CN110611389A

CN110611389A - Electronic reversing motor

Info

Publication number: CN110611389A
Application number: CN201910510786.4A
Authority: CN
Inventors: S.科勒; J-M.里特; A.约汉宁; D.苏亚雷斯-塞米纳里奥; C.佐尔夫; A.诺伊鲍尔
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2018-06-14
Filing date: 2019-06-13
Publication date: 2019-12-24
Also published as: DE102018209493A1

Abstract

For an electronically commutated electric machine with a rotor having an associated rotor shaft (182) and a stator (150) having a plurality (215) of stator segments (216, 217, 218) arranged in a ring shape, wherein each stator segment (216) 218 is provided with an associated single winding (299) having two lead ends (231) and 254 respectively, and wherein the lead ends (231) and 254) of the associated single winding (299) are interconnected to the motor winding via an interconnection means (280) on an axial end (201) of the stator (150), the interconnection means (280) for interconnecting the lead ends (231 and 254) to the motor winding (157) having at least two interconnection elements (281 and 286) in the shape of ring segments which are arranged at an inner diameter (D) of the stator (150)_I) And outer diameter (D)_A) And for the electrical contact of the wire ends (231-A contact element (292), wherein the contact element (292) is configured to receive the respective wire end (231) and 254 in a radial direction (204) of the stator (150).

Description

Electronic reversing motor

Technical Field

The invention relates to an electronically commutated electric machine having a rotor with an associated rotor shaft and a stator with a plurality of stator segments arranged in a ring shape, wherein each stator segment is provided with an associated single winding with two respective wire ends, and wherein the wire ends of the associated single winding are interconnected via an interconnection means to the machine windings on the axial ends of the stator.

Background

Such an electronically commutated electric machine with a rotor and a stator is known from the prior art. The stator is configured as a segmented stator and has a plurality of annularly arranged stator segments. For the purpose of forming a stator in the form of a ring, the stator segments are connected to one another in the circumferential direction of the stator in the holding device or directly in the stator housing via a respective tongue and groove connection (Nut/Federverbindunng). Each stator segment is provided with an associated single winding, wherein all single windings are interconnected via interconnection means into a motor winding.

Disclosure of Invention

The invention provides an electronically commutated electric machine with a rotor having an associated rotor shaft and a stator having a plurality of annularly arranged stator segments. Each stator segment is provided with an associated single winding with two respective wire ends. The wire ends of the associated single winding are interconnected into the motor windings on the axial ends of the stator via interconnection means. The interconnection device has at least two interconnection elements in the form of ring segments for interconnecting the conductor ends to form a motor winding, which are arranged between the inner and outer diameters of the stator and have contact elements in the form of axial extensions for the electrical contacting of the conductor ends. The contact elements are configured to receive the respective wire ends in a radial direction of the stator.

The invention thus makes it possible to provide an electronically commutated electric machine in which simple and uncomplicated contacting of the respective conductor ends with the machine winding is possible by means of an interconnection element arranged between the inner and outer diameter of the stator with contact elements configured as axial extensions. Rapid assembly of the electronically commutated motor according to the present invention is thus made possible.

The at least two interconnecting elements preferably have at least partly a first diameter and/or a second diameter, wherein the second diameter is smaller than the first diameter. A space-saving arrangement of the interconnection elements and thus a relatively low axial installation space requirement can thus be made possible.

Preferably, the at least two interconnecting elements are arranged such that the contact elements are arranged equidistantly on a common diameter with respect to the rotor shaft. Simple and uncomplicated fixing of the individual contact elements, preferably by laser welding, is thus made possible.

The at least one first interconnecting element preferably has a first diameter and the at least one second interconnecting element has a second diameter, wherein the second diameter is smaller than the first diameter, and wherein the common diameter is smaller than the first diameter and larger than the second diameter. The common diameter for the contacting of the individual wire ends can thus be adapted in a simple manner.

According to one embodiment, the contact element of the at least one first interconnection element is arranged on an inner circumference of the at least one first interconnection element and the contact element of the at least one second interconnection element is arranged on an outer circumference of the at least one second interconnection element. The arrangement of the contact elements between the inner and outer diameter of the stator can thus be made possible simply and without complications, wherein a relatively compact arrangement of the interconnection elements can be made possible.

Preferably, the contact element is configured as a welding fork, which for receiving the wire ends in the radial direction of the stator has two legs, which together form a receptacle, wherein the respective wire end can be arranged in the receptacle. Stable and reliable contacting of the wire ends is thus made possible.

The contact elements are preferably arranged on the respective interconnection element perpendicularly to the respective interconnection element. Simple and uncomplicated contacting is thus made possible.

The interconnection device is preferably assigned a holding element which is designed to fasten the interconnection device to an axial end of the stator. A reliable and robust arrangement of the interconnection means on the stator may thus be made possible.

According to one embodiment, at least two interconnection elements are arranged on the bottom side facing the electric machine and/or on the opposite top side of the holding element. An arrangement which saves installation space can thus be provided.

Preferably, the at least one interconnection element is arranged on the bottom side and the at least one interconnection element is arranged on the top side of the holding element, wherein the at least one interconnection element arranged on the bottom side has a connection pin for connection with the at least one interconnection element arranged on the top side, and wherein the at least one interconnection element arranged on the top side has a receptacle for receiving the connection pin. The connection of at least two interconnection elements to a motor topology and/or interconnection that can be individually adapted is thus made possible in a simple manner.

At least two interconnecting elements preferably each have a coupling element which is connected to an external counter-coupling element, wherein the coupling element has a pin which can be arranged in a connection receptacle assigned to the interconnecting element for connection to the respective interconnecting element. A simple and uncomplicated connection of the interconnection device to an external coupling element can thus be made possible.

According to one embodiment, the pin is assigned to an additional element, wherein the additional element is preferably connected to the plug contact of the coupling element via a copper strand (kupferlize). An alternative connection of the pin to the coupling element can thus be made possible, wherein the additional element with the copper strands can be designed as a pre-assembled component and thus a simple and rapid assembly can be made possible.

Preferably, the coupling elements assigned to the at least two interconnection elements are arranged in a common plug body which is formed in one piece with the retaining element. The provision of a compact coupling element can thus be made possible, whereby an axial free displaceability of the plug contact in the plug-in body can be made possible and thus a user-specific mating can be achieved.

Preferably, the connecting pin is fastened in the receptacle and/or the pin is fastened in the connecting receptacle by laser welding. A safe and reliable connection can thus be constructed.

The at least two interconnection elements preferably have copper guides (Kupferleitbahn) for interconnecting the wire ends. Suitable interconnection elements can thus be provided in a simple manner in order to make a desired motor topology and/or interconnection possible.

Preferably, the at least two interconnection elements have at least one plane on which the copper guide is arranged. Any desired motor topology and/or interconnections can be made possible in a relatively small installation space.

According to one embodiment, the at least two interconnection elements are each configured as a stamping. Simple and cost-effective production of the interconnection element is thus possible, in which relatively few bending processes are necessary and thus reduced material consumption can be achieved.

Preferably, the wire ends of the single winding are fixed via a laser welded connection on the contact elements of the respective interconnection element. This makes it possible to achieve an advantageous and reliable connection, in which additional or subsequent tin and/or silver plating can be dispensed with.

Drawings

The invention is further explained in the following description by means of embodiments shown in the drawings. Wherein:

figure 1 shows a schematic view of an electronically commutated electric machine with a rotor and a stator,

figure 2 shows a perspective view of the stator of figure 1 with an interconnection means,

figure 3 shows a top view of the interconnect device towards figure 2,

figure 4 shows a longitudinal section through the interconnect of figures 2 and 3,

figure 5 shows a schematic view in longitudinal section through the interconnect of figure 4,

figure 6 shows a perspective view of a stator with the interconnection arrangement of figures 1 to 5 with a cut-out (Ausschnitt),

figure 7 shows an enlarged view of the cut-out of figure 6,

figure 8 shows a perspective view of two interconnection elements assigned to the interconnection means before assembly,

figure 9 shows a perspective view of the two interconnection elements of figure 8 after assembly,

figure 10 shows a perspective view of the stator of figures 1, 2 and 6 with a cut-out with an alternative interconnection device with a holding element and an interconnection element according to another embodiment,

figure 11 shows a perspective view of a retaining element with the interconnection element of figure 10,

figure 12 shows an enlarged view of the cut-out of figure 10,

FIG. 13 shows a perspective view of a connection unit connecting the interconnection element with the coupling element, and

fig. 14 shows a perspective top view of the connection unit towards fig. 13.

Detailed Description

FIG. 1 shows an exemplary configured internal rotor electric motor 100 with an internal rotor 180 having a rotor shaft 182 and with a segmented outer stator 150. Outer stator 150 illustratively has a segmented stator core 153 at least partially provided with a plastic encasement 155, preferably constructed as a plurality of insulators, on which stator windings 157 are arranged. The segmented outer stator 150 is referred to below for simplicity of description as "stator 150" only. Preferably, the invention contemplates stators with an outer diameter of less than 70mm, but may equally be used in the context of any other outer diameter.

As will be pointed out below, the electric motor 100 is only schematically illustrated in fig. 1, since the structure and functionality of suitable electric motors are sufficiently known from the prior art, so that a detailed description of the electric motor 100 is omitted here for the sake of brevity and simplicity of description. It is further noted that motor 100 is shown as an inner rotor motor by way of example only and not by way of limitation. It should furthermore be pointed out that likewise the image of the outer stator has only exemplary features and that the invention can likewise be used, for example, in the case of an annular inner stator.

Fig. 2 shows the stator 150 of fig. 1 configured as a segmented outer stator. The stator 150 has a first axial end 201 and an opposite second axial end 202 defining an axial direction 203 of the stator 150. Furthermore, the stator 150 has a radial direction 204 oriented perpendicular to the axial direction 203. According to one embodiment, the stator 150 is constructed from a plurality 215 of at least substantially identical stator segments 216 and 218 (illustratively twelve stator segments 216 and 218) preferably arranged in a ring, wherein only three stator segments 216 and 218 are numbered. The stator segments 216 and 218 are preferably designed such that they can be joined together in a ring-shaped manner, wherein the stator segments 216 and 218 which are respectively adjacent in the circumferential direction of the stator 150 are preferably connected to one another in a form-fitting manner or are fixed to one another via a suitable tongue-and-groove connection. It should be noted, however, that the illustration of twelve stator segments 216-218 is merely an exemplary feature and is not to be construed as a limitation of the present invention, which may be utilized in the context of any number of stator segments.

The stator segments 216 and 218 preferably have associated stator segment cores 298, which are correspondingly provided with insulators 210. On the respectively associated insulator 210, a single winding 299 is arranged which is assigned to the stator segment 216 and 218. The plurality of single windings 299 are preferably configured to be interconnected into the motor windings 157. These single windings 299 are preferably electrically insulated with respect to the respective stator segment core 298 by the plastic encapsulation 155 of fig. 1 or by a respectively associated insulator 210, preferably with plastic. However, the insulator 210 may equally have any other suitable electrically insulating material.

According to one embodiment, all the single windings 299 are interconnected on the axial ends 210 of the stator 150 via an interconnection 280 into the motor windings 157. Preferably, the interconnection means 280 has at least two interconnection elements 281 and 286 in the shape of ring segments. Illustratively, six interconnection elements 281-286 are preferably provided, which interconnect the wire ends 231-254 assigned to the single winding 299 to the motor winding 157. The individual windings 299 are preferably at least approximately all of the same length or are at least approximately identically formed within predetermined manufacturing tolerances. Furthermore, the single windings 299 may be separated from each other by plastic walls.

At least two and illustratively six ring-segment-shaped interconnecting elements 281-286 are arranged according to the invention at the inner diameter D of the stator 150_IAnd outer diameter D_AIn the meantime. Preferably, the interconnecting elements 281 and 286 are arranged here between the stator tooth inner region and the stator tooth outer region. The interconnection element 281, 286 preferably has at least one contact element 292 in the form of an axial expansion 287 for the electrical contacting of the wire ends 231, 254. For clarity and simplicity of the drawing, only one contact element 292 is numbered. Preferably, the contact elements 292 are configured for receiving the respective wire ends 231 and 254 in the radial direction 204 of the stator 150.

The contact elements 292 are preferably designed as welding prongs which are arranged in the radial direction 204 of the stator 150 in order to accommodate the wire ends 231 and 254. The contact element 292 in the form of a solder fork preferably has two legs 222, 223, respectively, which are jointly formed as a receptacle 224, wherein the respective wire end 231 and 254 can be arranged in the receptacle 224. The recess 224 is, for example, assigned an undercut, wherein the wire end 251 and 256 can be arranged in the undercut accordingly. Preferably, the contact elements 292 are arranged on the respective interconnection elements 281-. For contacting, the wire ends 231-. Here, the solder forks can also be designed in the form of intersecting clamping elements (Schneid-Klemm-elements), which strip off the respective wire ends 231 and 254 when arranged in the receptacle 224.

The interconnecting elements 281 and 283 are preferably constructed as stampings. Preferably, the interconnecting elements 281 and 283 are configured here as sheet metal stampings. Here, the interconnection elements 281-283 are preferably made of copper with an optional coating. Preferably, interconnect element 281-283 is made of a copper alloy, in particular cusn0.15. Optionally, the surfaces of the interconnection elements 281 and 283 may be tinned here. Furthermore, the wire ends 231 and 254 of the single winding 299 are preferably fixed on the respective contact element 292 via a contactless contact, preferably via a laser welding connection. Preferably, the laser welding is performed in the axial direction 203 of the stator 150, wherein the laser beam is preferably emitted from the first axial end 201 onto the respective contact element 292. Laser welding provides an advantageous connection in that additional/subsequent tin and/or silver plating can be dispensed with, since no coated interconnecting elements are required for laser welding. Furthermore, laser welding requires less processing time than resistance welding.

Furthermore, a holding element 270 is preferably assigned to the interconnection 280, which holding element is fastened on the first axial end 201 of the stator 150. Retaining element 270 is preferably configured to secure interconnect 280 to axial end 201 of stator 150. Preferably, the holding element 270 has a base body 271, which is preferably arranged on the first end 201 of the stator 150. Preferably, the holding element 270 is designed as an injection-molded part, in particular as an injection-molded plate.

According to one embodiment, the interconnecting elements 281 and 286 are arranged on the oppositely situated top surface 275 facing the bottom surface 276 and/or the holding element 270 of the electric machine 100. The interconnection elements (412, 413 in fig. 4) arranged on the bottom surface 276 may have a connection section 261 for connecting with the interconnection elements 281 and 286 arranged on the top surface 275. The connecting section 261 projects from the base surface 276 in the direction of the axial end 201 into a recess 263 of the holding element 270, which recess is designed as a through-piece. Preferably, the interconnecting element 285 arranged on the top surface 275 also has the connecting section 262. Illustratively, the two connecting sections 261, 262 are configured in the axial direction 203. The two connecting sections 261, 262 are preferably arranged next to one another, particularly preferably parallel to one another. Preferably, the two connecting sections 261, 262 are connected to one another via a welded connection 260, in particular by laser welding.

On the bottom surface 276 and/or the top surface 275, a plurality of interconnecting elements 281 and 286 can likewise be arranged one above the other in the axial direction 203 of the stator 150. Furthermore, the interconnection elements 281 and 286 preferably have copper guides for the interconnection of the wire ends 231 and 254. The interconnection elements 281 and 286 preferably have at least one plane on which the copper guide is arranged. The desired motor topology and/or form of interconnection can thus be made possible simply and easily.

Furthermore, the interconnecting element 281-286 preferably has a coupling element 265, 266, 267, respectively, which can be connected with an external counter-coupling element. Here, the coupling elements 265, 266, 267 are preferably arranged perpendicularly or in the axial direction 203 of the stator 150. As will be pointed out below, the illustrated vertical arrangement of the coupling elements 265-267 is of exemplary character only and is not to be construed as limiting the invention. Therefore, the coupling elements 265 and 267 can likewise be arranged in any other direction, for example in the radial direction 204 of the stator 150.

The retaining element 270 preferably has, for receiving the coupling element 265 and 267, receiving elements 272, 273, 274, in which the coupling elements 265, 266, 267 are received. For this purpose, the receiving element 272 and 274 preferably have a receiving portion 212. The receiving element 272 and 274 are preferably formed integrally with the retaining element 270, but can also be arranged there via a releasable connection. Three coupling elements 265, 266, 267 are shown diagrammatically, which are each designed as a motor phase of the motor circuit. Here, the individual interconnection elements 281-286 are interconnected with each other according to the desired interconnection.

The interconnecting elements 281 and 286 are preferably positionally fixed at the retaining element 270 via fixing elements 294. The fastening element 294 is preferably designed as a rivet, in particular as a hot rivet. The fastening element 294 is preferably fastened to the base body 271 in a heat press. For fastening to the fastening element 294, the interconnecting elements 281 and 286 preferably have eyelets 295. Preferably, the eye 295 is arranged centrally along the longitudinal extension of the interconnecting elements 281-286. For clarity of the drawing, only the eyelet 295 and the fixing element 294 are numbered correspondingly in fig. 2.

Fig. 3 shows the stator 150 with the interconnect 280 of fig. 2. Fig. 3 shows an exemplary arrangement of the interconnecting elements 281 and 286, in which the interconnecting elements are arranged such that the contact elements 292 are arranged at least substantially equidistant from the rotor shaft 182 on the common diameter D2. Here, preferably at least one, illustratively three first interconnecting elements 281, 282, 283 have a first diameter D3 and preferably at least one, illustratively three second interconnecting elements 284, 285, 286 have a second diameter D1. Preferably, the second diameter D1 is less than the first diameter D3 and the common diameter D2 is preferably less than the first diameter D3 and greater than the second diameter D1. Preferably, the contact elements 331, 334, 335, 338, 339, 342 of the first interconnecting element 281-.

Illustratively and by way of example, each of the interconnect elements 281-286 preferably has two contact elements 331-342. Here, the interconnection element 281 has contact elements 331, 334 on its inner circumference 351, illustratively, for receiving the wire ends 231, 238. The interconnection element 282 illustratively has contact elements 335, 338 on its inner periphery 351 for receiving the wire ends 239, 246. Further, the interconnect element 283 illustratively has contact elements 339, 342 on its inner peripheral edge 351 for receiving the wire ends 247, 254. Preferably, the interconnection element 284 illustratively has contact elements 332, 333 on its outer periphery 352 for receiving the wire ends 234, 237. The interconnection element 285 illustratively has contact elements 336, 337 on its outer periphery 352 for receiving the wire ends 242, 245. Furthermore, the interconnection element 286 illustratively has contact elements 340, 341 on its outer periphery 352 for receiving the wire ends 250, 253.

Furthermore, the interconnection means 280 is assigned an interconnection element (411-413 in fig. 4) which is arranged on the bottom surface 276 of the holding element 270. Here, the interconnection element (411 in fig. 4) is assigned, for example, a contact element 312, 315, 317, 322, which is designed to receive a conductor end 283, 240, 243, 252. The interconnection element (412 in fig. 4) is assigned a contact element 311, 313, 318, 320 which is designed to receive a conductor end 232, 235, 244, 249. Preferably, the interconnection element (413 in fig. 4) is assigned a contact element 314, 316, 319, 321 which is configured for accommodating the wire end 236, 241, 248, 251.

Fig. 4 shows the holding element 270 with its base body 271 of fig. 2 and shows the arrangement of the interconnection elements 281, 284 on the top surface 275 of the base body 271 and the arrangement of the interconnection elements 411, 412, 413 on the bottom surface 276 of the base body 271. As will be pointed out below, the interconnection elements can likewise be arranged only on the top 275 or bottom 276, respectively. The base 271 for the gripping (Durchgriff) contact elements 311, 312, 313, 314 preferably has a recess in each case.

Fig. 5 shows an alternative holding element 270 with a base body 271 of fig. 2, which at its top surface 275 illustratively has a first interconnecting element 513 with a first diameter D3 and a second interconnecting element 511 with a second diameter D1. Furthermore, the base body 271 has recesses 519, 520 at its bottom surface 276 for receiving the interconnection elements 512, 514. Preferably, the interconnecting member 512 disposed in the pocket 519 has a second diameter D1, and the interconnecting member 514 disposed in the pocket 520 has a first diameter D3. As will be noted below, the interconnecting members 512, 514 may likewise have any other diameter.

Fig. 6 shows the stator 150 of fig. 2 and 3 with a cut-out 610. Here, the cutout 610 shows an exemplary connection 620 of the interconnection element 286 to the coupling element 265 and a connection 625 of the interconnection element 286 to the interconnection element 412 arranged on the bottom face 275. Here, the connections 620, 625 exemplarily represent the connection of the interconnection elements with the respective coupling elements 265, 267 and the connection between the interconnection elements on the top and bottom side of the holding element 270.

Fig. 7 shows the cut-out 610 of fig. 6 and shows an exemplary connection 620 between the interconnecting member 286 and the coupling member 265. Further, fig. 6 shows exemplary connections 625 between the interconnect elements 286, 412 on the top and bottom surfaces.

The at least one interconnection element 412 arranged on the bottom surface 276 preferably has a connection pin 721 for connecting with the at least one interconnection element 286 arranged on the top surface 275. For this purpose, at least one interconnecting element 286 arranged on the top surface 275 preferably has a receiving portion 716 for receiving a connecting pin 721. Here, the connecting pin 721 is preferably fastened in the receptacle 716 by laser welding. Preferably, the connection pin 721 and the receiving portion 716 are configured to be connected 625. As will be noted below, the connection 625 may likewise connect multiple interconnection elements to one another in accordance with a desired motor topology and/or manner of interconnection.

Furthermore, the interconnection element 286 preferably has a coupling element 265 for connection with an external counter-coupling element, as described above. According to the illustrated embodiment, the coupling element 265 has a pin 712, which for the purpose of forming a connection 620 or connecting to a corresponding interconnecting element 286 can be arranged in a connection receptacle 715 assigned to the interconnecting element 286. Here, the pin 712 is preferably fastened in the connection receptacle 715 by laser welding. The pin 712 is preferably connected to the coupling element 265 via a connecting section 711 or arranged integrally on the coupling element.

Preferably, the pin 712 and/or the connecting pin 721 are connected in one piece with the coupling element 265 or the interconnecting element 286 and are molded, in particular, by stamping. As will be pointed out below, the coupling element 265 can likewise be constructed in one piece with the interconnecting element 286. It is further noted that interconnect 280 may have connections 620 and/or 625, as described below.

Fig. 8 shows an interconnecting element 412 with a pin 712 and an interconnecting element 286 with a connection receiver 715 for constructing the connection 625 of fig. 7. As will be pointed out below, the interconnecting element 412 and the pins 712 for forming the connection 625 are likewise representative for the design of the connection 620 between the interconnecting element 412 and the coupling element 265 of fig. 7. Here, the pin 721 and the connection receptacle 715 illustratively have a rectangular shape, wherein both connection partners have the same cross section. However, the pin 721 and the connection receiver 715 may likewise have any other shape, for example an oval shape. In addition, the pin 712 may have embossments, edge rounding, and/or lead-in chamfers.

Fig. 9 shows the interconnection element 412 with the pin 712 and the interconnection element 286 with the connection receptacles 715 of fig. 7 and 8 after the pin 712 is arranged in the connection receptacles 715. Here, the pin 712 and the connection receptacle 715 are configured such that the pin 712 can be arranged in the connection receptacle 715 without being able to wear out or with play. Preferably, the pin 712 protrudes in the direction of the first end 201 before the laser welding process in the case of being arranged in the connection receptacle 715. The pin 712 preferably protrudes here from the connection receptacle 715 by 0 to 1.0 mm. After the laser welding process, a melting zone for mechanical and electrical connection is formed on the end of the exemplary interconnect element 286 facing the first end 201.

Fig. 10 shows the stator 150 of fig. 2, 3 and 6 with an interconnection 910 to which at least two, illustratively three interconnection elements 957, 962, 963 are assigned according to another embodiment. Here, the interconnecting elements 957, 962, 963 preferably have a first diameter D3 in part and a second diameter D1 in part. Preferably, the interconnecting elements 957, 962, 963 are arranged at an inner diameter D of the stator 150 or of the holding element 270_IAnd outer diameter D_A2In the meantime. Here, the outer diameter D_A2Defined by a sunken accommodation area 997 having a reduced height. Here, the interconnecting elements 957, 962, 963 have a section 958 with a first diameter D3 and a section 959 with a second diameter D1, respectively. Between the sections 958 and 959, a transition section 960 is formed, which connects the two sections 958, 959 to one another.

Preferably, the sections 958, 959 have two contact elements 945-. However, it should be noted that the segments 958, 959 may likewise have more or less than two contact elements, as described below. Here, the number of contact elements per segment and/or per interconnecting element may also vary. Furthermore, the interconnection elements 957, 962, 963 can be arranged in receptacles formed in the holding element 270 for a secure arrangement.

Illustratively and by way of example, the interconnection element 957 has contact elements 945, 947 on its section 958 for receiving the wire ends 931, 933 and contact elements 950, 952 on its section 959 for receiving the wire ends 936, 938 are arranged. Furthermore, interconnection element 962 has contact elements 949, 951 on its section 958 for receiving wire ends 935, 937 and has contact elements 954, 956 arranged on its section 959 for receiving wire ends 940, 942. Furthermore, the interconnection element 963 has contact elements 953, 955 for receiving the wire ends 939, 941 on its section 958 and contact elements 946, 948 for receiving the wire ends 932, 934 are arranged on its section 959. Here, the contact elements 945-.

Preferably, a preferably radial expansion element 965, 966, 967 is assigned to the interconnection element 957, 962, 963, respectively, which expansion element has a receptacle 970 for arranging the pin 969, respectively. Illustratively, the expansion elements 965, 966, 967 are configured radially outward, but may likewise be configured radially inward.

Furthermore, the base body 271 of the holding element 270 preferably has a plug body 920 for arranging the coupling elements assigned to the respective interconnection elements 957, 962, 963. Preferably, the plug body 920 has a cylindrical base 921 with preferably three receiving areas 922, 923, 924 for arranging mating coupling portions of corresponding coupling elements. However, it should be noted that the plug body 920 can likewise have less than three receiving regions or more than three receiving regions, as follows. Preferably, the plug body 920 is connected in one piece to the holding element 270 or the base body 271. In this case, the plug body 920 is preferably arranged in the receiving region 997.

In addition, FIG. 10 shows a cutout 990 further depicted in FIG. 12.

Fig. 11 shows the holding element 270 with the interconnect device 910 of fig. 10 and here shows a receiving area 997 for receiving the holding element 270 of the interconnect device 910. Preferably, the inner diameter D_IAssociated with the peripheral web 999, a section 959 with a second diameter D1 preferably abuts. In addition, fig. 11 shows expansion elements 965, 966, 967, which are preferably L-shaped. Preferably, the section 9 is arranged radially inwardly in the illustrationThe expansion element 965 at 59 preferably extends beyond the corresponding illustrated radially outer section 958 of the interconnection element 962.

Fig. 12 shows the cut-out 990 of fig. 10, showing the arrangement of the wire ends 936-939 in the contact elements 950-953. Here, fig. 12 shows a contact element 950-953 which is preferably configured in the axial direction 203 at a top face of the respective interconnection element 957, 962, 963 facing the first axial end 201.

According to the embodiment shown in fig. 10 to 12, the contact elements 950 and 953 are arranged directly at the respective interconnection element 957, 962, 963 and here have the same diameter as the respective section 958, 959. Furthermore, the contact elements 950 and 953 may likewise be arranged offset in the radial direction 204 with respect to the respective interconnection element, as in the embodiment of fig. 2 to 4, for example, wherein the respective sections 958, 959 nevertheless have a common diameter. Furthermore, the contact elements 950 and 953 of the sections 958, 959 may likewise have a common diameter, as in the embodiments of fig. 2-4.

Fig. 13 shows an exemplary connection unit 1030 for connecting a respective interconnecting member 957, 962, 963 with a coupling member 265 or 1025. Illustratively, the connection unit 1030 at the interconnection element 957 is representatively shown for the interconnection elements 957, 962, 963.

An additional element 1011 is preferably provided, to which a pin 712 or 969 is assigned. As described above, the pin 969 may be disposed in the receiving portion 970 of the expansion element 965. Here, the pin 969 and the receiving portion 970 are preferably connected to each other by laser welding. Preferably, the additional element 1011 is arranged at the bottom surface 276 of the holding element 270 and it projects through the recess. Furthermore, the attachment element 1011 preferably has a fastening geometry 1022 which is designed to fasten the attachment element 1011 in the recess of the retaining element 270.

The additional element 1011 preferably has a connection surface 1021 for connection to an electrical connection element, for example a copper strand 1012. The copper strand 1012 is preferably welded with its first connecting section 1013, preferably by resistance welding, to the connecting surface 1021 of the additional element 1011. The copper strands 1012 preferably connect the additional elements 1011 to the coupling elements 1025. The coupling element 1025 likewise preferably has a connecting surface 1021 for welding the copper strand 1012, similar to the additional element 1011, the copper strand 1012 being welded with its second connecting section 1014 to the connecting surface 1021 of the coupling element 1025.

Preferably, the coupling element 1025 has a preferably rectangular base 1020 which is designed to be arranged in the receiving region 922, 923, 924 of the plug body 920. Thus, the pins 969 or the additional elements 1011 are connected with the plug contacts 1020 of the coupling element 1025 via the copper strands 1012. In this case, preferably three coupling elements 1025 are arranged in a common plug 920, which is formed in one piece with the holding element 270.

Fig. 14 shows the connection unit 1030 of fig. 12, and shows the connection surface 1021 of the additional element 1011 and of the coupling element 1020 with the connection sections 1013, 1014 of the exemplary copper strand 1012. Furthermore, fig. 14 shows an exemplary fastening geometry 1022 of the additional element 1011.

As will be pointed out below, the copper strands 1012 are preferably connected to the attachment element 1011 and the coupling element 1020 by resistance welding. The connection between the additional element 1011 and the coupling element 1020 can thus be assembled by the copper strand 1011 as a pre-assembly. Simple mounting is thus ensured, since the accessibility of the welding points is simple and uncomplicated.

Simultaneously or subsequently, the interconnect 280 or 910 may be assembled. Subsequently, the pre-assembled components are connected with the interconnection 910 or with the individual interconnection elements 957, 962, 963 and fastened by laser welding. Here, the wire ends 931-942 are preferably at the contact elements 950-953 and the additional element 1011 and the contact elements 950-953 are preferably connected by laser welding. Preferably, the laser welding of the wire ends 931-942 at the contact elements 950-953 and of the accessory element 1011 at the contact elements 950-953 is effected in a common laser welding process. Thus enabling moderate (neutral) beat times.

In the case of laser welding, the respective contact partners are heated by melting in such a way that the splice gap between the two contact partners is filled. Preferably, the contact elements 950 and 953 and the additional element 1011 are arranged such that the contact is achieved perpendicular to the rotor shaft 182 by laser welding. Optionally, a cover (Versiegelung) for electronically commutated motor 100 may be implemented. In this case, the entire stator 150 can preferably be sheathed or "overmolded" (ummolden) in order to protect the electric machine 100, for example, in wet rotor applications and/or in applications with thermal and/or mechanical stresses.

Claims

1. Electronically commutated electric machine (100) having a rotor (180) with an associated rotor shaft (182) and a stator (150) with a plurality (215) of annularly arranged stator segments (216, 217, 218), wherein each stator segment (216-, and wherein the wire ends (231-, characterized in that the interconnecting means (280) for interconnecting the wire ends (231) and 254) into the motor winding (157) have at least two interconnecting elements (281 and 286) in the shape of ring segments, which are arranged at the inner diameter (D) of the stator (150)._I) And outer diameter (D)_A、D_A2) And for electrical contacting of the wire ends (231-.

2. An electronically commutated motor according to claim 1, wherein the at least two interconnection elements (957, 962, 963) have, at least in part, a first diameter (D3) and/or a second diameter (D1), wherein the second diameter (D1) is smaller than the first diameter (D3).

3. Electronically commutated motor according to claim 1 or 2, wherein the at least two interconnection elements (281, 286) are arranged such that the contact elements (292) are arranged equidistantly on a common diameter (D2) with respect to the rotor shaft (182).

4. Electronically commutated electric machine according to any of the preceding claims, wherein at least one first interconnection element (281, 283) has a first diameter (D3) and at least one second interconnection element (284, 286) has a second diameter (D1), wherein the second diameter (D1) is smaller than the first diameter (D3), and wherein the common diameter (D2) is smaller than the first diameter (D3) and larger than the second diameter (D1).

5. An electronically commutated motor according to claim 4, wherein the contact elements (331, 334, 335, 338, 339, 342) of the at least one first interconnection element (281-283) are arranged on the inner circumference (351) of the at least one first interconnection element (281-283) and the contact elements (332, 333, 336, 337, 340, 341) of the at least one second interconnection element (284-286) are arranged on the outer circumference (352) of the at least one second interconnection element (284-286).

6. Electronically commutated electric motor according to any of the preceding claims, wherein the contact element (292) is configured as a welding fork which, for receiving a conductor end (231) and 254 in the radial direction (203) of the stator (150), has in each case two legs (222, 223), which together form a receiving portion (224), wherein the respective conductor end (231 and 254) can be arranged in the receiving portion (224).

7. Electronically commutated electric motor according to claim 6, wherein the contact elements (292) are arranged on the respective interconnection elements (281-283) perpendicular to the respective interconnection elements (281-283).

8. Electronically commutated motor according to any preceding claim, wherein a retaining element (270) is assigned to the interconnection device (280), which retaining element is configured for fastening the interconnection device (280) on an axial end (201) of the stator (150).

9. Electronically commutated motor according to claim 8, wherein the at least two interconnection elements (281-286;411-413;511-514) are arranged on a bottom side (276) facing the motor (100) and/or on an oppositely disposed top side (275) of the retaining element (270).

10. An electronically commutated electric motor according to claim 9, wherein at least one interconnection element (412) is arranged on a bottom surface (276) and at least one interconnection element (286) is arranged on a top surface (275) of the retaining element (270), wherein the at least one interconnection element (412) arranged on the bottom surface (276) has a connection pin (721) for connection with the at least one interconnection element (286) arranged on the top surface (275), and wherein the at least one interconnection element (286) arranged on the top surface (275) has a receptacle (716) for receiving the connection pin (721).

11. Electronically commutated electric machine according to any one of the preceding claims, wherein the at least two interconnection elements (281, 286) each have a coupling element (265, 266, 267) which is connected with an external counter-coupling element, wherein the coupling elements (265, 267) have pins (712) which can be arranged in connection receptacles (715) assigned to the interconnection elements (286) for connection with the respective interconnection elements (286).

12. An electronically commutated electric motor according to claim 11, wherein the pin (712;969) is assigned to an additional element (1011), wherein the additional element (1011) is connected to the plug contact (1020) of the coupling element (265, 1025) via a copper strand (1012).

13. Electronically commutated motor according to claim 11 or 12, wherein the coupling elements (1025) assigned to the at least two interconnection elements (931-942) are arranged in a common plug body (920) which is constructed integrally with the retaining element (270).

14. An electronically commutated motor according to any of claims 10 to 13, wherein the connection pin (721) is fastened in the receptacle (716) and/or the pin (712;969) is fastened in the connection receptacle (715;970) by laser welding.

15. Electronically commutated motor according to any of the preceding claims, wherein the at least two interconnection elements (281, 286) for interconnecting the wire ends (231, 254) have copper guiding means.

16. Electronically commutated motor according to any of the preceding claims, wherein the at least two interconnection elements (281-286) have at least one plane on which the copper guide is arranged.

17. Electronically commutated motor according to any of the preceding claims, wherein the at least two interconnection elements (281-.

18. Electronically commutated motor according to any of the preceding claims, wherein the wire ends (231) and 254) of the single winding (299) are fixed on the contact elements (292) of the respective interconnection element (281 and 286) via a laser welding connection.