基于转子极性判断优化的脉振高频电压注入法

doi:10.16180/j.cnki.issn1007-7820.2024.06.004

Abstract

Abstract:

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.

Key words: permanent magnet synchronous motor, sensorless control, pulse vibration high-frequency injection method, rotor polarity judgment, vector control, positive and negative voltage pulse injection, saliency effect, zero low speed

CLC Number:

TP273

CHEN Yibin, JIN Hai, XU Shen. Pulse High-Frequency Voltage Injection Method Based on Rotor Polarity Judgment Optimization[J].Electronic Science and Technology, 2024, 37(6): 29-35.

Figures/Tables 13

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

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