Initial Rotor Position Detection Method of SPMSM Based on High Frequency Current Injection Method

doi:10.11985/2017.04.008

Abstract

Abstract:

In the paper, the high frequency sinusoidal current injection method is used to detect the initial rotor position. When a high frequency current is injected into d-axis, the saturation of magnetic field in d-axis can lead to high frequency voltage response. A detailed analysis on the convergence of initial rotor position is given. To solve the problems such as rotor jitter, long testing time, which is introduced by the traditional method of injecting negative and positive pulse voltage, a new polarity detection is proposed. A signal injection cycle is divided into four interval and the d-axis direction is determined by the sign of the integral value of high frequency voltage response in interval of I and III. This method does not need additional injection of positive and negative pulse signal to determine d-axis direction, shortens the time estimates, simplifies the estimation process, avoids the rotor small vibration problem when injecting positive and negative pulse voltage. The theory analysis, simulation and experimental results validate the effectives of the method.

Key words: Surfue-mounted permanent-magnet synchronous machines, high frequency current injection, magnetic polarity detection, initial rotor position estimation

CLC Number:

TM351

Chen Jiansong,Bai Wenjie,Zhou Rong,Liu Lidong,Liu Bing,Wei Jiadan. Initial Rotor Position Detection Method of SPMSM Based on High Frequency Current Injection Method[J]. Journal of Electrical Engineering, 2017, 12(4): 45-50.

Figures/Tables 8

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References 12

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参数名称	数值	参数名称	数值
额定电压U_N/V	300	每极磁通量Φ /Wb	0.106 3
额定功率P_N/W	400	转动惯量J/g·m²	0.040 2
额定转速n_N/rpm	6 000	每相电阻R_s/Ω	3.2
额定电流I_N/A	2.1	直轴电感L_d/mH	8
极对数P_n	2	交轴电感L_q/mH	8

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