The invention is based on a stator according to the definition of the species in Claim 1.
A stator that has a plastic coating was made known previously in EP 0 880 215 A2. The plastic coating is applied by means of injection molding and, simultaneously, receptacles can be formed as well that simplify the installation of a bearing or a connector.
The individual laminations of the stator must be joined into one laminated stack before injection molding, however. Furthermore, the laminations must be pressed together on the respective stator pole teeth during injection molding so that no gaps form between individual laminations into which the plastic can enter. Additionally, stator pole teeth are connected to each other in permeable fashion.
In contrast, the stator according to the invention having the characteristic features of claim 1 has the advantage that the manufacture of a stator is made easier in simple fashion, by way of which the stator of an electric motor can be assembled more easily, quickly, and favorably.
Advantageous further developments and improvements of the stator named in claim 1 are possible due to the measures listed in the dependent claims.
For the installation of the stacks of individual laminations on the core ring, it is advantageous that the core ring have a hook-shaped projection for each stack of individual laminations that at least partially encompasses the stack of individual laminations and forms a positive connection.
For the installation of the stacks of individual laminations on the core ring, it is advantageous that the core ring have a protuberance that can be guided [word missing] a groove of the stack of individual laminations, because the stack of individual laminations can then be attached in centered fashion.
It is advantageous to produce the plastic coating of the stator by means of injection molding.
For the installation of coils on the at least one lamination, it is advantageous that the lamination have projections extending radially outward, onto which the coils can be slid.
An advantageous embodiment of the invention is given by the fact that a coil form is integrally molded around the projections of the laminations, because this simplifies the installation of coils on the stator.
For the process of winding of a coil on the coil form, it is advantageous if the plastic coating have at least one winding support point that simplifies the gripping of the stator, and if a lowermost winding plane of the coil form only touches the coil form, because the coil form is then freely accessible for the winding process, and a winding head of a winding machine can encircle the coil form freely.
If the coil form or the plastic coating also has a receptacle, furthermore, an insulation displacement connection having a coil wire and external connections can be produced in advantageous fashion.
It is advantageous to design the projections of the lamination so that an external member can be slid onto the lamination and held by the projections by means of a non-positive connection or by means of a bayonet coupling.
The formation of a laminated stack out of individual laminations can furthermore be advantageous.
Exemplary embodiments of the invention are shown in the drawing in simplified form and described in greater detail in the following description.
The core ring 70 has at least one protuberance 74 between these two projections that extends in the direction of the centerline 3 on the outer surface of the core ring 70 and in which a groove 58 of the stack of individual laminations 16 catches.
The core ring forms a watertight inner channel 27 through which a medium, e.g., a liquid medium, can be directed.
One component produced in this fashion is a stator for a fluid pump, for example, wherein the projections 5 form stator pole teeth.
Lower electrical losses during the operation of a pump result due to the fact that the stator pole teeth are designed separate from each other and permeable.
A coil form 34 has been integrally molded around the projections 5, which form stator pole teeth. These can be produced in one working step using the application of the plastic coating 22. A coil 45 (
On the plastic coating 22 or, as in this exemplary embodiment, the coil form 34 has a winding support point 54 for better gripping of the lamination 18 during the winding procedure. In this example, the receptacle 38 serves as winding support point 54.
One end of a coil wire 48 of the winding 45 is located in the receptacle and squeezed in a slit 49, for example.
The external member 30 forms a magnetic return element or a part of the motor housing. The external member 30 can also be formed out of individual laminations.
Number | Date | Country | Kind |
---|---|---|---|
100 26 003 | May 2000 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCTDE01/01933 | 5/23/2001 | WO | 00 | 4/29/2002 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO0191266 | 11/29/2001 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
3827141 | Hallerback | Aug 1974 | A |
3914859 | Pierson | Oct 1975 | A |
4131988 | Finegold | Jan 1979 | A |
4689023 | Strong, III et al. | Aug 1987 | A |
5918360 | Forbes et al. | Jul 1999 | A |
6515396 | Fritzsche | Feb 2003 | B1 |
Number | Date | Country |
---|---|---|
39 05 997 | Aug 1990 | DE |
0 880 215 | Nov 1998 | EP |
0 952658 | Oct 1999 | EP |
966 156 | Aug 1964 | GB |
Number | Date | Country | |
---|---|---|---|
20020135259 A1 | Sep 2002 | US |