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Voltage injection decoupling control method for modular wireless charging system

A technology of wireless charging and voltage injection, applied in charging stations, battery circuit devices, electric vehicle charging technology, etc., can solve problems such as output control, and achieve the effect of eliminating mutual coupling

Active Publication Date: 2021-03-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Modular wireless energy transfer technology is conducive to breaking through the limitations of traditional single-channel wireless charging, but due to the complex cross-coupling between different modules, it is difficult to control the output of one of the modules independently, so there is no practical application at present.

Method used

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  • Voltage injection decoupling control method for modular wireless charging system
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  • Voltage injection decoupling control method for modular wireless charging system

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Effect test

Embodiment Construction

[0022] The technical scheme of the present invention is explained below with specific examples:

[0023] Taking the wireless charging system with two modules as an example to illustrate and explain the present invention, it is finally extended to an infinite multi-module system.

[0024] theoretical derivation

[0025] Firstly, the traditional single-channel wireless charging system is analyzed, and the fundamental equivalent circuit is as follows: figure 1 shown. The circuit voltage equation can be listed:

[0026]

[0027]

[0028]

[0029]

[0030] L 1T with L 1R Represents the self-inductance of the transmitting and receiving coils, C 1T with C 1R Indicates the compensation capacitance of the primary side and the secondary side, R 1T Indicates the parasitic resistance of the primary side, R 1R Indicates the sum of the equivalent load resistance of the secondary side and the parasitic resistance of the secondary side, M i(j)Tj(i)R , i, j∈[1,n], i≠j, re...

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Abstract

The invention discloses a voltage injection decoupling control method of a modular wireless charging system. The modular wireless charging system contains several wireless charging modules, and each module includes a transmitting coil and a receiving coil facing each other. The output current of the module can be individually controlled by adding the current proportional items of the other modules to the fundamental wave input voltage when a module acts on a single channel. The method of the present invention can individually control the output current and power after decoupling for any number of wireless charging modules, and different resonant cavity parameters and any coil mutual inductance parameters do not affect the generality of the method. This method injects the proportional term of the current of other modules into the fundamental wave input voltage of each module when it acts on a single channel, thereby eliminating the influence of cross-coupling of other modules on the output current of the receiving end of the module, so there is no need for the main power loop of the system Adding Chinese and foreign components can realize the decoupling between the outputs of different wireless charging modules.

Description

technical field [0001] The invention belongs to the technical field of wireless charging, and relates to a voltage injection decoupling control method of a modular wireless charging system. Background technique [0002] With the increasingly serious problems of energy shortage and environmental pollution worldwide, the importance of developing electric vehicles has become increasingly prominent. Wireless charging technology for electric vehicles has attracted much attention due to its advantages of high efficiency, convenience, low maintenance cost, and no environmental impact. Although the current low-power wireless charging technology has been developed to a certain extent, high-power wireless fast charging is still under study. Modular wireless energy transfer technology is conducive to breaking through the limitations of traditional single-channel wireless charging, but due to the complex cross-coupling between different modules, it is difficult to control the output of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/40H02J50/10H02J50/12H02J7/00B60L53/12
CPCB60L53/12H02J50/10H02J50/12H02J50/40Y02T10/70Y02T10/7072Y02T90/14
Inventor 钟文兴徐德鸿朱晨李豪
Owner ZHEJIANG UNIV
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