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

A technology of wireless power transmission and fault tolerance range, applied in the direction of transformer/inductor magnetic core, transformer/inductor components, transformers, etc. Small electromagnetic interference, wide application, improved coupling effect

Active Publication Date: 2018-08-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Embodiment 1

[0033]In this embodiment, the loose magnetic coupling transformer is composed of a primary side as a transmitting side and a secondary side as a receiving side, and both the primary side and the secondary side include a loose magnetic coupling transformer part and a corresponding circuit part.

[0034] Figure 4 For wireless power transmission loose magnetic coupling transformer structure, including transmitting end metal plate 130, transmitting end insulating plate 140, transmitting end magnetic core 120, transmitting end coil 110, receiving end metal plate 230, receiving end coils 210 and 211, receiving end The magnetic core 220 and the insulating plate 240 at the receiving end. The transmitting and receiving device of the loose magnetic coupling transformer is formed by winding multiple litz wires in parallel, especially in this embodiment, the transmitting coil 110 is uniformly wound on the upper and lower surfaces of the insulating plate; the receiving coils 210 and 211 a...

Embodiment 2

[0043] Figure 7 For wireless power transmission loose magnetic coupling transformer structure, including transmitting end metal plate 130, transmitting end insulating plate 140, transmitting end magnetic core 120, transmitting end coils 110 and 111, receiving end metal plate 230, receiving end coil 210, receiving end The magnetic core 220 and the insulating plate 240 at the receiving end. The transmitting and receiving device of the loose magnetic coupling transformer is formed by winding multiple Litz wires in parallel. Especially in this embodiment, the receiving coil 210 is uniformly wound on the upper and lower surfaces of the insulating board, and the transmitting coils 110 and 111 are alternately wound on one side of the insulating board, and the arrangement of the coil positions should make the two coils Physical decoupling is achieved, that is, the mutual inductance between the two coils is approximately zero. In addition, the metal plate 130 at the transmitting end...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/14H01F27/24H01F27/255H01F27/28H01F27/32H01F27/36H02J50/10H02J50/70
CPCH01F27/24H01F27/255H01F27/2823H01F27/324H01F27/36H01F38/14H02J50/10H02J50/70
Inventor 马皓张朱浩伯唐云宇
Owner ZHEJIANG UNIV
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