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Contactless method of supplying power

A power supply method and non-contact technology, which is applied in the direction of current collectors, electric vehicles, electrical components, etc., can solve the problems of unstable communication between portable devices and power supply sockets, failure to realize power supply, and reduced power received by portable devices.

Active Publication Date: 2013-10-30
PANASONIC ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the power supply efficiency decreases, the power received by the portable device will decrease, and the communication between the portable device and the power supply stand will also become unstable, making normal power supply impossible.

Method used

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  • Contactless method of supplying power
  • Contactless method of supplying power

Examples

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Embodiment Construction

[0071] Hereinafter, it demonstrates based on the Example of this invention. However, the embodiments shown below illustrate the non-contact power supply method for embodying the technical idea of ​​the present invention, and the present invention does not specify the non-contact power supply method as the following method or circuit configuration. In addition, in order to facilitate the understanding of the claims, this specification writes the serial numbers corresponding to the parts shown in the embodiment after the parts shown in the "claims" and "summary of the invention". However, the components in the claims are by no means specified as components of the embodiment.

[0072] figure 1 It is a block diagram showing a power supply stand and a portable device that perform power transmission by the contactless power supply method of the present invention. This figure shows a state where power is supplied from the power supply stand 10 to the portable device 50 after the po...

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Abstract

The contactless method of supplying power magnetically couples a portable device (50) receiving coil (51) with a power supply stand (10) transmitting coil (11) and transmits power by magnetic induction. The portable device sends power adjustment signals to the power supply stand, and the stand adjusts transmitting coil output based on the power adjustment signals. The portable device compares the power received from the stand to the required power, sends an increase-power-request signal if the received power is below the required power, and sends a decrease-power-request signal if the received power is above the required power. Power adjustment signals include increase-power-request weighting values that increase with the size of the request to increase power and / or rate-of-change weighting values that increase with the amount of change in the requested power. Weighting values output with a given period are added and a foreign object is judged to be present when the sum attains a set value. Thus, it is one object of the present invention to provide a contactless method of supplying power that can stably and reliably detect foreign objects with a simple circuit structure and low manufacturing cost.

Description

technical field [0001] The present invention relates to a non-contact power supply method in which a power supply coil and a power receiving coil are arranged close to each other in an electromagnetically coupled manner, and the power is supplied from the power supply coil to the power receiving coil through electromagnetic induction, and particularly relates to detection of no contact when a foreign object is placed on a power supply stand. Contact power supply method. Background technique [0002] We are developing a contactless power supply method that transmits power from the power supply coil to the power reception coil after placing a portable device with a built-in power reception coil on a power supply stand with a built-in power supply coil. (refer to patent document 1) [0003] In this contactless power supply method, the power supply stand is used as a charging stand, the portable device is regarded as a battery-built-in device, and power is transmitted from the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J17/00H02J7/00
CPCY02E60/12H02J7/025H02J7/0029H02J50/10H02J50/90H02J7/00034H02J50/80H02J50/60H02J7/00
Inventor 山本洋由渡边良二玉井干隆
Owner PANASONIC ENERGY CO LTD
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