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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

Inactive Publication Date: 2018-08-14
NIO ANHUI HLDG CO LTD
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Problems solved by technology

Its biggest defect is that its magnetic flux leakage shielding ability is weak. The magnetic flux leakage shielding ability is related to the structure of the shielding body. Once the structure is fixed, it cannot be adjusted.
[0004] Chinese patents CN201420287027.9 and CN201410239535.4 disclose a passive shielding scheme, which offsets magnetic flux leakage by adding compensation capacitors, but the disadvantage is that the introduction of capacitors increases the complexity of the system while increasing the cost

Method used

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  • Dynamic active flux leakage shielding device and method
  • Dynamic active flux leakage shielding device and method

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Embodiment Construction

[0027] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0028] see figure 1 As shown, this embodiment provides a dynamic active magnetic flux leakage shielding device, which is an active magnetic flux leakage shielding device that shields the leakage magnetic field based on the principle of positive and negative cancellation based on the magnetic field intensity vector H.

[0029] In the device, 1 and 2 are the input coil and the output coil in the wireless charging structure of electric vehicles respectively, and the magnetic coupling structure can be DD structure, DDQ structure or other suitable coupling structures; 6 is the leakage magnetic field shielding coil (Also known as excitation coil), which is installed on both sides of the main coil 1; 5 is the excitation source to drive the leakage magnetic field shielding coil; the excitation source 5 can be a voltage source or a cur...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18H05K9/00
CPCB60L53/12B60L53/38H05K9/00H05K9/0071H02M1/44H02J50/70Y02T10/70Y02T10/7072Y02T90/12Y02T90/14
Inventor 陈小宇谭广志郭磊朱跃
Owner NIO ANHUI HLDG CO LTD
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