those who don't.