Constant-voltage output capacitive wireless charging system

A constant voltage output, wireless charging technology, applied to electrical components, circuit devices, etc., can solve problems such as reducing system efficiency

Pending Publication Date: 2020-01-17
SHANGHAI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, inductive wireless power transfer technology is inherently sensitive to metal objects. When there are surrounding metal objects, eddy currents will be generated, which will significantly reduce system efficiency.
The above-mentioned problems do not exist in capacitive power transmission, but the wireless charging products based on capacitive power transmission in the market are currently in a near-blank stage

Method used

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  • Constant-voltage output capacitive wireless charging system
  • Constant-voltage output capacitive wireless charging system
  • Constant-voltage output capacitive wireless charging system

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Embodiment Construction

[0014] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0015] Such as figure 1 As shown, a capacitive wireless charging system with constant voltage output provided by the present invention includes a resonant circuit one and a resonant circuit two. Resonant circuit one is located at the transmitting end. In this embodiment, the capacitor C t1 and inductance L t1 Form an LC resonant circuit, the function of the LC resonant circuit is to convert the constant voltage source V in ...

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Abstract

The invention provides a constant-voltage output capacitive wireless charging system. The system is characterized by comprising a resonance circuit I located at a transmitting end and used for converting an alternating current provided by an external power supply Vin into the constant-current output ; and a resonance circuit II which is used for converting the constant-current output into the constant-voltage output to charge a load RL. The invention provides a constant-voltage output system based on capacitive power transmission in order to solve the problem that the inductive power transmission process is sensitive to the surrounding metal. According to the system provided by the invention, the problem of insufficient electric energy transmission capability caused by the relatively smaller equivalent capacitance of a polar plate during the capacitive electric energy transmission is solved by utilizing resonance, and the constant-voltage output is realized. A specific circuit topological graph and a transmission polar plate structure are given below.

Description

technical field [0001] The invention relates to a capacitive wireless charging system. Background technique [0002] As a non-contact power supply solution, wireless charging has been widely used in many fields such as portable electronic devices, implantable medical devices, and electric vehicles. Inductive-based wireless power technology and capacitive-based wireless power transfer technology are two of the most potential short-distance wireless charging technology solutions. In recent years. Inductive wireless power transfer technology has been developed rapidly in the industrial and academic fields. However, inductive wireless power transfer technology is inherently sensitive to metal objects. When there are surrounding metal objects, eddy currents will be generated, which will significantly reduce system efficiency. The above-mentioned problems do not exist in capacitive power transmission, but the wireless charging products based on capacitive power transmission in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/05H02J50/12
CPCH02J50/05H02J50/12
Inventor 傅旻帆王世颖
Owner SHANGHAI TECH UNIV
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