Power transmission equipment and contactless power supply system

The described power transmission device improves impedance matching responsiveness by using object detection sensors and a control device to adjust the matching circuit configuration based on the number of power receiving devices, ensuring efficient and stable power transmission.

JP7864264B2Active Publication Date: 2026-05-22MITSUBISHI ELECTRIC CORP
View PDF 6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
MITSUBISHI ELECTRIC CORP
Filing Date
2023-06-28
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

Existing wireless power supply systems face poor responsiveness in impedance matching due to the inability to accurately determine the number of power receiving devices, necessitating multiple circuit switches to achieve appropriate matching.

Method used

A power transmission device with object detection sensors at the ends of a power transmission coupler, a control device, and a switchable matching circuit that determines the number of power receiving devices and adjusts the circuit configuration accordingly, enabling impedance matching with a single switch.

Benefits of technology

This approach enhances the responsiveness of impedance matching by accurately determining the number of power receiving devices and adjusting the circuit configuration in a single step, ensuring efficient and stable power transmission.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 0007864264000001
    Figure 0007864264000001
  • Figure 0007864264000002
    Figure 0007864264000002
  • Figure 0007864264000003
    Figure 0007864264000003
Patent Text Reader

Abstract

A power transmission apparatus (10) comprising an extending power transmission coupler (14, 140), a high-frequency power supply (12) that supplies high-frequency power to the power transmission coupler (14, 140) via a matching circuit (13), object detection sensors (3a, 3b) that are respectively installed at one end and the other end of the power transmission coupler (14, 140) and that detect power reception devices passing through the respective installed positions, and a control device (15) that controls the matching circuit (13), wherein the matching circuit (13) is configured with a circuit that can be switched to a plurality of circuit configurations, and the control device (15) receives signals from the respective object detection sensors (3a, 3b), analyzes the received signals, determines the number of power reception devices (20) positioned on the power transmission coupler (14, 140), and then performs control so as to switch the circuit configuration of the matching circuit (13) on the basis of the determined number of power reception devices (20).
Need to check novelty before this filing date? Find Prior Art