Four-coil receiving device improving mobile wireless electric energy transmission quality, and application of four-coil receiving device

Abstract

The invention provides a four-coil receiving device improving mobile wireless electric energy transmission quality, and the device comprises a four-coil receiving structure and an outer rectification circuit. Each two of the coils serve as one group, and the winding directions of the coils of each group are opposite. The coils in the same group are corresponding to different magnetic field polarities at the same moment, and the distance between the two groups of coils is one fourth of the length of the receiving device in space. The two groups of coils are respectively corresponding to the peak and valley of a spatial magnetic field at the angle of the magnetic field. The output end of the two groups of coils are respectively connected with one rectification circuit, and are selectively connected in series or in parallel according to the load conditions. When the two groups of coils are connected in series, the voltages obtained by the two groups of coils through the magnetic field are overlapped, thereby obtaining a higher output voltage. When the two groups of coils are connected in parallel, the loading capability of a wireless transmission secondary side is enabled to be stronger, and more stable power is supplied to a load. The device is widely used in the field of electric car mobile charging, effectively inhibits the fluctuation of the charging voltage of an electric car in a moving process, enables the transmission process of energy to be more stable, and provides a new technical means for the mobile charging of the electric car.

Description

technical field [0001] The invention relates to the technical field of circuit design and magnetic circuit design, and belongs to the field of bipolar mobile wireless power transmission, in particular to a four-coil receiving device for improving the quality of mobile wireless power transmission and its application. Background technique [0002] Wireless charging technology is committed to cutting off the "last section" of wires that plague people's lives, and will bring great convenience and changes to people's lives. In the smart home of the future, household appliances will be placed freely without being bound by wires, and the wireless charging table will make all smart terminals no longer need to drag the charger with wires. Fossil energy is being exhausted day by day, environmental pollution is increasingly affecting people's lives, and the call for electric vehicles to replace fuel vehicles is getting louder and louder. Wireless charging roads will make electric vehic...

AI Technical Summary

Problems solved by technology

For wireless power transmission on the move, because the position of the power receiving target (equipment that receives or consumes power, such as electric bicycles, electric vehicles, etc.) is moving rapidly, in order to improve the overall magnetic circuit situation in the actual application process Polarity-separated transmitting mechanisms are often used, but in actual operation, the voltage induced by the secondary side will fluctuate significantly, which seriously affects the quality of wireless energy transmission, and at the same time will damage the energy storage device, affecting the safety of electric vehicles and other equipment. Effect

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