Magnetic leakage field shield method of wireless electric energy transmission system

Abstract

The invention discloses a magnetic leakage field shield method of a wireless electric energy transmission system. The method employs a magnetic leakage field shield apparatus of the wireless electric energy transmission system. The apparatus comprises a power transmission end coil and a power receiving end coil which are in parallel arrangement. A magnetic leakage field shield device is vertically arranged at one side of the power transmission end coil and the power receiving end coil, an electrical device and people are respectively arranged at the other side of the magnetic leakage field shield device. The method provided by the invention solves the problems of unadjustable shield capability and poor shield tracking performance of a passive shield device in a passive shield method, and solves the problems of quite large loss power and incapability of forming a closed loop self-adjusting shield effect in an active shield method. The magnetic leakage field size of the wireless electric energy transmission system is detected by use of a single-chip microcomputer, according to a magnetic leakage field value, the input size of the parallel capacitor combination of a passive coil is given through calculating, and a magnetic leakage field shield function is realized in a dynamic closed loop mode, such that the unfavorable influences caused by an electromagnetic field to surrounding human bodies and electrical devices are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission and electromagnetic compatibility, and in particular relates to a leakage magnetic field shielding method of a wireless power transmission system. Background technique [0002] In recent years, wireless power transmission technology has developed rapidly, and its application range is wider and wider. Its energy transmission can realize non-contact long-distance transmission, which greatly expands the application occasions of power transmission. It is a kind of technology with broad development prospects. way of energy transmission. The leakage magnetic field generated between the transmission coil and the power receiving coil of the wireless power transmission equipment will cause electromagnetic pollution to the surrounding environment, which cannot be ignored, and directly hinders the development and application of wireless power transmission technology. At present, the supp...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a leakage magnetic field shielding method for a wireless power transmission system, which solves the problem that the passive shielding method has a fixed shielding ability and cannot dynamically adjust the shielding ability; it also solves the problem that the active shielding method has a large loss

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