Rotor Initial Position Detection of Permanent Magnet Synchronous Motor

2018 ◽  
Vol 06 (02) ◽  
pp. 172-183
Author(s):  
盛军 温
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Initial Position ◽  
Position Detection

scholarly journals A New Open Loop Approach for Identifying the Initial Rotor Position of a Permanent Magnet Synchronous Motor

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Qixin Zhu ◽  
Lei Xiong ◽  
Hongli Liu ◽  
Yonghong Zhu ◽  
Guoping Zhang
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Constant Load ◽  
Synchronous Motor ◽  
Initial Position ◽  
Open Loop ◽  
Rotor Position ◽  
Position Detection ◽  
Incremental Encoder ◽  
Fft Algorithms

The precision of initial rotor position detection is critical for the start and running performance of permanent magnet synchronous motor (PMSM). This work describes a new open loop approach for identifying the initial position of a PMSM with an incremental encoder, even when a constant load torque is being applied. By giving a testing current with high frequency to the stator winding, the initial rotor position of a PMSM can be detected with reasonable accuracy. The rotor almost does not move during the process of identification. The FFT algorithms are used to remove the phase bias effects in identification. Our approach is quicker and simpler than the conventional approaches.

Research on Automatic Detection Method about Rotor Initial Position of Permanent Magnet Synchronous Motor

2013 ◽  
Vol 313-314 ◽  
pp. 31-36
Author(s):  
Bao Li ◽  
Guang Xu Zhou
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Automatic Detection ◽  
Simple Calculation ◽  
Synchronous Motor ◽  
Initial Position ◽  
Detection Accuracy ◽  
Rotor Position ◽  
Position Signal ◽  
Park Transformation

ts required to real-time detect rotor position for vector control of permanent magnet synchronous motor, the difference is initial rotor position angle between the output position signal of absolute rotary transformer and the position signal for park transformation, then it is necessary to get the initial position of the motor before the motor starts. Based on the characteristics of permanent magnet synchronous motor, a certain method about automatic detection of the initial position of a rotor is obtained. Compared with other methods, there are advantages such as simple calculation, small impact by the external and high detection accuracy. At last, the correctness of the method is verified by theory and experiment.

A rotor initial position estimation method for sensorless field-oriented control of permanent magnet synchronous motor

2018 ◽  
Vol 40 (15) ◽  
pp. 4198-4207 ◽  
Author(s):  
Oussama Saadaoui ◽  
Amor Khlaief ◽  
Moez Abassi ◽  
Abdelkader Chaari ◽  
Mohamed Boussak
Keyword(s):  
Permanent Magnet ◽  
Pulse Sequence ◽  
Permanent Magnet Synchronous Motor ◽  
Estimation Method ◽  
Synchronous Motor ◽  
Position Estimation ◽  
Field Oriented Control ◽  
Low Speed ◽  
Rotor Position ◽  
Position Detection

In this paper, a new technique to improve initial rotor position detection at standstill of a permanent magnet synchronous motor (PMSM) is presented. Sensorless field-oriented control (FOC) of a PMSM at low speed remains a difficult task. In order to estimate the position and rotor speed, we proposed a novel structure of a full-order sliding mode observer (FO-SMO) in a sensorless FOC. At standstill, we used a voltage pulse sequence applied to the windings in order to detect the initial rotor position. With this technique, we managed to minimize the error on the estimated rotor position to 3.75° (electrical) compared with others. The validity of the proposed approach with a 1.1-kW low-speed PMSM sensorless FOC has been proved by experimental results.

scholarly journals Initial Rotor Position Detection for Permanent Magnet Synchronous Motor Based on High-Frequency Voltage Injection without Filter

2020 ◽  
Vol 11 (4) ◽  
pp. 71
Author(s):  
Zhiqiang Wang ◽  
Bo Yao ◽  
Liyan Guo ◽  
Xuefeng Jin ◽  
Xinmin Li ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
High Frequency ◽  
Permanent Magnet Synchronous Motor ◽  
Position Angle ◽  
Synchronous Motor ◽  
Current Response ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Rotor Position ◽  
Position Detection

The accurate initial rotor position of a permanent magnet synchronous motor (PMSM) is necessary for starting the motor, and for the position sensorless control method adopted by a PMSM control system under some working conditions. This paper presents a new method to detect the initial rotor position of a permanent magnet synchronous motor (PMSM). The method does not need a low-pass filter, and has strong robustness and a simple calculation method. According to the relationship between high-frequency current response and rotor position angle θ, the rotor position angle can be obtained by arctangent and linear formulae. Finally, the magnetic polarity of the rotor is distinguished according to the change of inductance. In this method, the arctangent function is used to eliminate the filtering process and reduce the influence of the parameter deviation of the motor system on the detection accuracy of the initial position. The experimental results verify the correctness of the theoretical analysis and the effectiveness of the method.

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