Mobile hybrid transmit/receive node for near-field wireless power delivery
US-10181729-B1 · Jan 15, 2019 · US
Power transmission device
US10790705B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10790705-B2 |
| Application number | US-201716314139-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 19, 2017 |
| Priority date | Jun 30, 2016 |
| Publication date | Sep 29, 2020 |
| Grant date | Sep 29, 2020 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A power transmission device transmits power underwater to a power reception device including a power reception coil. The power transmission device includes: a power transmission coil that transmits power to the power reception coil through a magnetic field; a power transmitter that transmits an alternating current power having a predetermined frequency to the power transmission coil; and a first capacitor that is connected to the power transmission coil and forms a resonance circuit resonating with the power transmission coil. The predetermined frequency is a frequency between a first frequency at which a geometric mean value of a Q value of the power transmission coil and a Q value of the power reception coil are the maximum and a second frequency at which the Q value of the power transmission coil and the Q value of the power reception coil are the same.
First claim
Opening claim text (preview).
The invention claimed is: 1. A power transmission device that transmits power underwater to a power reception device including a power reception coil, the power transmission device comprising: a power transmission coil that transmits power to the power reception coil through a magnetic field; a power transmitter that transmits an alternating current power having a predetermined frequency to the power transmission coil; and a first capacitor that is connected to the power transmission coil and forms a resonance circuit resonating with the power transmission coil, wherein the predetermined frequency is a frequency between a first frequency at which a geometric mean value of a Q value of the power transmission coil and a Q value of the power reception coil are the maximum and a second frequency at which the Q value of the power transmission coil and the Q value of the power reception coil are the same. 2. The power transmission device according to claim 1 , wherein the predetermined frequency is the first frequency. 3. The power transmission device according to claim 1 , further comprising: at least one repeating coil that transmits power to the power reception coil using a magnetic field generated from the power transmission coil; at least one second capacitor that is connected to the repeating coil and forms a resonance circuit resonating at the frequency with the repeating coil; and a connector that connects the power transmission coil and the repeating coil to each other, wherein frequency characteristics of a Q value of the repeating coil are the same as frequency characteristics of the Q value of the power transmission coil. 4. The power transmission device according to claim 1 , wherein the power transmission coil transmits power in a direction substantially perpendicular to a water surface. 5. The power transmission device according to claim 1 , wherein the power transmission coil transmits not only the power but also data.
Assignees
Inventors
Classifications
with electronic devices having internal batteries, e.g. mobile phones · CPC title
involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title
Plug-in electric vehicles · CPC title
Inductive energy transfer · CPC title
Charging columns specially adapted for electric vehicles · CPC title
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- What does patent US10790705B2 cover?
- A power transmission device transmits power underwater to a power reception device including a power reception coil. The power transmission device includes: a power transmission coil that transmits power to the power reception coil through a magnetic field; a power transmitter that transmits an alternating current power having a predetermined frequency to the power transmission coil; and a firs…
- Who is the assignee on this patent?
- Panasonic Corp
- What technology area does this patent fall under?
- Primary CPC classification H02J50/12. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 29 2020 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).