LAPSE:2019.1383
Published Article
LAPSE:2019.1383
Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems
Ruikun Mai, Liwen Lu, Yong Li, Tianren Lin, Zhengyou He
December 10, 2019
Multiple inverters connected in parallel is a promising method to upgrade the power capacity of inductive power transfer (IPT) systems. Due to a slight unbalance of the control signals, the inner resistances of the inverters and other uncertainties, circulating currents exist among the parallel units which reduce the reliability of IPT systems. Firstly, the series-parallel resonant tank is employed in the multiple inverters based IPT system to eliminate the DC and harmonic circulating currents. The fundamental circulating currents in the paralleled inverter units are analyzed in detail. Then, for eliminating the fundamental circulating currents, a current decomposition method and a control diagram are proposed to avoid acquiring the phase of the current by detecting zero cross current point which increases the accuracy of the control algorithm. Finally, a 1-kW parallel-connected inverter IPT system is provided to verify the proposed approach. The experimental results show that the proposed method is effective for eliminating the fundamental circulating currents. The maximum efficiency of the system is up to 92.18% which is 0.53% higher compared to that without the current phasor control (91.65%).
Keywords
circulating currents, current phasor and voltage constant control, inductive power transfer (IPT), parallel-connected inverter
Suggested Citation
Mai R, Lu L, Li Y, Lin T, He Z. Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems. (2019). LAPSE:2019.1383
Author Affiliations
Mai R: State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China [ORCID]
Lu L: State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China
Li Y: State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China [ORCID]
Lin T: State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China
He Z: State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China
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Journal Name
Energies
Volume
10
Issue
3
Article Number
E261
Year
2017
Publication Date
2017-02-23
Published Version
ISSN
1996-1073
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PII: en10030261, Publication Type: Journal Article
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LAPSE:2019.1383
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doi:10.3390/en10030261
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Dec 10, 2019
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Dec 10, 2019
 
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Calvin Tsay
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