Winding coil, winding method thereof and wireless electric energy transmission device

Abstract

The invention provides a winding coil, a winding method thereof and a wireless electric energy transmission device, and belongs to the technical field of wireless electric energy transmission. And a device insulation risk caused by high interlayer voltage stress of the winding is prevented. The transformer comprises a winding coil, an aluminum plate and a magnetic material, the magnetic material is arranged in the aluminum plate, the winding coil is connected with the aluminum plate, and the winding coil is wound between an upper layer and a lower layer in a crossed mode. The wire rod is mainly used for reducing the voltage stress between winding layers to hundred volts, and the use requirement can be met by using the self-insulation of the wire rod.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission, and in particular relates to a winding coil, a winding method thereof, and a wireless power transmission device. Background technique [0002] The existing magnetic field coupling wireless power supply technology, due to the cross limitation of physical dimensions such as the wire diameter, the length and width of the magnetic coupling mechanism, and the air gap, causes the mutual inductance to fail to meet the requirements when the flat coil is wound with a single turn, or due to the The increased overall losses and diminishing marginal returns caused by the inner layer winding process make the single-layer densely wound flat coil scheme significantly inferior to the double-layered flat coil winding scheme. [0003] However, in the current double-layered winding, the flat coil is firstly wound clockwise or counterclockwise from the first layer, and then the second layer is wo...

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Problems solved by technology

[0002] The existing magnetic field-coupled wireless power supply technology, due to cross restrictions on physical dimensions such as wire diameter, length and width of the magnetic coupling mechanism, and air gap, leads to the fact that the mutual inductance cannot meet the requirements in the case of single-turn winding of the flat coil or due to the The overall loss increase and diminishing marginal returns caused by the inner layer winding process lead to the single-layer densely wound planar coil scheme being significantly inferior to the double-layer stacked planar coil winding scheme

[0003] However, the current double-layer winding is a flat coil that is first wound clockwise or counterclockwise from the first layer, and then the second layer is wound. This winding method will cause a large voltage stress between the two layers, and the incoming and outgoing wires The terminal is the voltage stress U of the resonant cavity, and the maximum value of the interlayer voltage stress of the winding is at least U / 2. Under the voltage stress of thousands of volts, the interlayer voltage stress of the winding is also in the kilovolt level, and the risk of interlayer insulation of the coil is relatively large.

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