SU752521A1

SU752521A1 - Induction apparatus

Info

Publication number: SU752521A1
Application number: SU782600379A
Authority: SU
Inventors: Юрий Львович Бончковский; Василий Михайлович Кириллов; Семен Иосифович Майзус
Original assignee: Предприятие П/Я В-8833
Priority date: 1978-04-06
Filing date: 1978-04-06
Publication date: 1980-07-30

Description

1one

Изобретение относитс к электротехнике и может быть использовано в мощных силовых , печных и других трансформаторах с большим потоком рассе ни .The invention relates to electrical engineering and can be used in high-power power, furnace and other transformers with a high scattering flux.

Известен мощный силовой трансформатор , содержащий бак, остов, на стержн х которого расположены обмотки, и рмовые балки дл прессовки рм остова 1.A powerful power transformer is known, comprising a tank, a core, on the rods of which windings are located, and frame beams for pressing PM core 1.

Нижние рмовые балки состо т из стенки нижней и верхней полок и ребер жесткости. Така конструкци рмовых балок не содержит никаких средств дл снижени локальных перегревов элементов металлоконструкции и добаврчных потерь, вызываемых в стенке бака и рмовых балках потоком рассе ни .The lower frame beams consist of the wall of the lower and upper shelves and stiffeners. This design of the beam beams does not contain any means for reducing the local overheating of the metalworking elements and the incremental loss caused by the scatter flow in the tank wall and the beam beams.

Недостатком таких трансформаторов вл ютс значительные добавочные потери и высокие локальные нагревы в элементах металлоконструкции, что может вызвать повышенный нагрев и аварию трансформатора .The disadvantage of such transformers is significant additional losses and high localized heating in the metalwork elements, which can cause increased heating and transformer failure.

Известен также индукционный аппарат, например автотрансформатор, содержащий бак, остов с размещенными на его стержн х обмотками и рмовые балки, состо щие изAn induction apparatus is also known, for example an autotransformer comprising a tank, a core with windings placed on its rods, and frame beams consisting of

стенки, полок и ребер жесткости, электрически соединенных со стенкой 2.walls, shelves and stiffeners electrically connected to the wall 2.

В таком аппарате обмотки низкого напр жени рассчитаны на большие токи, достигающие дес тков килоампер, и, следователь , обладают повышенными добавочными потер ми и локальным нагревом элементов металлоконструкции.In such an apparatus, low voltage windings are designed for large currents reaching tens of kiloamps, and, an investigator, have increased additional losses and local heating of the metalworking elements.

С целью снижени добавочных потерь и локальных перегревов элементов конструкции от потоков рассе ни на верхних 10 полках нижних рмовых балок устанавливаютс магнитные шунты.In order to reduce the incremental losses and local overheating of structural elements from the scattering fluxes, magnetic shunts are installed on the top 10 shelves of the lower frame beams.

Такие системы шунтировани защищают рмовые балки от пол рассе ни обмоток. Однако, при этом необходимы системы элементов дл закреплени щунтов и изол ции щунтов на полках рмовых балок, увеличиваютс расход дорогосто щей электротехнической стали и трудоемкость. Кроме этого, необходимо увеличение габарита высоты трансформаторов на высоту пакетов 20 щунта, располагаемых между верхней полкой нижних рмовых балок и нижними торцами обмоток.Such shunting systems protect the beam beams from the floor of the scattered windings. However, this requires a system of elements for securing the shunt and isolating the shunt on the shelves of the floor beams, increasing the consumption of expensive electrical steel and labor intensity. In addition, it is necessary to increase the size of the transformer height by the height of the packages of 20 shunt located between the upper shelf of the lower frame beams and the lower ends of the windings.

Claims

These shortcomings limit the scope of widespread use of beam constructions with a shunting system, for example, in autotransformers, especially limiting powers, where there are many windings (up to 4) on the core core and the taps from the inner windings are located between the lower ends of the windings and the upper flange of the lower beam, i.e., in the shunt package location area, since it is necessary to increase the gap from the outlet to the upper shelf of the lower frame beam to the crowd of shunt packages, which increases the height of the active part, and, as stated above, the height of transformers. The aim of the invention is to reduce the size and additional losses. This goal is achieved by the fact that an induction apparatus, for example an autotransformer containing a tank, a core with windings scattered on its rods and chimney beams consisting of a wall, shelves and stiffeners electrically connected to the wall, are equipped with dielectric plates, and the chimney beams the conductor by shi jumpers, while the conductive jumpers are fastened to the outer ends of the stiffeners of the chassis beams with the formation between the jumpers, stiffeners and the wall of closed circuits, on which from the windings side become dielectric plates. FIG. 1 shows the induction apparatus, a section along the transverse phase axis of the profile projection; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2. A powerful high-dissipated power autotransformer (Fig. 1) contains a tank 1, a core 2 with windings 3 located on its rods, and a beam 4 for pressing the PM core, which consist (Fig. 1, 2) of a wall 5, shelves 6 and stiffening ribs 7 electrically connected to the walls of the beams. The outer ends of the adjacent stiffeners of the lower frame beams are connected by conductive bridges 8, which form closed electrical circuits 9 (Fig. 2) with stiffeners and the wall of the beam, and are mounted above the contours dielectric plates 10 dl support windings (Fig. 1, 2, 3). The presence of closed electrical circuits 9 in the path of the magnetic flux of the scattering creates additional magnetic resistance. In such circuits, EMF is induced when a magnetic flux is flowing through it. Since the circuit has a finite value of electrical resistance, a current that arises will flow through it, and at the same time the EMF of self-induction and the flow directed to expel the magnetic flux that created this current, i.e. the magnetic flux dissipating the windings. The displaced dispersion flow will be deflected to the sides and directed towards the active steel of the core and the vessel of the apparatus. In order to reduce local heatings in zone 11 (Fig. 3), on the upper flange of the beam, the beam can be additionally installed against the wall of the shunt 12 in the interfacial areas or along the entire length of the flange. The use of the invention will reduce the height of the active part by the height of the packages of magnetic shunts and, therefore, the induction apparatus, reduce the consumption of expensive electrical steel used for shunts - about 1 ton and significantly reduce the labor costs for manufacturing devices to reduce the additional losses in the tank walls and frame beams . Induction apparatus, for example, an autotransformer containing a tank, a core with windings placed on its rods and chimney beams consisting of a wall, shelves and stiffeners electrically connected to the wall, characterized in that in order to reduce overall dimensions and additional losses , the induction apparatus is equipped with dielectric plates, and the beam beams are conductive bridges, while the current-carrying bridges are fastened to the outer ends of the stiffeners of the beam beams to form between the bridges, p gotu kola wall stiffness and closed loops on which the part windings mounted dielectric plates. Sources of information taken into account in the examination 1. Petrov G. N. Electric machines. M., “Energie, 1974, Part I, p. 230, fig. 2- 265 a.

2. USSR author's certificate number 261557, cl. H 01 F 27/36, 1969. (O