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A non-contact power transmission device and power transmission method

A non-contact technology for power transmission, applied in the direction of circuit devices, electrical components, etc., can solve problems such as damage to DC-DC converters, coupling enhancement, and increase in magnetic field energy

Active Publication Date: 2017-11-10
NINGBO WEIE ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] However, during the power transmission process, the coupling between the transmitting coil and the receiving coil will change, such as a sudden increase in the coupling or a sudden increase in the magnetic field energy in the transmitting coil, which will result in a DC voltage V after the full-bridge rectifier circuit rect Exceeding the preset value, excessive voltage will damage the DC-DC converter of the subsequent stage, and even the electronic equipment on the load side

Method used

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  • A non-contact power transmission device and power transmission method
  • A non-contact power transmission device and power transmission method
  • A non-contact power transmission device and power transmission method

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Embodiment Construction

[0047] Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0048] refer to figure 2 Shown is a circuit block diagram of the first embodiment of the non-contact power transmission device according to the present invention, as figure 2 As shown, the non-contact power transmission device includes an isolated transmitting part and a receiving part, and the transmitting part includes an inverter (n...

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Abstract

The invention discloses a non-contact power transmission device and a power transmission method. The rectification and filtering circuit receives the high-frequency alternating current output by the receiving coil, and obtains a direct current voltage signal after being rectified and filtered by the full bridge. When the rectified and filtered When the DC voltage exceeds the predetermined value, a current loop is formed by using the switch protection circuit, the impedance matching circuit and the receiving coil, so that the energy of the receiving coil is transferred until the current voltage drops to no more than the predetermined voltage value. Wherein, the switch protection circuit is connected between the impedance matching network and the ground. When the power transmission device works normally, the switch protection circuit does not work. When an overvoltage occurs, the switch protection circuit performs a switching action to reduce the DC voltage. value.

Description

technical field [0001] The invention relates to the field of wireless charging, and more specifically, to a non-contact power transmission device and a power transmission method. Background technique [0002] Non-contact power transmission technology (also called wireless power transmission technology) is widely used in the field of electronic charging due to its advantages of safety and convenience. There are mainly two ways to realize wireless power transmission: magnetic induction and magnetic resonance. Magnetic resonance is commonly used The magnetic resonance wireless power transmission device mainly includes a transmitting part and a receiving part, both of which realize energy transmission through the principle of electromagnetic resonance. [0003] Generally speaking, the transmitting part includes an inverter, an impedance matching circuit and a transmitting coil, and the receiving part includes a receiving coil, an impedance matching circuit, a rectification circu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12
Inventor 苏恒溢
Owner NINGBO WEIE ELECTRONICS TECH CO LTD
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