High voltage DC vacuum relay with high reliability and long service life

A vacuum relay, high-voltage DC technology, applied in relays, electrodeless relays, electromagnetic relays and other directions, can solve the problems of increased contact temperature rise, increased contact voltage drop, reduced relay performance and reliability of use, etc., to achieve reliable contact, Excellent electrical insulation performance, ensuring the effect of arc breaking ability
CN101677044AActive Publication Date: 2010-03-24XIAMEN HONGFA ELECTRIC POWER CONTROLS
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
XIAMEN HONGFA ELECTRIC POWER CONTROLS
Publication Date
2010-03-24

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Abstract

The invention discloses a high voltage DC vacuum relay with high reliability and long service life, which is arranged inside a vacuum cavity body that is sealed and connected by meal and ceramic; a ceramic insulator is connected between a movable contact component and a push rod in a sliding way; the good vacuum performance and electric insulation performance of the ceramic insulator can be utilized to lead the movable contact and a fixed contact to main good electric insulation together with a magnetic circuit system formed by a magnetic guide yoke iron plate of the relay, an iron core and the like no matter in a state of connection or disconnection, so that current interruption capability of the relay can be guaranteed when DC high-voltage load is switched; a vacuum chamber body and allparts in side the vacuum chamber body formed by the high voltage DC vacuum relay have low enough saturated vapor pressure and are treated by high temperature baking exhaust, so that the vacuum degreein the vacuum chamber body can ensure the work demand of the relay on switching heavy current and the DC high-voltage load for a long time; furthermore, the relay also has the advantages of simple andcompact structure, small volume, light weight, strong shock resistance and impact resistance, simple technique process, low production cost and large batch production.
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Description

technical field

[0001] The invention relates to a relay, in particular to a novel high-voltage DC vacuum relay with high reliability and long service life. Background technique

[0002] With the development of modern industrial technology, automation has been gradually carried out in various fields. In order to ensure the safety of electricity consumption and output power, the requirements for switching voltage and switching current of relays are getting higher and higher, such as: electric vehicles, hybrid vehicles, Fuel cell vehicles, construction machines, power management, charging-discharging devices, frequency conversion control, solar power generation system control, welding equipment, elevators, etc. However, traditional relays are limited by their own manufacturing technology, especially the small contact gap. When connecting high-voltage AC, high-voltage DC, large DC motors, and low power factor inductive loads, the relay contacts are very prone to bonding failure ...

Claims

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