The structure of lcc-sss compensation circuit for four-coil magnetic coupling resonant wireless power transmission
A magnetic coupling resonance, wireless power transmission technology, applied in circuit devices, electrical components, multi-terminal network and other directions, can solve the problem of low transmission efficiency of the system, and achieve the effect of improving transmission efficiency
Active Publication Date: 2022-08-02
XIAN UNIV OF TECH
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[0004] The purpose of the present invention is to design a LCC-SSS compensation circuit structure for four-coil MCR-WPT system, aiming at the problem that the input series resistance in the SSSS compensation network makes the system transmission efficiency low, the present invention is used for four-coil MCR-WPT system The LCC-SSS compensation circuit structure of the WPT system cancels the input series resistance without affecting the stability and safety of the system. The inductance coefficient is determined through the transmission efficiency and output power curve of the system, and the LCC-SSS resonant circuit is given The selection method of compensation inductance and compensation capacitance
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[0053] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0054] figure 1 It is the structure diagram of the four-coil MCR-WPT system of the present invention. The four-coil MCR-WPT system is composed of four coils, which are respectively a transmitting driving coil, a transmitting relay coil, a receiving relay coil and a receiving load coil. Among them, the transmitting driving coil and the receiving load coil are single-turn coils wound by wires, and the single-turn coils resonate with the compensation capacitor set in the circuit; while the transmitting and receiving relay coils are multi-turn spiral coils, and the relay coils have higher Quality factor. There is parasitic capacitance between the lines. The coil inductance and parasitic capacitance resonate during high-frequency induction. The resonant frequency of the coil is determined by the structure of the coil itself. When the relay coil is...
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The invention discloses an LCC-SSS compensation circuit structure for a four-coil magnetically coupled resonance wireless power transmission system, including a four-coil MCR-WPT system. The four-coil MCR-WPT system consists of a transmitting driving coil, a transmitting relay coil, a receiving relay coil and a receiving The four coils of the load coil are arranged in sequence, the transmitting and driving coils are connected with an inverter through the LCC resonant circuit, and the receiving load coils are connected with a load. The invention cancels the input series resistance without affecting the stability and safety of the system, and solves the problem of low system transmission efficiency caused by the input series resistance of the four-coil MCR-WPT system under the SSSS compensation network. Due to the existence of the input series resistance, the maximum transmission efficiency of the four-coil MCR‑WPT system with SSSS compensation network does not exceed 80%, while the four-coil MCR‑WPT system with LCC‑SSS resonant compensation circuit can reach 95%, effectively improving the transmission efficiency of the system.
Description
technical field [0001] The invention belongs to the technical field of wireless power transmission, and relates to an LCC-SSS compensation circuit structure for a four-coil magnetic coupling resonance wireless power transmission system. Background technique [0002] In recent years, wireless power transmission technology has become more and more widely used in non-contact power transmission applications such as power transmission, electric vehicles, medical care, mobile phones, and computers due to its advantages of safety and convenience. The main types of wireless power transmission are magnetic induction type (ICPT), magnetic coupling resonance type (MCR), capacitive power transmission (CPT), etc. Among them, magnetic coupling resonance wireless power transmission (MCR-WPT) has certain characteristics for small and medium power and medium distance power transmission. Advantage. The commonly used MCR-WPT system structure mainly includes two-coil, three-coil, four-coil and...
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IPC IPC(8): H02J50/12H03H7/01
CPCH02J50/12H03H7/01
Inventor 孙向东陈泽驰王之轩任碧莹
Owner XIAN UNIV OF TECH