System for power conversion with feedback to reduce DC bus loading

A power conversion system comprising:

• a converter circuit configured to convert a multi-phase AC input power to produce a DC bus, the converter circuit including a plurality of rectifier switching devices controlled by a plurality of rectifier switching control signals;
• an inverter circuit coupled to the DC bus, the inverter circuit including a plurality of inverter switching devices controlled by a plurality of inverter switching control signals to produce a multi-phase AC output power for driving a load;
• and
• a controller executing a program stored in a non-transient medium operable to:
• (a) receive a feedback signal corresponding to the multi-phase AC output power;
• and
• (b) adjust the plurality of rectifier switching control signals according to the feedback signal to stabilize the DC bus,
• wherein the feedback signal is applied in a control loop for adjusting the plurality of rectifier switching control signals, wherein the control loop is one of first and second control loops with one control loop controlling voltage and the other control loop controlling current, and wherein one control loop is fed forward to the other control loop for adjusting the plurality of rectifier switching control signals.