A high-voltage DC vacuum relay with high reliability and long life

Abstract

The invention discloses a high-voltage direct-current vacuum relay with high reliability and long life. In a vacuum cavity sealed by metal and ceramics, a ceramic insulator is slidingly connected between a moving contact assembly and a push rod, and the ceramic insulator parts are well Excellent vacuum performance and electrical insulation performance, so that the moving contact and the static contact maintain good contact with the magnetic circuit system composed of the magnetic yoke iron plate, iron core and other parts of the relay no matter in any state of conduction or disconnection Electric insulation, thereby ensuring the arc breaking ability of the relay when switching DC high voltage loads; the vacuum chamber and all the parts inside the vacuum chamber of the present invention have a sufficiently low saturated vapor pressure, and are baked and exhausted at high temperature to make the vacuum The vacuum degree in the cavity can ensure the working needs of the relay switching large current and high DC voltage loads for a long time; the relay also has the following advantages: simple structure, compact, small size, light weight, strong anti-vibration and impact performance, process Simple, low production cost, capable of mass production.

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 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 or continuo...

AI Technical Summary

Problems solved by technology

At the same time, due to the gas filled in this type of relay, the contact pressure drop will increase, the temperature rise of the contact will increase, and the plastic parts will release organic gas under the action of temperature and arc, which will continue to deteriorate the electrical contact performance and reduce the performance and use of the relay. reliability

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