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Wireless power transfer systems

A technology of wireless power transmission and power transmission, applied in transportation and packaging, electric vehicles, electrical components, etc., can solve the problem of increasing the heating of foreign objects

Pending Publication Date: 2021-11-09
INTDEVICE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the foreign object has low electrical resistance, then the foreign object will start to heat up, and continued exposure to electromagnetic flux increases the risk of the foreign object becoming a heating and / or fire hazard

Method used

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  • Wireless power transfer systems
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Examples

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no. 1 example

[0080] will now refer to Figure 5 and 6 Discuss the first embodiment.

[0081] form figure 2 Part of the system the charging unit 13 can be as Figure 5 and Image 6 shown. Various features of this embodiment will be renumbered relative to previous figures, but still relate to the same aspects as the context dictates. The charging unit 13 of this embodiment includes a circular pad 50 including a housing and at least one wireless power transfer coil 57 . The charging unit 13 has a rotatable sensor arm ("rotatable arm") 54 arranged above a pad 50 on a rotatable actuator (eg, an electric motor). Preferably, the rotatable arm is within the charging unit housing, although this is not required. The rotatable actuator is controlled by a controller (such as image 3 32) in , the controller is arranged in the charging unit 13 or elsewhere in the system. A sensor coil array 55 is arranged on the rotatable arm 54 . The arm is sized to carry the sensor coil array 55 . The sens...

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PUM

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Abstract

Described herein is a charging unit for wireless power transfer. The charging unit comprises at least one coil for inductive power transfer, a sensor coil array with a sensing field for sensing the presence of at least one foreign object, and a controller. The controller is configured to move the sensor coil array and / or sensing field so that the sensing field can scan a sensing region, and configured to detect the presence of the at least one foreign object in the sensing region based on the sensing array output. The sensor coil array and / or sensing field is moveable such that the sensing field can be: a) positioned in the sensing region so that the sensing field does not overlap the at least one foreign object, and also b) positioned in the sensing region so that the sensing field does overlap the at least one foreign object.

Description

technical field [0001] The present invention relates to wireless power transfer systems (charging or real-time power systems) and devices for detecting foreign objects thereon. Background technique [0002] FIG. 1 shows a prior art wireless power transfer charging system 10 for charging an electric vehicle 11 . The charging system comprises a central charging unit 12 having a power source 9 and a controller 8 for controlling the supply of power to the electric vehicle 11 and a wireless charging unit 13 which inductively transfers power 15 to the electric vehicle 11. The central charging unit 12 is electrically coupled 16 to the wireless charging unit 13 . The wireless charging unit 13 may take the form of a wireless charging pad 40 including one or more induction coils 14 for transferring power to the electric vehicle 11 . [0003] In operation, the central charging unit 12 induces an alternating current into the induction coil 14 , which produces a varying electromagneti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/124H02J50/10H02J50/60H02J7/00H02J50/40
CPCH02J50/10H02J50/402H02J50/60B60L53/124H02J7/00H02J5/00B60L2270/147H02J50/90B60L53/38
Inventor 于立军
Owner INTDEVICE LTD