Quote:
Originally Posted by duncan
Hi Paul
I have put 300km on my car - including a sprint - great fun,- I was not last (almost though)
Anyway I had better get onto fixing my controller,
I have been looking at using GiGamos MOSFETS as you suggested - IXFK170N20T
These are 170 amps rather than 130 amps
The gate charge is higher - 265nC rather than 241nC - only 10% more
I was thinking of using the same diodes and capacitors (new ones)
With these higher current MOSFETS I hope to be able to turn the motor current up to about 700 amps
I will also replace the MIC4451 - I hope I don't damage the control board!
Will I be able to use the current sensor or will I have to upgrade that as well
Or am I barking up the wrong tree altogether?
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IIRC, the limiting factor in the 500A controller is more the diodes then the fets. I would say upgrade the diodes and you can probably push it to 700A as long as the controller stays cool.
-Adam