Active Thermal Management for Interior Permanent Magnet Synchronous Machine (IPMSM) Drives

This paper proposes an active temperature management scheme for Interior Permanent Magnet Synchronous Machine (IPMSM) drives based on the model predictive control concept. The proposed control scheme can adaptively set torque limit based on thermal state of the machine in order to limit the machine winding and end-winding temperatures. A temperature feedback loop is also adopted to compensate the error in the machine thermal model. The proposed control scheme is assessed by experiments on a laboratory machine drive system and simulated for traction drives over World-wide harmonized Light duty Test Cycle (WLTC) cycles. Compared with conventional traction control scheme, the proposed scheme can effectively reduce peak temperature and hence thermal stress of the machine.