A wireless charging system for electric vehicles and a control method for wireless charging

A wireless charging and electric vehicle technology, applied in electric vehicles, battery circuit devices, current collectors, etc., can solve problems affecting system transmission, out-of-control frequency conversion control, voltage harmonics, etc., to improve transmission characteristics, good control stability, The effect of avoiding detuning

Active Publication Date: 2018-02-16
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, in terms of control methods for wireless charging of electric vehicles, frequency conversion control, phase-shift control, etc. are more common. Harmonics will appear in the lower voltage, which will cause distortion and affect the transmission of the system; and the frequency conversion control will appear out of control

Method used

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  • A wireless charging system for electric vehicles and a control method for wireless charging
  • A wireless charging system for electric vehicles and a control method for wireless charging
  • A wireless charging system for electric vehicles and a control method for wireless charging

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] figure 1 It is a schematic diagram of the wireless charging system of the present invention. Such as figure 1 As shown, the wireless charging device includes a DC power supply 1 , an inverter board 2 , a loosely coupled transformer 3 , a rectification and filtering unit 4 , and a dSPACE controller 5 .

[0035] The DC power supply 1 is connected to the inverter board 2 to provide a DC input voltage. The inverter board 2 is triggered by two PWM signals to generate a high-frequency alternating voltage, which is transmitted to the loosely coupled transformer 3 to provide a high-frequency AC signal, which is transmitted through the loosely coupled transformer. The current signal at the output terminal is sorted and filtered by the rectification and filtering unit 4 to obtain a DC current signal, and the DC current signal acts on the load to charge the battery 6 o...

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Abstract

The invention discloses an electric automobile wireless charging system and a method for controlling wireless charging. The wireless charging system includes a direct current power supply, an inversion board, a loose coupling transformer, a rectification and filtering unit and a dSPACE controller, wherein the dSPACE controller is connected between the inversion board and the rectification and filtering unit, a current signal of a load end is obtained through sampling by a DS2003 module, then the duty ratio and a frequency signal are obtained through a logical operation module, and are input to a DS5101 module, and the DS5101 module outputs two paths of PWM control signals. The dSPACE controller can rapidly sweep frequency, thereby enabling the wireless charging system to reach a resonant state, and enabling a power factor and transmission characteristic of a transmission system to reach up to the best, in addition, the duty ratio of a high frequency square wave voltage source can be regulated through PWM control, and constant current output of the wireless charging system is realized.

Description

technical field [0001] The invention relates to a charging system and a wireless charging method, and in particular to a wireless charging system and a wireless charging control method for an electric vehicle, belonging to the field of wireless charging. Background technique [0002] Electric vehicle charging methods include charging pile contact charging and wireless non-contact charging. At this stage, the most commonly used is charging pile contact charging. However, non-contact charging has the advantages of convenient operation, safety, simplicity, no contact wear, and no direct electrical connection. In addition, the intelligent control of wireless charging does not require manual operation, which can effectively avoid human operation. In contrast, the disadvantages of contact charging are very obvious. Therefore, wireless charging is of great significance for future development, and it is also a very competitive hotspot. [0003] At present, in terms of control me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/02H02J50/12B60L11/18
CPCH02J7/025Y02T10/72
Inventor 周晶方攸同周晨曦高玉青黄晓艳马吉恩张健
Owner ZHEJIANG UNIV
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