Power supply device and driving method thereof
US-9203478-B2 · Dec 1, 2015 · US
Wireless power transmitter
US9190850B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9190850-B2 |
| Application number | US-201213342381-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 3, 2012 |
| Priority date | Sep 18, 2009 |
| Publication date | Nov 17, 2015 |
| Grant date | Nov 17, 2015 |
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Abstract
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An example wireless power transmitter is configured for wirelessly transmitting a signal to a power receiving apparatus including a first resonance circuit and a load circuit. The first resonance circuit includes a power receiving coil and a first capacitor. The example wireless power transmitter includes a power supply that has a variable oscillation frequency and generates a signal having the oscillation frequency; a second resonance circuit that transmits the signal to the power receiving apparatus; a measuring unit that measures a signal reflection coefficient, the signal reflection coefficient being determined based on magnitude of the signal and magnitude of a signal reflected on the second resonance circuit to the power supply; and a controller that detects a value of the oscillation frequency making the signal reflection coefficient smaller than or equal to a threshold value, and calculates an electromagnetic coupling coefficient between the power transmission coil and the power receiving coil based on the detected value.
First claim
Opening claim text (preview).
The invention claimed is: 1. A wireless power transmitter for wirelessly transmitting a signal to a power receiving apparatus having a first resonance circuit and a load circuit, wherein the first resonance circuit includes a power receiving coil and a first capacitor, the wireless power transmitter comprising: a power supply that has a variable oscillation frequency and generates signals; a second resonance circuit that transmits the signals to the power receiving apparatus;…
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Frequently asked questions
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- What does patent US9190850B2 cover?
- An example wireless power transmitter is configured for wirelessly transmitting a signal to a power receiving apparatus including a first resonance circuit and a load circuit. The first resonance circuit includes a power receiving coil and a first capacitor. The example wireless power transmitter includes a power supply that has a variable oscillation frequency and generates a signal having the…
- Who is the assignee on this patent?
- Onizuka Kohei, Ueno Takeshi, Toshiba Kk
- What technology area does this patent fall under?
- Primary CPC classification H02J5/005. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 17 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).