1. Drive circuit‐based torque‐ripple suppression method for single‐phase BLDC fan motors to reduce acoustic noise
- Author
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Guang-Zhong Cao, Chao Wu, Su-Dan Huang, Hong-Jin Hu, and Yeping Peng
- Subjects
010302 applied physics ,Computer science ,020208 electrical & electronic engineering ,Direct current ,02 engineering and technology ,01 natural sciences ,Computer Science::Hardware Architecture ,Control theory ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Harmonic ,Torque ,Commutation ,Torque ripple ,Electrical and Electronic Engineering ,Machine control ,Voltage ,Electronic circuit - Abstract
This paper proposes a drive circuit for single-phase brushless direct current (BLDC) fan motors to reduce their acoustic noise. First, the torque ripple of a single-phase BLDC motor is analysed theoretically. Then, a drive circuit that is capable of regulating the DC-link voltage during commutation to weaken the negative effect of current lag is proposed to reduce the acoustic noise of single-phase BLDC fan motors. Furthermore, the characteristics of the proposed drive circuit are discussed theoretically using a deduced analytical model of the proposed drive circuit. Additionally, simulations based on the finite element method and experiments are performed. The torque ripple and acoustic noise generated by the conventional and proposed drive circuits are compared. The simulation results show that the torque ripple is reduced by 16.1% when the proposed drive circuit is used, and the experimental results illustrate that the acoustic noise generated by the second harmonic of the torque ripple is reduced by 7.3%. Ultimately, the effectiveness of the proposed drive circuit is verified.
- Published
- 2019