Various aspects of home brew inverters


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Solar Mike
Guru

Joined: 08/02/2015
Location: New Zealand
Posts: 1138
Posted: 08:24pm 13 Mar 2019      

Great work there Poida.
To minimize the HF gate oscillations try placing a ferrite bead over each of the mosfet gate leads, or use a smd ferrite bead on the pcb at the gate connection, high current ones are available from element14 #2292371 that will handle the 8amp drive current pulses.
Better yet is to have a totem pole buffer driver on each mosfet, this achieves better off signal clamping and helps prevent any shoot through, I use the ZXGD3005, they are only 50c each, need a magnifying glass to solder them though..

Cheers
Mike