Parallel type energy-saving type duplex winding high-voltage direct current contactor

Abstract

The present invention discloses a parallel type energy-saving type duplex winding high-voltage direct current contactor. A transmission core rod is provided with an auxiliary push rod, an arc extinguishing chamber is provided with upper and lower auxiliary contacts, and the upper and lower auxiliary contacts form normally closed auxiliary contacts; the upper auxiliary contact is fixedly connected with the auxiliary push rod, and the auxiliary push rod can drive the upward movement of the lower auxiliary contact to separate from the upper auxiliary contact when performing upward movement with the transmission core rod; a coil winding includes a starting winding and a maintaining winding, four terminals are led out from the coil winding, the two ends of the coil of the starting winding is respectively electrically connected with a second terminal and a fourth terminal, the two ends of the coil of the maintaining winding is respectively electrically connected with the second terminal and the third terminal, the first terminal is communicated with the third terminal, the third terminal and the fourth terminal are respectively electrically with the upper and lower auxiliary contacts, the first terminal and the third terminal are communicated, the first terminal and the second terminal are used and the third terminal and the second terminal are used for form two external supply terminals. The two windings and the auxiliary contact conversion mechanism of the contactor coil are simple in structure, high in production efficiency and low in cost.

Description

technical field [0001] The invention relates to a DC contactor, in particular to a parallel energy-saving double-winding high-voltage DC contactor. Background technique [0002] The coil of the DC contactor needs a large current during the start-up process to obtain a large electromagnetic attraction force to overcome the spring reaction force; when the operation is stable, the coil only needs a small maintenance current to meet the retention force requirements of the electromagnetic system. According to the characteristic that the starting current of the DC contactor is large and the current is small, the coil control part of the DC contactor is usually energy-saving. [0003] At present, there are two methods of coil energy-saving control of high-voltage DC contactors on the market: one is PWM (pulse width modulation) circuit board control; the other is that the coil has two windings (starting winding and holding winding), through the circuit board. Start winding and hold...

AI Technical Summary

Problems solved by technology

Since the circuit board needs to meet EMC and other requirements, there is a risk of failure during actual use

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