Double-channel wireless power supply system constant current output method based on composite coil

Abstract

The invention provides a composite coil which comprises a DD coil, a solenoid coil and a magnetic core, the DD coil is a bipolar coil, two sub-coils of the DD coil are equal in size and opposite in winding direction, and a generated magnetic field is distributed along a coil axis, the magnetic core is arranged below the DD coil, the solenoid coil is wound on the DD coil in parallel, the solenoid coil is a multi-turn rectangular winding, and the solenoid coil and the magnetic core form a solenoid structure. The invention further provides a double-channel wireless power supply system constant current output method based on the coil. Through matching the impedance value of a load, the self-inductance of a transmitting solenoid coil, the resonance inductance of a receiving end, the mutual inductance between a transmitting DD coil and a receiving DD coil, which changes along with the offset in the X direction, and the mutual inductance between a transmitting solenoid coil and the receivingDD coil, which changes along with the offset in the X direction, when the transmitting coil and the receiving coil deviate, the current passing through the load is still kept constant. According to the invention, the defect that the current is seriously reduced under the condition that the transmitting coil and the receiving coil of a traditional WPT system deviate is overcome, the material utilization rate of the resonant inductor is improved, and the space occupied by the transmitting coil is saved.

Description

technical field [0001] The invention relates to wireless power transmission technology, in particular to a constant current output method of a dual-channel wireless power supply system based on a composite coil. Background technique [0002] Wireless power transmission technology is a technology that uses high-frequency magnetic fields to achieve energy transmission. Compared with traditional wire transmission methods, it can avoid insulation problems and safety hazards caused by sparks, and is especially suitable for special applications such as mines and underwater , has high flexibility and reliability, so it has received more and more attention. In the wireless power transfer system of the traditional concept, the receiving coils are all facing the transmitting coils. However, in practical applications, it is impossible to ensure that the transmitting and receiving coils are facing each other at all times. The offset between the transmitting coil and the receiving coil ...

AI Technical Summary

Problems solved by technology

However, in practical applications, it is impossible to ensure that the transmitting and receiving coils are facing each other at all times. The offset between the transmitting coil and the receiving coil will have a great impact on the transmission efficiency of electric energy. Therefore, the anti-offset ability of the system appears extremely important

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