Electromagnetic rheostat

Abstract

The invention belongs to the technical field of electric power, and particularly relates to an electromagnetic rheostat. The invention provides the electromagnetic rheostat. The rheostat comprises a magnet exciting coil 23-1, an armature 23-2, a spring 23-3 and a sliding rheostat 23-7, the armature 23-2 is arranged on one side of the magnet exciting coil 23-1, the end, away from the magnet exciting coil 23-1, of the armature 23-2 is connected with one end of a spring 23-3, the other end of the spring 23-3 is connected with the supporting body, and the magnet exciting coil 23-1 is fixed to thesupporting structure and kept fixed in position; a front excitation scribing piece and a rear excitation scribing piece are arranged at the lower end of the excitation coil 23-1 in the length direction of the excitation coil 23-1, the upper end of each excitation scribing piece is electrically connected with the lower end of the excitation coil 23-1, the excitation scribing piece is connected andlinked with the armature 23-2 through an insulation connecting piece 23-5, and the insulation connecting piece is connected with a sliding piece base of the sliding rheostat 23-7.

Description

technical field [0001] The invention belongs to the technical field of electric power, in particular to an electromagnetic rheostat. Background technique [0002] In the construction of railway engineering, in order to ensure the normal operation of electric locomotives, the installation of some interval equipment is often involved to ensure the safety of traffic, but the introduction of its power supply requires the laying of several kilometers or even tens of kilometers of power cables to supply power to it. With the rapid development of power electronics technology, some high-power interval equipment in railways can be changed to low-power equipment in essence. For example, the interval track signal indicator light, the 220V voltage halogen lamp currently used can be changed to use DC 12V or 24V The LED indicator light can not only reduce the power, but also ensure the luminous intensity. In actual situations, there are many individual devices with fixed positions in the...

AI Technical Summary

Problems solved by technology

In actual situations, there are many individual devices with fixed positions in the section, and the low-voltage power supply cannot be directly obtained from the adjacent power line, but needs to be transmitted through 220V or 380V power cables, and obtained after transformation and rectification, which not only causes waste of materials, but also suffers from Due to the influence of the voltage drop problem, the transmission distance is limited. To extend the power supply distance, the only way to increase the cross-section of the wire or increase the voltage at the head end is to increase the economic investment.

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