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JPE, Vol. 19, No. 4, July 2019
Virtual Signal Injected MTPA Control for DTC Five-Phase IPMSM Drives
Guohai Liu, Yuqi Yang, and Qian Chen
Area Adjustable Speed Drives
Abstract This paper introduces a virtual signal injected maximum torque per ampere (MTPA) control strategy for direct-torquecontrolled five-phase interior permanent magnet synchronous motor (IPMSM) drives. The key of the proposed method is that a high frequency signal is injected virtually into the stator flux linkage. Then the responding stator current is calculated and regulated to compensate the amplitude of the flux linkage. This is done according to the relationship between the stator current and the stator flux linkage. Since the proposed method does not inject any real signals into the motor, it does not cause any of the problems associated with high-frequency signals, such as additional copper loss and extra torque ripple. Simulation and experimental results are offered to verify the effectiveness of the proposed method.
Keyword Direct torque control (DTC),Five-phase interior permanent magnet synchronous motor (IPMSM),Maximum torque per ampere (MTPA),Virtual signal injection (VSI)
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