Capacitive Power Transfer System with Reduced Voltage Stress and Sensitivity
This paper introduces a DC–DC buck converter on the secondary side of the capacitive power transfer system to reduce the voltage and electric field across the interface, and to reduce the circuit Q, and thus the system sensitivity. The system is mathematically analyzed to study the improve...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-07-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/8/7/1131 |
| _version_ | 1818863901766320128 |
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| author | Tarek M. Mostafa Dai Bui Aam Muharam Reiji Hattori Aiguo Patrick Hu |
| author_facet | Tarek M. Mostafa Dai Bui Aam Muharam Reiji Hattori Aiguo Patrick Hu |
| author_sort | Tarek M. Mostafa |
| collection | DOAJ |
| description | This paper introduces a DC–DC buck converter on the secondary side of the capacitive power transfer system to reduce the voltage and electric field across the interface, and to reduce the circuit Q, and thus the system sensitivity. The system is mathematically analyzed to study the improvement in sensitivity and voltage stress. The leakage electric field emissions around the plates are investigated by simulation. The analytical and simulation results show that by reducing the duty cycle of the buck converter at a constant output power, the voltage across the plates can be significantly reduced and the circuit becomes less sensitive to the variations in parameters. Experimental results demonstrated that Q and the voltage stress over the capacitive interface are reduced by changing the duty cycle of the buck converter. For delivering 10 W of power, the maximum voltage stress across one pair of the coupling plates is reduced from 211 V in the conventional system without using a DC–DC converter, to 65 V and 44 V at duty cycles of 30% and 20%, respectively. The system achieves an end-to-end power efficiency of 80% at an output power of 10 W and a duty cycle of 30%. |
| first_indexed | 2024-12-19T10:23:08Z |
| format | Article |
| id | doaj.art-d13c69a964944ab3875f483940e374da |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-19T10:23:08Z |
| publishDate | 2018-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-d13c69a964944ab3875f483940e374da2022-12-21T20:26:00ZengMDPI AGApplied Sciences2076-34172018-07-0187113110.3390/app8071131app8071131Capacitive Power Transfer System with Reduced Voltage Stress and SensitivityTarek M. Mostafa0Dai Bui1Aam Muharam2Reiji Hattori3Aiguo Patrick Hu4ASEM, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, JapanDepartment of Electrical and Computer Engineering, The University of Auckland, Auckland 1023, New ZealandASEM, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, JapanASEM, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, JapanDepartment of Electrical and Computer Engineering, The University of Auckland, Auckland 1023, New ZealandThis paper introduces a DC–DC buck converter on the secondary side of the capacitive power transfer system to reduce the voltage and electric field across the interface, and to reduce the circuit Q, and thus the system sensitivity. The system is mathematically analyzed to study the improvement in sensitivity and voltage stress. The leakage electric field emissions around the plates are investigated by simulation. The analytical and simulation results show that by reducing the duty cycle of the buck converter at a constant output power, the voltage across the plates can be significantly reduced and the circuit becomes less sensitive to the variations in parameters. Experimental results demonstrated that Q and the voltage stress over the capacitive interface are reduced by changing the duty cycle of the buck converter. For delivering 10 W of power, the maximum voltage stress across one pair of the coupling plates is reduced from 211 V in the conventional system without using a DC–DC converter, to 65 V and 44 V at duty cycles of 30% and 20%, respectively. The system achieves an end-to-end power efficiency of 80% at an output power of 10 W and a duty cycle of 30%.http://www.mdpi.com/2076-3417/8/7/1131capacitive wireless power transferDC–DC buck converterquality factorvoltage stresswireless power transmission |
| spellingShingle | Tarek M. Mostafa Dai Bui Aam Muharam Reiji Hattori Aiguo Patrick Hu Capacitive Power Transfer System with Reduced Voltage Stress and Sensitivity Applied Sciences capacitive wireless power transfer DC–DC buck converter quality factor voltage stress wireless power transmission |
| title | Capacitive Power Transfer System with Reduced Voltage Stress and Sensitivity |
| title_full | Capacitive Power Transfer System with Reduced Voltage Stress and Sensitivity |
| title_fullStr | Capacitive Power Transfer System with Reduced Voltage Stress and Sensitivity |
| title_full_unstemmed | Capacitive Power Transfer System with Reduced Voltage Stress and Sensitivity |
| title_short | Capacitive Power Transfer System with Reduced Voltage Stress and Sensitivity |
| title_sort | capacitive power transfer system with reduced voltage stress and sensitivity |
| topic | capacitive wireless power transfer DC–DC buck converter quality factor voltage stress wireless power transmission |
| url | http://www.mdpi.com/2076-3417/8/7/1131 |
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