Pulse excited double steady-state electromagnetic actuator

Abstract

A pulse excitation bistable electromagnetic actuator is used in fields such as relays, contactors, circuit breakers, solenoid valves, and electromagnets. Using pulse current excitation to actuate, magnets or retaining rings, spring pins, springs, etc. maintain a steady state, eliminating the need for prior art - positive and negative bi-directional pulse generation circuits and winding changeover switches in magnetic holding bistable; or in mechanical bistable Complicated bistable mechanism and return force spring can switch between two stable states only by inputting one-way pulse successively with one switch. It has the advantages of energy saving, anti-vibration, simple structure, easy miniaturization, not easy to shake, and long working stroke. features. It consists of a machine base, an electromagnet containing moving parts and a device for maintaining the steady state of the moving parts. It can be freed from the constraints of the steady-state maintaining device by the pulsed force of the electromagnet, swing from one side to the other side by relying on inertia to cross the point of maximum magnetic attraction, and be in a stable state again under the action of the steady-state maintaining device.

Description

technology field; [0001] The invention relates to a pulse excitation bistable electromagnetic actuator used in the field of electromagnetic actuators such as relays, contactors, circuit breakers, electromagnetic valves, and electromagnets. Background technique; [0002] At present, there are roughly three types of bistable electromagnetic actuators used in the above fields: I, electromagnet plus armature type <continuous power supply excitation actuation and holding>; II, electromagnet plus permanent magnet or torque core plus armature type (positive and negative bidirectional pulse current excitation actuation, permanent magnet or residual magnetism hold), such as Chinese patent application 98100891.7 (CN1192035A, 98-9-2); III, electromagnet plus mechanical bistable mechanism plus armature type <single Actuated by pulse current excitation, mechanical bistability >, see Chinese patent application 89206214.2 (CN2052949u, 90-2-14), 91107223.3 (CN1067768A, 93-1-6). ...

AI Technical Summary

Problems solved by technology

However, its iron core material requirements are high, its structure and control system are complex, and positive and negative power supplies are required, so it is expensive and inconvenient to use, which limits its popular use.

Type III uses instantaneous unidirectional current pulses, which overcomes the disadvantages of complex control of Type II, but adds a mechanical bistable mechanism and return force spring, which also makes the structure complex and has poor anti-vibration and impact capabilities, reducing work reliability.

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