Magnetic latching operating mechanism capable of being directly opened by microcomputer protection device

Abstract

The invention discloses a magnetic latching operating mechanism capable of being directly driven to be opened by a microcomputer protection device. The magnetic latching operating mechanism is composed of a driving shaft, a guide sleeve, a lower magnetic insulation plate, a cylindrical inner magnet yoke, a permanent magnet, a magnet exciting coil, a cylindrical outer magnet yoke, a gasket, a cylindrical movable iron core armature and an upper magnetic insulation plate. According to the invention, by improving the working voltage of the magnet exciting coil, reducing the size of the magnet exciting coil, improving the magnet yoke structure, reducing the magnetic conduction magnetic resistance and winding the magnet exciting coil according to specific working parameters, the microcomputer protection device can protect output driving parameters, direct driving opening of the microcomputer protection device is achieved, and the protection tripping time of a middle-high voltage circuit breaker is shortened; and the line resistance of the magnet exciting coil can be improved, the closing driving current and the saturated conduction current are reduced, and the heating damage risk of themagnet exciting coil is reduced.

Description

Technical field [0001] The invention relates to high- and low-voltage vacuum electrical switch parts, especially operating mechanisms, and belongs to the technical field of electrical appliances. Background technique [0002] In current power transmission and distribution systems, circuit breakers with spring mechanisms are commonly used. The microcomputer protection device outputs a control signal to drive the shunt release on the spring mechanism. The shunt release releases the power of the energy storage spring and drives the circuit breaker to open. From the output of the microcomputer protection device to the opening of the circuit breaker, it takes a relatively long time for the spring mechanism circuit breaker to switch, which cannot adapt to the higher distribution network hierarchical protection arrangement. In recent years, the permanent magnet holding operating mechanism has attracted widespread attention in the industry due to its advantages of high reliability, long...

AI Technical Summary

Problems solved by technology

From the output of the microcomputer protection device to the opening of the circuit breaker, the switch of the spring mechanism circuit breaker takes a relatively long time, which cannot adapt to the higher level of protection arrangement of the distribution network

In recent years, the permanent magnet holding operating mechanism has attracted widespread attention in the industry due to its advantages of high reliability, long life, and easy control. Popularization and application, although the components of the permanent magnet holding operating mechanism are few, they can form a variety of magnetic circuit structures. During the state transition process of the vacuum switch, there are great differences in the static mechanical properties, dynamic mechanical properties and kinematic properties of the time-related mechanical, electrical and magnetic mutual coupling, which directly affect the control system, the operating mechanism and the vacuum switch. matching feature

This phenomenon that the control system and excitation coil are easily damaged also seriously affects the application prospect of the permanent magnet holding operating mechanism.

Images