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2023-11-04
Sensorless Control of Interior Permanent Magnet Synchronous Motor with Triangular Transform Current Self-Demodulation in the Estimating d -q Axis
By
Progress In Electromagnetics Research B, Vol. 103, 75-99, 2023
Abstract
To address the issues of complex current demodulation, large rotor position estimation error, and position estimation error varying with speed in the high-frequency (HF) rotating voltage injection (HRVI) method for interior permanent magnet synchronous motor (IPMSM), a sensorless control of IPMSM with triangular transform (TT) current self-demodulation in the estimating d-q axis is proposed. Firstly, the HF currents estimated on the d and q axes are multiplied, and the resulting signal is constructed through TT to achieve phase shift compensation of positive and negative sequence HF currents. At the same time, a position error signal is constructed. Then, a low-pass filter is used to extract the position error signal and achieve self-demodulation of the current. The experimental results show that this method reduces the average position error by 15.0% under steady-state conditions and reduces the fluctuation range of position error by 17.6% under full load conditions.
Citation
Dingdou Wen, Xincheng Zhu, Zhun Cheng, Yanqin Zhang, and Wenting Zhang, "Sensorless Control of Interior Permanent Magnet Synchronous Motor with Triangular Transform Current Self-Demodulation in the Estimating d -q Axis," Progress In Electromagnetics Research B, Vol. 103, 75-99, 2023.
doi:10.2528/PIERB23070401
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