Stereoscopic voltage-reduction-type multipulse autotransformer rectifier

Abstract

The invention discloses a stereoscopic voltage-reduction-type multipulse autotransformer rectifier, and belongs to the technical field of transformers. The stereoscopic voltage-reduction-type multipulse autotransformer rectifier comprises a transformer body, the transformer body comprises three coils which are stereoscopically distributed in a triangle shape, the surfaces of the coils are coated with epoxy resin insulation layers, and the epoxy resin insulation layers are filled with multiple U-shaped optical fiber light guide bars which are uniformly distributed; a triangular base is connected to the lower ends of the coils, three detection rings matched with the coils are arranged at the side, close to the coils, of the triangular base, a connecting plate is fixedly connected between every two detection rings, and assembly holes are punched in the connecting plates. By means of the stereoscopic voltage-reduction-type multipulse autotransformer rectifier, the resin insulation layers of a transformer can be automatically detected in real time through the light guide property of optical fibers, once the bad phenomena such as creepage and breakage occur, a technicist can be timely informed to conduct maintaining and overhauling, the running safety of the transformer is obviously improved, and the situation that the service life of the transformer body is seriously influenced by insulation breakdown cannot easily occur.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a three-dimensional step-down multi-pulse autotransformer rectifier. Background technique [0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, wharf CNC mechanical equipment and other places. Simply put, dry-type transformers refer to transformers whose iron core and windings are not immersed in insulating oil. The iron core is mainly composed of silicon steel sheets. Composed of coils cast with epoxy resin, an insulating cylinder is placed between the high and low voltage coils to increase electrical insulation, and the coils are supported and restrained by pads, and the fasteners overlapping the parts have anti-loosening properties. The number of output voltage pulses can be divided into 12 pulses, 18 pulses, 24 pulses, 30 pulses, etc., so that the grid side current becomes the corresponding number of pulses. The more pulses, the...

AI Technical Summary

Problems solved by technology

[0005] Resin-insulated dry-type transformers use resin casting as the main insulation, so the resin insulation layer determines the insulation performance of the transformer, and then determines the stability and reliability of the transformer during operation, but the existing resin insulation layer has a long service life in the transformer Creepage, breakage (internal cracking) and other phenomena are prone to occur when the transformer is damaged. Such phenomena are not easy to be directly observed by technicians. Once they are not discovered in time and left unattended, it is easy to cause damage to the transformer or even a major safety accident.

Images