Sensorless drive of surface-mounted permanent-magnet motor by high-frequency signal injection based on magnetic saliency

被引:386
作者
Jang, JH [1 ]
Sul, SK
Ha, JI
Ide, K
Sawamura, M
机构
[1] Seoul Natl Univ, Sch Elect Engn & Comp Sci, Seoul 151744, South Korea
[2] Samsung Elect Co, Mechatron Ctr, Suwon 442742, South Korea
[3] Yaskawa Elect Co, Corp R&D Ctr, Mechatron R&D Ctr, Kitakyushu, Fukuoka 8038530, Japan
关键词
high-frequency signal injection; sensorless drive; surface-mounted permanent-magnet (SMPM) motor;
D O I
10.1109/TIA.2003.813734
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper presents a new sensorless control scheme of a surface-mounted permanent-magnet (SMPM) motor using high-frequency voltage signal injection method based on the high-frequency impedance difference. In the SMPM motor, due to the flux of the permanent magnet, the stator core around the q-axis winding is saturated. This makes the magnetic saliency in the motor. This magnetic saliency has the information about the rotor position. The high-frequency voltage signal is injected into the motor in order to detect the magnetic saliency and estimate the rotor position. In this paper, the relationship between the high-frequency voltages and high-frequency currents is developed using the voltage equations at the high frequency, and the high-frequency impedance characteristics are analyzed experimentally under various conditions. The proposed sensorless control scheme makes it possible to drive the SMPM motor in the low-speed region including zero speed, even under heavy load conditions. The experimental results verify the performance of the proposed sensorless algorithm.
引用
收藏
页码:1031 / 1039
页数:9
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