A 120 W Class-E Power Module with an Adaptive Power Combiner for a 6.78 MHz Wireless Power Transfer System
In this article, a highly efficient power module is presented with two class-E power amplifiers and an adaptive power combiner for transmitting output powers >100 W at 6.78 MHz in a wireless power transfer system. The losses caused by the combiners and interstage matching circuits or mismatch...
| প্রধান লেখক: | , |
|---|---|
| বিন্যাস: | প্রবন্ধ |
| ভাষা: | English |
| প্রকাশিত: |
MDPI AG
2018-08-01
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| মালা: | Energies |
| বিষয়গুলি: | |
| অনলাইন ব্যবহার করুন: | http://www.mdpi.com/1996-1073/11/8/2083 |
| _version_ | 1828389796567842816 |
|---|---|
| author | Ui-Gyu Choi Jong-Ryul Yang |
| author_facet | Ui-Gyu Choi Jong-Ryul Yang |
| author_sort | Ui-Gyu Choi |
| collection | DOAJ |
| description | In this article, a highly efficient power module is presented with two class-E power amplifiers and an adaptive power combiner for transmitting output powers >100 W at 6.78 MHz in a wireless power transfer system. The losses caused by the combiners and interstage matching circuits or mismatching between the amplifier, and the combiners can significantly reduce the overall efficiency of the power module. To achieve an efficient combination of the output amplifier signals, the adaptive power combiner is proposed based on the consideration of the optimum load impedance characteristics of the power amplifiers. The input impedance of the combiner is designed using series capacitors and resistors between the two input ports of the combiner and the two output signals of the class-E amplifiers at the optimum load condition. The output performances of the proposed module can decrease based on the component mismatch between the two power amplifiers. The proposed power module was implemented on an FR4 PCB, with a 15 mm metal heat sink, and demonstrated an output power of 123.3 W, a power-added efficiency of 85.7%, and a power gain of 25.6 dB at 6.78 MHz. The second harmonic suppression of the module was 37 dBc. |
| first_indexed | 2024-12-10T06:33:57Z |
| format | Article |
| id | doaj.art-4e91cdf0fce8447ab437336e21ba21a5 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-12-10T06:33:57Z |
| publishDate | 2018-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-4e91cdf0fce8447ab437336e21ba21a52022-12-22T01:58:59ZengMDPI AGEnergies1996-10732018-08-01118208310.3390/en11082083en11082083A 120 W Class-E Power Module with an Adaptive Power Combiner for a 6.78 MHz Wireless Power Transfer SystemUi-Gyu Choi0Jong-Ryul Yang1Department of Electronic Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan 38541, Gyeongbuk, KoreaDepartment of Electronic Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan 38541, Gyeongbuk, KoreaIn this article, a highly efficient power module is presented with two class-E power amplifiers and an adaptive power combiner for transmitting output powers >100 W at 6.78 MHz in a wireless power transfer system. The losses caused by the combiners and interstage matching circuits or mismatching between the amplifier, and the combiners can significantly reduce the overall efficiency of the power module. To achieve an efficient combination of the output amplifier signals, the adaptive power combiner is proposed based on the consideration of the optimum load impedance characteristics of the power amplifiers. The input impedance of the combiner is designed using series capacitors and resistors between the two input ports of the combiner and the two output signals of the class-E amplifiers at the optimum load condition. The output performances of the proposed module can decrease based on the component mismatch between the two power amplifiers. The proposed power module was implemented on an FR4 PCB, with a 15 mm metal heat sink, and demonstrated an output power of 123.3 W, a power-added efficiency of 85.7%, and a power gain of 25.6 dB at 6.78 MHz. The second harmonic suppression of the module was 37 dBc.http://www.mdpi.com/1996-1073/11/8/2083adaptive power combinerclass-E power amplifierhigh efficiencyoptimum load conditionimpedance translationwireless power transfer system |
| spellingShingle | Ui-Gyu Choi Jong-Ryul Yang A 120 W Class-E Power Module with an Adaptive Power Combiner for a 6.78 MHz Wireless Power Transfer System Energies adaptive power combiner class-E power amplifier high efficiency optimum load condition impedance translation wireless power transfer system |
| title | A 120 W Class-E Power Module with an Adaptive Power Combiner for a 6.78 MHz Wireless Power Transfer System |
| title_full | A 120 W Class-E Power Module with an Adaptive Power Combiner for a 6.78 MHz Wireless Power Transfer System |
| title_fullStr | A 120 W Class-E Power Module with an Adaptive Power Combiner for a 6.78 MHz Wireless Power Transfer System |
| title_full_unstemmed | A 120 W Class-E Power Module with an Adaptive Power Combiner for a 6.78 MHz Wireless Power Transfer System |
| title_short | A 120 W Class-E Power Module with an Adaptive Power Combiner for a 6.78 MHz Wireless Power Transfer System |
| title_sort | 120 w class e power module with an adaptive power combiner for a 6 78 mhz wireless power transfer system |
| topic | adaptive power combiner class-E power amplifier high efficiency optimum load condition impedance translation wireless power transfer system |
| url | http://www.mdpi.com/1996-1073/11/8/2083 |
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