期刊
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
卷 57, 期 4, 页码 4091-4106出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIA.2021.3074609
关键词
Torque measurement; Torque; Regulators; Voltage control; Synchronous motors; Permanent magnet motors; Inverters; Flux-weakening control; frequency modulation pulsewidth modulation (FMPWM); genetic algorithm (GA) technique; surface-mounted permanent magnet synchronous motor (SPMSM); torque ripple reduction
资金
- National Natural Science Foundation of China [51877093, 51707079]
- National Key Research and Development Program of China [2018YFE0100200]
- Key Technical Innovation Program of Hubei Province [2019AAA026]
This article proposes an optimized strategy to effectively reduce torque ripple in surface-mounted permanent magnet synchronous motors operating in the flux-weakening region. By adjusting the PI parameters and utilizing an improved fitness function, drive stability can be enhanced, leading to reduced copper and switching losses.
One of the parameters required for a high-performance drive of a surface-mounted permanent magnet synchronous motor (SPMSM) operating in the flux-weakening region is the torque ripple reduction. In general, the torque ripple results from many reasons, such as the machine structure, oscillations of measured speed, etc. Hence, this article proposes an optimized strategy that works in conjunction with a variable switching frequency pulsewidth modulation algorithm to reduce the torque ripple peak. For the modulating algorithm, the updated frequency changes linearly with the desired torque ripple and its predicted maximum peak. For the proposed strategy, the reflection of proportional-integral (PI) parameters is observed at the torque ripple caused by the current ripples. Therefore, a robust method for adjusting PI parameters is proposed that relies on the improved fitness function that can minimize the regulators' error and maximize the drive stability bandwidth in the flux-weakening region. This objective function is optimized offline using a genetic algorithm optimization technique. Meanwhile, a third-order generalized integral flux observer is applied in this article, providing evidence of torque ripple reduction. For driving in the flux-weakening region, the reference magnitude of the duty cycles can produce the required d-axis reference current to prevent the saturation of current controllers. Finally, comprehensive simulations and experiments are presented to validate the proposed strategy effectively. In comparison with the conventional method, the proposed strategy can reduce the copper and switching losses simultaneously and control the current and speed in the flux-weakening region efficiently.
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