摘要
设计了一种脉宽调制型液压变压器,其由泵/马达流量单元和控制阀组组成,通过控制A、B两侧高速开关阀脉宽信号的占空比实现变压功能。介绍了脉宽调制型液压变压器的工作原理,通过理论推导和数学建模验证了其原理的可行性,并利用AMESim仿真软件对脉宽调制型液压变压器的变压过程进行仿真分析。脉宽调制型液压变压器控制灵活,调压范围大,可作为恒压网络系统中的二次调节元件驱动直线负载,还可回收负载端的压力能,对提高液压系统效率具有重要意义。
A pulse width modulation(PWM) type hydraulic transformer is designed in this study, which is composed of pump/motor flow measuring unit and control valve group. By controlling the duty ratio of pulse width signals of high-speed on-off valves on both sides of A and B, the pressure transformation function is realized. This paper introduces the working principle of PWM type hydraulic transformer, verifies the feasibility of its principle through theoretical derivation and mathematical modeling, and makes simulation analysis on the pressure transformation process of PWM type hydraulic transformer using AMESim simulation software.The PWM type hydraulic transformer has flexible control and wide range of pressure transformation. It may be used as a secondary regulating element in the hydraulic constant pressure network system to drive the linear load, and it may also recover the pressure energy at the load end, which is of great significance to improve the efficiency of the hydraulic system.
作者
刘涛
韩炎
李浩
赵丁选
LIU Tao;HAN Yan;LI Hao;ZHAO Dingxuan(School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,Hebei,China)
出处
《机械科学与技术》
CSCD
北大核心
2022年第11期1753-1758,共6页
Mechanical Science and Technology for Aerospace Engineering
基金
国家重点研发计划(2016YFC0802902)。
关键词
液压变压器
脉宽调制
高速开关阀
恒压网络
hydraulic transformer
pulse width modulation
high-speed on-off valve
constant pressure network
