摘要
针对异步电机转子时间常数随温度和磁场饱和而变化,从而破坏定子电流励磁分量和转矩分量解耦条件,影响按转子磁链定向间接矢量控制系统动、静态性能的问题,提出了一种通过对比给定转矩角正切值与反馈转矩角正切值,并利用PI控制器来实时辨识异步电机转子时间常数的方法。对转矩角正切值与转子时间常数之间的关系进行了理论分析,推导了异步电机反馈的转矩角正切值计算公式,建立了MATLAB/Simulink环境下异步电机矢量控制系统的数学模型及基于转矩角正切值的转子时间常数辨识模型,并进行了仿真验证。仿真结果表明,这种基于计算转矩角正切值的异步电机转子时间常数辨识方法能够准确辨识出电机的实际转子时间常数,验证了该方法的正确性和可行性。
In view of the problem that rotor time constant of asynchronous motor vary with tempera-ture and magnetic field saturation so that broking the decoupling condition of excitation component and torque component of stator current and affecting dynamic and static performance in indirect rotor flux orientation vector control system, a new method of time constant identification based on compa-ring the tangent value of reference torque angle and the tangent value of feedback torque angle then by utilizing PI controller to identify the rotor time constant real-time is proposed. The relationship between the tangent torque and rotor time constant is analyzed while the calculation formula of feed-back torque angle tangent is deduced. Then a mathematical model of the vector control system of asynchronous motor and the model of the rotor time constant identification are established and simu-lated in MATLAB/Simulink environment. The simulation result shows that the rotor time constant identification method based on calculating the tangent value of torque angle can accurately identify the rotor time constant of the motor in pretty short time and verify the correctness and feasibility of the method.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2016年第5期1477-1484,共8页
Journal of Guangxi University（Natural Science Edition）
基金
山东省自然科学基金资助项目(ZR2015EM054)
山东省重点研发计划项目(2015GGX105009)
关键词
电动汽车
异步电机
矢量控制
转子时间常数辨识
仿真
electric vehicle
asynchronous motor
vector control
rotor time constant
simulation
作者简介
通讯作者：李军伟（1964-），男，河南平顶山人，山东理工大学教授，博士；E-mail：ljwhitt@163．com。
