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Analysis of inductance according to the applied current in Spoke type PMSM and suggestion of driving mode

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Abstract

The spoke-type permanent magnet synchronous motor (PMSM) is a motor built using nonrare earth elements, which feature low flux density. It has a flux concentrated structure of permanent magnet arrangement to improve power density. Further, the torque in the spoke-type PMSM is composed of a magnetic torque component from the permanent magnets and a reluctance torque arising from the inductance difference between the d- and q-axis. This paper analyzed the d- and q-axes inductances that affect the reluctance torque depending on the magnitude of the applied current and the current phase angle of the spoke-type PMSM at base speed. We also derived the variation of the d- and q-axis inductances, which is shown at the operation speed region. Accordingly, the variation of the current phase angle for generating the maximum output power is analyzed. Based on the above results, we predicted the variation in the driving mode of the spoke-type PMSM, and subsequently verified the prediction experimentally.This work was supported in part by the National Research Foundation of Korea grant funded by the Korea government (2016R1A2A1A05005392), and in part by the Human Resources Program in Energy Technology of the Korea Institute of Energy Technology Evaluation and Planning, granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea. (20154030200900

Topics: Field weakening (FW), inductance, nonrare earth, spoke-type permanent magnet synchronous motor, PMSM
Publisher: IEEE
Year: 2016
DOI identifier: 10.1109/TMAG.2017.2662719
OAI identifier: oai:repository.hanyang.ac.kr:20.500.11754/101022
Provided by: HANYANG Repository
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