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http://dx.doi.org/10.7471/ikeee.2020.24.4.1004

Initial Rotor Polarity Detection of Single-phase Permanent Magnet Synchronous Motor Based on Virtual dq-axis  

Seo, Sung-Woo (Dept. of Electrical Engineering, Kyungnam University)
Hwang, Seon-Hwan (Dept. of Electrical Engineering, Kyungnam University)
Lee, Ki-Chang (Electric Machine and Drives Research Center, Korea Electrotechnology Research Institute)
Publication Information
Journal of IKEEE / v.24, no.4, 2020 , pp. 1004-1010 More about this Journal
Abstract
This paper proposes an initial rotor magnetic pole detection method for single-phase permanent magnet synchronous motors. The target motor cannot obtain position information based on the back emf in the low speed and stop state. Therefore, an open loop starting process is required, and in this process, initial rotor position information for low current and soft start is need. The proposed initial rotor magnetic pole detection algorithm considers the effect of asymmetric air- gap and magnetic flux. In addition, the high-frequency voltage signal injection and the offset voltage for accurate detection is used. As a result, the permanent magnet poles are is determined by acquiring the maximum value of the induced current using the virtual dq-axis.
Keywords
Single-phase permanent magnet synchronous motor; High frequency voltage signal; Rotor permanent magnet; Virtual dq-axis; Open-loop starting;
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