Anti-rebound strong-breaking high-voltage direct-current relay

By employing a three-stage reaction force design and the progressive stiffness characteristics of the tower-shaped spring, combined with the optimization of the magnet and spring, the problems of contact current carrying capacity and arcing in high-voltage DC relays under high-performance requirements have been solved, achieving higher breaking capacity and contact stability, and reducing failure rate and welding risk.

CN121617862APending Publication Date: 2026-03-06ZHONGHUI RUIDE ELECTRONICS (WUHU) CO LTD
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Patent Information

Application Number
CN202511805247.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-03
Publication Date
2026-03-06

AI Technical Summary

Technical Problem

When adapting to high-performance requirements, existing high-voltage DC relays suffer from increased Joule heating due to increased contact current, which severely damages the contacts and insulation materials due to electric arcs. The mechanical system's breaking capacity is insufficient, and it cannot meet the requirements for contact anti-welding.

Method used

It adopts a three-stage reaction force design and the progressive stiffness characteristics of the tower spring, combined with the optimized design of the magnet and spring, to provide multi-layer reaction force and breaking force, enhance the contact breaking capacity, and suppress rebound and arc generation.

Benefits of technology

It effectively reduces bounce and arc frequency, reduces contact material erosion, increases breaking speed, enhances contact stability and reliability, reduces welding risk, and improves system safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses an anti-rebound strong-breaking high-voltage direct-current relay, and the relay comprises a static assembly which is disposed in a relay housing, is used for forming a static conductive and magnetic circuit foundation of the relay, provides a second section of counterforce in the pull-in process of the relay, inhibits the pull-in rebound of a contact, and assists in enhancing the breaking force during breaking. And the movable assembly is arranged in the relay shell and is used for realizing dynamic on-off actions of the contacts. According to the invention, the three-section counter-force design is optimized and combined with the tower-shaped spring, so that the collision energy and bounce of the movable contact can be reduced, the arc generation and the component loss are reduced, and the bonding risk is reduced; breaking force is provided through the synergistic effect of the main spring, the counter-force spring and the magnetic steel, the contact can be assisted to be rapidly separated, and therefore fusion welding is overcome, arc extinguishing is accelerated, and contact damage is reduced. Through the magnetic steel directional polarity and closed magnetic circuit design, the magnetic field intensity can be enhanced, the pull-in response time can be shortened, and the magnetic leakage can be reduced, so that the pull-in force and the holding force can be enhanced, and the contact looseness can be avoided.
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