Novel electric reactor

Abstract

The invention discloses a novel electric reactor which comprises an iron core, a coil, angle brace bars, bearing bases, stay bolts and cushion blocks. The iron core, the coil, the angle brace bars, the bearing bases, the stay bolts and the cushion blocks form a whole structure through vacuum pressure paint immersing. The coil winds around the iron core. The iron core is a zero-clearance yoke-free iron core. The two ends of the iron core extend out of the end of the coil and are provided with center penetrating holes respectively, wherein the center penetrating holes penetrate through the stacking thickness of the whole iron core. The number of the angle brace bars is at least four. The angle brace bars are arranged between the iron core and the coil and uniformly arranged in the peripheral direction of the iron core. The number of the bearing bases is two. The two bearing bases are located at the two ends of the iron core respectively. The cushion blocks are made of insulating materials and located between the iron core and the bearing bases. The stay bolts penetrate through the center penetrating holes and the cushion blocks and are fixedly connected with the bearing bases. The novel electric reactor has the advantages of being small in weight, small in size, low in noise, small in leakage flux, good in vibration resistance and the like.

Description

technical field [0001] The invention relates to a reactor, in particular to a novel reactor applied to an inverter power supply in the rail transit field. Background technique [0002] A reactor is a device used to provide inductance and is widely used in circuit systems. According to the different magnetic circuit structures, reactors can generally be roughly divided into three categories: [0003] Air-core reactor, that is, a reactor that does not contain ferromagnetic materials that control the magnetic flux inside the winding; [0004] Iron core reactor, that is, a reactor with an iron core installed inside the winding. At present, as far as the reactor used in the inverter power supply is used in the field of rail transit, most of the iron cores contain several air gaps; [0005] Magnetically shielded air-core reactor, that is, a reactor that does not contain any ferromagnetic material inside the winding, but is equipped with a ferromagnetic material that controls the...

AI Technical Summary

Problems solved by technology

[0011] However, there are many types of iron core sheets in this solution. After the iron sheets are glued, special pressure equipment is needed to compress them, and finally they are dried or dried. The core stacking process is very complicated and cumbersome, and special tooling needs to be designed to ensure the integrity of the iron cores. The neatness of stacking

Secondly, semi-finished iron cores need to be transported multiple times between each process, there is a risk of deformation and displacement of the iron core, and the production efficiency is also low

In addition, due to the fact that the iron core column is composed of iron core sheets, air gap plates and epoxy resins, the physical properties vary greatly (silicon steel sheet is 1.2x10 5 / ℃, the air gap plate is 2x10 5 / ℃, epoxy resin is 7.6x10 5 / °C is 6 times that of the former), due to the large difference in the degree of thermal expansion and contraction of various materials, if the DC smoothing reactor is used in the rail transit environment, it is difficult to ensure that the random vehicle can span multiple climates for a long distance The size of the air gap on the rear core post will not change after thermal expansion and contraction

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