Wireless energy transfer system with constant voltage and constant current output

Abstract

The invention discloses a wireless energy transmission system with constant voltage and constant current output and belongs to the technical field of wireless electric energy transmission. The systemaims at solving the problem that the system complexity and loss are increased due to the fact that the existing wireless electric energy transmission system needs cooperation with a special controllerin a constant voltage and constant current output conversion process. An output end of a frequency variable inverter power supply is connected with an input end of a multi-resonant primary side compensation topology. The output end of the multi-resonant primary side compensation topology is connected with a primary side coil of a coupling mechanism. The output end of a secondary side coil of thecoupling mechanism is connected with the input end of a multi-resonant secondary side compensation topology. The output end of the multi-resonant secondary side compensation topology is connected withthe input end of a rectifier circuit. The output end of the rectifier circuit is connected with the input end of a load. A state identification and frequency controller is used for detecting a charging state of the load and controlling output frequency of the frequency variable inverter power supply according to the charging state of the load. The system is used for the wireless energy transmission

Description

technical field [0001] The invention relates to a wireless energy transmission system with constant voltage and constant current output, and belongs to the technical field of wireless energy transmission. Background technique [0002] The current wireless power transmission technology has been applied to many fields, such as wireless charging equipment such as mobile phones, robots, and automatic guided vehicles. The loads of these wireless charging systems are all rechargeable batteries. At present, there is a major technical problem in the design of the wireless power transmission system whose load is the battery. [0003] The charging method of the battery is different from that of ordinary loads. The general load is in constant current or constant voltage power supply mode, while the system with the battery as the load includes both constant voltage and constant current charging processes. Take constant current to constant voltage charging as an example: first, use cons...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing wireless power transmission system needs a special controller to cooperate in the conversion process of constant voltage and constant current output, which increases the complexity of the system and increases the loss. Wireless energy transfer system with constant current output

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