Wireless electric energy transmission loosen magnetic-coupling transformer device with large offset fault-tolerance range and circuit thereof

Abstract

The invention discloses a wireless electric energy transmission loosen magnetic-coupling transformer device with a large offset fault-tolerance range and a circuit thereof. The device comprises an emission module, a receiving module and a shielding mechanism, wherein the emission module and the receiving module respectively comprises an insulation plate, a strip-shaped magnetic core and a transformer coil, the insulation plate is made of an insulation material, the strip-shaped magnetic coil is fixed by the insulation plate, the transformer coil is formed by winding multiple strands of litz lines in parallel, the coil is wound around an upper surface and a lower surface of the insulation plate to form a spiral structure or are wound around one side to form a single-side staggered structure, and the shielding mechanism has a magnetic leakage shielding effect by a metal plate on a back part of the coil. A primary side and a secondary side of the transformer respectively employ a double-side spiral coil structure and a dual-path staggered coil structure, the dual paths of staggered coils are connected by an external circuit, so that the primary side and the secondary side can achieverelatively high coupling coefficient and relatively high integral efficiency under the condition of relatively large deviation, and the device has relatively small electromagnetic interference and canbe widely an electric vehicle wireless charging system with different power classes.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission, and in particular relates to a wireless power transmission loose magnetic coupling transformer device and a circuit thereof with a large offset tolerance range for wireless charging of electric vehicles. Background technique [0002] Non-contact power transmission mainly uses the principle of magnetic field coupling to realize power transmission, and then realizes wireless charging of electric vehicles, that is, a loose magnetic coupling transformer with completely separated primary and secondary sides is used to transfer power from the transmitter through high-frequency magnetic field coupling. One side is transmitted to the receiving device side through space induction. The wireless charging method does not require the connection of physical lines, which can effectively avoid the risk of short circuit and open circuit caused by environmental factors, and is more suitable for...

AI Technical Summary

Problems solved by technology

[0005] In short, for the application occasions in the field of wireless power transmission today, the main problem existing in the current technology is: on the premise of not increasing the volume of the primary and secondary sides of the transformer, the coupling coefficient between the transmitting coil and the receiving coil is low, and the power transmission efficiency is relatively low. Low; especially when the primary and secondary sides are offset, the coupling coefficient will drop rapidly. Usually, when the offset distance of the primary and secondary sides exceeds 1 / 3 of its own size, the coupling coefficient has dropped to a level that cannot transmit power normally

Images