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发布时间：2019-12-07

论文类型：期刊论文

发表时间：2019-12-01

发表刊物：IEEE TRANSACTIONS ON ENERGY CONVERSION

收录刊物：SCIE、EI

卷号：34

期号：4

页面范围：2052-2061

ISSN号：0885-8969

关键字：Torque; Stators; Trajectory; Permanent magnet machines; Permanent magnets; Couplings; Table lookup; Interior permanent magnet synchronous machine; MTPA operation; optimal current vector angle; step signal injection

摘要：In various applications that utilize maximum torque per ampere (MTPA) operation of interior permanent magnet synchronous machines (IPMSMs), there exist unexpected perturbations in electrical parameters and operating environment, which deteriorate the accuracy and efficiency of the MTPA operation. This paper establishes a step-signal-injection-based robust MTPA operation strategy for the IPMSM drives. The method works by injecting a step signal into the current vector angle and observing the response in the current magnitude, followed by a proportional-integral controller which returns the system to optimal operation. The stability of the proposed algorithm is established using the Lyapunov theory. A speed-servo control system of IPMSM is considered, where a disturbance detection unit is designed to switch operation between optimal current angle updating mode and steady-state MTPA operation mode. Since the optimal current angle updating is independent of machine parameters, the impact of system perturbations on the MTPA operation can be effectively suppressed. Extensive experimental results for IPMSM and hardware-in-the-loop-based machine are presented to validate the effectiveness and robustness of the proposed method.