High voltage relay resistant to instantaneous high-current impact

Patent metadata

Field	Value
Publication number	US-11289280-B2
Application number	US-202016858314-A
Country	US
Kind code	B2
Filing date	Apr 24, 2020
Priority date	Oct 25, 2017
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

A high voltage relay resistant to instantaneous high-current impact is disclosed. The high voltage relay includes an electromagnet system, a control system, a contact system, and a base support. In various embodiments, an electromagnetic force generated by the contact system is used to resolve a problem of contact separation caused by an electric repulsion force generated by an instantaneous high-current.

First claim

What is claimed is:

1. A high voltage relay resistant to instantaneous high-current impact, comprising:
a base support;
a contact system that includes a current inflow plate, a movable copper plate, a connecting piece, a current outflow plate, a movable contact, and a static contact, wherein the current inflow plate and the current outflow plate are fastened on the base support, the movable contact is fastened on the movable copper plate, the static contact is fastened on the current outflow plate, and the connecting piece is riveted or welded onto the current inflow plate and the movable copper plate;
a control system connected to the contact system and configured to control the contacts to open and close; and
an electromagnet system connected to the control system and configured to generate a magnetic field to provide a driving force for the control system;
wherein the contact system generates an electromagnetic force, in response to an instantaneous high current, to offset an electric repulsion force between the contacts.

2. The high voltage relay according to claim 1 , wherein an overtravel is set between the movable contact and the static contact.

3. The high voltage relay according to claim 1 , wherein:
the electromagnet system comprises a magnetic yoke, a coil framework, a movable iron core, and a static iron core; the coil framework is fastened on outer sides of the movable iron core and the static iron core; and the magnetic yoke is wrapped around the upper, lower, left, and right sides of the movable iron core, the static iron core, and the coil framework to form a magnetic circuit.

4. The high voltage relay according to claim 3 , wherein the movable iron core and the static iron core are annular and hollow, are made of a magnetic material, and have a fixed air gap.

5. The high voltage relay according to claim 3 , wherein the movable iron core drives a transmission shaft to move after the high voltage relay is energized, so that a movable contact support and the movable copper plate move toward a direction of closing the contacts.

6. The high voltage relay according to claim 1 , wherein: the control system comprises a transmission shaft, a contact spring, a retractile spring, a movable contact support, and a circular hole; the contact spring and the retractile spring are wound around the transmission shaft, and the transmission shaft passes through the movable contact support, and is connected to the movable contact support by using a jump ring; and the circular hole is provided in the middle of the movable contact support.

7. The high voltage relay according to claim 6 , wherein the contact spring is configured to provide contact pressure between the movable contact and the static contact.

8. The high voltage relay according to claim 6 , wherein the retractile spring is configured to drive the movable contact support, by using the transmission shaft, to separate the movable contact from the static contact.

9. The high voltage relay according to claim 4 , wherein the movable iron core drives a transmission shaft to move after the high voltage relay is energized, so that a movable contact support and the movable copper plate move toward a direction of closing the contacts.

Assignees

• Univ Xi An Jiaotong
• Huawei Tech Co Ltd

Inventors

• Niu Chunping
• Wu Yi
• Kang Xufeng
• Yang Fei
• Rong Mingzhe
• Yan Guangchao
• Fang Qingyin

Classifications

• H01H50/54

  Contact arrangements · CPC title

• H01H50/36

  Stationary parts of magnetic circuit, e.g. yoke · CPC title

• H01H50/646 Primary

  intermediate part being a blade spring · CPC title

• H01H50/443

  Connections to coils · CPC title

• H01H1/54 Primary

  by magnetic force {(combined with electrodynamic opening H01H77/101)} · CPC title