Abstract
The invention relates to a method for producing a stator, comprising the steps of: providing a stator, which comprises one or more windings and a winding head, the winding head comprising one or more cable ends; positioning a phase connection assembly by means of a retaining element on the winding head, the phase connection assembly comprising at least one cable element; connecting the at least one cable element to a corresponding cable end of the winding head; removing the retaining element.
Claims
1.-12. (canceled)
13. A method for producing a stator, comprising: providing a stator which comprises one or more windings and a winding head, wherein the winding head comprises one or more conductor ends; positioning, via a retention element, a phase connection sub-assembly on the winding head, wherein the phase connection sub-assembly comprises at least one conductor element; connecting the at least one conductor element to a corresponding conductor end of the winding head; removing the retention element.
14. The method according to claim 13, further comprising: removing the retention element from the winding head in a destruction-free manner.
15. The method according to claim 13, further comprising: at least partially deforming or shaping the retention element for removal from the winding head.
16. The method according to claim 13, further comprising: securing the at least one conductor element in or on the retention element in a positive-locking and/or non-positive-locking manner.
17. The method according to claim 13, wherein, when the at least one conductor element is connected to the corresponding conductor end, a connection location is formed, and further comprising: arranging and positioning or shaping the at least one conductor element and/or the conductor end such that the connection location faces away from the stator.
18. The method according to claim 13, further comprising: at least partially casting or coating the winding head after removal of the retention element.
19. A retention element for positioning a phase connection sub-assembly on a winding head of a stator comprising one or more windings and the winding head, wherein the winding head comprises one or more conductor ends, and wherein the phase connection sub-assembly comprises at least one conductor element, comprising: a carrier structure; a securing structure, wherein the retention element is constructed so as to be releasably secured to the winding head of the stator.
20. The retention element according to claim 19, wherein the carrier structure and the securing structure are arranged offset with respect to each other.
21. The retention element according to claim 20, wherein the securing structure comprises at least one positive-locking element which is configured for positive-locking and/or non-positive-locking securing of the retention element on the winding head and/or at least one conductor element on the retention element.
22. The retention element according to claim 21, wherein the carrier structure has at least one recess which is configured for introducing at least one conductor end of the winding head of the stator.
23. The retention element according to claim 22, wherein the at least one positive-locking element is provided in the region of the at least one recess.
24. The retention element according to claim 16, further comprising: at least one displaceable securing element.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0034] FIG. 1 is a side view of a stator prior to the arrangement of a phase connection sub-assembly.
[0035] FIG. 2 shows a stator known from FIG. 1, wherein a phase connection sub-assembly is arranged thereon via a retention element in an arrangement direction.
[0036] FIG. 3 shows the stator known from FIGS. 1 and 2, wherein the phase connection sub-assembly is retained on the stator by way of the retention element.
[0037] FIG. 4 shows the stator known from the previous Figures after the removal of the retention element.
[0038] FIG. 5 is a schematic view of a retention element when viewed in an arrangement direction.
[0039] FIG. 6 shows two detailed views of an embodiment of a retention element.
[0040] FIG. 7 shows a view of an embodiment of a retention element with displaceable securing elements.
DETAILED DESCRIPTION OF THE DRAWINGS
[0041] FIG. 1 is a very highly schematic side view of a stator 1 of an electrical machine or an electric motor, which has a winding 2, wherein a winding head 10 is formed. The reference numeral 12 denotes three conductor ends of the winding head or winding ends, wherein it is schematically illustrated that two conductor ends 12 form or are intended to form a neutral point 16 and one conductor end 12 constitutes a phase end 14. The number of the phase ends 14 is in particular dependent on the winding structure. The phase ends are connected to a connection of the electric motor, for example, a UVW connection, cf., for example, FIG. 2 and reference numeral 30 at that location. A rotor which is not illustrated in this instance is arranged within the stator 1, wherein the rotation axis thereof is designated R. The reference numeral A refers to an arrangement direction of a retention element, wherein reference is also made in this regard to FIG. 2.
[0042] FIG. 2 shows the stator 1 known from FIG. 1 and a schematically illustrated retention element 40, comprising a carrier structure 42 and a securing structure 44, wherein this is used inter alia for the arrangement of the retention element 40 on the winding head 10 and the arrangement of a phase connection sub-assembly 20 on the retention element 40, wherein this comprises a phase connection 24 and a switching bridge 26 in the drawing illustrated here. FIG. 2 shows that the retention element 40, comprising the phase connection sub-assembly 20, is arranged on the winding head 10 in the arrangement direction A.
[0043] FIG. 3 shows how the phase connection sub-assembly 20 is arranged via the retention element 40 on the stator or the winding head 10. The arrangement or securing is carried out in particular via the securing structure 44 of the retention element 40, cf. in this regard also the schematic illustration in FIG. 2. Advantageously, in a manner of speaking, the switching bridge 26 and the phase connection 24 are positioned with respect to the conductor ends 12 by means of the retention element 40, in particular in order to connect it, for example, in a subsequent operating step, for example, in a positive-locking manner.
[0044] FIG. 4 finally shows the phase connection sub-assembly 20, by way of example comprising the switching bridge 26 and the phase connection 24, which is secured directly and immediately and without the use or involvement of any auxiliary structures or the retention element 40 via connection locations 28 directly on the winding head 10. The winding head subsequently comprises only electrical conductors without auxiliary and/or retention or support structures, and can be optimally cast, coated or also left untreated. As a result of this construction type, optimum cooling is possible. For the removable retention element, disposable and reusable solutions are conceivable. Disposable solutions afford significant advantages with regard to the required logistics. Reusable solutions reduce the use of resources.
[0045] FIG. 5 is a schematic illustration of an embodiment of a retention element 40, when viewed in an arrangement direction A. In particular, a substantially circle-segment-like carrier structure 42 can be seen and has recesses 46. In a manner of speaking “below” the carrier structure, with respect to the drawing plane, there is provided a securing structure on which the electrical conductors of a phase connection sub-assembly are arranged. In the present schematic view these are two switching bridges 26 and three phase connections 24 for the phase U, V and W. Depending on the winding construction, there may, for example, also be six phase connections 24 which are connected in accordance with a (UVW) connection (not illustrated in this instance) of a phase connection sub-assembly.
[0046] FIG. 6 shows a cut-out of a retention element 40 in a similar perspective to FIG. 5 so that also in this instance, in particular, a plan view of a carrier structure 42 is provided. The carrier structure 42 has in this instance recesses 46, wherein web elements 50 are arranged within these recesses or in the region thereof and each have two slots 52 which increase the flexibility even further. The right half of the image shows a cross-section as illustrated in the left half of the image. Here in particular, the formation of the web element 50 can be seen and forms two arrangement regions or positive-locking elements 48, which the arrangement of the electrical conductors. The dual-layer structure is also clear in this instance, comprising a securing structure 44 and the carrier structure 42. Advantageously, the entire securing structure 44 is movable or constructed in a resilient manner to some degree, which is particularly also enabled by the slots 42. For better securing of the conductor elements which are not illustrated in this instance, the positive-locking elements 48 have in this instance smaller projections or protrusions which enable an additional positive-locking connection to the, for example, substantially rectangular conductors. The positive-locking connection elements 48 thus enable an arrangement or securing of the retention element 40 on the winding head or the conductor elements of the phase connection sub-assembly on the retention element.
[0047] FIG. 7 shows an embodiment of a retention element 40 with three movable or displaceable securing elements 54, in particular, therefore, a reusable solution of a retention element. The movability thereof is indicated by the double-headed arrows. The securing elements 54 can particularly be displaced parallel with a carrier structure 42 of the retention element 40 and can also be introduced virtually laterally into a winding head (not illustrated in this instance), wherein they bring about a releasable securing counter to an arrangement direction A.
LIST OF REFERENCE NUMERALS
[0048] 1 Stator [0049] 2 Winding [0050] 10 Winding head [0051] 12 Conductor end [0052] 14 Phase end [0053] 16 Neutral point [0054] 20 Phase connection sub-assembly [0055] 22 Conductor element [0056] 24 Phase connection [0057] 26 Switching bridge [0058] 28 Connection location [0059] 30 (UVW) connection [0060] 40 Retention element [0061] 42 Carrier structure [0062] 44 Securing structure [0063] 46 Recess [0064] 48 Positive-locking element [0065] 50 Web element [0066] 52 Slot [0067] 54 Securing element [0068] A Arrangement direction [0069] R Rotation axis
