RU1805507C - Three-phase transformer - Google Patents

Abstract

Usage: in the field of electrical engineering. Essence: The transformer has two cores 2, 3 located in parallel planes, and one core located perpendicular to the first two. The sections of the primary winding, connected in pairs in parallel-wise, are wound on the core rods. Secondary windings of all phases span two rods at a time. Between each pair of sections of the primary three-phase winding related to different phases, non-magnetic metal inserts are installed that provide a fixed distance between the sections. The additional paragraphs indicate the specific distance between the sections. 2 s. P. f-ly, 1 ill.

Description

The invention relates to the field of electrical engineering, in particular to power transformers of power supply devices for electronic and other equipment, including for consumers with increased requirements for the symmetry of the parameters of the secondary phase windings.

The purpose of the invention is to increase the degree of suppression of asymmetrical impulse noise from the power supply network, increasing the symmetry of the output parameters while ensuring high overall dimensions.

: The drawing shows the proposed j three-phase transformer in section. A three-phase transformer contains three magnetic cores of 1, 2, 3 types of submarines of square cross section, on the rods of which are 6 sections of a three-phase primary winding with the same number of turns connected in pairs in parallel, according to 4 and 5, b and 7, 8 and 9, connected in a three-phase triangle

or a star. The secondary windings 10, 11, 12 with the same number of turns are wound on the primary windings 4-9, covering pairs of adjacent rods of different phases. In this case, the cross-sectional shape of the magnetic cores can be either square or rectangular, which does not affect the efficiency of the degree of suppression of interference, and subject to condition b-a-c-c, the symmetry conditions of the transformer parameters are met, where a and b are the width and the thickness of the magnetic circuit, c is the width of its window; c is the distance between parallel and deployed magnetic cores.

To increase the capacity of the transformer windings relative to the housing in a space limited by parts of the inner side surfaces of the secondary phase winding and the outer side surfaces of the primary windings, non-magnetic metal inserts mounted on a metal

00

o ate o

h |

associated with the magnetic cores, a housing base covering side surfaces and a transformer base. These inserts can be made hollow (tubular) with liquid cooling, which provides a more efficient thermal regime of the device.

Claims (3)

Formula from Acquisition 1. A three-phase transformer containing three magnetically coupled, a primary three-phase winding, each phase of which consists of two parallel sections according to the connected sections, each located on the separate rod of one magnetic core, a secondary three-phase winding, two phases of which cover two adjacent sections primary winding of two different phases, characterized in that, in order to increase the degree of suppression of asymmetrical impulse noise and increase the symmetry of the output parameters, it has non-magnetic metallic inserts, metal structural base, two magnetic cores are arranged in parallel 5 0 planes, the third magnetic circuit is perpendicular to the first two, the third phase of the secondary winding covers two adjacent rods, different phases of the primary winding, between each of the pair of sections of the primary three-phase winding related to different phases, a non-magnetic metal insert is mounted, mounted on a metal a structural base associated with magnetic cores and with said inserts. 2. The transformer according to claim 1, with the exception that the distance between sections of the primary three-phase winding related to different phases is equal to the sum of twice the thickness of the phase secondary winding and the maximum distance between coils assembly. 3. The transformer according to claim 1, with torn, and so that, in order to ensure the unification of the elements of the transformer, the magnetic cores have a square cross section, and the distance between the magnetic cores is equal to the window width.