IPMSM Drive System for Electric Vehicle Use FOC with MTPA and FWC Technique

Electric vehicle motors must exhibit high efficiency, high power density, high torque, and minimal use of magnetic materials, making the interior permanent magnet synchronous motor (IPMSM) an optimal choice. However, achieving maximum torque across the entire operational range is a challenging task. This paper presents a control strategy for IPMSM using field-oriented control (FOC). For operations below the rated speed, the maximum torque per ampere (MTPA) method is applied, while for speeds exceeding the rated level, field weakening control is employed. Moreover, rotor position measurement is enhanced by integrating an adaptive gain mechanism with a complementary filter, effectively mitigating the effects of external disturbances. This results in a system with low steady-state error. The system also incorporates CAN bus communication to facilitate seamless interfacing. The proposed controller was tested on a 13 kW IPMSM. The test results reveal that the control system achieves excellent dynamic response, accurately tracks reference speeds, and maintains minimal steady-state error.