Method and device for detecting resonant current at transmitting end of wireless charging system
A resonant current and wireless charging technology, applied in the direction of using digital measurement technology for measurement, can solve the problems of high control chip requirements, complex resonant current information algorithm, etc., to achieve high real-time, easy to implement, and simple to achieve.
Active Publication Date: 2018-02-02
XJ POWER CO LTD +4
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[0006] The purpose of the present invention is to provide a method and device for detecting resonant current at the transmitting end of a wireless charging system to solve the problems of complex algorithms and high requirements for control chips in the prior art when detecting resonant current information
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[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0049] Such as figure 1Shown is the schematic diagram of the resonant current detection device at the transmitting end of the wireless charging system of the present invention. A detection device for resonant current is set between L and C at the transmitting end, including an acquisition module, a conversion module and a controller, and the acquisition module is connected to the conversion module. The conversion module is connected to the controller; the acquisition module is used to collect the current signal and The current signal at the moment; the conversion module is used to convert the current signal of the previous cycle collected by the acquisition module into a rectangular pulse consistent with its phase; The signal period T is obtained...
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The invention relates to a method and a device for detecting the resonant current at the transmitting end of a wireless charging system. The method includes the following steps: collecting the currentsignals in a precious cycle, and getting the signal cycle T; calculating the time t(phi) corresponding to a to-be-detected phase in the precious cycle, and adding the signal cycle T to t(phi) to getthe time t'(phi) corresponding to the to-be-detected phase in a current cycle; and collecting a current signal at the time t'(phi), and getting the current value of the to-be-detected phase in the current cycle. The method and the device are easy to implement, have high real-time performance, and can quickly lock the frequency, amplitude and effective value of the current high-frequency resonant current and control and protect the wireless charging system.
Description
technical field [0001] The invention belongs to the technical field of wireless charging, and in particular relates to a method and a device for detecting a resonant current at a transmitting end of a wireless charging system. Background technique [0002] At present, wireless charging uses radio wave and electromagnetic induction technology to induce current through the coil in the wireless charger and the coil in the device to be charged, and convert the induced current into an electromagnetic wave signal, and the electromagnetic wave signal is transmitted from the wireless charger to the device to be charged. After the device is installed, the receiving device in the device to be charged converts the received electromagnetic wave signal into the DC power used for charging the device, so as to charge the battery of the device. [0003] Such as figure 1 The structure diagram of the wireless charging system is shown, and its transmission mechanism is: when the LC at the tra...
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IPC IPC(8): G01R19/25
CPCG01R19/25
Inventor 刘振威黄栋杰曹亚边慧萍乔海强张滨邓思维张晓丽雷方涛刘向立李龙光
Owner XJ POWER CO LTD