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摘要:
高速电磁阀作为数字流量技术的核心控制元件，其动态响应及有效可控占空比区间严重影响系统流量控制精度。为进一步扩展有效可控占空比区间，提出一种包含基准脉冲宽度调制(PWM)、预激励PWM、激励PWM、高频PWM、预卸荷PWM、卸荷PWM在内的相移PWM电压驱动策略，给出相移PWM电压驱动策略的工作原理，并建立高速电磁阀动态特性理论模型，开展预激励PWM、预卸荷PWM可控占空比仿真分析与实验验证研究。结果表明：所提策略与复合PWM电压驱动策略相比，阀芯开启、关闭压力响应时间分别缩小了87%、37.9%，工作频率为100 Hz，阀芯正常启闭可控占空比为0.285～0.77，自扩展至0.085～0.81。
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关键词:
- 高速电磁阀 /
- 预激励 /
- 预卸荷 /
- 相移PWM电压驱动策略 /
- 可控占空比
Abstract:High-speed solenoid valve is the core control element of digital flow technology, and its dynamic response and effective duty cycle range seriously affect the flow control accuracy of the system. To further expand the effective duty cycle range, a phase-shifted pulse width modulation (PWM) voltage drive strategy including reference PWM, pre-excitation PWM, excitation PWM, high-frequency PWM, pre-unloading PWM, and unloading PWM was proposed in this paper. Firstly, the working principle of the phase-shifted PWM voltage drive strategy was given, and the theoretical model of dynamic characteristics of high-speed solenoid valves was established. The simulation analysis and experimental verification of pre-excitation PWM and pre-unloading PWM duty cycle were carried out. The results show that compared with the composite PWM voltage drive strategy, the opening and closing pressure response time of the valve core are reduced by 87% and 37.9%, respectively. When the operating frequency is 100 Hz, the controllable duty cycle of the normal opening and closing of the valve core is extended from 28.5%–77% to 8.5%–81%.
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图 3 预激励可控占空比τp仿真分析结果
Figure 3. Simulation analysis results of pre-excitation controllable duty cycle τp
图 4 预卸荷可控占空比τc仿真分析结果
Figure 4. Simulation analysis results of pre-unloading controllable duty cycle τc
图 5 高速电磁阀动态特性测试平台
Figure 5. Test platform for dynamic characteristics of high-speed solenoid valve
图 6 高速电磁阀线圈电流、阀后压力响应
Figure 6. Coil current and downstream pressure response of high-speed solenoid valve
图 7 不同电压驱动策略下线圈电流、阀后压力响应对比
Figure 7. Coil current and downstream pressure response of high-speed solenoid valve
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[1] DONKOV V H, ANDERSEN T, LINJAMA M, et al. Digital hydraulic technology for linear actuation: A state of the art review[J]. International Journal of Fluid Power, 2020, 21(2): 263-304. [2] SHANG Y X, LI R J, WU S, et al. A research of high-precision pressure regulation algorithm based on ON/OFF valves for aircraft braking system[J]. IEEE Transactions on Industrial Electronics, 2022, 69(8): 7797-7806. doi: 10.1109/TIE.2021.3108705 [3] LEE I Y. Switching response improvement of a high speed on/off solenoid valve by using a 3 power source type valve driving circuit[C]// Proceedings of the IEEE International Conference on Industrial Technology. Piscataway: IEEE Press, 2006: 1823-1828. [4] MESSNER F, SCHEIDL R. Development of a dual supply H-bridge amplifier for high speed actuation of digital hydraulic switching valves[J]. International Journal of Fluid Power, 2019, 20(1): 125-150. [5] ZHAO J H, WANG M L, WANG Z J, et al. Different boost voltage effects on the dynamic response and energy losses of high-speed solenoid valves[J]. Applied Thermal Engineering, 2017, 123: 1494-1503. doi: 10.1016/j.applthermaleng.2017.05.117 [6] ZHAO J H, SHI Y, GREKHOV L, et al. Effects of structure parameters on the static electromagnetic characteristics of high speed solenoid valves[J]. International Journal of Applied Electromagnetics and Mechanics, 2017, 55(1): 45-60. doi: 10.3233/JAE-160129 [7] ZHAO J H, YUE P F, GREKHOV L, et al. Hold current effects on the power losses of high-speed solenoid valve for common-rail injector[J]. Applied Thermal Engineering, 2018, 128: 1579-1587. doi: 10.1016/j.applthermaleng.2017.09.123 [8] 孙晓, 栾盈盈, 孙柯, 等. 高速双线圈开关电磁阀控制策略研究[J]. 液压与气动, 2020(2): 175-182. doi: 10.11832/j.issn.1000-4858.2020.02.027SUN X, LUAN Y Y, SUN K, et al. Control strategy of high-speed on/off solenoid valve with double windings[J]. Chinese Hydraulics & Pneumatics, 2020(2): 175-182(in Chinese). doi: 10.11832/j.issn.1000-4858.2020.02.027 [9] 钟麒, 张斌, 洪昊岑, 等. 基于电流反馈的高速开关阀3电压激励控制策略[J]. 浙江大学学报(工学版), 2018, 52(1): 8-15. doi: 10.3785/j.issn.1008-973X.2018.01.002ZHONG Q, ZHANG B, HONG H C, et al. Three power sources excitation control strategy of high speed on/off valve based on current feedback[J]. Journal of Zhejiang University (Engineering Science), 2018, 52(1): 8-15(in Chinese). doi: 10.3785/j.issn.1008-973X.2018.01.002 [10] ZHONG Q, ZHANG B, YANG H Y, et al. Performance analysis of a high-speed on/off valve based on an intelligent pulse-width modulation control[J]. Advances in Mechanical Engineering, 2017, 9(11): 168781401773324. [11] GAO Q, ZHU Y C, LUO Z, et al. Investigation on adaptive pulse width modulation control for high speed on/off valve[J]. Journal of Mechanical Science and Technology, 2020, 34(4): 1711-1722. doi: 10.1007/s12206-020-0333-y [12] YUE D L, LI L F, WEI L J, et al. Effects of pulse voltage duration on open-close dynamic characteristics of solenoid screw-in cartridge valves[J]. Processes, 2021, 9(10): 1722. doi: 10.3390/pr9101722 [13] LIU Z G, LI L F, YUE D L, et al. Dynamic performance improvement of solenoid screw-in cartridge valve using a new hybrid voltage control[J]. Machines, 2022, 10(2): 106. doi: 10.3390/machines10020106 [14] ZHONG Q, WANG X L, XIE G, et al. Analysis of dynamic characteristics and power losses of high speed on/off valve with pre-existing control algorithm[J]. Energies, 2021, 14(16): 4901. doi: 10.3390/en14164901 [15] KIM S, MURRENHOFF H. Measurement of effective bulk modulus for hydraulic oil at low pressure[J]. Journal of Fluids Engineering, 2012, 134(2): 021201. doi: 10.1115/1.4005672 -
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