MCR-WPT system resonance point configuration method based on modal analysis theory
A MCR-WPT, modal analysis technology, applied in the direction of circuit devices, electrical components, etc., can solve problems such as complex correspondence, sudden drop in system efficiency, and sharp increase in output current, and achieve simple configuration methods, strong versatility, and guaranteed tuning effect of effect
Pending Publication Date: 2021-04-16
JIANGNAN UNIV
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[0003] The MCR-WPT system is essentially a multi-degree-of-freedom vibration system. The resonance between the coils can only be achieved at a specific transmission distance and frequency. The system is extremely sensitive to transmission distance and frequency, and slight changes in parameters will cause detuning, resulting in The power efficiency of the system drops sharply and the output current surges. In order to maintain the resonance of the system, the electrical parameters of the system are generally compensated through the control link in the prior art, such as frequency tracking control, impedance matching, and adjustment of coil coupling strength. Although the control link can make The MCR-WPT system resonates, but the output power of the system is difficult to maintain the original level after tuning, and the tuning effect is not ideal
The power-frequency characteristics of the MCR-WPT system are jointly determined by multiple electrical parameters of the system, and the corresponding relationship is very complicated. The existing modeling theories of the MCR-WPT system (circuit theory, coupled mode theory, etc.) The corresponding relationship of the parameters makes it impossible to accurately configure the resonance point of the system, so that the tuning effect cannot be guaranteed
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[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0033] This embodiment discloses a method for configuring resonance points of an MCR-WPT system based on modal analysis theory, including the following steps:
[0034] 1) Determine whether the MCR-WPT system belongs to the first type, if the MCR-WPT system belongs to the first type, then perform step 2), otherwise, perform step 5);
[0035] The first type is: the number of coupled inductor coils n≤3, and only the MCR-WPT system with variable coupling coefficient;
[0036] It can be understood that the MCR-WPT system that does not belong to the first type is a system that limits some electrical parameters or a system that does not limit electrical parameters, for example, a multi-c...
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The invention discloses an MCR-WPT system resonance point configuration method based on a modal analysis theory, and the method comprises the following steps: judging whether an MCR-WPT system belongs to a first type or not, building a modal analysis model of the MCR-WPT system if the MCR-WPT system belongs to the first type, and obtaining an electrical parameter expression and a modal index expression according to the modal analysis model, establishing a corresponding relationship between the electrical parameter expression and the modal index expression, and calculating a mutual inductance value between the coupling inductance coils; and if the MCR-WPT system does not belong to the first type, establishing a fitness function, establishing an electrical parameter matrix, and optimizing the fitness function and the electrical parameter matrix by adopting a PSO algorithm so as to obtain a feasible solution of the electrical parameter matrix meeting the resonance point configuration requirement. According to the invention, the system resonance point can be accurately configured, and the tuning effect is ensured.
Description
technical field [0001] The invention relates to the technical field of wireless power transmission, in particular to a method for configuring resonance points of an MCR-WPT system based on modal analysis theory. Background technique [0002] The MCR-WPT (Magnetically Coupled Resonant Wireless Power Transfer) system can meet the needs of large output power and high-efficiency wireless transmission at medium distances. Therefore, the system is widely used in implanted medical equipment, electric vehicles, Household appliances and other fields have been industrialized. [0003] The MCR-WPT system is essentially a multi-degree-of-freedom vibration system. The resonance between the coils can only be achieved at a specific transmission distance and frequency. The system is extremely sensitive to transmission distance and frequency, and slight changes in parameters will cause detuning, resulting in The power efficiency of the system drops sharply and the output current surges. In ...
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Inventor 沈艳霞赵越赵芝璞
Owner JIANGNAN UNIV
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