An adjustable autotransformer with automatic locking of carbon brush arm length

Abstract

The invention relates to an adjustable auto-transformer capable of automatically locking a carbon brush arm length. The adjustable auto-transformer comprises a shell, an annular iron core, a winding and a carbon brush arm and is characterized in that the shell is hollow and cylindrical, the center of the lower end face of the shell is provided with a lower through hole, the upper edge of the lowerthrough hole is provided with an inner threaded cylinder, the lateral wall of the inner threaded cylinder is longitudinally provided with an outer routing hole, the upper end of the shell is providedwith an opening and detachably connected with an annular upper cover, and the inner end face of the lateral wall of the shell is provided with a pawl and an unlocking protruding head; the carbon brush arm comprises a hollow circular tube, a carbon brush support, a lead device, a drive handle and a drive swing arm. The adjustable auto-transformer has the advantages that the radial length from thecontact part of a carbon brush body and the winding to the axis of the hollow circular tube can be adjusted precisely; a rotary mandrel can be locked through a locking ejector pin to finally fix the position of the carbon brush body, and radial deviation of the carbon brush body when the carbon brush body operates along with the drive swing arm is avoided.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to an adjustable autotransformer that automatically locks the length of a carbon brush arm. Background technique [0002] The functions of the voltage regulator and the transformer are similar, and they both perform voltage transformation. Unlike a transformer, the output voltage of a voltage regulator can be adjusted. In the rural power supply and distribution system, due to the long-distance power transmission, the voltage loss is serious, and the power supply terminal often cannot reach the predetermined voltage, so a voltage regulator is used for voltage stabilization. In the electrical test process, there are devices with different voltage levels in the power distribution station, so power supplies with different voltages are required to supply power to the devices, and voltage regulators can play an important role. [0003] In the above application process, alth...

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Problems solved by technology

[0003] In the above application process, although the output of the voltage regulator is from 0 to the maximum value, the voltage output value applied in the actual process is only in a specific small range

And because the length of the carbon brush is fixed, the trajectory formed by the carbon brush during rotation is a circular trajectory with a fixed radius, so that the winding is constantly worn on the circular trajectory, and even burns out the equipment.

However, the windings are well maintained at other radius circle tracks and cannot be effectively utilized.

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