Comparison of two passive solutions for noise reduction of PWM-fed induction machines

Abstract

In this paper, two passive solutions for noise reduction of PWM-fed induction machines are compared: the use of LC filter connected between the PWM inverter and the machine, and a three-phase damper wound inside the machine and connected to three capacitors. Firstly, the principle, advantages and disadvantages of each solution are recalled. The equivalent electrical circuits used for the study are also explained. Then, the effectiveness of both solutions in terms of voltage harmonic reduction and harmonic flux density reduction is discussed. The weight and size criteria are also studied. Results are given for two different power ranges of induction machines: 4 kW and 55 kW, and for two different switching frequencies of the PWM inverter: 3 kHz and 8 kHz.

Damper Winding for Noise and Vibration Reduction of a Permanent Magnet Synchronous Machine

“…The flux density harmonic amplitude is proportional to the magnetizing current , where h should be for a given harmonic. A simplified expression is given [ 38 ] as where is the magnetizing inductance, p is the pole pair number, is the number of turns in series per phase, is the inner stator diameter, and L is the length of the stator armature. The radial component and the tangential component of the th flux density harmonic: , can be characterized by the pulsation , angular position , amplitude or , spatial harmonic number , and initial phase in the poles machine [ 39 ]: and correspond to the fundamental components.…”

Optimization of a damper system for noise and vibration reduction in a PMSM

“…These methods can generally be categorized into two types: passive and active methods as explained in Bauw et al (2017). The advantage of passive noise reduction techniques lies in their ability to mitigate electromagnetic noise and vibrations without the need for additional power as mentioned in Balavoine et al (2019). It offers a promising avenue for achieving quieter electric motors with various optimization strategies.…”