Integrated magnet yoke element for small circuit breaker

Abstract

The invention relates to an integrated yoke element of a small type circuit breaker, which is characterized in that the yoke and an iron core are designed as an integrated element. The iron core is embedded in the coil of the small type circuit breaker; the shape of the iron core is designed as a U shape or an L shape or a closed square-shaped contour; the iron core is provided with a magnetic pole plane, the middle of which is provided with an opening hole which is used for guiding an armature; and a convex shoulder which is used for supporting and fixing a static contact stent is arranged on the yoke. As the yoke and the iron core are designed as the integrated element which is formed by ferromagnetic metal material with good magnetic conductivity by punching, the structure of the yoke element is simplified and the type of the part is decreased, which not only saves the processing cost of raw materials, but also brings convenience for the warehouse management and reduces the equipment investment; simultaneously, the turning pieces with high price is reduced, the production cycle is shortened, and the magnetic circuit of a magnetic release is improved, thereby leading the performance of the whole circuit breaker to be more stable and reliable.

Description

technical field [0001] The invention relates to an integrated magnetic yoke element of a small circuit breaker, in particular to an integrated magnetic yoke element used for an electromagnetic tripper of a small circuit breaker. Background technique [0002] Miniature circuit breakers usually have overload and short circuit protection. The overload protection function is realized by the thermal element sensing heat and generating bending to push the circuit breaker mechanism to disconnect the current loop. The short circuit protection function is induced by the electromagnetic release composed of coils, armatures, magnetic cores, yokes and other components and establishes a magnetic field. It is realized by moving the armature and pushing the circuit breaker mechanism to break the current loop. In the prior art, the magnetic components of the existing miniature circuit breakers (L7 series circuit breakers) mainly include a yoke, a magnetic core, and an armature. The yoke an...

AI Technical Summary

Problems solved by technology

The yoke element of this structure is a closed square structure, and the raw material production cost is high

The magnetic yoke and the magnetic core in the magnetic circuit are composed of two independent components and are riveted together, including the turning core with high production cost. The raw material cost, processing cost and storage cost are high. The existence of riveting points also affects The performance of the magnetic circuit is affected, and the magnetic field in the circuit is easy to be inconsistent, thus affecting the consistency of the performance of the finished product

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