内置式永磁同步电动机弱磁控制的简化方法

针对直流侧母线电压对永磁电机扩速限制的问题,提出了一种基于电压坐标系的简化弱磁控制方法.由传统的基于电流坐标系的矢量控制转换到电压坐标系下进行分析,推导出电压坐标系下的转矩表达式,根据极限电压控制电流分量,得到相应的弱磁控制策略.理论分析和仿真实验表明该方法简化了计算过程,最大限度地利用直流侧电压,扩速范围更广,具有良好的动态响应.

Simplified Flux-weakening Control Method for Interior Permanent Magnet Synchronous Motors

To address the speed limit of Interior Permanent Magnet Synchronous Motors(IPMSM) due to DC bus voltage,a simplified flux-weakening control method based on voltage coordinate system was presented.The analysis of vector control based on current coordinate system is converted into voltage coordinate system,and the expression of torque based on voltage coordinate is derived.With weakening control strategy,the current components are controlled according to the limit voltage.Theoretical analysis and simulation results have shown that this method has such advantages as simple calculation,maximum efficiency of DC voltage,wider range of speed and good dynamic response.