高速电磁阀相移PWM电压驱动策略
Phase-shifted PWM voltage drive strategy of high-speed solenoid valve
陈晓明 1朱玉川 2李林飞 1王玉文1
作者信息
- 1. 南京航空航天大学机电学院,南京 210016
- 2. 南京航空航天大学机电学院,南京 210016;南京航空航天大学无锡研究院,无锡 214000
- 折叠
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.
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%.
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Key words
high-speed solenoid valve/pre-excitation/pre-unloading/phase-shifted PWM voltage drive strategy/controllable duty cycle引用本文复制引用
出版年
2025
国家科技期刊平台
NSTL
维普
万方数据