摘要
大功率异步牵引系统通常采用间接矢量控制,磁场定向易受转子电阻影响,且高速方波区采用标量控制。针对此问题,提出了一种分段转子磁场定向校正方法,即在非方波区采用不同坐标系下观测电磁转矩差异性去补偿转差频率;在方波区采用基于q轴电流误差补偿转差频率。其中,磁链观测采用BPF(带通滤波器)电压模型法,可消除采集电流直流偏置及初值误差。针对牵引控制系统双中断架构特点,提出了一种通过定时器中断中指令电压幅值及载波中断中实际电压角度重构电压的方法,提高电压重构准确度的同时易于工程化实现。最后,通过仿真和实验,验证了该方法可对转子电阻变化引起的磁场定向偏差实现全速域定向校正。
High power asynchronous traction systems typically use indirect vector control,where field orientation is easily affected by rotor resistance,and scalar control was used in the high-speed square wave region.A segmented rotor field orientation correction method was proposed to address this issue.Compensating for slip frequency by observing electromagnetic torque differences in different coordinate systems in the non square wave region.The square wave region compensates for slip frequency based on q-axis current error.The flux observation adopted voltage model method with BPF,which could eliminate the DC bias and initial value error of the collected current.A method for rebuilding voltage through the amplitude of instruction voltage in timer interrupts and the actual voltage angle in carrier interrupts was proposed based on the characteristics of the dual interrupt architecture in traction control systems,which improved the accuracy of voltage reconstruction and was easy to implement in engineering.Finally,through simulation and experiments,it was verified that this method can achieve full speed domain correction for field orientation deviation caused by changes in rotor resistance.
作者
何雄
HE Xiong(Beijing Urban Construction Design and Development Group Co.,LTD.,Beijing 100037,China)
出处
《微电机》
2024年第8期61-65,69,共6页
Micromotors
关键词
异步电机
间接矢量控制
磁链观测
全速域
转子磁场定向校正
asynchronous motor
indirect vector control
flux observation
full speed domain
rotor field orientation correction
