Variable-Angle Random High-Frequency Voltage Injection Strategy with Cross-Saturation Effect Compensation for Sensorless Synchronous Reluctance Motor Drives

Liangnian Lv, Ziming Hu, Sisi Li, Rui Guo, Jinpeng Wang (), Gaolin Wang and Shulin Li
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Liangnian Lv: Goldwind Science & Technology Co., Ltd., No. 8 Boxing 1st Road, Economic & Technological Development District, Beijing 100176, China
Ziming Hu: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Sisi Li: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Rui Guo: Goldwind Science & Technology Co., Ltd., No. 8 Boxing 1st Road, Economic & Technological Development District, Beijing 100176, China
Jinpeng Wang: Goldwind Science & Technology Co., Ltd., No. 8 Boxing 1st Road, Economic & Technological Development District, Beijing 100176, China
Gaolin Wang: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Shulin Li: Goldwind Science & Technology Co., Ltd., No. 8 Boxing 1st Road, Economic & Technological Development District, Beijing 100176, China

Energies, 2024, vol. 17, issue 3, 1-17

Abstract: There are usually noise problems when the position sensorless control of a synchronous reluctance motor (SynRM) is carried out by high-frequency (HF) signal injection method. Due to the special structure, the cross-saturation effect of the SynRM is particularly serious, resulting in reduced position observation accuracy. In this paper, a variable-angle random HF voltage injection strategy with cross-saturation effect compensation is proposed for position sensorless SynRM drives. Random number generation based on the chaotic mapping method is used to generate random HF voltage signals with different frequencies for injection; the current power spectral density (PSD) distribution is extended and the HF noise can be reduced. A control strategy based on variable-angle square-wave injection is proposed to suppress the cross-saturation effect. By measuring the position error curves of different loads off-line and polynomial fitting the curves, the position error is achieved by combining with the corresponding signal demodulation algorithm. The proposed method does not require additional hardware resources and can maintain high control accuracy and robustness. Finally, the effectiveness of the proposed sensorless control strategy is verified on a 3 kW SynRM experimental platform.

Keywords: synchronous reluctance motor; random HF voltage injection; variable-angle square-wave injection; cross-saturation effect compensation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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