变转速泵控马达系统转速降落补偿试验研究  

Speed Loss Compensation Experiment Study in Variable-speed Pump-control-motor System

作　　者：彭天好[1] 乐南更[1] 

机构地区：[1]安徽理工大学机械工程学院,淮南232001

出　　处：《机械工程学报》2012年第4期175-181,共7页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(50875001)

摘　　要：分析变转速泵控马达调速系统产生转速降落的原因,指出系统泄漏、电动机机械特性和因系统压力变化带来的油液压缩性均能引起马达转速降落。给出基于系统压力反馈的转速降落补偿控制框图,推导出因系统泄漏和电动机机械特性引起转速降落的补偿系数和因油液压缩性引起转速降落的补偿系数。对变转速泵控马达调速系统,编制LabVIEW测控程序,在此基础上分别进行恒负载、变负载和变转速情况的转速降落补偿试验,由理论分析和试验结果得出了不同工况下的转速降落补偿方法,达到了在不同工况下变转速泵控马达调速系统转速降落补偿的目的。The reasons of motor speed loss in variable-speed pump-control-motor governing system are analyzed.It is pointed out that motor speed loss caused by system leakage,electromotor characteristic and oil compressibility due to system pressure change.The control diagram of motor speed loss compensation is given based on system pressure feedback.The speed loss compensation coefficient caused by system leakage and electromotor characteristic and the speed loss compensation coefficient caused by oil compressibility are derived.For the variable-speed pump-control-motor governing system,the measurement and control programs are built in LabVIEW.On this basis,the experiment studies are respectively carried out under constant load,variable load and variable-speed.The speed loss compensation method under different conditions is obtained based on theoretical analysis and experimental study,and it is achieved that the system can compensate motor speed loss under different conditions.

关 键 词：泵控马达 转速降落 分段线性补偿 油液压缩性补偿系数 

分 类 号：TH137[机械工程—机械制造及自动化]