LCC-SSS compensation circuit structure for four-coil magnetic coupling resonance 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: 2021-01-19
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 in conjunction with the accompanying drawings and specific embodiments.
[0054] figure 1 It is a structural diagram of the four-coil MCR-WPT system of the present invention. The four-coil MCR-WPT system consists of four coils, which are the transmitting drive coil, the transmitting relay coil, the receiving relay coil and the receiving load coil in sequence. The coils and capacitors resonate during operation, and the coils are coupled in pairs. Among them, the transmitting drive coil and the receiving load coil are single-turn coils wound by wires, and the single-turn coil resonates with the compensation capacitor set in the circuit; while the transmitting relay coil and receiving relay coil are multi-turn helical coils, and the relay coil has a high Quality factor. There is a parasitic capacitance between the lines, and the coil inductance and parasitic capacitance resonate during high-frequency induction. Res...
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The invention discloses an LCC-SSS compensation circuit structure for a four-coil magnetic coupling resonance wireless power transmission system, and the structure comprises a four-coil MCR-WPT systemwhich is formed by the sequential arrangement of a transmitting drive coil, a transmitting relay coil, a receiving relay coil and a receiving load coil. The transmitting drive coil is connected withan inverter through an LCC resonance circuit, and the receiving load coil is connected with a load. According to the present invention, on the premise of not influencing the stability and safety of the system, an input series resistance is canceled, and the problem that the transmission efficiency of the system is lower due to the input series resistance of the four-coil MCR-WPT system under an SSSS compensation network, is solved. Due to the existence of the input series resistance, the maximum transmission efficiency of the four-coil MCR-WPT system with the SSSS compensation network does notexceed 80%, while the maximum transmission efficiency of the four-coil MCR-WPT system with the LCC-SSS resonance compensation circuit can reach 95%, so that the transmission efficiency of the systemis effectively improved.
Description
technical field [0001] The invention belongs to the technical field of wireless power transmission, and relates to an LCC-SSS compensation circuit structure used in 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 type wireless power transmission (MCR-WPT) has certain advantages in small and medium power and medium distance transmission. Advantage. The commonly used MCR-WPT system structure mainly includes two-coils, three-coils, four-coils 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
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