Harmonic Current Suppression of Dual Three-Phase Permanent Magnet Synchronous Motor with Improved Proportional-Integral Resonant Controller

• DOI: 10.3390/en18061340
• Publication Date: 2025-03-10T09:46:52Z
• Authors: Lei Chen; Min Chen; Bodong Li; Xinnan Sun; Feng Jiang
• Keywords: Harmonic; Three-phase; Harmonic Analysis

The impedance of the harmonic plane in a dual three-phase permanent magnet synchronous motor (DTP-PMSM) is very low, meaning that even small voltages can induce significant currents, particularly at fifth and seventh frequencies. These currents severely degrade system performance increase losses. To address this issue, mechanism current generation due to non-sinusoidal back electromotive force (EMF) inverter nonlinearity first analyzed. Then, overcome challenge excessive controllers traditional suppression strategies, rotational coordinate transformation employed, which unifies reduces their number. Since proportional-integral resonant (PIR) are ineffective high-speed region, an improved PIR controller for proposed. This incorporates digital delay compensation, phase discretization correction minimize deviation between discretized frequency actual frequency. enhancements enable across entire speed range under varying load conditions, significantly reducing currents. Finally, proposed strategy experimentally validated.