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Originally Posted by BrianG
So, I am correct that the FETs simply apply a controlled short to the motor? If that is the case, how can the voltage develop across a short (aside from FET rdson) to get any higher? I'm not disagreeing or arguing, just trying to understand how the braking works. The rest seems relatively easy from a macro standpoint...
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If controller doesn't open FET's then BackEMF from motor will be rectified by built-in diodes and will be charging battery, if battery voltage will be less then backEMF+voltage drop. You can optimize this process if you open FETs in sync with diodes, then you will cut off diodes voltage drop and losses.
If you noticed braking can be done with only one side, while recuperating involved both.
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