Automatic Adaptation of Multi-Loop Wireless Power Transfer to Variable Coupling between Transmit and Receive Coils
In the conventional wireless power transfer (WPT) using magnetic resonance coupling, power transfer efficiency (PTE) exhibits a peak only at a matched distance between transmitter (Tx) and receiver (Rx). That is, it rapidly degrades if the distance deviates from the matched distance. In order to ach...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-07-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/11/7/1789 |
| _version_ | 1818013407724437504 |
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| author | Kyeongmok Ryu Jinho Jeong |
| author_facet | Kyeongmok Ryu Jinho Jeong |
| author_sort | Kyeongmok Ryu |
| collection | DOAJ |
| description | In the conventional wireless power transfer (WPT) using magnetic resonance coupling, power transfer efficiency (PTE) exhibits a peak only at a matched distance between transmitter (Tx) and receiver (Rx). That is, it rapidly degrades if the distance deviates from the matched distance. In order to achieve high PTE over a wide range of the distance, automatic range-adaptation technique is proposed in this work by using multi-loop technique and tunable matching circuit with digital capacitors. For automatic range adaptation, the microcontroller unit (MCU) in Rx runs an algorithm to find optimum loop and capacitance for best PTE based on the received power. Tx and Rx are synchronized by using low power Bluetooth wireless communications. Instead of the conventional relays, microelectromechanical system (MEMS) switches with low loss and high isolation are employed to minimize the power dissipation. The entire WPT system automatically maximize PTE with the distance, achieving high PTE of 80.5% at 30 cm and 29.7% at 100 cm. |
| first_indexed | 2024-04-14T06:33:53Z |
| format | Article |
| id | doaj.art-aa68591154ec439799e99123e96f0189 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-14T06:33:53Z |
| publishDate | 2018-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-aa68591154ec439799e99123e96f01892022-12-22T02:07:33ZengMDPI AGEnergies1996-10732018-07-01117178910.3390/en11071789en11071789Automatic Adaptation of Multi-Loop Wireless Power Transfer to Variable Coupling between Transmit and Receive CoilsKyeongmok Ryu0Jinho Jeong1Department of Electronic Engineering, Sogang University, Seoul, KoreaDepartment of Electronic Engineering, Sogang University, Seoul, KoreaIn the conventional wireless power transfer (WPT) using magnetic resonance coupling, power transfer efficiency (PTE) exhibits a peak only at a matched distance between transmitter (Tx) and receiver (Rx). That is, it rapidly degrades if the distance deviates from the matched distance. In order to achieve high PTE over a wide range of the distance, automatic range-adaptation technique is proposed in this work by using multi-loop technique and tunable matching circuit with digital capacitors. For automatic range adaptation, the microcontroller unit (MCU) in Rx runs an algorithm to find optimum loop and capacitance for best PTE based on the received power. Tx and Rx are synchronized by using low power Bluetooth wireless communications. Instead of the conventional relays, microelectromechanical system (MEMS) switches with low loss and high isolation are employed to minimize the power dissipation. The entire WPT system automatically maximize PTE with the distance, achieving high PTE of 80.5% at 30 cm and 29.7% at 100 cm.http://www.mdpi.com/1996-1073/11/7/1789wireless power transfer (WPT)magnetic resonancetunable impedance matchingrange adaptation |
| spellingShingle | Kyeongmok Ryu Jinho Jeong Automatic Adaptation of Multi-Loop Wireless Power Transfer to Variable Coupling between Transmit and Receive Coils Energies wireless power transfer (WPT) magnetic resonance tunable impedance matching range adaptation |
| title | Automatic Adaptation of Multi-Loop Wireless Power Transfer to Variable Coupling between Transmit and Receive Coils |
| title_full | Automatic Adaptation of Multi-Loop Wireless Power Transfer to Variable Coupling between Transmit and Receive Coils |
| title_fullStr | Automatic Adaptation of Multi-Loop Wireless Power Transfer to Variable Coupling between Transmit and Receive Coils |
| title_full_unstemmed | Automatic Adaptation of Multi-Loop Wireless Power Transfer to Variable Coupling between Transmit and Receive Coils |
| title_short | Automatic Adaptation of Multi-Loop Wireless Power Transfer to Variable Coupling between Transmit and Receive Coils |
| title_sort | automatic adaptation of multi loop wireless power transfer to variable coupling between transmit and receive coils |
| topic | wireless power transfer (WPT) magnetic resonance tunable impedance matching range adaptation |
| url | http://www.mdpi.com/1996-1073/11/7/1789 |
| work_keys_str_mv | AT kyeongmokryu automaticadaptationofmultiloopwirelesspowertransfertovariablecouplingbetweentransmitandreceivecoils AT jinhojeong automaticadaptationofmultiloopwirelesspowertransfertovariablecouplingbetweentransmitandreceivecoils |