Title: Automatic control method of AC asynchronous motor variable frequency speed control based on CEEMDAN-wavelet threshold

Authors: Dandan Zhao; Xiaodong Zhang

Addresses: Department of Automation Engineering, Henan Polytechnic Institute, Nanyang, 473000, China; Henan Industrial Embedded Network Control Engineering Technology Research Center, Nanyang, 473000, China ' Department of Automation Engineering, Henan Polytechnic Institute, Nanyang, 473000, China

Abstract: In order to overcome the problems of low response speed, poor control accuracy, and low baud rate in motor variable frequency speed control, an automatic control method for motor variable frequency speed control based on CEEMDAN wavelet threshold was designed. Firstly, collect motor signals and decompose them through CEEMDAN; then, use wavelet threshold to remove high-frequency component signal noise; finally, calculate the frequency of variable frequency speed control and use a current and speed dual closed-loop PI controller to control the motor speed and load torque, achieving automatic control of variable frequency speed control. The results show that after applying the method proposed in this paper, the minimum speed deviation is only 29 RPM, the minimum response speed is only 628 ms, and the control baud rate varies between 147 and 180 bps/h. This verifies the effectiveness of the motor variable frequency speed control method proposed in this paper.

Keywords: AC asynchronous motor; variable frequency speed control; CEEMDAN decomposition; wavelet threshold; control frequency.

DOI: 10.1504/IJMIC.2024.142261

International Journal of Modelling, Identification and Control, 2024 Vol.45 No.2/3, pp.100 - 109

Received: 07 Oct 2023
Accepted: 29 Feb 2024
Published online: 16 Oct 2024 *

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