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Voltage optimization method of electric-field coupling type wireless charging technology of electromobile

A technology of electric vehicle and wireless charging, applied in electric vehicle charging technology, electric vehicles, charging stations, etc., can solve problems such as human injury and reduce the safety of CPT system

Active Publication Date: 2019-06-28
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an electric field coupled electric vehicle to solve the problem that the metal car shell of the electric vehicle will generate an induced voltage exceeding the safety voltage threshold, which will cause human injury and reduce the safety of the CPT system when the electric vehicle is charged. Voltage optimization method for electric vehicle wireless charging technology

Method used

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Embodiment 1

[0083] Since the metal car shell will induce voltage in the electric field generated during the wireless power transmission process, it is necessary to optimize the structure of the wireless power transmission system to reduce the voltage on the metal car shell. In order to solve the above problems, a preferred embodiment of the present invention provides An electric field coupled electric vehicle wireless charging technology voltage optimization method. like figure 1 As shown, it includes a sequentially connected DC power supply, an electric field coupled wireless power transfer circuit, and a load. The electric field coupled wireless power transfer circuit includes a sequentially connected high frequency inverter, a primary side compensation structure, a coupling structure, and a secondary side compensation structure and high frequency rectifiers. Among them, the coupling structure includes a simulated ground P5, a simulated car shell P6, and a coupling plate group composed...

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Abstract

The invention discloses a voltage optimization method of an electric-field coupling type wireless charging technology of an electromobile, and relates to the technical field of electric-field couplingtype wireless charging. A direct current power supply, a high-frequency inverter, a primary edge compensation structure, a coupling structure, a secondary edge compensation structure, a high-frequency rectifier and a load which are successively connected are involved. The coupling structure comprises a simulation ground, a simulation electromobile shell and a coupling pole plate set, the couplingpole plate set comprises two transmitting pole plates and two receiving pole plates, and every two of the transmitting pole plates, the receiving pole plates, the simulation ground and the simulationelectromobile shell form a capacitor. The method comprises the steps that firstly, parameters, input voltages, output voltages and output powers of all the capacitors among the pole plates in the system are determined, then the system frequency v is selected, the system frequency v is compared with the lowest system frequency fmin obtained from calculation of the parameters, the system frequencyv is determined, inductance values of all transmitting coils and receiving coils are calculated, and based on the calculated inductance values, the transmitting coils and the receiving coils are manufactured to construct a CPT system circuit.

Description

technical field [0001] The invention relates to the technical field of electric field coupling wireless charging, in particular to an electric field coupling electric vehicle wireless charging technology voltage optimization method. Background technique [0002] With the rapid increase of switching frequency of power devices, wireless power transmission technology has been greatly developed. For some special power supply environments, wireless power transmission technology frees power supply and power receiving devices from the disadvantages of being limited by cables, and has been widely used due to its advantages of high efficiency, wide flexibility, and strong security. Among them, the wireless power transfer technology mainly has two implementation methods: a magnetic field coupling formula (Inductive Power Transfer, IPT) and an electric field coupling formula (Capacitive Power Transfer, CPT). IPT technology relies on the high-frequency magnetic field to transmit electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/126H02J50/12
CPCY02T10/70Y02T10/7072Y02T90/14
Inventor 麦瑞坤郭历谋罗博何正友
Owner SOUTHWEST JIAOTONG UNIV
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