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A wireless power supply transmitter control method, device and wireless power supply system

A wireless power supply and control system technology, applied in the direction of circuit devices, electrical components, etc., can solve the problems that are easily affected by the external environment (such as temperature) and change, K1, K2 heat, damage K1, K2, etc.

Active Publication Date: 2020-02-21
ZONECHARGE (SHENZHEN) WIRELESS POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the inductance value of the resonant coil and the capacitance value of the resonant capacitor are easily affected by the external environment (such as temperature) and change, the resonant frequency of the resonant ring deviates from the theoretical value F1 at this time, so that the current and voltage waveforms at point A1 Both deviate from the theoretical current and voltage waveforms respectively. At this time, the actual zero-crossing moment of the current at point A1 is no longer the original theoretical zero-crossing moment. At this time, if K1 and K2 are controlled according to the original current zero-crossing moment, then Cause K1, K2 to heat up seriously, and even damage K1, K2

Method used

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  • A wireless power supply transmitter control method, device and wireless power supply system
  • A wireless power supply transmitter control method, device and wireless power supply system
  • A wireless power supply transmitter control method, device and wireless power supply system

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Please refer to figure 2 , figure 2 A flow chart of a wireless power supply transmitter control method provided by the present invention, which is applied to a wireless power supply system, includes:

[0018] Step 1: Obtain the waveform of the electrical signal of the resonant circuit of the resonant ring in the wireless power supply system, where the electrical signal includes voltage and current;

[0019] It can be understood that the wireless power supply system includes a transmitter and a receiver. For details, please refer to figure 1 , where the transmitting end includes a control system and a resonant ring. The resonant ring includes a resonant coil L and a resonant capacitor C. The resonant capacitor C includes a first resonant capacitor C1 and a second resonant capacitor C2. The control system includes a logic control unit, a sampling analysis unit, a first switch K1 and a second switch K2.

[0020] Specifically, the electrical signal on the resonance cir...

Embodiment 2

[0035] On the basis of the previous embodiment:

[0036] As a preferred embodiment, after the time is determined, the process of controlling the turn-on or turn-off of the corresponding switch in the wireless power supply system is:

[0037] When the voltage reaches the maximum value and the current crosses zero from positive to negative, the second switch K2 in the wireless power supply system is controlled to be turned on and the first switch K1 is turned off.

[0038] Specifically, when the voltage reaches the maximum value and the current crosses zero from positive to negative, the first resonant capacitor C1 is completely discharged through the first switch tube K1, and the power supply VDD is completely charged to the resonant capacitor C2 through the first light switch K1. The first switching tube K1 is turned off, and the second switching tube K2 is turned on.

[0039] As a preferred embodiment, after the time is determined, the process of controlling the turn-on or t...

Embodiment 3

[0048] Please refer to Figure 5 , Figure 5 A schematic structural diagram of another wireless power supply transmitter control device provided by the present invention, which is applied to a wireless power supply system, including:

[0049] The acquisition unit 1 is configured to acquire the waveform of the electrical signal of the resonant circuit of the resonant ring in the wireless power supply system, where the electrical signal includes voltage and current;

[0050] The processing unit 2 is used to determine the moment when the voltage on the resonant main circuit reaches the maximum value and the current crosses zero from positive to negative and the zero crosses from negative to positive according to the waveform of the electrical signal;

[0051] The control unit 3 is configured to control the turn-on or turn-off of the corresponding switches in the wireless power supply system after the time is determined.

[0052] As a preferred embodiment, the control unit 3 is ...

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PUM

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Abstract

The present invention discloses a wireless power supply transmitting terminal control method. The method comprises: obtaining waveform of electric signals of a resonant tank of a resonant ring in a wireless power supply system, wherein the electric signals comprise voltage and / or current; determining the moment of voltage on a resonant major loop reaching an extreme value according to the waveform of the electric signals and / or the moment of the current passing through zero from positive to negative and the moment of the current passing through zero from negative to positive; and after determining the moment, controlling the connection or the disconnection of a corresponding switch tube in the wireless power supply system. The obtained waveform of the electric signals of the resonant tank of the resonant ring in the wireless power supply system is employed to determine the actual moment of voltage on the resonant major loop reaching the extreme value and / or the current passing through zero, the connection or the disconnection of the corresponding switch tube is controlled according to the actual moment, and therefore, whatever the external environment happens, the switch tube is still located at the lowest switch loss so as to improve the power supply efficiency. The present invention further discloses a wireless power supply transmitting terminal control device and a wireless power supply system which have the advantages mentioned above.

Description

technical field [0001] The present invention relates to the technical field of wireless power supply, in particular to a method and device for controlling a wireless power supply transmitting end and a wireless power supply system. Background technique [0002] With the development of science and technology, wireless power supply technology has been greatly developed, and wireless power supply systems have been applied to more and more fields. The wireless power supply system includes a transmitter and a receiver, and the transmitter includes a control system and a resonant ring. [0003] Specifically, please refer to figure 1 , figure 1 A schematic structural diagram of a wireless power supply transmitting end provided in the prior art. The control system of the transmitting end includes a logic control unit, a sampling and analyzing unit, a first switching tube K1 and a second switching tube K2, wherein K1 and K2 are turned on alternately. The resonant ring at the tran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12
Inventor 梁展春
Owner ZONECHARGE (SHENZHEN) WIRELESS POWER TECH CO LTD