两种变转速电机驱动恒压泵动态及能效特性研究  

Research on Dynamic and Energy Efficiency Characteristics of Constant Pressure Pump Driven by Two Kinds of Variable Speed Motor

作　　者：闫政 YAN Zheng(Mechanical Department,Jinzhong University,Jinzhong Shanxi 030619,China)

机构地区：[1]晋中学院机械工程系,山西晋中030619

出　　处：《机床与液压》2023年第6期36-40,共5页Machine Tool & Hydraulics

基　　金：山西省面上基金项目(201901D111300);晋中市重点研发计划项目(Y211020);中央引导地方科技发展资金项目(YDZJSX2022C030)。

摘　　要：为了提高电液动力源响应速度、降低能耗,设计变转速驱动恒压泵组成新型的电液动力源。针对不同工况分别采用变频器驱动三相交流电机和伺服电机两种方式驱动恒压泵,通过对构建的电液动力源原理、动态响应理论分析及试验验证,表明变频器驱动交流电机动态响应差,伺服电机驱动动态响应时间不超过0.1 s。进一步对两种变转速驱动进行能耗分析,试验结果表明两种电液动力源能效随着负载压力和转速的升高而增大,当负载压力达到20 MPa、转速提升到1500 r/min,变频异步电机驱动的液压系统能效为0.74,伺服电机驱动的液压系统能效为0.8。In order to improve the response velocity and reduce the energy consumption of the electro-hydraulic power source,a new type of electro-hydraulic power source composed of variable speed driving constant pressure pump was designed.According to different working conditions,the constant pressure pump was driven by frequency converter driving three-phase AC motor and servo motor respectively.Through the principle of electro-hydraulic power source,dynamic response theoretical analysis and experimental verification,it is showen that the dynamic response of frequency converter driving AC motor is poor,and the dynamic response time of servo motor driving is not more than 0.1 s.The energy consumption of the two variable speed drives was further analyzed.The test shows that the energy efficiency of the two electro-hydraulic power sources increases with the increase of load pressure and speed;when the load pressure reaches 20 MPa and the speed increases to 1500 r/min,the energy efficiency of the hydraulic system driven by variable frequency asynchronous motor is 0.74 and that of the hydraulic system driven by servo motor is 0.8.

关 键 词：变频控制 伺服控制 动态响应 能效 

分 类 号：TH3[机械工程—机械制造及自动化]