基于转子极性判断优化的脉振高频电压注入法

Pulse High-Frequency Voltage Injection Method Based on Rotor Polarity Judgment Optimization

在永磁同步电机零速和低速运行时,采用脉振高频注入法能够准确估计转子位置信息。针对脉振高频注入法无法实现转子极性判断,而传统极性判断方法存在响应时间长、采样和实施过程复杂以及极性误判等问题。文中提出了一种基于正负电压脉冲注入的电机转子极性判断方法。该方法给电机注入正负电压脉冲,并根据对应脉冲的响应电流峰值判断转子极性。脉振高频注入法将转子位置估计值和极性判断结果相结合,可得到准确的转子初始位置。文中通过Simulink仿真验证算法的有效性。仿真结果表明,所提转子极性判断方法能够简化采样方式和算法复杂性,降低判断转子极性的响应时间,使脉振高频注入法能够准确和快速地估计转子初始位置。

When the permanent magnet synchronous motor operates at zero speed and low speed,the rotor position information can be accurately estimated by the pulse high-frequency injection method.The pulse high frequency injection method can not realize the rotor polarity judgment,while the traditional polarity judgment method has problems such as long response time,complex sampling and implementation process,and even polarity misjudgment.In this study,a method of judging the rotor polarity based on positive and negative voltage pulse injection is proposed.This method injects positive and negative voltage pulses into the motor,and judges the rotor polarity according to the response current peak value of the corresponding pulse.The pulse high frequency injection method combines the rotor position estimation with the polarity judgment result to obtain the accurate initial position of the rotor.This study verifies the effectiveness of the algorithm through Simulink simulation.The simulation results show that the proposed rotor polarity determination method can simplify the sampling method and algorithm complexity,reduce the response time for determining rotor polarity,and enable the pulse high-frequency injection method to accurately and quickly estimate the initial position of the rotor.