摘要
通过对异步电动机的数学模型的介绍,明确了异步电动机达到最大转矩所必须满足的条件。由于在传统的电压闭环控制方法下,励磁电压和转矩电压不能充分利用母线直流电压,因此提出了电压闭环检测法的改进方法,该方法将空间矢量脉宽调制(SVPWM)相邻向量作用时间作为进入弱磁控制的标志。通过MATLAB/Simulink实现了传统电压检测方式和改进方式的弱磁控制,仿真结果显示改进方式在转矩优化及速度响应上效果明显。
The requirement that the most torque on asynchronous motor could be met was known, through the introduction of the IM＇s mathematics model. Because on the conventional closed-loop voltage method, the field current and torque current could＇t use fully the DC voltage, the improved method which used the adjacent vector＇s action time as the sign to enter into field weakening was come up. The two methods could be accomplished through MATLAB/ Simulink, and the results indicated the effect on the torque and the speed response of improved method was better.
出处
《电机与控制应用》
北大核心
2013年第1期17-21,共5页
Electric machines & control application
关键词
异步电机
弱磁控制
转矩优化
asynchronous motor
field-weakening control
torque optimizing
