Suppression Strategies of Electromagnetic Switch High-Frequency Holding Noise
Tang Longfei1,2, Zhuang Jianxiong1, Sun Huaiyi1, Xu Zhihong1,2
1. School of Electrical Engineering and Automation Fuzhou University Fuzhou 350108 China; 2. Fujian Key Laboratory of New Energy Generation and Power Conversion Fuzhou 350108 China
Abstract The problem of high-frequency holding noise caused by electromagnetic switch under PWM closed-loop control is studied, and an adaptive control strategy for electromagnetic switch high-frequency holding noise is proposed in this paper. Firstly, the mechanism of electromagnetic switch high-frequency closed-loop noise is analyzed, and three measures are proposed to suppress the high-frequency noise. Secondly, according to the actual operation characteristics of electromagnetic switch, an adaptive suppression strategy of electromagnetic switch high-frequency holding noise based on fuzzy control is designed. By integrating the advantages of on/off control, self-tuning PID control and pseudo open-loop control, the noise suppression measures are implemented. Finally, the electromagnetic switch co-simulation model is constructed, and the rapid control prototype verification system of electromagnetic switch based on CompactRIO is developed. The frequency domain analysis of electromagnetic switch noise and vibration signal is carried out, and the control strategy is verified. Simulation and experimental results show that the proposed control strategy can effectively suppress the high-frequency holding noise of electromagnetic switch.
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