Coupled resonator parameter extraction apparatus and extraction method
A parameter extraction and resonator technology, applied in measurement devices, circuit devices, battery circuit devices, etc., can solve the problems of large impedance fluctuation range, large measurement error, and unstable measurement results, so as to improve the extraction accuracy and reduce Measurement cost, the effect of reducing measurement error
Active Publication Date: 2018-05-08
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
When the resonant frequency of the resonator reaches several megahertz to tens of megahertz, the direct measurement method brings the following problems: First, the coil is very sensitive to the surrounding environment, and the distributed capacitance of the coil causes the measurement result to be unstable. When the coil position moves, When the environment changes or the connection accessories change, the measurement results of the impedance measurement equipment change significantly
The second is that the impedance fluctuation range near the resonant frequency is large, which introduces a large measurement error to the measurement results
Third, the range of impedance measured accurately by impedance measuring equipment is limited
Method used
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[0029] specific implementation plan
[0030] The present invention will be further described below in conjunction with specific examples.
[0031] Such as figure 1 As shown, the coupling resonator parameter extraction device provided in this embodiment includes a scattering parameter measurement device, a detection coil, a transmitting resonator and a receiving resonator; the transmitting resonator is composed of a transmitting coil and a transmitting resonant capacitor , connected with a resonant circuit; the receiving resonator is composed of a receiving coil and a receiving resonant capacitor, connected with a resonant circuit; the measurement port of the scattering parameter measuring device is connected with the detection coil via a coaxial cable; the detection coil is in a specific Under a certain detection distance, it is coupled with the transmitting coil or the receiving coil through an electromagnetic field; under a specific transmission distance, the transmitting c...
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The invention discloses a coupled resonator parameter extraction apparatus and an extraction method. The apparatus comprises a scattering parameter measuring device, a detection coil, a transmitting terminal resonator and a receiving terminal resonator. The transmitting terminal resonator is formed by a transmitting coil and a transmitting terminal resonant capacitor which are connected via a resonance circuit. The receiving terminal resonator is formed by a receiving coil and a receiving terminal resonant capacitor which are connected via the resonance circuit. A measuring port of the scattering parameter measuring device is connected to the detection coil through a coaxial cable. The detection coil is coupled to the transmitting coil or the receiving coil via an electromagnetic field under a specific detection distance. The transmitting coil is coupled to the receiving coil via the electromagnetic field under a specific transmission distance. In the invention, measurement equipment and a resonator to be measured are separated, a measurement result is stable and method fitting precision is high, and an estimated and acquired coupled resonator parameter is accurate.
Description
technical field [0001] The present invention relates to the field of wireless power transmission or wireless power transmission technology, in particular to a coupling resonator parameter extraction device and an extraction method thereof. Background technique [0002] The medium and long-distance high-power wireless power transmission system mainly transmits power through the electromagnetic field generated by the coupling of the transmitting coil and the receiving coil. The transmitting coil and the resonant capacitor at the transmitting end form the resonator at the transmitting end, and the resonant capacitor at the receiving end forms the resonator at the receiving end. The device performs complete energy transfer. For a magnetic resonance wireless power transfer system, the operating frequency of the system is consistent with the resonant frequency of the two resonators. Under a specific transmission distance, the ultimate efficiency of the system is determined by the...
Claims
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IPC IPC(8): G01R31/00H02J50/12
CPCH02J7/35H02J50/12G01R31/00Y02T10/70
Inventor 张波周佳丽
Owner SOUTH CHINA UNIV OF TECH