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Wireless charging system derating control method, device and wireless charging system

A technology of wireless charging and control methods, applied in circuit devices, battery circuit devices, current collectors, etc., can solve the problems of increased MOS tube loss, damage to MOS tubes, and reduced efficiency of wireless charging systems, and achieves suppression of increase and decrease. The effect of loss

Active Publication Date: 2021-05-28
深圳赫兹创新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An embodiment of the present invention provides a derating control method for a wireless charging system, which aims to solve the problem that the distance between the transmitting coil and the receiving coil of the wireless charging system is too close, and the MOS tube current of the high-frequency inverter module is large, resulting in an increase in the loss of the MOS tube. The efficiency of the wireless charging system decreases, and even the problem of damage to the MOS tube

Method used

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  • Wireless charging system derating control method, device and wireless charging system
  • Wireless charging system derating control method, device and wireless charging system
  • Wireless charging system derating control method, device and wireless charging system

Examples

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Embodiment 1

[0028] In some alternative examples, please refer to figure 2 , figure 2 It is a schematic flowchart of an embodiment of a wireless charging system derating control method of the present application.

[0029] Such as figure 2 As shown, the first aspect of the present application provides a wireless charging system derating control method, the method includes the following steps:

[0030] S1100. Collect the first inverter current of the high-frequency inverter module at the transmitting end of the wireless charging system and the first input voltage of the Buck module at the receiving end;

[0031] The schematic diagram of the wireless charging system is as follows: figure 1 As shown, the wireless charging system includes a transmitter and a receiver, wherein the transmitter includes a rectifier module, a high-frequency inverter module, and a transmitter coil, and the receiver includes a receiver coil, a rectifier module, and a Buck module, and the rectifier module at the...

Embodiment 2

[0041] In some alternative embodiments, see image 3 , image 3 It is a schematic flow chart of an embodiment of the present application after the high-frequency inverter module is activated.

[0042] Such as image 3 As shown, before the step of collecting the first inverter current of the high-frequency inverter module at the transmitting end of the wireless charging system and the first input voltage of the Buck module at the receiving end, the wireless charging system derating control method provided by the present application further includes:

[0043] S1010, detecting the second inverter current of the high-frequency inverter module and the second input voltage of the Buck module after the high-frequency inverter module is turned on;

[0044] S1020. Determine whether the second inverter current is less than a preset second current threshold and whether the second input voltage is less than a preset second voltage threshold;

[0045] The second inverter current is the ...

Embodiment 3

[0051] In some alternative embodiments, see Figure 4 , Figure 4 It is a schematic flow chart of adjusting the output current of the Buck module in an embodiment of the wireless charging system derating control method provided in this application.

[0052] Such as Figure 4 As shown, when the first inverter current is greater than the first current threshold or the first input voltage is greater than the first voltage threshold, the phase shift angle of the high-frequency inverter module is controlled to increase until the first inverter current is less than the first current threshold And after the step that the first input voltage is within the preset module turn-on voltage range, the wireless charging system derating control method provided by the present application further includes the following steps:

[0053] S1400, obtaining the real-time input voltage of the Buck module;

[0054] S1500. Adjust the output current of the Buck module according to the preset current a...

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Abstract

The present invention is applicable to the technical field of wireless charging systems, and provides a wireless charging system derating control method, device and wireless charging system. The method includes: collecting the first inverter current of the high-frequency inverter module at the transmitting end of the wireless charging system and The first input voltage of the Buck module at the receiving end; judging whether the first inverter current is greater than the preset first current threshold or whether the first input voltage is greater than the preset first voltage threshold; when the first inverter current is greater than the first current When the threshold or the first input voltage is greater than the first voltage threshold, control the phase shift angle of the high-frequency inverter module to increase until the first inverter current is less than the first current threshold and the first input voltage is within the preset module turn-on voltage range Inside. In the embodiment of the present application, even when the distance between the transmitting coil and the receiving coil is too close, the inverter current can be lower than the first current threshold, and the input voltage of the Buck module is within the module turn-on voltage range, reducing the loss of the MOS tube and allowing the system to charge normally.

Description

technical field [0001] The invention belongs to the technical field of wireless charging, and in particular relates to a wireless charging system derating control method, device and wireless charging system. Background technique [0002] The wireless charging system refers to the wireless transmitting coil and the wireless receiving coil transferring energy through the magnetic field to realize the non-contact transmission of electric energy. Due to the good functionality, high reliability, good flexibility, high safety and high service life of the wireless charging system, coupled with the characteristics of no contact and no wear, it is widely used in various fields. [0003] The wireless charging module includes a transmitter and a receiver, such as figure 1 shown. A buck module is often added at the receiving end. The buck module stabilizes the charging voltage / current by detecting its own output voltage / current and closed-loop adjustment, and realizes effective and ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/10H02J50/80H02J7/00
CPCH02J7/0029H02J50/10H02J50/80
Inventor 何智林钊胡锦敏
Owner 深圳赫兹创新技术有限公司
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