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Control method for improving deviation tolerance of wireless charging system

A technology of wireless charging and control methods, applied in electromagnetic wave systems and other directions, can solve problems such as decreased efficiency, and achieve the effects of improving control speed, simplifying control complexity, and high accuracy

Active Publication Date: 2015-09-30
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the efficiency of the current wireless charging system seriously drops in the case of offset, and propose a control method for improving the offset tolerance of the wireless charging system

Method used

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  • Control method for improving deviation tolerance of wireless charging system
  • Control method for improving deviation tolerance of wireless charging system
  • Control method for improving deviation tolerance of wireless charging system

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0034] The structure of the wireless charging system applying the control method of the present invention is as follows figure 2 Shown. The wireless charging system includes a system power supply 201, an inverter 202, a wireless energy transmission coil and its impedance matching circuit 203, a rectifier 204, a system load 205, and a system controller 206. The system power supply 201 provides electrical energy for the entire wireless charging system. The input end of the inverter 202 is connected to the system power supply 201 to convert the electrical energy provided by the power supply into high-frequency alternating current; the output end of the inverter 202 is connected to the wireless energy transmission coil and its impedance The matching circuit 203 is connected, through the wireless energy transmission coil and its impedance matching circuit 203, the...

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Abstract

The invention provides a control method for improving the deviation tolerance of a wireless charging system. The method comprises the following steps of A, building a model of a wireless charging system; B, measuring the model parameter of the wireless charging system under the wireless energy transmission coil alignment and deviation condition; C, obtaining a system efficiency expression of the wireless charging system model; D, using the system efficiency expression for solving the optimum control frequency under the wireless energy transmission coil deviation condition; E, fitting the obtained optimum control frequency under different deviation conditions to obtain a frequency control curve; F, applying the frequency control curve into a system controller through programming, and controlling the wireless charging system.

Description

Technical field [0001] The invention relates to a control method of a wireless charging system, in particular to a control method for improving the offset tolerance of the wireless charging system. Background technique [0002] The concept of wireless charging was first proposed by American scientist Tesla. In 2007, researchers from the Massachusetts Institute of Technology proposed a new method of magnetic coupling resonant wireless power transmission and lit a 60W light bulb 2 meters away. Subsequently, wireless charging technology has received more and more attention and has been applied to fields such as embedded medical treatment, mobile phone and electric vehicle charging. [0003] However, in practical applications, there is often an offset between the wireless energy transmission coils, which brings adverse effects of a serious decline in the efficiency of the wireless charging system. CN 103532254 A "A working frequency adaptive adjustment device applied to WPT system" d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J17/00
Inventor 郭彦杰王丽芳李芳朱庆伟陶成轩廖承林张俊智
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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