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A Novel Application of Pseudorandom-Based Technique for Acoustic Noise and Vibration Reduction of PMSM Drive

This article presents a novel application of Pseudorandom Triangular Pulsewidth Modulation (PTPWM) technique on a permanent magnet synchronous motor (PMSM) drive to reduce acoustic noise and vibration (ANV). The proposed PTPWM method brings a significant reduction in torque ripples, acoustic noise, and vibrations in the motor, thereby enhancing the performance of the complete drive system under operation. The relationship between the stator current harmonics feed by drive and nonsinusoidal magnetic field flux distribution, with torque ripples is developed and analysed in this article. Furthermore, in-depth theoretical background and analysis about how PTPWM improves torque ripples, vibration, and acoustic noise of PMSM drives is presented. An extensive simulation and experimental investigations have been carried out for the validation of proposed control strategy.