Effect of Electromagnetic Force Caused by PMSM on the Vibration/Noise of Reciprocating Compressors

Traditional methods equate the slotted stator as an unslotted model and employ an approximation where the stator deformations are considered inversely proportional to the fourth power of the order of air-gap electromagnetic force density (AEFD). This approach effectively overlooks the contributions of high-order forces. Furthermore, it overlooks the influence of tangential forces, as radial forces typically have significantly greater amplitudes than tangential. However, the effectiveness of this method has been questioned. This study aims to establish a novel method for accurately identifying the harmonic components of AEFD responsible for vibration noise by investigating the electromagnetic vibration noise source in a 9slot/6-pole fractional-slot concentrated-winding interior permanent magnet synchronous machine (FSCW-IPMSM). Initially, the modulation law of high-order force waves is investigated through a force conversion model, revealing the mechanism behind the strong modulation effect of high-order force waves. Subsequently, a quantitative analysis modulation force model is proposed. Building on this foundation, a multi-physics field coupling simulation method is employed to predict the electromagnetic vibration noise influence mechanism of high-order radial and tangential AEFD, as well as their coupling effects. The results demonstrate that the vibration noise at the frequency of 18fe in this motor is primarily induced by the coupling effects of highorder radial and tangential AEFD components. Neglecting the contribution of tangential AEFD significantly underestimates the actual vibration levels in the motor. The research outcomes emphasize the importance of considering tangential AEFD and high-order force modulation effects, providing a fresh perspective for accurately predicting the electromagnetic vibration sources in FSCW-IPMSM. INDEX TERMSFractional-slot concentrated-winding machine, high-order electromagnetic force, radial and tangential force, force modulation effect, motor noise source identification.

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Speed Regulation of PMSM Systems Based on a New Sliding Mode Reaching Law

Wang,

Jiao,

Xing

et al. 2024

IEEE Access

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This paper is concerned with the speed regulation of permanent magnet synchronous motor systems using sliding mode control. To deal with the contradiction between reaching speed and chattering while ensuring finite time convergence, a new sliding mode reaching law is designed by introducing a variable gain associated with system states. Based on this, a speed regulation controller is first designed for permanent magnet synchronous motor systems using the new reaching law to solve the speed regulation problem and improve system robustness. A rigorously theoretical proof is provided for the designed speed controller using our proposed practical finite time stability criterion. We further investigate the speed estimation of permanent magnet synchronous motors without mechanical sensors. To obtain more accurate rotor information, a new sliding mode observer is designed by incorporating a back electromotive force observer, whose validity is verified by Lyapunov theory. Finally, the correctness of our developed theory is verified through simulation studies.INDEX TERMS Permanent magnet synchronous motor, new sliding mode reaching law, sliding mode controller, sliding mode observer.

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Effect of Electromagnetic Force Caused by PMSM on the Vibration/Noise of Reciprocating Compressors

Cited by 3 publications

References 30 publications

Effect of Ferromagnetic Materials on Vibration of In-wheel Brushless Direct Current Motor for Light Electric Vehicle

Effect of Ferromagnetic Materials on Vibration of In-wheel Brushless Direct Current Motor for Light Electric Vehicle

Investigation of Noise Sources in Fractional-Slot Concentrated Winding Motors Considering High-Order Radial/Tangential Electromagnetic Force Combination and Modulation

Speed Regulation of PMSM Systems Based on a New Sliding Mode Reaching Law

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