Why you are using DSP controllers in motor?

Answer 1

Any controller used in motors or electrical drives are only to get variable speed or variable torque or to get higher efficiency.

The controller can be anything, it might be micro controller or it can be DSP controller or may be other.

But DSP controller finds some advantages over micro controller.

Both the controllers are Digital controllers only, but DSP controller has inbuilt Analog to Digital converter, inbuilt Digital to analog converter , inbuilt counter and inbuilt pulse generator.

With a micro controller we need to assemble all the above converters, counters and pulse generators externally, so DSP based electrical drives are more popular though the cost is more compared to micro controllers.