Three-dimensional space multi-node power balance wireless power supply system and method

Abstract

The invention discloses a three-dimensional space multi-node power balance wireless power supply system and method. For a system with a disk spiral structure, a transmitting coil is placed under receiving coils at the same height in a three-dimensional space, and therefore, the receiving coils at the same height are symmetrically arranged around the axis of the corresponding transmitting coil. Intransmitting coils of different heights, only a transmitting coil of the lowest layer is energized, and the rest transmitting coils are used as relay transmitting coils and are not energized. When power is supplied, firstly, a correspondence relationship that the mutual inductance changes with a distance between the transmitting coils and the relay transmitting coils is established, a limiting condition of a mutual inductance value between the transmitting coils and the relay transmitting coils when all load receiving power are the same is determined, then the loop resistance of the transmitting coils and the relay transmitting coils is weakened or enhanced to adjust the mutual inductance value between two coils satisfying the limiting condition, therefore, the mutual inductance value conforms to the correspondence relationship with the distance between the coils, and power balanced wireless power supply is realized. The disadvantage of excessive current at a power supply terminal during power equalization is overcome.

Description

technical field [0001] The invention relates to wireless energy transmission technology, in particular to a three-dimensional space multi-node power balanced wireless power supply system and method. Background technique [0002] Direct contact of wires is the main way of power transmission, but this way will inevitably cause transmission loss, and factors such as line aging and tip discharge can easily cause electric sparks, which greatly reduces the reliability and safety of equipment power supply. Wireless charging technology can solve the limitations of charging infrastructure and the above-mentioned security issues faced by traditional charging, and has attracted great attention from researchers. In order to further improve the utilization rate of wireless charging, people envisage various three-dimensional space multi-node power supply systems, such as wireless charging systems for electric vehicles in multi-storey three-dimensional garages, wireless charging systems fo...

AI Technical Summary

Problems solved by technology

Increasing the input current of the transmitting coil can keep the multi-load power balance of each layer, but the current requirements provided by the front-end drive power supply are relatively high, and it is difficult to implement

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