Compensation control algorithm for IPM machines considering temperature effects based on online multi-parameter estimation

For automotive applications, accurate torque production capability and high efficiency of the traction motor is very important. However, the performance of widely used interior permanent magnet (IPM) machines is influenced by temperature variations. In this paper, a control algorithm is proposed to compensate the performance variations in IPM machines due to temperature change based on online parameters estimation. Results show that the proposed compensation control method can successfully maintain torque production accuracy and maximum torque per ampere (MTPA) operation during temperature variation. Additionally, the torque accuracy can be also maintained in the flux weakening region.