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Inductive power supply and metal foreign object detection method thereof

An inductive power supply and metal foreign object technology, applied in geophysical surveying, radio wave measurement systems, instruments, etc., can solve problems such as misjudgment of metal foreign objects, inability to effectively identify, and power outages

Active Publication Date: 2018-09-21
FU TONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the above-mentioned methods for identifying metal foreign objects often fail to achieve effective protection functions. For example, when small metal foreign objects such as coins, keys, or paper clips exist within the power transmission range of the power supply end, the above methods may not be able to effectively identify them.
If the critical value of the judgment is set more rigorously, tiny noise interference may be misjudged as a metal foreign object, resulting in unnecessary power failure

Method used

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  • Inductive power supply and metal foreign object detection method thereof
  • Inductive power supply and metal foreign object detection method thereof
  • Inductive power supply and metal foreign object detection method thereof

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Embodiment Construction

[0051] Please refer to figure 1 , figure 1 It is a schematic diagram of an inductive power supply 100 according to an embodiment of the present invention. Such as figure 1 As shown, the inductive power supply 100 includes a power supply module 1 and a power receiving module 2 . The power supply module 1 includes a power supply coil 116 and a resonant capacitor 115 . Wherein, the power supply coil 116 can be used to transmit electromagnetic energy to the power receiving module 2 for power supply, and the resonant capacitor 115 is coupled to the power supply coil 116 and can be used to cooperate with the power supply coil 116 for resonance. In addition, in the power supply module 1 , a magnetic conductor 117 made of magnetic material can be optionally used to enhance the electromagnetic induction capability of the power supply coil 116 and prevent electromagnetic energy from affecting objects in the direction of the non-inductive surface of the coil.

[0052]To control the o...

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Abstract

A method used for an induction type power supply system, for detecting whether an intruding metal exists in a power transmission range of the induction type power supply system, includes interrupting at least one driving signal of the induction type power supply system to stop driving a supplying-end coil of the induction type power supply system; obtaining a first attenuation slope during a first period wherein driving of the supplying-end coil is stopped, and obtaining a second attenuation slope during a second period wherein driving of the supplying-end coil is stopped; and determining whether the intruding metal exists in the power transmission range of the induction type power supply system according to the first attenuation slope and the second attenuation slope.

Description

technical field [0001] The invention relates to a method for an inductive power supply, in particular to a method for detecting whether there is a metal foreign object within the power transmission range of the inductive power supply. Background technique [0002] The inductive power supply includes a power supply terminal and a power receiving terminal. The power supply terminal drives the power supply coil to resonate through the drive circuit, and then emits radio frequency electromagnetic waves, and then receives the electromagnetic wave energy through the coil of the power receiving terminal. After electrical conversion, to generate DC power supply to the Receiver device. Generally speaking, both sides of the coil can send and receive electromagnetic waves. Therefore, the non-inductive side of the coil is often equipped with magnetic materials to concentrate the electromagnetic energy on the induction side. The proximity of the magnetic material to the coil will increas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/11
CPCG01V3/101
Inventor 蔡明球詹其哲
Owner FU TONG TECH
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