摘要
虽然很多学者提出了各种定子磁场定向异步电机弱磁最大转矩控制策略,但是弱磁区域运行时电机特性的定量分析却很少有文献涉及。针对该问题,对弱磁区域运行的定子磁场定向控制异步电机特性进行了详细的定量分析。基于异步电机Г型等效电路,推导出弱磁运行区域一电机阻抗角的极小值和相应同步角频率,以及进入弱磁区域二的同步角频率及电机运行特征值。弱磁区域转折频率和最大转差值的仿真结果与理论值相比,误差不超过3%。搭建了试验平台,实现了弱磁运行区域的最大转矩输出。试验结果表明,电机内部变量的变化规律与理论分析一致,转折频率与理论值误差不超过5%,电压和电流幅值与理论极限值的误差不超过6%。
Although various field-weakening control strategy with maximum torque output for stator flux oriented induction motors are proposed,few quantitative analyses have been made on the operation characteristics in the field-weakening region.To solve this problem,the characteristics of stator field-oriented induction motor in field-weakening region were analyzed in detail.Based onГmodel equivalent circuit,the minimum impedance angle and the corresponding synchronous angular frequency were deduced in the first field-weakening region.Moreover,the analysis formula of the synchronous angular frequency from the first region to the second was given.And the characteristic value of motor operation was obtained.The simulation results of the turning frequency and the maximum slip is less than 3%compared with the theoretical values.A test platform was built to achieve the maximum torque output in the weak magnetic field.The experimental results show that the variation law of the internal variables of the motor is consistent with the theoretical analysis.Compared with the theoretical value,the error of the turning frequency is less than 5%and the error of the voltage and current amplitude is less than 6%.
作者
贺艳晖
HE Yanhui(CRRC Zhuzhou Electric Co,.Ltd.,Zhuzhou 412005,Hunan,China)
出处
《电气传动》
2021年第16期39-45,共7页
Electric Drive
关键词
定子磁场定向控制
弱磁控制
定量分析
最大转矩输出
stator flux-oriented control
field-weakening control
quantitative analyses
maximum torque output
