Method of estimating initial rotor position for IPMSMs using subdivided voltage vectors based on inductance variation

Dae-Hyun Cho; Yeongsu Bak; Kyo-Beum Lee

Method of estimating initial rotor position for IPMSMs using subdivided voltage vectors based on inductance variation

Dae-Hyun Cho

Yeongsu Bak

Kyo-Beum Lee

Vol. 20, No. 5, pp. 1195-1205, Sep. 2020

10.1007/s43236-020-00108-5

Interior permanent-magnet synchronous motor

initial rotor position

Inductance variation

Subdivided voltage vectors

Abstract

This paper proposes a method for estimating the initial rotor position for an interior permanent-magnet synchronous motor (IPMSM) using subdivided voltage vectors based on inductance variation. Since the stator inductance of an IPMSM varies depending on the rotor position, the current that flows through the entire IPMSM drive system can be different depending on the rotor position when a voltage vector is applied to the stator winding of the IPMSM. Therefore, the rotor position can be estimated using the differences in the currents. In the conventional method, which uses six voltage vectors to estimate the initial rotor position, the estimated position error is increased in specific regions where the phase angle of the applied voltage vector is remarkably different from that of the N pole of the rotor. This paper presents an advanced method using subdivided voltage vectors to estimate the initial rotor position more precisely in a specific region. The effectiveness of the advanced estimation method is verified by simulation and experimental results.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

D. Cho, Y. Bak, K. Lee, "Method of estimating initial rotor position for IPMSMs using subdivided voltage vectors based on inductance variation," Journal of Power Electronics, vol. 20, no. 5, pp. 1195-1205, 2020. DOI: 10.1007/s43236-020-00108-5.

[ACM Style]

Dae-Hyun Cho, Yeongsu Bak, and Kyo-Beum Lee. 2020. Method of estimating initial rotor position for IPMSMs using subdivided voltage vectors based on inductance variation. Journal of Power Electronics, 20, 5, (2020), 1195-1205. DOI: 10.1007/s43236-020-00108-5.