circulating current reduction strategy for parallel-connected inverters based ipt systems
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2017
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Abstract
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%).
| Reference Key |
mai2017energiescirculating
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|---|---|
| Authors | ;Ruikun Mai;Liwen Lu;Yong Li;Tianren Lin;Zhengyou He |
| Journal | acs combinatorial science |
| Year | 2017 |
| DOI |
10.3390/en10030261
|
| URL | |
| Keywords | Keywords not found |
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