摘要
针对电力机车牵引电机在方波控制方式下电机电压失去调节能力,造成传统的矢量控制算法失效的问题,采用一种基于电流开环控制的改进型矢量控制方案。在此基础上,针对牵引电机参数不准对改进型矢量控制性能的影响,包括转子时间常数估算误差与定向角度误差,电机磁链和实际输出转矩之间的关系,定向角度误差与电机实际d,q轴电压之间的关系以及电机互感估算误差对控制性能的影响等进行详细的理论分析,从而可以为研究方波下改进型矢量控制的磁场定向角度校正措施提供一定的参考依据。仿真和实验结果证明了理论分析的正确。
In order to solve the problem that traditional vector control can’t be used when traction motor in AC locomotive operates under square wave, a modified vector control special designed for square wave was adopted, in which open loop current control was used. Based on it, the influence of incorrect ma-chine parameters on the control performance was studied in detail, including the relationship between ro-tor time constant and estimated rotor flux angle, actual rotor flux amplitude, output torque, the relation-ship between rotor flux angle error and actual d/q-axis voltages and the influence of mismatched mutual inductance on control performance. These results can provide some theoretical basis for the correction strategy of field orientation in the modified vector control. Simulation and experimental results proves the validity of the analysis.
出处
《电机与控制学报》
EI
CSCD
北大核心
2014年第2期42-49,共8页
Electric Machines and Control
关键词
电力机车
异步电机
矢量控制
磁场定向
方波
electrical locomotive
induction machine
vector control
field orientation
square wave
