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Energies 2016, 9(10), 853; doi:10.3390/en9100853

A Phase Current Reconstruction Approach for Three-Phase Permanent-Magnet Synchronous Motor Drive

School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
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Author to whom correspondence should be addressed.
Academic Editor: K.T. Chau
Received: 10 July 2016 / Revised: 23 September 2016 / Accepted: 14 October 2016 / Published: 21 October 2016
(This article belongs to the Special Issue Electric Machines and Drives for Renewable Energy Harvesting)
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Abstract

Three-phase permanent-magnet synchronous motors (PMSMs) are widely used in renewable energy applications such as wind power generation, tidal energy and electric vehicles owing to their merits such as high efficiency, high precision and high reliability. To reduce the cost and volume of the drive system, techniques of reconstructing three-phase current using a single current sensor have been reported for three-phase alternating current (AC) control system using the power converts. In existing studies, the reconstruction precision is largely influenced by reconstructing dead zones on the Space Vector Pulse Width Modulation (SVPWM) plane, which requires other algorithms to compensate either by modifying PWM modulation or by phase-shifting of the PWM signal. In this paper, a novel extended phase current reconstruction approach for PMSM drive is proposed. Six novel installation positions are obtained by analyzing the sampling results of the current paths between each two power switches. By arranging the single current sensor at these positions, the single current sensor is sampled during zero voltage vectors (ZVV) without modifying the PWM signals. This proposed method can reconstruct the three-phase currents without any complex algorithms and is available in the sector boundary region and low modulation region. Finally, this method is validated by experiments. View Full-Text
Keywords: phase current reconstruction; single current sensor; permanent-magnet synchronous motor (PMSM); motor drive phase current reconstruction; single current sensor; permanent-magnet synchronous motor (PMSM); motor drive
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Yan, H.; Xu, Y.; Zou, J. A Phase Current Reconstruction Approach for Three-Phase Permanent-Magnet Synchronous Motor Drive. Energies 2016, 9, 853.

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