What is role of Mosfet in regenerative mode?

We have a converter and we are using this converter to simulate Regen mode for a Ipmsm motor. During regen, with MOSFET being unidirectional, will the free wheeling diode do all the work? will we still need to give it PWM gate cycles ? and is there a way to control the regen voltage without using Active Short Circuit method?

Is there any link for me to study on this further?

Thank you in advance for answering my questions!