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Power transmission control device, power transmission device, electronic instrument, and non-contact power transmission system

A control device and power transmission technology, which can be applied to circuit devices, electromagnetic wave systems, battery circuit devices, etc., and can solve problems such as difficulty in secondary side load changes.

Active Publication Date: 2008-08-27
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a technical problem that it is difficult to accurately detect the load variation on the secondary side

Method used

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  • Power transmission control device, power transmission device, electronic instrument, and non-contact power transmission system
  • Power transmission control device, power transmission device, electronic instrument, and non-contact power transmission system
  • Power transmission control device, power transmission device, electronic instrument, and non-contact power transmission system

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Embodiment Construction

[0055] Hereinafter, preferred embodiments of the present invention will be described in detail. Furthermore, the present embodiment described below is not intended to limit the content of the present invention described in the claims, and all the configurations described in the present embodiment are not essential to the technical means of the present invention.

[0056] 1. Electronic equipment

[0057] As shown in FIG. 1(A), an example of electronic equipment using the non-contact power transmission method of the present embodiment is described. A charger 500 (extender, Cradle), one of electronic devices, has a power transmission device 10 . Furthermore, a mobile phone 510 which is one of the electronic devices has a power receiving device 40 . In addition, the mobile phone 510 has a display unit 512 such as an LCD, an operation unit 514 composed of buttons, etc., a microphone 516 (voice input unit), a speaker 518 (voice output unit), and an antenna 520 .

[0058] The char...

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PUM

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Abstract

A power transmission control device provided in a power transmission device of a non-contact power transmission system includes a drive clock signal generation circuit that generates a drive clock signal that specifies a drive frequency of a primary coil, a driver control circuit that generates a driver control signal based on the drive clock signal and outputs the driver control signal to a transmission driver, a waveform adjusting circuit that outputs a waveform adjusting signal of an induced voltage signal of the primary coil, a pulse width detection circuit that receives the waveform adjusting signal and the drive clock signal and detects pulse width information relating to the waveform adjusting signal, and a control circuit that detects a change in secondary-side load based on the detected pulse width information.

Description

technical field [0001] The invention relates to a power transmission control device, a power transmission device, electronic equipment, a non-contact power transmission system and the like. Background technique [0002] In recent years, so-called non-contact power transmission (non-contact power transmission) that can transmit power without contact of metal parts by using electromagnetic induction has also been developed. As an application example of this non-contact power transmission, there are many proposals related to charging of mobile phones and home appliances (for example, handsets of phones). [0003] Patent Document 1 describes a prior art of contactless power transmission. In this patent document 1, data transmission from a power receiving device (secondary side) to a power transmitting device (primary side) is realized by a so-called load modulation method (load adjustment method). Then, the power transmitting device detects the induced voltage of the primary c...

Claims

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Application Information

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IPC IPC(8): H02J17/00H02J7/00
Inventor 神干基
Owner SEIKO EPSON CORP