SU1676005A1 - Electric machine stator - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to simplify the manufacturing technology, save non-ferrous metals, improve energy performance. The stator contains a magnetic core with an annular winding, covering the RMO. Due to the fact that the magnetic core has radial parts located end-to-end or with air gaps filled with magnetodielectric material, the goal is achieved. 3 hp f-ly, 2 ill.

Description

The invention relates to electrical engineering and can be used in the construction of AC electric machines, for example, asynchronous motors.

The aim of the invention is to simplify the technology, save non-ferrous metals and improve energy performance.

FIG. 1 shows a stator, a longitudinal section; in fig. 2 - the same cross section.

The stator of the electric machine (Fig. 1) contains a cylindrical magnetic core 1 consisting of radially arranged blocks 2 (Fig. 2). The blocks 2 are in contact with one another on the side surfaces 3. The blocks 2 are made of plates 4 having an opening zone 5, teeth 6 and grooves 7 opened from the side of the magnetic core bore. The number of slots 7 (or teeth) in one block is equal to or greater than the number of slots per pole and phase, which is equal to Zi / 2pm, where Zi is the number of stator slots, 2p is the number of winding poles, m is the number of winding phases. Three slots are made in one block (Fig. 2).

In the grooves 7 of the block are placed the coils of the winding 8, covering the rm zone 5. The coils of the block can be wound onto the block with one continuous wire and form a phase zone of the winding. Frontal (inactive) parts of the phase zone of the winding 8 are evenly distributed over the surface of the insulating lining 9 installed on the outer surface of the magnetic circuit unit. The plate 9 has protrusions 10. in which annular channels 11 are provided. In channels 11, fastening blocks 2, bands 12 and conductive elements 13 (conductors, busbars, wiring wires) are made, making electrical connections in the winding.

Bands 12 are made of insulating or other type of material. Between adjacent blocks 2 there is an air gap 14, which is filled with magnetodielectric material 15. A longitudinal wedge 16 (wedge) of magnetically soft material is installed in the tooth-like zone of the blocks 15, and the side surfaces of the wedge are covered with insulating

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composition, the height of the wedge is equal to or less than the height of the groove, and the volume above the wedge 16 and the side surfaces 3 of the blocks 2 is made with a machine dielectric material.

The stator is made as follows.

Block 2 is installed on block 2, attached with an adhesive composition, isolates the grooves and winds one phase winding into the slots of the block 2 with a single continuous layer; block 2 with phase zones of the winding is assembled into a ring, install a wedge 16 as necessary and fill the air gaps 14 of the magnetodislectron. 1 ches: / m material; shrink blocks 2 bandages 12; impregnate with insulating composition and dry, make electrical connections between the phase zones and install wiring for the output winding ends.

In the manufacture of the stator of an electric machine, conductive, magnetically conductive, insulating, adhesive, impregnating and structural materials are currently used in the electrical industry.

Winding and assembly operations can be easily mechanized.

The implementation of the stator magnetic core 13 of radically arranged blocks with the slots open from the side of the bore and the number of which in the block is equal to or greater than the number of the groove pole and phase makes it possible to reduce the number of stator assembly units several times in comparison with the known method of execution.

The radial assembly of the magnetic core blocks, especially the assembly with air gaps, drastically reduces the requirements for precision manufacturing of the block plates and side surfaces of the blocks. Laying the winding into the block can be easily mechanized, eliminating the need for inter-joint connections in the phase zone. Insulating lining, which serves as a cabinet insulation, at the same time performs the role of phase-to-phase insulation in the zone of the winding frontal parts.

Installing bandages in the annular channels is simple to implement and securely holds the blocks together. All this provides a simplification of the manufacture technology of the stator. In addition, the stator is easily repaired by replacing a unit with a damaged winding.

Filling the air gaps between the blocks with a magnetically conductive material also helps to reduce the magnetic resistance of the PM.

The uniform distribution of phase phase conductors along the arc of the insulating lining between its protrusions reduces the average length of the winding coil and contributes to saving non-ferrous metals by reducing the consumption of the winding wire.

Performing the coil group with a continuous wire reduces the number of rations in the winding, thereby saving the solder and reducing the laboriousness of the winding.

The installation of longitudinal wedges of magnetically soft material in the tooth zone between the blocks simplifies the assembly technology of the magnetic circuit with air gaps between the blocks due to the simplicity

the installation of blocks one against the other and eliminates magnetic asymmetry in the tooth zone.

Claims (4)

1. An electric machine stator containing a cylindrical magnetic core, in the slots of which the phases of an annular winding encompassing PMO are located, characterized in that, in order to simplify the technology, saving color metals and improved energy performance, the stator magnetic circuit around the circumference is made of separate radial parts with grooves open from the bore of the magnetic core, and the number of grooves in each radial part is not less than the number of grooves per pole and phase of the winding, with adjacent radial parts of the magnetic conductors butt or between them there is a gap filled with magnetodielectric material. 2. A stator according to claim 1, characterized in that in the gap between the adjacent radial parts of the magnetic circuit in the slot zone, longitudinal wedges of magnetically soft material are installed. 3.Stator on PP. 1 and 2, characterized in that insulating plates with radial protrusions are installed on the outer surface of the radial parts of the magnetic circuit, and the winding covers the said plates. 4. The stator according to claim 3, characterized in that the protrusions of the insulation tabs annular grooves are made to place the elements electrically. connecting the phase zones of the winding, and to accommodate bandages that fasten the magnetic core. 10 9 12 TO w ™  W  //// gs Phage A 180 ° / pm eleven Fyu.g