A control method of an electric field coupled wireless power transmission system

Abstract

The invention discloses an electric field coupled power transfer system and a control method based on the novel topology. The system comprises a high-frequency inverter, a high-frequency resonator, an electric field coupling mechanism and an electric energy conversion link, and is characterized in that the high-frequency inverter is a double-E type amplifying high-frequency inverter, a high-frequency transformer is arranged between the high-frequency inverter and the high-frequency resonator, the high-frequency resonator is further connected with a controller, and the output end of the controller is connected with an inductance compensation tuning module and a drive circuit. The electric field coupled power transfer system has the obvious effects that the high-frequency voltage at the two ends of a coupling mechanism is increased, the strength of an electric field is enhanced, the transmission distance is lengthened, the voltage at the two ends of a high-frequency switch tube is increased to meet the requirement of high-frequency power electronic devices at the present stage, the power capacity of the system is improved, the voltage of the switch tube is reduced, the switch loss is reduced, and the adaptive ability of the system is improved.

Description

technical field [0001] The present invention relates to an electric-field coupled wireless power transfer (Electrical-field coupled power transfer) technology, referred to as ECPT technology, and in particular to a control method for an electric-field coupled wireless power transfer system. Background technique [0002] In recent years, in the field of wireless power transfer technology, the wireless power transfer technology based on electric field coupling technology has attracted the attention of many researchers at home and abroad because of its unique advantages. From the current research results, it can be seen that the coupling electrodes of the ECPT system are simple, light and thin, and the shape is not limited. The system has good flexibility and low overall cost; The integrated circuit can also be surrounded inside, and the design form of the pick-up circuit is more diverse; in the working state, most of the electric flux of the electric field coupling structure i...

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Problems solved by technology

However, the time variation of the coupling coefficient will cause the inherent frequency drift of ECPT, which cannot guarantee the stable operation of the system.

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