relay

The relay design addresses the challenge of high-voltage DC relays by using a movable magnetic conductive body to adjust distance and force for optimal short-circuit resistance and breaking capability, ensuring reliable operation and compactness.

JP2025533254APending Publication Date: 2025-10-03XIAMEN HONGFA ELECTRIC POWER CONTROLS CO LTD
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Patent Information

Application Number
JP2025521142
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-10-12
Filing Date
2023-10-09
Publication Date
2025-10-03

AI Technical Summary

Technical Problem

High-voltage DC relays face issues with contacts being flipped off due to electromotive repulsive force from short-circuit current, and existing solutions compromise either short-circuit resistance or interrupting capability, conflicting with the goals of compactness and lightness.

Method used

A relay design with a movable magnetic conductive body that adjusts its distance and magnetic attraction force based on current magnitude, combining short-circuit withstand capability with breaking capability, using a movable magnetic conductive body connected to a holding member and elastic members to manage the movement between positions.

Benefits of technology

Enhances short-circuit withstand current capacity and ensures reliable operation by adjusting magnetic forces to handle varying current levels, achieving both short-circuit resistance and timely disconnection without compromising compactness.

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Abstract

The relay comprises a contact container (10), a pair of fixed contact lead-out ends (20), a holding member (42), a first magnetic conductive body (40), and a movable member (53). The contact container has a contact chamber (101), and the pair of fixed contact lead-out ends are connected to the contact container. At least a portion of the holding member is disposed within the contact chamber and fixedly provided relative to the contact container, the first magnetic conductive body is connected to the holding member so as to be movable between a first position (P1) and a second position (P2), the movable member includes a movable contact piece (54) and a second magnetic conductive body (55), the first magnetic conductive body is disposed on the side of the movable contact piece facing the fixed contact pull-out end, and the second magnetic conductive body is fixedly connected to the side of the movable contact piece facing away from the fixed contact pull-out end, and at the first position, the distance between the first magnetic conductive body and the second magnetic conductive body is a first interval, and at the second position, the distance between the first magnetic conductive body and the second magnetic conductive body is a second interval, and the first interval is greater than the second interval.
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