Magnetically coupled resonance type wireless power transmission controllable-inductance tuning unit

A resonant radio and tuning device technology, applied in the direction of circuit devices, electrical components, electromagnetic wave systems, etc., can solve the problems of high-frequency detuning transmission efficiency instability, etc., achieve small electromagnetic interference, solve high-frequency detuning, and high transmission efficiency effect

Inactive Publication Date: 2013-06-26
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a controllable inductance tuning device for magnetically coupled resonant wireless power transmission to solve the problem of unstable transmission efficiency caused by high-frequency detuning and coupling state changes in the existing magnetically coupled resonant wireless power transmission

Method used

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  • Magnetically coupled resonance type wireless power transmission controllable-inductance tuning unit
  • Magnetically coupled resonance type wireless power transmission controllable-inductance tuning unit
  • Magnetically coupled resonance type wireless power transmission controllable-inductance tuning unit

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Embodiment Construction

[0022] Hereinafter, the present invention will be further described in detail by taking the two-coil structure magnetically coupled resonant wireless power transmission as an example, with reference to the accompanying drawings and specific implementation methods.

[0023] see image 3 A controllable inductance tuning device for magnetically coupled resonant wireless power transmission includes two antiparallel controllable reactors, and the controllable reactors include a current controller and a reactor. The controllable inductance tuning device is connected to the LC resonant circuit formed by the resonant capacitance and the coil inductance of electric energy transmission, which can compensate the equivalent inductance generated by the parameter change of the resonant circuit.

[0024] The reactor includes a DC winding and an AC winding and shares a magnetic circuit; the DC winding is connected to the output of the current controller, and is controlled by the phase differe...

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Abstract

A magnetically coupled resonance type wireless power transmission controllable-inductance tuning unit comprises two controllable reactors reversely connected in parallel. Each controllable reactor comprises a current controller and a reactor, the reactor comprises a direct current winding and an alternating current winding which share a magnetic circuit, and the direct current winding is connected with output of the current controller and is controlled through phase difference between voltage and current in a resonance circuit. The magnetically coupled resonance type wireless power transmission controllable-inductance tuning unit is used for compensating detuning in magnetically coupled resonance type wireless power transmission, or allowing the resonance circuit to re-resonate under a new frequency. The input current of the direct current windings of the reactors is controlled through the phase difference between voltage and current in the resonance circuit, the inductance of the alternating current windings is changed, the alternating current windings are connected to the resonance circuit, and the variable inductance is used to compensate detuning of the resonance circuit caused by parameter change.

Description

technical field [0001] The invention belongs to the field of non-contact electric energy transmission, and relates to a phase-controlled capacitance tuning device for magnetically coupled resonant wireless energy transmission. Background technique [0002] Magnetic coupling resonant wireless power transmission is one of the three methods of non-contact power transmission (electromagnetic induction, magnetic coupling resonance, electromagnetic wave). This kind of power transmission uses the alternating electromagnetic field as the medium, and the transmitting electromagnetic field circuit and the receiving electromagnetic field circuit resonate separately, and the resonant frequency of the two circuits is the same to achieve resonance, so as to achieve "meter" level and higher efficiency power transmission. [0003] figure 1 , figure 2 These are two coil modes for magnetically coupled resonant wireless power transfer. in, figure 1 It is a two-coil structure, figure 2 I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J17/00H02J50/12
Inventor 辛文辉华灯鑫宋跃辉汪丽侯逢勃
Owner XIAN UNIV OF TECH
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