do not use a phase control for a DC motor... you need over $100 in filtering to get it to work. oh it will work, for a while. it will pump out 120 hz noise and pit out the bearings too!
you are talking about a 16mH at 10A inductor and a 2200uF lytic capable of handling the ripple current to filter a phase drive for a 5A DC motor.
not sure what you are referring to. the motor effectively has a big inductor in it, but it would appear to the control circuit as having a loss dependent on motor speed and load