Magnetic flux uniform distribution type reactor iron core and method

Abstract

The invention relates to a magnetic flux uniform distribution type reactor iron core and a method, and belongs to the technical field of reactor manufacturing. According to the technical scheme, a plurality of main column iron core cakes (1) are arranged on a main column of an iron core frame (3), air gaps (2) between the main column iron core cakes (1) are formed between the main column iron core cakes (1), reactor coils (4) are arranged outside the main column iron core cakes (1), and the outer edge of each main column iron core cake (1) is of an iron core cake chamfering structure (5). According to the invention, the distribution of magnetic lines is improved by changing the local magnetic resistance, so that the concentration of the magnetic lines is greatly improved, the effect of approximately uniformly distributing magnetic flux in the iron core cakes is achieved, and finally the purposes of reducing the vibration of the reactor, reducing the loss and stabilizing the linearity of a volt-ampere curve are achieved.

Description

technical field [0001] The invention relates to a magnetic flux evenly distributed reactor iron core and a method, belonging to the technical field of reactor manufacturing. Background technique [0002] The traditional structure of large-capacity and high-voltage reactors is: the main column is a core cake structure, and there is an air gap between every two core cakes. The purpose of adjusting the reactance is achieved by adjusting the air gap height of the main column. The main yoke and side columns are Box structure, to achieve the purpose of the magnetic path. Due to the existence of the air gap, the magnetic field lines are concentrated on the side of the core cake close to the coil, which is especially serious for the edge corrugation of the core cake. This results in an uneven distribution of magnetic flux in the core cake, with a larger value on one side of the coil and a smaller value on the rest. This situation will lead to increased vibration of the reactor, in...

AI Technical Summary

Problems solved by technology

Due to the existence of the air gap, the magnetic field lines are concentrated on the side of the core cake near the coil, which is especially serious for the edge corrugation of the core cake.

This results in an uneven distribution of magnetic flux in the core cake, with a larger value on one side of the coil and a smaller value on the rest

This situation will lead to increased vibration of the reactor, increased loss, and higher local temperature rise

When the voltage is gradually increased, the nonlinearity of the volt-ampere curve will also increase due to the local oversaturation of the core cake.

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