High‑frequency response current direct demodulation method for sensorless control of interior permanent magnet synchronous motor drives

Wenzhen Li; Jinglin Liu; Chao Gong

High‑frequency response current direct demodulation method for sensorless control of interior permanent magnet synchronous motor drives

Wenzhen Li

Jinglin Liu

Chao Gong

Vol. 22, No. 5, pp. 784-795, May 2022

10.1007/s43236-022-00401-5

Interior Permanent Magnet Synchronous Motor (IPMSM)

Stationary reference frame (SRF)

Sensorless control

High-frequency (HF) carrier-signal injection

Abstract

Sensorless schemes are mainly used in fault-tolerant control of interior permanent magnet synchronous motor (IPMSM) drives. Traditional sensorless methods with injection of high-frequency (HF) carrier signals into the stationary reference frame have a stable performance. However, phase shifts caused by conventional high-pass filters (HPFs) decrease the estimation accuracy. Besides, the demodulation process is usually complicated, which increases the difficulty of application. To solve these problems, this study presents an HF-induced current direct demodulation method. Rotor position angle can be solved from the sampled currents at adjacent moments without demodulation signals. Therefore, the errors related to filters in the rotor position estimation are eliminated. Besides, the efficiency of the demodulation algorithm is improved. Furthermore, an online compensation method for cross-saturation effect is proposed. Experimental results verify that the proposed strategy can obtain an accurate rotor position with good steady-state and dynamic performance.

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Cite this article

[IEEE Style]

W. Li, J. Liu, C. Gong, "High‑frequency response current direct demodulation method for sensorless control of interior permanent magnet synchronous motor drives," Journal of Power Electronics, vol. 22, no. 5, pp. 784-795, 2022. DOI: 10.1007/s43236-022-00401-5.

[ACM Style]

Wenzhen Li, Jinglin Liu, and Chao Gong. 2022. High‑frequency response current direct demodulation method for sensorless control of interior permanent magnet synchronous motor drives. Journal of Power Electronics, 22, 5, (2022), 784-795. DOI: 10.1007/s43236-022-00401-5.