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A wireless charging transmitter, receiver, method and system

A technology of wireless charging and transmitting end, which is applied in the field of receiving end and wireless charging transmitting end, and can solve problems such as inverter protection shutdown, inverter output current exceeding the limit value, etc.

Active Publication Date: 2021-02-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] At present, the control method of the wireless charging system is mainly to simplify the control of the mutual operation of the transmitting end and the receiving end, so that the control of the transmitting end and the receiving end is decoupled as much as possible. However, it is easy to cause the output current of the inverter to exceed the limit value. Make the inverter shut down because the parameters exceed the limit value

Method used

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  • A wireless charging transmitter, receiver, method and system
  • A wireless charging transmitter, receiver, method and system
  • A wireless charging transmitter, receiver, method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0170] The working principle of the receiving end of a wireless charging system provided in the embodiment of the present application is introduced below.

[0171] The rectifier in this embodiment only includes diodes, and the rectifier is a diode uncontrolled full-bridge rectifier as an example for specific introduction.

[0172] see Figure 9 , which is a schematic diagram of a system corresponding to a receiving end provided in the embodiment of the present application.

[0173] Figure 9 It can be seen from the figure that the inverter H1 at the transmitting end includes four controllable switch tubes Q1-Q4. The rectifier H2 at the receiving end includes four diodes D1-D4.

[0174] Since the rectifier H2 only includes diodes, the rectifier H2 has no adjustment value, and the control of the output current of the system is realized by changing the current of the transmitting coil at the transmitting end. The transmitting coil current at the transmitting end may be the ou...

Embodiment 2

[0196] The rectifier in this embodiment only includes a controllable switch tube, and the rectifier is a full-bridge rectifier as an example for specific introduction. Since the rectifier includes a controllable switch tube, the output parameters (current, voltage or power) of the wireless charging system can be adjusted by first adjusting the phase shift angle between the two bridge arms of the rectifier. When the phase shift angle is adjusted to the limit value, if it can no longer be adjusted, then adjust the transmitting coil current at the transmitting end. The following will continue to take the transmitting coil current at the transmitting end as the transmitting coil current as an example for illustration.

[0197] see Figure 11 , which is a schematic diagram of another system corresponding to the receiving end provided in the embodiment of the present application.

[0198] Figure 11 It can be seen from the figure that the rectifier H2 includes two bridge arms, an...

Embodiment 3

[0232] The rectifier in this embodiment includes a controllable switch tube and a diode. Wherein, the rectifier may be a full-bridge rectifier or a half-bridge rectifier. In the following, the rectifier includes two bridge arms, wherein the upper half bridge arm of each bridge arm is a diode, and the lower half bridge arm is a controllable switch tube as an example for introduction.

[0233] see Figure 15 , which is a schematic diagram of another system corresponding to the receiving end provided in the embodiment of the present application.

[0234] Similar to the second embodiment of the receiving end, since the receiving end includes a controllable switching tube, the rectifier at the receiving end has adjustable parameters, and the output parameters of the system can be adjusted by adjusting the duty cycle of the controllable switching tube of the rectifier. For example, to adjust the output current, output voltage and output power of the system, this embodiment uses th...

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Abstract

The present application provides a wireless charging transmitter, receiver, method and system, which are applied in the field of electric vehicles. The transmitter controller compares the actual output current of the inverter with the preset upper limit of the output current of the inverter, and controls the output voltage of the inverter according to the comparison result to adjust the current of the transmitting coil so that the actual output of the inverter The current is less than or equal to the preset upper limit value of the output current of the inverter. The receiver controller receives the transmitter coil current sampling value sent by the transmitter controller; when the difference between the transmitter coil current sample value and the reference value of the transmitter coil current is greater than or equal to the preset value, the reference value of the transmitter coil current is updated to make the inverter The actual output current of the inverter is less than or equal to the preset upper limit value of the output current of the inverter. The receiving end and the transmitting end interact to achieve better control. Under the premise of ensuring that the output current of the inverter does not exceed the preset upper limit, the receiving end should have a larger adjustment range of the transmitting coil current as much as possible.

Description

technical field [0001] The present application relates to the technical field of wireless charging, and in particular to a wireless charging transmitting end, receiving end, method and system. Background technique [0002] With the aggravation of energy shortage and environmental pollution in modern society, electric vehicles, as new energy vehicles, have received widespread attention from all walks of life. Electric vehicles use on-board power battery packs as energy sources to drive vehicles. [0003] The charging methods of electric vehicles currently include contact charging and wireless charging, and the wireless charging method is convenient to use, has no sparks and no risk of electric shock, so wireless charging has become the development direction of electric vehicles in the future. [0004] Attached below figure 1 Introduce the working principle of the wireless charging system. [0005] see figure 1 , which is a schematic diagram of a wireless charging system. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L53/12B60L53/122H02J7/02H02J50/10H02J7/00
CPCB60L53/12B60L53/122H02J50/10Y02T10/72B60L53/66B60L2210/10B60L2210/20H02J50/80H02J50/12B60L53/62
Inventor 陈双全武志贤毛云鹤曾晓生游洪程
Owner HUAWEI TECH CO LTD