Efficient wireless electricity transmission system with adjustable power in large range and control method

Abstract

The invention discloses an efficient wireless electricity transmission system with adjustable power in a large range and a control method. The system comprises a direct-current power supply, a high-frequency inverter, an mutual inductance coupling magnetic circuit mechanism, primary side and secondary side reactive compensation mechanisms, a variable load and a power adjusting servo control mechanism. The system is characterized in that a primary side magnetic energy emitting coil is composed of two identical solenoid coils, a secondary side magnetic energy picking coil is located in the center between the two solenoid coils and can revolve around a horizontal axis of the secondary side magnetic energy picking coil in a space, and the secondary side magnetic energy picking coil is connected with the load through the power adjusting servo control mechanism. The system and the control method have the advantages that the rotation angle of the secondary side magnetic energy picking coil can be adjusted through the power adjusting servo control mechanism, and accordingly flexible and adjustable output power and high system efficiency can be achieved in the large range, system loss is reduced, and the system is simple in structure and convenient to control.

Description

technical field [0001] The invention relates to a wireless power transmission system and a control method, in particular to a high-efficiency wide-range power adjustable wireless power transmission system and a control method. Background technique [0002] The wireless power transfer system realizes the wireless transmission of electric energy through loose electromagnetic coupling, but due to the spatial propagation characteristics and strong attenuation characteristics of the magnetic field, the coupling coefficient of the magnetic circuit of the traditional wireless power transfer system is low, resulting in the secondary magnetic energy pickup coil The relative spatial distance from the primary side magnetic energy transmitting coil is very strictly limited, resulting in a small output power adjustment range of the wireless energy transmission system. [0003] In order to improve the adjustment range of the system output power within a certain relative spatial distance a...

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Problems solved by technology

In view of the shortcomings of the above power control methods, Chinese utility model patent 201020277910.1 discloses a power control method for wireless power transmission systems, which realizes effective power regulation and has the advantages of small switching loss and high conversion efficiency, but there are also circuit structures Complicated, difficult to control, and the power adjustment device still has disadvantages such as switching loss

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