Abstract：In order to improve the dynamic and steady-state performance of the electrohydraulic control system, a high-speed solenoid drive circuit with low power consumption was presented, which was based on pulse width modulation (PWM) by using dual voltage synthesized method. Unlike common dual power switching circuit, it synthesizes a dual voltage signal by combing a monostable trigger circuit, a reverse input summation circuit and a reverse proportional operation circuit, and then generates a pulse width modulation signal with dual duty ratio compared to a high frequency triangle wave signal, and finally outputs power by the amplifier. As a result, a PWM signal with 100% duty ratio in the initial stage achieves the armature in high speed by rapid current rise of solenoid coil, and the low power consumption is maintained with a 10% duty ratio after the end of the movement. It can avoid the complexity and real-time performance of dual power switching circuit design. Theoretical model of the high-speed solenoid and circuit is hence established, and the simulations regarding the dynamic and steady-state performance were verified by experimental results of the prototype. The results show that the performance of the drive circuit is obviously improved compared to typical constant voltage or constant duty cycle control method. The opening time, closing time, and the steady-state power consumption of solenoid are 10ms, 22ms and 0.3W respectively within a stroke of 2.5mm, which better meet the drive requirements of high-speed solenoid with low power consumption.
李勇, 黄庆林, 谷璐璐, 赵杨, 任燕. 一种双电压合成信号脉宽调制的低功耗高速电磁铁驱动电路[J]. 电工技术学报, 2019, 34(2): 255-266.
Li Yong, Huang Qinglin, Gu Lulu, Zhao Yang, Ren Yan. A High-Speed Solenoid Drive Circuit with Low Power Consumption Based on Pulse Width Modulation by Dual Voltage Synthesized. Transactions of China Electrotechnical Society, 2019, 34(2): 255-266.
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2019, Vol. 34 
