KR20020081385A - Component for the rotor or stator of an electrical machine - Google Patents

Abstract

The component 1 according to the invention consists of at least two support bodies 3, 5 with pole teeth 11, the spacing between the directly adjacent pole teeth 11 of the individual support bodies 3, 5. The winding process or installation of the coil is very simple and is so large that optimal filling between the pole teeth 11 is achieved.

Description

Component for the rotor or stator of an electrical machine

In EP 730 334 A1 a stator for an electric cathode machine is known, in which the stator is assembled in two parts. Due to the split into two parts of the stator the individual parts cannot be wound and must be assembled with a prefabricated coil. The advantage of a stator assembled in this way arises only in practically two poles. Of course, embodiments of multiple poles are presented, but only additional coils are dealt with, and certain advantages of grooves with improved filling are no longer achieved at two or more poles.

In JP 2000209794 A1 or US-PS 5,859,486 a stator consisting of a plurality of segments is known, such as pole teeth. This results in a large number of parts that must be assembled in a complex manner.

In US-PS 5,552,651 a rotor consisting of two parts is known. However, the rotor does not have a winding around the pole teeth.

Also known are stators or rotors with teeth set individually. In this case each individual fault must be fixed, which results in a complex assembly process. The stator has reduced stability. In addition, each individual coil must be contacted, which results in a large number of contact locations and complex windings with, for example, punching scraps.

The present invention relates to parts for rotors or stators of electric machines.

Embodiments of the invention are shown briefly in the drawings and described in more detail in the following description.

1a is a first embodiment of a component according to the invention in an unassembled state,

1B is a partially assembled state,

1C is in an assembled state,

2a is a further embodiment of a component according to the invention in an unassembled state,

2B is partially assembled.

3a is a further embodiment of a component according to the invention in an unassembled state,

3B shows the assembled state.

The parts according to the invention for an electric machine with the features of claim 1 have the advantage that in a simple manner the parts for the electric machine are optimally filled with grooves by means of windings and coil packets. Thus, a smaller sized electric machine can be obtained. In addition, very simple conditions for the winding process are created, such that different winding processes such as pliers winding and needle winding can be used. Any small groove opening can also be made because the winding wire does not have to be provided through the groove opening upon winding. Likewise, coils with very thick wires can be implemented.

If the pole teeth of the parts directly adjacent in the circumferential direction are not formed of the same support body, a favorable condition for the winding process is formed, because there is a larger gap between the pole teeth of one unique support body. to be. As the winding is made of two parts (FIGS. 1,2) or completely (FIG. 3), the number of wire ends is reduced when compared to the individually set teeth. This results in very simple winding and contacting techniques.

The support body consists of a steel laminate in a preferred manner, since the vortex is thereby minimized.

The support body is made of a plastic / magnetic material in a preferred way because it can be produced simply.

Such parts can form stators or rotors in a preferred manner,

1 a shows a part 1 according to the invention in an unassembled state. The component 1 can be excited magnetically, for example by an electric coil or by magnetism, for example used for an electric machine such as a motor or a generator.

The component 1 consists of at least a first support body 3 and a second support body 5. The two support bodies 3, 5 are identical, for example, assembled in the axial direction 7 and fixed to each other. The axial direction 7 forms the central axis 7 of the component 1, for example.

The support bodies 3, 5 comprise for example an outer ring 9, in which at least one pole tooth 11 is formed, for example. The pole teeth 11 are embodied, for example, in one piece together with the outer ring 9, but the pole teeth 11 can also be fixed to the ring 9, for example by insertion or injection. In this embodiment three pole teeth 11 are provided, for example formed in the form of swallow tails, which pole teeth are integrally formed with the outer ring 8. The pole teeth 11 protrude above the ring 9 in the axial direction 7.

In order to secure the support bodies 3, 5 side by side downwards the pole teeth 11 comprise insert elements 13, for example at the outer circumference, which insert elements ring 9 of the other support bodies 5, 3. It is inserted into the corresponding groove 15 in. The support bodies 3, 5 are thus prevented from rotating with each other in the radial direction. At the same time, for example, when a press fitting is made between the insertion element 13 and the groove 15, the support bodies 3 and 5 can be fixed to each other. The support bodies 3, 5 can also be fixed to each other in different ways. The part 1 now has six pole teeth 11.

The support bodies 3, 5 are made of, for example, steel laminate or massive material. The support bodies 3, 5 may also consist of a mixture of plastic and magnetic material, in particular soft magnetic material, which mixture is for example injection molded. By magnetic material is meant a material that can be magnetized and / or a magnetized material. The material may be ferromagnetic and / or soft magnetic.

One of the support bodies 3, 5 may consist of a steel laminate and the other consists of a mixture of plastic and magnetic material.

1b shows a part 1 in which the support bodies 3, 5 are partially fitted together. The insertion elements 13, for example formed in the form of ring segments of the support bodies 3, 5, directly adjoin one another in the circumferential direction. By assembling the support bodies 3, 5, the pole teeth 11 of the first support body 3 extend between the pole teeth 11 of the second support body 5.

1c shows the part 1 in an assembled state. In the circumferential direction, the pole teeth 11 are formed, for example, with different support bodies 3, 5. Likewise the rings 9 of the support bodies 3, 5 and the insertion element 13 and the grooves 15 of the support bodies 3, 5 directly adjoin one another, which almost form the outer ring 9. This part 1 is used for the rotor of the internal rotor motor.

In the unassembled state as shown in FIG. 1A, a pre-fabricated coil packet 17 is already arranged around each pole tooth 11 or the winding 17 is wound. The coil 17 is not intentionally shown in FIGS. 1A and 1B, showing how the support bodies 3, 5 are formed and how they fit together. The large spacing of the pole teeth 11 of the individual support bodies 3, 5 in the unassembled state leaves much space for winding tools, in particular needles, winding machines, in the winding process, which greatly simplifies the winding process. Since the coils 17 can be fitted very closely together in the axial direction 7, the space between the pole teeth 11 is optimally filled in the assembled state (Fig. 1C). There must be enough space in the winding process, for example for the winding needle, ie the gap for the next coil 17, because otherwise the winding needle is cool ramped.

2a shows a further embodiment of a part 1 according to the invention. The component 1 likewise consists of two support bodies 3, 5, for example, which support body is arranged in the inner ring 9 and extends away from the ring 9 in radial and axial directions 11. ). The support bodies 3, 5 are assembled in a similar manner as described in FIGS. 1A, 1B and 1C. For this purpose a ring segmented insertion element 13 is formed, for example, in the pole teeth 11 facing the ring 9, which insertion groove is a groove for the insertion of the insertion element 13 of the other support bodies 3, 5. It is formed between (11). In addition, here, for example, the coil 17 already exists around the pole teeth 11 formed, for example, the swallow tail, but the coil is not shown here for ease of overview.

2b shows the part 1 in a partially assembled state, and FIG. 2c shows the part in an assembled state. The ring 9 of the support bodies 3, 5, in the assembled state, forms a ring 9 ′ comprising an opening 19, into which the rotor shaft is inserted and fixed, for example.

This component 1 is for example a rotor for an external rotor motor or a rotor for an internal rotor motor.

3A and 3B are provided with support bodies 3 and 5 according to the description of FIGS. 2A, 2B and 2C. However, the first support body 5 comprises an intermediate pole 11 ′ formed differently from the pole teeth 11 of the second support body 3. That is, the middle pole 11 ′ includes a pole head 21 formed narrower than the pole teeth 11 in the circumferential direction. The coil 17 is not arranged around the middle pole 11 'or the winding is not wound. So-called intermediate poles 11 'are used for magnetic flow guides.

The winding can be provided on the support body 3 completely without interruption. To the ring 9 there is provided an insertion element 13 and a groove 15 which are used for assembly in the intermediate pole 11 ′ and pole teeth 11.

Claims (10)

In a magnetically excitable electrical machine component consisting of at least one support body, At least two support bodies (3,5) are assembled in an axial direction (7) to form a part (1). The method of claim 1, At least one support body 3, 5 comprises at least one pole tooth 11, Component, characterized in that at least one coil (17) is arranged around the pole teeth (11). The method according to claim 1 or 2, At least one support body 3, 5 comprises a pole tooth 11, Part, characterized in that the pole teeth (11) of the part (1) immediately adjacent in the circumferential direction are not formed of the same support body (3,5). The method according to claim 1,2 or 3, Part, characterized in that the support body (3,5) is made of steel laminate. The method of claim 2 or 3, Part, characterized in that the pole teeth (11) are at least partly connected to a ring (9) of the support body (3,5). The method according to claim 1 or 3, Part, characterized in that the part (1) forms a stator. The method according to claim 1 or 3, Part, characterized in that the part (1) forms a rotor. The method of claim 2, 3 or 4, At least one support body 3, 5 comprises at least one insertion element 13 and at least one support body 3, 5 comprises at least one groove 15 for the insertion element 13, Component, characterized in that the support bodies (3,5) are connected to each other by at least one insertion element (13) and at least one groove (15), so that they do not rotate together. The method according to any one of claims 1 to 8, The first support bodies 3, 5 have pole teeth 11 including coils 17, and the second support bodies 3, 5 are provided with intermediate poles 11 ′, centering on the intermediate poles. The coil is not arranged, and the intermediate pole is placed between the pole teeth (11) in the circumferential direction after assembly of the support body (3,5). The method according to claim 1,2,3 or 4, Part, characterized in that the support body (3,5) consists of a mixture of plastic and magnetic material.