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Conference Papers Year : 2021

A Composite Converter with Reduced Power Electronics for Electric Powertrain Applications

Abstract

This study proposes a composite converter for electric powertrain applications, which integrates the functionalities of a boost converter and a variable speed drive with reduced power electronic devices. By utilizing the neutral point of traction motor, the potential of zero-sequence circuit of traction drive is unlocked, thus enabling an equivalent boost and achieving internal dc/dc power conversion bidirectionally. Theoretical analysis and equivalent circuits are presented to explain the principle of the composite converter. A modified field-oriented control strategy with an augmented zero-sequence control-loop is proposed to regulate the dc-bus voltage and the traction motor simultaneously. Experimental validations are carried out on a 1.2 kW permanent magnet synchronous machine traction platform to verify the effectiveness. Compared to a classic two-stage converter, the total efficiency can be improved by 3.1-3.4% due to the reduced switching losses.
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Dates and versions

hal-03530943 , version 1 (17-01-2022)

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Xiaokang Zhang, Jean-Yves Gauthier, Xuefang Lin-Shi. A Composite Converter with Reduced Power Electronics for Electric Powertrain Applications. ECCE, Oct 2021, Vancouver, Canada. pp.1468-1475, ⟨10.1109/ECCE47101.2021.9595418⟩. ⟨hal-03530943⟩
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