High-voltage direct-current contactor

A high-voltage DC, contactor technology, applied in relays, electrodeless relays, electromagnetic relays, etc., can solve the problems of low protection level, no self-cleaning ability of contacts, complex structure, etc. The effect of gate triggering time and simple contact structure
CN102436976AActive Publication Date: 2012-05-02武汉长海电气科技开发有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
武汉长海电气科技开发有限公司
Publication Date
2012-05-02

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Abstract

The invention relates to a high-voltage direct-current contactor which is suitable for medium load systems in electrical power, metallurgy, mines, petroleum, traffic transportation and the like, and is especially suitable for a capacitor charging loop on an electric locomotive converter. The high-voltage direct-current contactor comprises an engine part, an electromagnetic drive part, a transmission part, a magnetic blow-out part, an auxiliary contact and an arc extinguish chamber, wherein the engine part is provided with a base, a main frame and a main frame cover plate; the transmission part is provide with a push rod, a reset spring, a rotary rack, a moving main contact and a moving arc contact; the electromagnetic drive part is provided with a cylindrical yoke, a movable iron core and a coil, and a lining is arranged between the cylindrical yoke and the movable iron core; and the magnetic blow-out part is provided with an iron core, a magnetic conducting iron plate, a magnetic blow-out coil, a static arc contact, an upper connecting copper bar and a static main contact. The high-voltage direct-current contactor has the advantages of long electric service life, high breaking speed, strong shock resistance capacity, compact structure, small volume, good tightness and the like, and is convenient in assembly and maintenance.
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Description

technical field

[0001] The invention relates to a high-voltage DC contactor, especially a high-voltage and small-capacity DC electromagnetic contactor, which is suitable for medium-load systems such as electric power, metallurgy, mining, petroleum, and transportation, and is especially suitable for capacitors on converters of electric locomotives. in the charging circuit. Background technique

[0002] At present, the DC contactors used on new electric locomotives in my country mainly use electromagnetic force as the power source. Traditional electromagnetic contactor contacts generally do not have arcing contacts, and it is difficult to achieve both breaking capacity and electrical life of the contacts; since there is no commutation and arcing channel, the contacts are severely burned during the breaking process; arc extinguishing Most of the chambers adopt metal grid structure, which leads to high breaking overvoltage and poor heat dissipation, which is not suitable for fr...

Claims

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