Foreign object detection based on transmitter input parameter
US-2024429754-A1 · Dec 26, 2024 · US
Contactless power supplying system and metal foreign object detection device of contactless power supplying system
US9099239B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9099239-B2 |
| Application number | US-201113806799-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 20, 2011 |
| Priority date | Jun 30, 2010 |
| Publication date | Aug 4, 2015 |
| Grant date | Aug 4, 2015 |
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Abstract
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A contactless power supplying system, which excites a primary coil of a power supplying device to generate an induced electromotive force at a secondary coil of an appliance arranged on the device and supply the induced electromotive force to a load of the appliance, includes a metal foreign object detection device. The metal foreign object detection device includes an antenna coil, an oscillation circuit, and a detection circuit. The oscillation circuit includes a component having a design value that generates oscillation in a range of oscillation conditions from immediately after the oscillation circuit starts to generate oscillation to just before a stable and continuous oscillation condition. The detection circuit detects a suspension of the oscillation or an attenuation in amplitude of the oscillation based on a change in an electric characteristic of the antenna coil caused by a metal foreign object on the power supplying device.
First claim
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The invention claimed is: 1. A contactless power supplying system comprising: a power supplying device including a primary coil and a high-frequency inverter that applies high-frequency current to the primary coil; an appliance including a secondary coil that generates an induced electromotive force using an alternate magnetic field generated by the current flowing to the primary coil, wherein the appliance uses the electromotive force generated at the secondary coil to supply p…
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Frequently asked questions
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- What does patent US9099239B2 cover?
- A contactless power supplying system, which excites a primary coil of a power supplying device to generate an induced electromotive force at a secondary coil of an appliance arranged on the device and supply the induced electromotive force to a load of the appliance, includes a metal foreign object detection device. The metal foreign object detection device includes an antenna coil, an oscillat…
- Who is the assignee on this patent?
- Abe Hideaki, Panasonic Ip Man Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02J50/60. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 04 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).