Patent ID: 9013905
Filing Date: 2015-04-21
Classification: H01F,H02M,H02P

Abstract:
1. A three-phase 48-pulse rectifier transformer comprising two 24-pulse rectifier transformers with phase-shifted valve-side output windings, wherein: each 24-pulse rectifier transformer includes two sets of grid-side input windings and four sets of valve-side output windings; the two sets of grid-side input windings are connected in parallel and arranged in an axially split manner; the two sets of valve-side output windings among the four sets of valve side output windings are corresponding radially arranged with one set of grid-side input winding in a split manner, and the other two sets of valve-side output windings are also corresponding radially arranged with the other set of grid-side input winding in a split manner; the two sets of valve-side output windings radially split mutually are arranged in an axially split manner with the other two sets of valve-side output windings radially split mutually; the grid-side input windings of the two 24-pulse rectifier transformers are phase-shifted mutually, so that the uniform difference between the voltages of eight sets of valve-side output windings of the two 24-pulse rectifier transformers is 7.5°, and the eight sets of valve side output windings of the two 24-pulse rectifier transformers are corresponding connected with rectifiers to form a uniform 48-pulse rectifier transformer.