Apparatus and method for frequency tracking of wireless energy transfer system

A technology of wireless energy transmission and system frequency, applied in the direction of circuit devices, electrical components, etc., can solve problems such as high cost and complex hardware parts, and achieve the effects of improving transmission power and efficiency, high robustness, and reducing costs

Active Publication Date: 2019-12-13
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
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Problems solved by technology

This method requires two AC sampling circuits to simultaneously collect high-frequency voltage and current signals, and a phase detector to measure the phase difference. The hardware part is more complicated and the cost is high.

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  • Apparatus and method for frequency tracking of wireless energy transfer system
  • Apparatus and method for frequency tracking of wireless energy transfer system
  • Apparatus and method for frequency tracking of wireless energy transfer system

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Embodiment Construction

[0048] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0049] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention discloses an apparatus and method for the frequency tracking of a wireless energy transmission system, and belongs to the technical field of wireless energy transmission. The apparatus of the present invention comprises a high-frequency inversion circuit, an LC resonance circuit, a current detection circuit, a signal conditioning circuit, a digital signal processor and a PWM drivingcircuit; the digital signal processor receives square wave signals outputted by the signal conditioning circuit, preprocesses the square wave signals, outputs PWM driving signals, transmits the PWM driving signals to the PWM driving circuit; and the PWM driving circuit drives the high-frequency inversion circuit to adjust the resonant frequency of acquired alternating current. With the apparatus and method of the invention adopted, the problem that a primary transmitting coil loop is detuned is solved; the LC resonance loop always works in a resonance state; and it is guaranteed that the wireless energy transmission system is always in a resonance state. According to the apparatus and method of the invention, the problems of unstable energy transmission and low efficiency caused by the detuning of the wireless energy transmission system are solved, so that the stability of the energy output of the system is ensured.

Description

technical field [0001] The present invention relates to the technical field of wireless energy transmission, and more specifically, to a device and method for frequency tracking of a wireless energy transmission system. Background technique [0002] The inductive wireless charger transmits energy through the electromagnetic wave transmitting coil. In order to ensure efficient energy transmission, the electromagnetic wave transmitting coil must work in a resonant state. [0003] Due to external environmental interference or instrument error, the impedance of the line will change, which will cause changes in system parameters, resulting in changes in the resonant frequency of the sending end, reducing the efficiency of system transmission energy. In order to make the transmitting end always work in the resonant state, it is necessary to make the operating frequency of the inverter at the transmitting end track the resonant frequency of the transmitting end at all times. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/20
CPCH02J50/20
Inventor 王松岑王嘉宁何浩吴晓康徐翀魏斌
Owner CHINA ELECTRIC POWER RES INST
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