Dynamic active flux leakage shielding device and method

A magnetic shielding and source-drain technology, applied in active shielding, magnetic/electric field shielding, circuit devices, etc., can solve the problems of increased system complexity, weak magnetic flux leakage shielding ability, and increased cost, so as to reduce magnetic flux leakage emission and cost The effect of solving and reducing the impact
CN108394286AInactive Publication Date: 2018-08-14NIO ANHUI HLDG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NIO ANHUI HLDG CO LTD
Publication Date
2018-08-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the technical field of wireless charging, in particular to a dynamic active flux leakage shielding device and method. The device comprises a magnetic field detecting unit, anexcitation source and an excitation coil; the magnetic field detecting unit is used for detecting the intensity of a leakage magnetic field and acquiring a flux leakage compensation value; and the excitation source is used for driving the excitation coil to generate a magnetic field of the compensation value to counteract the leakage magnetic field. Leakage magnetic flux can be adjusted dynamically, flux leakage transmission is reduced greatly on the premise of not affecting transmitting power and efficiency of a wireless magnetic field, and influence of flux leakage radiation to human bodiesis relieved.
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Description

technical field

[0001] The invention relates to the technical field of wireless charging, in particular to a dynamic active magnetic leakage shielding device and method. Background technique

[0002] The rapid development of electric vehicles has put forward higher requirements for charging facilities. At present, whether it is a DC charging pile or an AC charging pile, the power transmission uses traditional wired cables. In high-power occasions, the size, price and weight of cables It may become unbearable. The emergence of wireless charging technology (WPT) can better solve the above problems. Its energy transmission is through non-contact long-distance transmission, which greatly expands the application occasions of power transmission. The development prospect of the energy transmission mode. However, while WPT brings convenience, it also introduces new problems. Since the essence of wireless charging is to transfer energy by magnetic coupling between coils, and usually...

Claims

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