SU1334270A1 - Asynchronous machine stator - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to the construction of the stator cores of asynchronous machines. The aim of the invention is to reduce losses in the stator core of asynchronous machines. The stator of the asynchronous machine consists of cores 1, laminated from electrical steel sheets. On the outer surface of the core there are laminated marks 2 and welding grooves 3, in which the weld seams 4 are placed. In the slots 5 of the stator core, formed by teeth 6, a single layer is laid on the three-phase winding with the number of slots per pole and phase equal to the whole number. The winding in the drawing is shown conventionally with the designation of the belonging of its conductors to the phase zones. Making charge marks and welding seams in places of minimum magnetic flux, along the axes of the winding phase zones, leads to a decrease in local pressure in the back of the stator core and, accordingly, to a decrease in magnetization current and losses in the back of the stator core. 1 il. i (L co oo N5 "sj

Description

The invention relates to electrical engineering, in particular to the design of the cores of asynchronous machines.

The purpose of the invention is to reduce losses in the stator core of an asynchronous machine,

The drawing shows the stator core of the asynchronous machine, the cross section.

The asynchronous machine stator consists of a core laminated from electrical steel sheets. On the outer surface of the core there are burden tags 2 and welding grooves 3 in which welding seams 4 are placed. In the slots 5 of the stator core, formed by teeth 6, a single-layer three-phase winding is laid with the number of grooves per pole and phase equal to the whole number. The winding in the drawing is shown conventionally. But with the designation of the belonging of its conductors to the phase zones A, B, C.

Welding seams and charge marks are made along the axes of the stator teeth located along the boundaries of the phase winding zones. The number of welding seams depends on the dimensions of the core Since the distribution of the amplitude of the magnetic flux in the back of the heart Compiler V. Krasnov Editor T. Lazorenko Tehred L. Serdyukova Corrector V. But ha

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INSIGHTS of the USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Perm-printing enterprise, Uzhgorod, st. Project, 4

342702

Since the stator nick is uneven, the arrangement of charge marks and welding seams, which, in their places, with performance reduces the effective cross section of the back of the stator core and thereby increases magnetic induction and, accordingly, magnetizing force, in places of minimum values of magnetic flux ( along the axes of the phase winding zones) leads to a decrease in local saturations in the back of the stator core and, accordingly, to a decrease in the magnetization current; 15 losses in the back, the stator core and its heating.

Claims (1)

Formula izbreten.i 20 The stator of an asynchronous machine, containing a core with grooves in which a multiphase single-layer winding with a whole number of grooves per pole and phase, teeth are laid, has teeth marks and welding grooves made on the outer surface of the core, that, in order to reduce losses, the labeling and welding grooves are made on the axis, 30 passing through the middle of the teeth, with the axes located along the boundaries of the phase zones of the stator winding.