Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems
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 unit...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-02-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/10/3/261 |
| _version_ | 1811187272017510400 |
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| author | Ruikun Mai Liwen Lu Yong Li Tianren Lin Zhengyou He |
| author_facet | Ruikun Mai Liwen Lu Yong Li Tianren Lin Zhengyou He |
| author_sort | Ruikun Mai |
| collection | DOAJ |
| description | 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%). |
| first_indexed | 2024-04-11T13:59:26Z |
| format | Article |
| id | doaj.art-8e218e7e1fd54e8e99497dd0aaac275c |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T13:59:26Z |
| publishDate | 2017-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-8e218e7e1fd54e8e99497dd0aaac275c2022-12-22T04:20:10ZengMDPI AGEnergies1996-10732017-02-0110326110.3390/en10030261en10030261Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT SystemsRuikun Mai0Liwen Lu1Yong Li2Tianren Lin3Zhengyou He4State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, ChinaState Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, ChinaState Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, ChinaState Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, ChinaState Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, ChinaMultiple 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%).http://www.mdpi.com/1996-1073/10/3/261inductive power transfer (IPT)parallel-connected invertercirculating currentscurrent phasor and voltage constant control |
| spellingShingle | Ruikun Mai Liwen Lu Yong Li Tianren Lin Zhengyou He Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems Energies inductive power transfer (IPT) parallel-connected inverter circulating currents current phasor and voltage constant control |
| title | Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems |
| title_full | Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems |
| title_fullStr | Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems |
| title_full_unstemmed | Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems |
| title_short | Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems |
| title_sort | circulating current reduction strategy for parallel connected inverters based ipt systems |
| topic | inductive power transfer (IPT) parallel-connected inverter circulating currents current phasor and voltage constant control |
| url | http://www.mdpi.com/1996-1073/10/3/261 |
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