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Magnetic coupling resonance type wireless charging transmitting circuit and wireless charging transmitting device

A wireless charging and transmitting circuit technology, applied in the direction of circuit devices, electrical components, etc., can solve the problems of complex circuits, high design cost of wireless charging transmitting end, etc., and achieve the effect of simplified circuit, low cost, and cost reduction

Active Publication Date: 2020-05-01
ZHEJIANG HUAYUN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of high design cost and complicated circuit of the existing wireless charging transmitting end, and designs a magnetic coupling resonant wireless charging transmitting circuit and a wireless charging transmitting device. The design scheme is not controlled by MCU to simplify Hardware design realizes resonant circuit control, which can save application cost

Method used

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  • Magnetic coupling resonance type wireless charging transmitting circuit and wireless charging transmitting device
  • Magnetic coupling resonance type wireless charging transmitting circuit and wireless charging transmitting device
  • Magnetic coupling resonance type wireless charging transmitting circuit and wireless charging transmitting device

Examples

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Embodiment

[0029] Example: such as figure 1 As shown, it is a structural diagram of a magnetic coupling resonant wireless charging transmission circuit, which consists of a full bridge inverter circuit 1, a current sampling circuit 2, an operational amplifier circuit 3, a filter circuit 42, an oscillation circuit 8, a conversion circuit 4, and a delay circuit 6 and a comparison circuit 5, the full-bridge inverter circuit 1 is composed of a full-bridge inverter power circuit 11 and a MOSFET tube drive circuit 12, and the current sampling circuit 2 is composed of a first current sampling circuit 21 and a second current sampling circuit 22. The amplifier circuit 3 is composed of an adding circuit 31 and an amplifying circuit 32, the comparison circuit 5 is composed of a first comparison circuit 51 and a second comparison circuit 52, the conversion circuit 4 is composed of a full-bridge rectifier circuit 41 and a filter circuit 42, and the external power supply passes through an adapter 7 To...

specific Embodiment approach

[0032] Applicable if figure 2 The specific implementation of the schematic diagram of a magnetic coupling resonant wireless charging transmitter circuit shown is as follows:

[0033] Such as image 3 Shown is a schematic diagram of a wireless charging device of the present invention, consisting of a launch plate and a coil L S And receiving board, load resistor RL and coil L R composition. The circuit principle in the launch board is suitable for such as figure 2 The schematic diagram of a magnetic coupling resonant wireless charging transmitter circuit is shown. After the transmitter board is powered on, the output terminal DR of the first comparison circuit 51 in the initial state 1 is high level, after the MOSFET integrated drive circuit, the MOSFET tube Q 2 and MOSFET Q 3 The gate level of the MOSFET is set high, and the MOSFET Q 1 and MOSFET Q 4 The gate level of the MOSFET is set low, at this time, the MOSFET makes Q 2 and MOSFET Q 3 conduction, MOSFET tube Q...

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Abstract

The invention discloses a magnetic coupling resonance type wireless charging transmitting circuit and a wireless charging transmitting device. The magnetic coupling resonance type wireless charging transmitting circuit comprises a full-bridge inverter circuit, a current sampling circuit, an operational amplifier circuit, an oscillation circuit, a conversion circuit, a time delay circuit and a comparison circuit, wherein one output end of the full-bridge inverter circuit is electrically connected with one sampling end of the current sampling circuit, the other output end of the full-bridge inverter circuit is electrically connected with the other sampling end of the current sampling circuit through the oscillation circuit, an output end of the current sampling circuit is electrically connected with input ends of the conversion circuit and the operational amplifier circuit respectively, an input end of the comparison circuit is electrically connected with output ends of the conversion circuit and the operational amplifier circuit, an output end of the comparison circuit is electrically connected with an input end of the time delay circuit, and an output end of the time delay circuitis electrically connected with a driving end of the full-bridge inverter circuit. The magnetic coupling resonance type wireless charging transmitting circuit is advantaged in that no MCU control is adopted, resonance type circuit control is achieved through simplified hardware design, and application cost is saved.

Description

technical field [0001] The present invention relates to the technical field of electronic circuits, in particular to a magnetic coupling resonance type wireless charging transmitting circuit and a wireless charging transmitting device. Background technique [0002] Wireless charging can get rid of the shackles of metal wires and expand the transmission range of electric energy; it has the advantages of safety, reliability, convenience and flexibility. Magnetic coupling wireless charging is one of many wireless charging methods. Magnetically coupled resonant wireless charging can meet the wireless energy transmission at distances from cm to m, and has a wide range of application prospects. [0003] At present, the high-frequency power drive circuit of the magnetically coupled wireless charging transmitter is basically implemented in three ways; the first is to amplify the power of the small signal to drive the LC circuit on the primary side of the transformer to resonate; th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/12
CPCH02J50/12
Inventor 李阳春张兴吕晓飞李鹏
Owner ZHEJIANG HUAYUN INFORMATION TECH CO LTD