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Article

Research on Phase Current Reconstruction for DPWM2 of Induction Motor Drive System Based on DC-Link Current Sampling

by
Pengyun Song
1,2,
Huazhang Wang
1,
Junyi Zhang
1,
Yanghui Liu
1,* and
Tao Deng
1,2
1
College of Electrical Engineering, Southwest Minzu University, Chengdu 610225, China
2
Institute of National Productivity Development, Southwest Minzu University, Chengdu 610225, China
*
Author to whom correspondence should be addressed.
Machines 2022, 10(11), 1104; https://doi.org/10.3390/machines10111104
Submission received: 26 October 2022 / Revised: 10 November 2022 / Accepted: 13 November 2022 / Published: 21 November 2022
(This article belongs to the Section Electromechanical Energy Conversion Systems)
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Abstract

In order to reduce the switching loss and cost, as well as improve the reliability of the induction motor (IM) drive system, the technology involving the three-phase current reconstruction of 60° discontinuous pulse width modulation (DPWM2) is studied in this paper. According to the analysis of the switching state for DPWM2 in different sectors, the three-phase current can be constructed by sampling the voltage of the DC-link resistor. When the target voltage vector is located near the sector boundary or in the low-modulation area, the duration of the active vector in the sampling period is less than the voltage sampling time, which leads to measurement errors of the DC-link current. Therefore, on the basis of the switching state in different unmeasured areas, a time compensation method combining phase shifting and frequency reduction is proposed, and the expressions for comparing values are derived. Lastly, a simulation model and an experimental platform are established to validate the accuracy of the proposed method.
Keywords: discontinuous pulse width modulation (DPWM); DC-link current sampling; three-phase current reconstruction; time compensation; phase shifting discontinuous pulse width modulation (DPWM); DC-link current sampling; three-phase current reconstruction; time compensation; phase shifting

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MDPI and ACS Style

Song, P.; Wang, H.; Zhang, J.; Liu, Y.; Deng, T. Research on Phase Current Reconstruction for DPWM2 of Induction Motor Drive System Based on DC-Link Current Sampling. Machines 2022, 10, 1104. https://doi.org/10.3390/machines10111104

AMA Style

Song P, Wang H, Zhang J, Liu Y, Deng T. Research on Phase Current Reconstruction for DPWM2 of Induction Motor Drive System Based on DC-Link Current Sampling. Machines. 2022; 10(11):1104. https://doi.org/10.3390/machines10111104

Chicago/Turabian Style

Song, Pengyun, Huazhang Wang, Junyi Zhang, Yanghui Liu, and Tao Deng. 2022. "Research on Phase Current Reconstruction for DPWM2 of Induction Motor Drive System Based on DC-Link Current Sampling" Machines 10, no. 11: 1104. https://doi.org/10.3390/machines10111104

APA Style

Song, P., Wang, H., Zhang, J., Liu, Y., & Deng, T. (2022). Research on Phase Current Reconstruction for DPWM2 of Induction Motor Drive System Based on DC-Link Current Sampling. Machines, 10(11), 1104. https://doi.org/10.3390/machines10111104

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