all home built solar system

Author	Message
poida Guru Joined: 02/02/2017 Location: Australia Posts: 1461	Posted: 06:11am 09 May 2021         Solar Mike said   Poida, I would like to use your picoverter to drive a 100v H-Bridge that I am currently designing, and have a question about the driver signals it outputs to the mosfet power board. The VS1-Drv signal going to U1 (HO1,LO1) and VS2-Drv to U2, is one chip purely 20Khz spwm and the other 50Hz binary; or do you do some fancy switching inside the CPU to swap the spwm and 50Hz drive signals over every 100HZ so each chip shares the spwm. Cheers Mike It runs code that does the fancy switching. at some point in time: U1 drives LOW side FETS on, pulling VS1 to ground. U2 drives a SPWM 1/2 wave using LOW and HIGH side FETS. then, the roles are switched. Now U2 drives LOW side FETS on, pulling VS2 to ground. And U1 does the SPWM with LOW and HIGH side FETS driving VS1 I did have code that mimicked the EG8010. But after a prod from Wiseguy I made the above code and it works as good if not a little better than EG8010. Edited 2021-05-09 16:16 by poida