SU951556A1 - Electric machine magnetic circuit - Google Patents

Description

one

The invention relates to electrical engineering, in particular to a magnetic circuit of an electrical machine.

The magnetic circuit of an electric machine is known, which contains a PMO and a dentate zone, which is corrugated from an electrical steel strip, so that the radial ribs of the corrugations are teeth

The disadvantages of this design are the increased magnetic resistance along the tops of the corrugations for the working magnetic flux of the machine, as well as increased losses from eddy currents in the toothed layer.

The closest to the invention is the magnetic circuit of the electric machine, which contains the rm and dentate zone, made of electrical steel strip, corrugated in the axial direction and having a width equal to the height of the tooth t. another corrugated strip covering each corrugated tooth, which complicates the manufacturing technology.

The purpose of the invention is to simplify the manufacturing technology.

The goal is achieved by the fact that in the magnetic circuit of an electric machine the extreme edges of the corrugations of adjacent teeth are soy-; dinene between the jumpers, made integral with the teeth and located in the end part of the magnetic circuit.

Moreover, the bridges between the teeth can be arranged alternately in one and the other end parts of the magnetic circuit.

In addition, the jumpers between the teeth can be made bent at the ends of the magnetic core.

In this case, the ribs of the corrugations of each tooth can be of different lengths along the axis of the machine.

Fig, 1 shows the magnetic circuit of the stator of an electric machine; in fig. 2 - one tooth, made of tape, corrugated along the axis of the machine; in fig. 3 section of the tooth zone with alternating jumpers, bottom view; Fig. the same, in, id from the side; in fig. 5 section of the tooth zone with bridges bent to the ends of the frame, side view; in fig. 6 - magnetic circuit with bridges bent to the ends of the frame, section.

The magnetic circuit of an electric machine, for example, a stator (see Fig. L) j, contains RM-1, made by any known method, for example, wound on an edge into a spiral. The teeth zone 2 is made of a corrugated tape with axial ribs 3 and i directed along the axis of the magnetic circuit 5. The outer edges 3 of a number of spaced teeth are connected by bridges 6, which are integral with the teeth

FIG. Figure 1 shows the tooth of the tooth zone, made with axial ribs 3 and directed along the axis of the magnetic circuit 5. To improve the quality of manufacturing of an electric machine, namely, reducing the likelihood of isolation of the stator winding, the edge edges 3 and intermediate edges k are of different lengths.

FIG. Figures 3 and f show two projections of a part of the magnetic circuit of the dentate zone with axial edges and jumpers 6 connecting the edge edges 3 of a number of spaced teeth. Moreover, the bridges 6 are integral with the teeth and are alternately arranged in one and the other end parts of the magnetic circuit. Making the jumpers 6 between the teeth makes it possible to fully automate the process of manufacturing the magnetic circuit of the tooth zone.

FIG. 5 shows part of the dentate area. A distinctive element of this design is that the jumpers 6 are deflected towards the frame and are made on one side. The advantage of this design for some magnetic circuits of electric machines is that with the help of jumpers 6 (Fig. 6), the additional attachment of the dentate zone 2 to the frame 1 is possible.

The principle of operation of the proposed electric machines does not differ from the operation of machines with a classical tooth zone.

The present invention may be implemented in the development of electrical machines, as well as commercially manufactured in the automotive, electrical and aeronautical industries.

The economic effect of the implementation of the invention can be obtained by reducing the labor intensity of manufacturing and improving the energy performance of electric machines.

A reduction in labor intensity can be obtained by canceling the doriowka surface of the dentate zone both from the side of the chassis and from the dentate zone.

Claims (3)

1. Magnetic circuit of the electric machine, containing rm and dentate an area made of electrical steel strip, corrugated in the axial direction and having a width equal to the height of the tooth, characterized in that, in order to simplify the manufacturing technology, the extreme edges of the corrugations of the adjacent teeth are interconnected by jumpers made together with the teeth and located in the face parts of the magnetic circuit. 2. Magnetic conductor according to claim 1, characterized in that the jumpers between the teeth are arranged alternately in one and the other end parts of the magnetic circuit. 3. Magnetic conductor on PP. 1 and 2, characterized in that the bridges between the teeth are made bent at the ends of the magnetic core circuit. C. Magnetic on PP. 1-3, which is different in that the ribs of the corrugations of each tooth are made of different lengths along the axis of the machine.  Information sources, taken into account in the examination ,one. US patent number 3-983.35, cl. 310-259, 1975. 3 2. USSR author's certificate according to application No. 290 2bЗ / 2-07, cl. And 02 K 1/06, 1980. V Kj fig.g A 3 zLyL // rx / 7 / five FIG. J 6 ht