QuoteI dont have a schematic,I here this sort of thing a lot from beginners. Tell me how on earth you can make anything if you don't have a schematic so you can see what you are making?Maybe it's me but I would not even think about trying to do that.
I dont have a schematic,
It seems the arduino cannot supply enough current to switch the IGBTs properly.
QuoteIt seems the arduino cannot supply enough current to switch the IGBTs properly.No, it takes virtually no current at all to turn a FET on. Not enough voltage perhaps but current no.If your design was on paper instead of your head maybe we could help you with it.
But if a MOSFET or IGBT is switching high voltage and current at high frequency (PWM basically) the gate doesneed large currents to charge up and down fast enough to reduce switching losses to acceptable levels.Also if switching high voltages with MOSFETs you may need a low-impedance gate driver or protection circuitryto prevent capacitive coupling from the drain to gate burning out your microcontroller. Especially true forinductive loads at switch-off.
I have to ask, why aren't you using a gate driver? When I played with a HV project (~400V) and an IGBT, I had to use a gate driver to prevent the IGBT from overheating, but I was PMWing the transistor.
I also need to figure out how in the world i can drill threaded screw holes into a larger heatsink.