Bistable electromagnetic device and application thereof

Abstract

The invention provides a bistable electromagnetic device, which is characterized by comprising a support, a coil, a push-and-pull rod and a permanent magnet, wherein the coil is wound on the support and has a hollow inside; the permanent magnet is fixedly arranged in the push-and-pull rod which can get in and out in a straight line in the hollow position under the interaction of magnetic forces; when the coil is subjected to excitation, the push-and-pull rod can be moved upwards to be absorbed on the top under the action of a soft magnet as the push-and-pull rod reaches the top, at present, the coil can realize self-holding without currents inside; and when the coil is subjected to reverse excitation, the push-and-pull rod can overcome the suction of the soft magnet to move downwards, and then is pulled down from the soft magnet until the soft magnet is blocked, at present, the push-and-pull rod can be absorbed with the soft magnet mutually. In the bistable electromagnetic device provided by the invention, the soft magnet as a closed magnetic path on a traditional electromagnetic device is changed, and forces in different directions can be generated between the soft magnet and the permanent magnet when the currents in different directions are charged in the coil, thus realizing bidirectional action.

Description

technical field [0001] The invention relates to automatic control technology, in particular to a bistable electromagnetic device using permanent magnets and its application in manufacturing electromagnetic valves. Background technique [0002] Most of the traditional electromagnetic devices use soft magnets as magnetic materials, so that the electromagnetic device can have no residual magnetism when it is not excited, and the valve plate can be reset smoothly; the electromagnetic device forms a closed loop when it is attracted, which reduces the magnetic resistance and can be greatly improved. Reduce the field current for self-holding, but still need current to maintain it. Because the size of the air gap has a great influence on the electromagnetic force, the travel of traditional electromagnetic devices is relatively small. [0003] Since the force of the electromagnetic device is proportional to the number of ampere turns, unlike the motor, the force can be increased thr...

AI Technical Summary

Problems solved by technology

Because the size of the air gap has a great influence on the electromagnetic force, the travel of traditional electromagnetic devices is relatively small

[0003] Since the force of the electromagnetic device is proportional to the number of ampere turns, unlike the motor, the force can be increased through the reducer, so the current is usually larger and the number of coil turns is also more, which means that the copper material is consumed and the volume is larger. Big

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