A coaxial reactor

Abstract

The invention relates to a coaxial reactor. The composition of the invention includes: an inner magnetic core support (1), an inner magnetic core (2), a cylindrical coil winding (3), a supporting frame (4), and a cylindrical outer magnetic The core (5), the outer magnetic core base cylinder (6), and the above structures together form a coaxial assembly. The present invention optimizes the magnetic circuit of the reactor by designing the structural parameters of the inner and outer magnetic cores and coil windings, with less magnetic flux leakage , the inductance value is stable. The invention belongs to power electronic system.

Description

technical field [0001] The invention relates to a reactor, especially a coaxial reactor. Background technique [0002] Reactor is an important component in power electronic system, which affects the efficiency, loss, noise and electromagnetic compatibility of the system. Although the air-core reactor has good linearity, it has disadvantages such as large volume, large loss, and large magnetic flux leakage range. Reactors with magnetic cores can reduce magnetic flux leakage and increase inductance values, so they are widely used. Reactors with C-shaped iron cores have the advantages of high inductance values, but their air gaps are small, and there is a problem of local magnetic density increase. The problem is that the inductance value changes with the length of the air gap, the magnetic permeability of the iron core, and the winding current, and the stability of the inductance value is poor during operation. [0003] The design and processing of the reactor can be simplif...

AI Technical Summary

Problems solved by technology

Although the air-core reactor has good linearity, it has disadvantages such as large volume, large loss, and large magnetic flux leakage range.

Reactors with magnetic cores can reduce magnetic flux leakage and increase inductance values, so they are widely used. Reactors with C-shaped iron cores have the advantages of high inductance values, but their air gaps are small, and there is a problem of local magnetic density increase. The problem is that the inductance value changes with the length of the air gap, the magnetic permeability of the iron core, and the magnitude of the winding current, and the stability of the inductance value is poor during operation.

[0003] The design and processing of the reactor can be simplified by using an open-circuit magnetic core. The document "Application Publication No. CN103794333A Chinese Invention Patent Application" discloses a magnetic strip type dry reactor. The reactor prepared by this method has the advantages of convenient manufacture and good heat dissipation And the magnetic core is not easy to saturate, etc., but this document does not optimize the reactor structure and magnetic circuit, the length of the coil winding is equivalent to the length of the magnetic core, and the magnetic flux leakage of the reactor is large, which increases the loss of the reactor and reduces the inductance value; In addition, the outer magnetic core is installed on the outer surface of the outer magnetic core base cylinder, so that the outer magnetic core base cylinder can only use insulating materials, which brings limitations to the installation and fixation of the reactor outer magnetic core

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