SU1640777A1 - Electrical machine packeted stator - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to expand the scope of application while improving heat transfer and energy characteristics. The packaged stator contains a magnetic pipe with a belt of alternating turns of tape and corrugations of different heights. Low corrugations are installed in coils, and high - between the packages. 8 il.

Description

The invention relates to electrical engineering, in particular, to the design of a wasteless production of a stator of an electric motor with improved cooling, preferably a stator of an alternating-current motor of medium and high power with radial ventilation channels in the magnetic core.

The purpose of the invention is to expand the scope of application while improving heat transfer and energy characteristics.

FIG. 1 shows a stator of AC electric machines, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3-7 is a diagram of a method for manufacturing a corrugated mortgage element; in fig. 8 - mortgage element, general view.

The stator magnet core consists of plates 1 wound of steel tape with teeth 2. interconnected jumpers 3. And the teeth have a trapezoidal shape.

The lintels have a width dimension in the radial direction equal to four thicknesses of the tape, from experimental considerations capable of deforming without breaks.

Between the teeth 2 there are deep rectangular grooves 4 (Fig. 2). In order to obtain a round stator plate from a flat plate-blank 1 with grooves 4, the blank is rolled into a cylinder by mechanical deformation with respect to lintel 3.

The slots 4 are equipped with embedded elements 5, the general view of which is shown in FIG. 8. The embedded element 5 is a corrugated steel plate with corrugations of various heights — in the RMA zone — low corrugations 6, between the packages — high corrugations 7.

Plates 8 are assembled from plates 1, between which, thanks to elements 7, radial ventilation channels 9 are formed.

The width of the low corrugations 6 is equal to the width of the grooves 4 in the zone of the PM, and the height of the corrugations is equal to the height of the ROM (together with the height of the jumpers 3). The width of the high corrugations 7 is equal to the width of the radial ventilation channel 9. In this case, the tops of the high corrugations 7 are located in the annular gap 10 between the back of the magnetic circuit 1 and the housing 11 and are fastened (poured into the massif of the housing 11 during its formation from the melt

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aluminum) thermally and mechanically with it and cooling fins 12. The elements 5 are bonded to the plate packs 1 by welding 13 and form a mechanically strong joint.

The stator is made in c / geduing sequence.

First, two identical blanks 1 (flat dies) with teeth 2, lintels 3 and deep grooves 4 are cut out of the steel coil strip without beams.

The packages 8 are grouped from the plates 1, the embedded element 5, corrugated from the tape, is placed in the grooves 4. The final stator magnetic core is fastened with the housing 11 by pouring over aluminum in a special form (not shown) with molten aluminum. The winding of the stator 15 in the grooves 4 can be installed either prior to the aluminum filling of the magnetic core, or after the filling.

The insertion element 5 (Fig. 8 is made by stamping from the roll 16 of the workpiece 17 (Fig. 3) with a common web 18, holding plates 19 (Fig. 4), which are then crimped, for example, between gears 20 (Fig. 5) the formation of various corrugations - heights 6 and 7. As a result, the blanks of the mortgage element 5 are obtained, which are then pressed together in the integral device 21 and 22 (Fig. 7). it was stated that after stacking 4 packs of plates into the grooves, plates 1 are rolled together into cyl etc. in a special fixture (not shown). Execution of the proposed stator corrugations of different heights in the yoke and between packets, the arrangement of vertices in the high ribs koptsevom channel between the core and the housing back and bonding them with heat in the housing intensifies

internal circuit of electric machines of medium and high power. This ensures the reduction of heating losses, normal temperature conditions and almost waste-free production of machines.

The proposed stator, in comparison with the known, is characterized by an increased heat removal capacity in the internal circuit, since high corrugations 7

play the role of heat-removing elements from the magnetic core to the well-cooled outside air (solid lines with arrows in FIG. 1) to the cutter body 11. In addition, these corrugations perform the role of efficient turbulators for internal air (dotted lines with arrows in FIG. 1), which increases the heat transfer coefficients and reduces the temperature of the stator windings 15.

Claims (1)

The invention The packaged stator of an electric machine of alternating current, mainly of medium and high power, contains a magnetic core with a winding, the rm of which is made of a composite in the form of alternating turns of steel tape wound around an edge and made of flat tape of different height perpendicular to the longitudinal axis of the stator, and the silver casing, characterized in that, in order to expand the scope of application while improving heat transfer and energy characteristics, rounds of the tape are made deep grooves in which low corrugations are installed within one package, and high, made in the form of spacers and heat exchange elements, corrugations are located between the packages, while the tops of high corrugations are installed in the annular space between the magnetic conductor and the body, are rigidly fastened with between them, the image between the high corrugations, the hull and the rme is axial, and between the packages there are radial ventilation ducts. BUT  Outdoor 12 13 1 2 3 5 7 10 L air «ill M JI Inner Air Figg d Fi.Z Fig.Ch X X 17 Јg FI.5 mimmimmi wmwm wmmmim uiMMmuimuif SHShShSh 5 13 FIG. 6  22 3 / j j Ft.7 Phage. eight