Publicação
Oscillating driving circuit for a wireless power transfer system
| Resumo: | In this thesis a power converter is designed to power a wireless power transfer system. The Converter is composed by a DC-AC Class-E inverter, a matching circuit and a spiral antenna. The system is designed to provide 200W and has a working frequency of 13.57 MHz, to comply with the restriction of the radio regulations. Other solutions and the reason for the choice are presented. the theory of modes is briefly introduced characterize a wireless power transfer system. The components of the Class-E inverter were calculated to guarantee the Zero Voltage Switching (ZVS) operation, resulting in the only losses in the system been the conducting ones. When operating in optimal conditions, the converter has an efficiency higher than 90%. A spiral Antenna is designed and its self-inductance is calculated utilizing potential vectors. The antenna has the purpose of exciting the wireless power transfer system. To attach the antenna to the inverter a matching circuit is designed to make sure that the inverter operates with high efficiency, regardless of the antenna’s impedance. The results were provide by simulations using Orcad’s PSpice software and the components calculations were made using MATLAB. The simulation results show the behavior of the system working in non-optimum conditions and they are used to tune the components of the inverter and the matching circuit to achieve ZVS on the MOSFET and reach the highest efficiency. |
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| Autores principais: | Rhodes, Miguel Filipe Matos de |
| Assunto: | Wireless power transfer Class-E inverter Mode theory ZVS Transferência de potência sem fios Inversor class-E Teoria dos modos |
| Ano: | 2016 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Científico do Instituto Politécnico de Lisboa |
| Resumo: | In this thesis a power converter is designed to power a wireless power transfer system. The Converter is composed by a DC-AC Class-E inverter, a matching circuit and a spiral antenna. The system is designed to provide 200W and has a working frequency of 13.57 MHz, to comply with the restriction of the radio regulations. Other solutions and the reason for the choice are presented. the theory of modes is briefly introduced characterize a wireless power transfer system. The components of the Class-E inverter were calculated to guarantee the Zero Voltage Switching (ZVS) operation, resulting in the only losses in the system been the conducting ones. When operating in optimal conditions, the converter has an efficiency higher than 90%. A spiral Antenna is designed and its self-inductance is calculated utilizing potential vectors. The antenna has the purpose of exciting the wireless power transfer system. To attach the antenna to the inverter a matching circuit is designed to make sure that the inverter operates with high efficiency, regardless of the antenna’s impedance. The results were provide by simulations using Orcad’s PSpice software and the components calculations were made using MATLAB. The simulation results show the behavior of the system working in non-optimum conditions and they are used to tune the components of the inverter and the matching circuit to achieve ZVS on the MOSFET and reach the highest efficiency. |
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