Bistable electromagnetic system applied to contactor and contactor thereof

Abstract

The invention discloses a bistable electromagnetic system applied to a contactor and the contactor thereof. The bistable electromagnetic system comprises a yoke iron shell frame, a coil structure, a magnetic pole and a movable iron core assembly; the magnetic pole is fixed in a middle cavity of the coil structure, and the movable iron core assembly comprises an upper iron core, a permanent magnet and a lower iron core which are connected into a whole and arranged in the middle cavity; and the upper iron core is provided with a driving rod penetrating out of the upper end portion of the yoke iron shell frame, and the driving rod is connected with a moving contact assembly of the contactor. The electromagnetic system adopting the technical scheme has a bistable magnetic holding function and is good in vibration resistance, the coil structure can work by adopting a positive and negative pulse excitation mode, the power-on time is short, the response speed is high, and the power consumption of the coil structure can be greatly reduced. The electromagnetic system is simpler in structural design, convenient to form and manufacture, high in assembly efficiency, beneficial to reducing the size of the electromagnetic system, stable in product performance and capable of reducing the production cost, and thus the use performance and the market competitiveness of the contactor are improved.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to a bistable electromagnetic system applied to a contactor and the contactor thereof. Background technique [0002] The electromagnetic system of traditional AC and DC contactors is mainly composed of moving iron core, static iron core, reaction force spring, contact spring and coil. From the working principle of the contactor, it can be seen that the coil must be continuously energized after closing to keep the moving iron core in the closing state, that is, the maintenance of the moving iron core closing position is at the cost of energy consumption, which consumes electric energy. Large, when the contactor is closed, it will also produce a large working noise, and inevitably generate contact bounce, which reduces the electrical life of the contactor. [0003] With the rapid development of low-voltage electrical appliances, the market has higher and hig...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the complex design of the electromagnetic system structure of the double magnetic steel structure in the prior art, which requires two permanent magnets, many assembly parts, high material cost, cumbersome installation, and low assembly efficiency , the problem of high manufacturing cost, so as to provide a bistable electromagnetic system applied to contactors and its contactors with simple structure, convenient installation, cost reduction, and bistable magnetic holding function.

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