A core reactor

Abstract

The invention provides an iron core reactor which comprises an iron core column, wherein the iron core column comprises a plurality of iron core cakes (3) arranged in sequence along an axis, and a gap (4) arranged between each two adjacent iron core cakes (3), and the iron core reactor further comprises a fixing mechanism which is used for respectively fixing the iron core cakes (3) in the iron core column so as to limit the vibration of the iron core cakes (3). Compared with the prior art, the vibration and the noise generated by the iron core reactor can be reduced.

Description

technical field [0001] The invention belongs to the technical field of reactors, in particular to an iron core reactor. Background technique [0002] Reactor is an inductive electrical appliance used for current limiting, current stabilization, reactive power compensation, shifting and filtering in power system. Reactors can be roughly divided into three categories according to the type of core: one is air-core reactor, which One kind of reactor has only windings but no iron core, which is essentially a hollow inductance coil; one is an iron core reactor, and its magnetic circuit is a closed iron core column, and the iron core column is covered with windings; the other is an air gap reactor. Iron core reactor, its magnetic circuit is an iron core column with air gap, and winding is sheathed outside the iron core column. Composed in series. [0003] Since the air-core reactor has no iron core, the magnetic flux generated by the unit current in the winding is small, so the i...

AI Technical Summary

Problems solved by technology

[0010] ②The pulling screw 5 passes through the core column composed of several core cakes 3 and the air gaps 4 provided between each adjacent two core cakes in series. Each core cake 3 will produce local vibration due to uneven force in each direction. And the center hole of each core cake 3 and the pulling screw rod 5 have an axial and infinite structure, so there is no damping in the axial direction, so that the local vibration between each core cake 3 and the pulling screw rod is caused to all the core cakes 3 in series. A series of vibrations are generated, which leads to the expansion of the overall vibration and noise of the reactor

[0011] ③The radial direction between the pulling screw 5 and the core cake 3 is not closely matched, so there is a gap in the radial direction. Under the action of magnetostriction, each core cake 3 produces vibration and displacement in the radial direction, which will also cause the reactor Amplification of overall vibration and noise

[0012] ④ In order to apply a sufficient pre-compression force to the series-connected core cake 3, the pull screw 5 suffers from excessive fatigue due to long-term high-intensity tensile stress, so that after a period of operation of the core reactor with an air gap, its vibration and increased noise

Images