I've never used a MOSFET. The first time I've had a need for them is now for trying to make a motor controller for a big truck starter motor (not modifying a vehicle, just using vehicle parts for something else), so I will need hundreds (possibly >1000A) of amps capacity. I have read that MOSFETS are more easily paralleled than IGBTs because of their positive temperature coefficient (less chance of frying them) vise the IGBT's negative temperature coefficient. I have also read that there are problems encountered when paralleling MOSFETS handling currents like this because of the extremely massive PCB traces needed and also in trying to get them to turn on/off at the same time.
I have this MOSFET in mind (10 in parallel for 1320A capacity, just to be safe).
To get around the need for acres of PCB space, I am thinking of soldering the leads directly to thick bus bar or large gauge wire. Will that cause me a problem? Capacitance?
How do I get them to turn on/off at the same time?
What kind of driver do I need? Will one driver drive all 10?
FYI this is not an H-bridge; only one direction rotation needed.
I have this MOSFET in mind (10 in parallel for 1320A capacity, just to be safe).
To get around the need for acres of PCB space, I am thinking of soldering the leads directly to thick bus bar or large gauge wire. Will that cause me a problem? Capacitance?
How do I get them to turn on/off at the same time?
What kind of driver do I need? Will one driver drive all 10?
FYI this is not an H-bridge; only one direction rotation needed.