Abstract
In this paper, a novel symmetrical topology for the small power high frequency bidirectional AC-DC converter has been proposed, which is applied to the bi-directional wireless power transmission system based on the magnetic coupling resonance. It has dual functions of the inverter and rectifier. The research is mainly reflected in the following aspects: First, based on analyzing the principle of the wireless power bidirectional transmission technology, the operation mechanism of the topology circuit is analyzed emphatically. Second, the feasibility of the designed converter is verified by the simulation of the PSPICE software. Third, the hardware system has been operated at 200 kHz in the modes of the constant current, the constant voltage and the constant resistance, respectively. The results show the maximal output power of the designed circuit is 7.8 W, meeting the design requirement. This circuit has the advantages of the simple circuit structure and simple control. It's suitable for the bidirectional wireless power charging of the small power portable devices.
Highlights
The development of the wireless power transmission technology makes the development of the public mobile charging equipment possible
Most of the current researches focus on the unidirectional transmission system, such as, the electrical power can only be transmitted to the portable devices through the power supply group
A novel symmetrical topology circuit has been presented for the small power bidirectional wireless charging based on the magnetic coupling resonance, which has dual functions of the inverter and rectifier
Summary
The development of the wireless power transmission technology makes the development of the public mobile charging equipment possible. A novel symmetrical topology circuit has been presented for the small power bidirectional wireless charging based on the magnetic coupling resonance, which has dual functions of the inverter and rectifier. It can realize itself as the charging terminal of the wireless power, and realize itself as the power supply end of the wireless power to charge other portable devices when the situation is without the power supply group. The research is aimed to reduce the volume of the device, improve the maximal output power and the compatibility of the device
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