Vacuum contactor for wind power generation

Abstract

The invention discloses a vacuum contactor for wind power generation. The vacuum contactor comprises a rear substrate and a front substrate. An auxiliary switch, a static armature plate and a secondary power module are fixed on the inner side face of the rear substrate. A static iron core and a coil which are configured according to a proportion of 1:1 among vacuum switch tubes, the static iron core and the coil are mounted on the static armature plate. A moving armature plate is located between the static armature plate and the front substrate, a separating brake spring is located between the moving armature plate and the static armature plate, a plate playing screw is arranged in the inner side of the upper edge of the moving armature plate, and one end of the auxiliary switch is provided with a contact. A static coil out row and a moving coil out row are respectively fixed on the upper edge and the lower edge of the outer surface of the front substrate. The vacuum switch tubes are arranged between the static coil out row and the moving coil out row, and static conducting rods and moving conducting rods of the vacuum switch tubes are respectively connected with the static coil out row and the moving coil out row. A rotating shaft is arranged below the moving armature plate. A crank arm is arranged between the rotating shaft and the moving conducting rods in a connection mode. Two vacuum switch tubes are in parallel connection with each electrode between the static coil out row and the moving coil out row. The vacuum contactor is not only large in working currents and wide in application range, but also stable in switching in performance and good in quality, and especially suitable for being used on wind driven generators.

Description

technical field [0001] The invention relates to an electrical switch. Specifically, it is a high-current vacuum contactor used to transmit the electricity generated by the wind turbine to the grid. Background technique [0002] It is known in the field of electric appliance manufacturing that traditional vacuum contactors use a vacuum switching tube. Due to the use of a vacuum switching tube, its rated operating current is only less than 2000 amperes, so that this vacuum contactor can only be used on small and medium power electric equipment, and cannot be used on high-power power generation equipment, especially wind power generation above 3000 amperes It cannot be used on board at all, and the scope of application is limited. In traditional vacuum contactors, the number of static iron cores and coils is small. Usually, the vacuum switch tube, static iron core and coils are arranged according to the ratio of vacuum switch tube: static iron core and coil = 1.5:1. The suct...

AI Technical Summary

Problems solved by technology

Due to the use of a vacuum switching tube, its rated operating current is only less than 2000 amperes, so that this vacuum contactor can only be used on small and medium power electric equipment, and cannot be used on high-power power generation equipment, especially wind power generation above 3000 amperes It cannot be used on board at all, and the scope of application is limited

On the other hand, since one end of the crank arm is directly connected with the lower end of the movable conductive rod, the degree of tightness between the movable conductive rod and the crank arm cannot be adjusted, so that the static contact at the inner end of the static conductive rod of each vacuum switch tube is connected with the inner end of the movable conductive rod. It is difficult to realize synchronous closing or opening between moving contacts

Therefore, traditional vacuum contactors cannot meet the requirements of high current, high stability and reliability in wind power generation

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