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A device and method for frequency tracking of wireless energy transmission system

A technology of wireless energy transmission and system frequency, applied in the direction of circuit devices, electrical components, etc., can solve the problems of complex hardware and high cost, achieve high robustness, improve transmission power and efficiency, and achieve high-precision tuning effects

Active Publication Date: 2022-07-01
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A device and method for frequency tracking of wireless energy transmission system
  • A device and method for frequency tracking of wireless energy transmission system
  • A device and method for frequency tracking of wireless energy transmission system

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Embodiment Construction

[0048] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for this thorough and complete disclosure 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 are not intended to limit the invention. In the drawings, the same elements / elements are given the same reference numerals.

[0049] Unless otherwise defined, terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is to be understood that terms defined in commonly used dictionaries should be construed as having meanings consistent with the context in the related art, and should not be construed as idealized or overly formal meanings.

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Abstract

The invention discloses a device and method for frequency tracking of a wireless energy transmission system, and relates to the technical field of wireless energy transmission. The device of the invention includes: a high-frequency inverter circuit, an LC resonance circuit, a current detection circuit, a signal conditioning circuit, a digital signal processor and a PWM drive circuit, wherein the digital signal processor receives the square wave signal output by the signal conditioning circuit, The square wave signal is preprocessed, the output PWM drive signal is transmitted to the PWM drive circuit, and the high frequency inverter circuit is driven to adjust the resonant frequency of the collected alternating current. The invention solves the problem of detuning of the primary transmitting coil loop, makes the LC resonant loop always work in a resonance state, and ensures that the wireless energy transmission system is always in a resonance state. The invention effectively solves the problems of unstable energy transfer and low efficiency caused by the detuning of the wireless energy transmission system, so as to ensure the stability of the energy output of the system.

Description

technical field [0001] The present invention relates to the technical field of wireless energy transmission, and more particularly, to an apparatus 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 high-efficiency transmission of energy, 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 change the system parameters, and cause the resonant frequency of the transmitter to change, reducing the efficiency of the system to transmit energy. In order to make the transmitter always work in the resonant state, it is necessary to make the operating frequency of the inverter at the transmitter always track the resonant frequency of the transmitter. [0004] However, mo...

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Application Information

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Patent Type & Authority Patents(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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