Quote:
Originally Posted by Greg Fordyce
I still don't see a problem. Since the controllers would be connected in parallel, voltage is going to be the same. You would need to make sure both controllers get an identical throttle signal and then each controllers output will be matched. That is both controllers will be working to provide the same amp output and so should stay in balance...
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The power components (mosfets/igbts) will need to be switched identically in sync.
A rough hypothetical: Imagine that the two 1000A controllers are at full output, there is 2000A flowing in the motor loop, and the mosfets are on. If one controller's set of mosfets switch off before the other set, there will still be 2000A flowing, but now it's all flowing through one controller. poof! (The diodes only conduct when the mosfets are off and allows voltage at the drain pin to rise above B+)
Not that it can't be done, but I don't think it's necessarily as simple as wiring them up in parallel.