Three-column type air-gap-free iron core of magnetic-valve type controllable electric reactor

Abstract

The invention discloses a three-column type air-gap-free iron core of a magnetic-valve type controllable electric reactor. A cooling device and three-column type air-gap-free structure is adopted by the iron core. Each primary alternating-current working winding is formed by parallel binding of three coils. The primary alternating-current working windings are respectively arranged on two side columns and a middle column. Two side-column windings are connected with a filter in parallel and then are connected with the middle-column winding in series. Magnetic valves, sleeves and cooling devices are provided; two direct-current exciting windings and the cooling devices are arranged on the two side columns respectively, and are in reverse series connection to offset line-frequency induction voltages of the both. The two side-column alternating-current windings are in parallel connection to provide another passage for induced currents in the exciting windings, so that induced currents in the windings and the filter are controlled to be voltage sources, and influences of the working windings on the exciting windings are minimized. The three-column type air-gap-free iron core has the advantages of low operation noise, high reliability and low cost.

Description

technical field [0001] The invention relates to a device in the field of electromagnetic technology, in particular to a three-column air-gap-free iron core of a magnetic valve type controllable reactor. Background technique [0002] Controllable shunt reactors are mainly divided into two types: high-impedance controllable reactors and magnetic valve controllable reactors. Their basic principles are: to use the nonlinear relationship of the magnetization curve of ferromagnetic materials to smoothly adjust the inductance and capacity of the reactor by changing the saturation of ferromagnetic materials. Only their specific implementation structures are different. The magnetic valve controllable reactor is realized by introducing a "flux valve" into the iron core, and the control performance of its control winding is also greatly improved, thus achieving large-scale Applications. However, the existing magnetic valve controllable reactor also has two disadvantages: first, the m...

AI Technical Summary

Problems solved by technology

However, the existing magnetic valve type controllable reactor also has two shortcomings: 1. The iron core is relatively difficult to manufacture, which hinders its large-scale development; 2. There is a certain influence between the DC excitation winding and the AC working winding.