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Information 2017, 8(1), 11; doi:10.3390/info8010011

Four-Switch Three-Phase PMSM Converter with Output Voltage Balance and DC-Link Voltage Offset Suppression

1
National School of Applied Sciences, Mohammed First University, Oujda BP 669, 60000, Morocco
2
National School of Applied Sciences, Cadi Ayyad University, Marrakech BP 575, 40000, Morocco
*
Author to whom correspondence should be addressed.
Academic Editor: Willy Susilo
Received: 15 October 2016 / Revised: 9 January 2017 / Accepted: 12 January 2017 / Published: 17 January 2017
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Abstract

High power quality, efficiency, complexity, size, cost effectiveness and switching losses of the direct current to alternating current (DC–AC) conversion system are crucial aspects in industrial applications. Therefore, the four-switch three-phase inverter (4S3P) has been proposed as an innovative inverter design. However, this topology has been known to have many performance limitations in the low-frequency region, because of the generation of an unbalanced voltage leading to an unbalanced current due to the fluctuation and offset of the centre tap voltage of the DC-link capacitors. Those drawbacks are investigated and solved in this paper in order to provide pure sinusoidal output voltages. The generated output voltages are controlled using proportional-integral (PI) controllers to follow the desired voltages. Furthermore, the DC-link capacitor voltage offset is mitigated by subtracting the direct component from the control reference voltage using low pass filters, where this direct voltage component provides the direct current component which leads to DC-link capacitor voltage divergence. A simulation model and experimental setup are used to validate the proposed concept. Many simulation and experimental results are carried out to show the effectiveness of the proposed control scheme. View Full-Text
Keywords: four-switch three-phase inverter; inverter cost reduction; permanent magnet synchronous motor (PMSM); current unbalance; vector control four-switch three-phase inverter; inverter cost reduction; permanent magnet synchronous motor (PMSM); current unbalance; vector control
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hicham, F.; Yousfi, D.; Mohamed Larbi, E.; Youness, A.D. Four-Switch Three-Phase PMSM Converter with Output Voltage Balance and DC-Link Voltage Offset Suppression. Information 2017, 8, 11.

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