Affiliation of Author(s):机电学院
Journal:Beijing Hangkong Hangtian Daxue Xuebao
Abstract:Aimed at slow response and high-power consumption of high-speed on/off valve (HSV) controlled by single PWM signal, a compound PWM control strategy proposed from the point of view of the digital signal generation mechanism, which consists of reference PWM, excitation PWM, high-frequency PWM and reverse PWM. First, mechanism and working principle of compound PWM control strategy are given. Next, the influence rules of duty cycle of excitation PWM, high-frequency PWM and reverse PWM signals on performance of HSV are studied by simulation under different boundary conditions. Finally, the closed-loop controllers of these PWM's duty cycle are designed based on state variable feedback. Simulation results show that the proposed compound PWM controller can reduce power consumption and closing time of HSV effectively. The coil current is reduced by 80% at maximum position of the ball valve, and closing time of HSV is shortened by 62.5% approximately, compared with single PWM control strategy. © 2019, Editorial Board of JBUAA. All right reserved.
ISSN No.:1001-5965
Translation or Not:no
Date of Publication:2019-06-01
Co-author:Gao, Qiang,zyc,Luo, Zhang,lcz,chenxiaoming
Correspondence Author:Gao, Qiang,gq
Date of Publication:2019-06-01