Method for manufacturing a solid-pole rotor for an electric machine and solid-pole rotor for an electric machine

Abstract

In order to provide a method for manufacturing a solid-pole rotor which enables short winding heads, better copper fill factors and improved cooling, a method (100) for manufacturing a solid-pole rotor (100) for an electric machine, in particular for an electrically excited synchronous machine, is proposed comprising the steps: a) Manufacturing a, preferably first, mat (15) from shaped wire conductors (16), wherein the shaped wire conductors (16) form a wave winding (17), b) Providing a laminated core (10) with two end faces (11) and a circumferential surface (13), wherein the laminated core (10) has winding slots (12), wherein the winding slots (12) extend from the circumferential surface (13) in the direction of a radially inner region (14) of the laminated core (10), c) Inserting the shaped wire conductors (16) of the, preferably first, mat (15) into the winding slots (12).

Description

[0001] The present invention relates to a method for manufacturing a solid-pole rotor with a wave winding for an electric machine. The present invention further relates to a solid-pole rotor with a wave winding.

[0002] Salient-pole and solid-pole rotors can be used in electrical machines, particularly in electrically excited synchronous machines. Salient-pole rotors have significant disadvantages compared to solid-pole rotors with regard to heat dissipation and cooling due to the use of round wires for the rotor winding. Furthermore, salient-pole rotors have a lower copper fill factor and require a longer manufacturing time. Solid-pole rotors with shaped coils are complex to manufacture. In particular, the shaped coils for each pole of the solid-pole rotor must be wound individually and inserted into a laminated core of the rotor.

[0003] From DE 20 2021 000 397 U1, a universal electric machine with planetary gearing is known, which has 2-pole excitation pole wheels that are driven by means of a planetary gearing, wherein the 2-pole excitation pole wheels are located in cylindrical recesses in legs of U-shaped cut-pool cores, which are arranged symmetrically around the 2 armatures or rotors, which, depending on the type of machine, are designed practically like an armature of a DC machine or like a three-phase slip-ring rotor with slots at uniform intervals and, depending on requirements, are provided with at least one shaft winding, two-layer winding, loop winding, short-circuit winding or another winding and are connected to slip rings.

[0004] GB 1,185,891 A discloses a turbogenerator rotor with an excitation winding, the inductors of which are arranged in at least two layers according to the scheme of the overlap or wave winding, wherein the inductors form a coil edge with individual internal cooling.

[0005] DE 10 2021 122 045 A1 relates to a rotor for an electric motor vehicle. The rotor is designed as a solid-pole rotor with several slots per pole, each slot containing at least one winding element. The at least one winding element occupies at least two slots of the respective pole. The slots assigned to each pole extend parallel to each other from an outer surface of the rotor inwards, so that the at least one winding element assigned to each pole can be inserted radially into the slots.

[0006] The present invention is based on the objective of providing a method for manufacturing a solid pole rotor with which short winding heads, better copper fill factors and improved cooling can be achieved.

[0007] To solve the problem underlying the invention, a method for manufacturing a solid pole rotor for an electric machine, in particular for an electrically excited synchronous machine, is proposed, comprising the steps: a) Manufacturing a, preferably first, mat of shaped wire conductors, wherein the shaped wire conductors form a wave winding, b) Providing a laminated core with two end faces and a circumferential surface, wherein the laminated core has winding slots, the winding slots extending from the circumferential surface towards a radially inner region of the laminated core, c) Inserting the shaped wire conductors of the, preferably first, mat into the winding slots.

[0008] The laminated core has two end faces and a circumferential surface and can therefore preferably be approximately cylindrical. Starting from the circumferential surface, winding grooves extend towards a radially inner region of the laminated core. The winding grooves are preferably open to the outside and further preferably extend from a first of the two end faces to a second of the two end faces along the entire axial length of the laminated core.

[0009] The shaped wire conductors can be flat wire conductors.

[0010] The wave winding formed from the shaped wire conductors can also be called a continuous hairpin winding.

[0011] According to the invention, the shaped wire conductors of the, preferably first, mat are inserted into the winding slots. Thus, a solid-pole rotor with a wave winding is produced by the inventive method.

[0012] Due to the wave winding, the winding heads of the manufactured solid-pole rotor are shorter than with other manufacturing methods. Furthermore, the use of shaped wire conductors for the mat results in a higher copper fill factor, and the cooling of the solid-pole rotor during operation in an electric machine equipped with such a rotor can be improved.

[0013] Preferably, the mat is an endless mat, and / or the wave winding is an endless wave winding.

[0014] This makes it possible to produce the entire wave winding of the solid-pole rotor by inserting the shaped wire conductors from a single mat. It is therefore not strictly necessary, although possible, to provide multiple mats of shaped wire conductors and insert the shaped wire conductors of the multiple mats into the winding slots.

[0015] Preferably, step c) includes rolling the mat onto the circumferential surface of the sheet metal package.

[0016] The mat can therefore also be called a winding mat.

[0017] In other words, starting with the insertion of at least one shaped wire conductor of the mat into a first winding groove of the laminated core, the mat is rolled onto the circumferential surface of the laminated core, so that the shaped wire conductors of the mat can be successively inserted into the individual winding grooves.

[0018] Either the mat can be wrapped around a sheet metal stack that is stationary in space, or the sheet metal stack can be rotated around its axis so that the mat is wound onto the circumferential surface of the sheet metal stack.

[0019] A further advantage is that the mat can be rolled onto the circumferential surface of the sheet metal package multiple times, especially in several layers, so that the shaped wire conductors are arranged in several layers in the winding grooves.

[0020] During the first wrapping of the laminated core with the mat, an initial number of shaped wire conductors are inserted into the winding slots of the laminated core. These shaped wire conductors can be pushed into the winding slots in the direction of the radially inner area of ​​the rotor and come to rest at the bottom of the winding slots. During a second wrapping of the laminated core with the mat, another layer of shaped wire conductors is inserted into the winding slots. Consequently, several layers of shaped wire conductors are arranged in each winding slot.

[0021] Preferably, the mat is rolled up using a tensioning tool, wherein the tensioning tool stretches or compresses the mat so that the shaped wire conductors of the mat can be inserted into the winding grooves.

[0022] Since the winding slots in an embodiment described below can be aligned radially with the laminated core, the distance between adjacent winding slots decreases in the direction of the laminated core's axis of rotation. The shaped wire conductors of the, preferably first, mat, which form a wave winding, are shaped accordingly to correspond to the respective distance between adjacent winding slots in terms of the depth at which the respective shaped wire conductors are laid. To allow the insertion of the shaped wire conductors into the winding slots, it may be necessary to stretch the mat so that the shaped wire conductors can be easily inserted into the openings of the winding slots located in the circumferential surface.

[0023] A further advantage is that the solid pole rotor to be manufactured has poles, with each pole comprising a number of winding slots.

[0024] It may then be preferable to provide that the winding slots of a pole are aligned in a radial direction of the laminated core.

[0025] In other words, the distance between adjacent winding slots decreases in the direction of the rotation axis of the laminated core. If the winding slots of all poles of the solid-pole rotor are aligned in one radial direction of the laminated core, then all winding slots of the laminated core are aligned in one radial direction of the laminated core.

[0026] Furthermore, it can be provided that the winding slots of one pole are aligned parallel to each other.

[0027] Accordingly, the mutual spacing of the winding slots of a pole does not change in the direction of the rotation axis of the laminated core.

[0028] Preferably, the laminated core has a first group of winding slots and a second group of winding slots, wherein the winding slots of the first group and the winding slots of the second group are arranged alternately over the circumferential surface and / or a circumference of the laminated core.

[0029] This makes it possible to provide separate mats for the winding slots of the first group and for the winding slots of the second group, and to insert the shaped wire conductors of the first mat and the second mat into the winding slots of the first group and into the winding slots of the second group, respectively.

[0030] Furthermore, it may also be provided that the winding slots of the first group have a greater depth and / or a greater width than the winding slots of the second group.

[0031] The depth of each winding slot is determined from the circumferential surface to the bottom of the winding slot. The width corresponds to the width of the winding slots in the circumferential direction of the laminated core.

[0032] Furthermore, it may preferably be provided that step c) comprises inserting the shaped wire conductors of the first mat into the winding slots of the first group, and that the method further comprises the steps: d) Manufacturing a second mat from shaped wire conductors, wherein the shaped wire conductors form a wave winding, e) Inserting the shaped wire conductors of the second mat into the winding slots of the second group, includes.

[0033] In particular, if the winding slots of the first group and the winding slots of the second group differ in depth and / or width, it may be advantageous to provide a mat of shaped wire conductors for each of the groups of winding slots and to roll the first and second mats onto the laminated core in preferably successive manufacturing steps, thus introducing the shaped wire conductors of the first mat and the second mat, respectively, into the winding slots of the first group and the second group, respectively.

[0034] Furthermore, preferably at least one safety element, in particular a safety strip, is provided, wherein the method further comprises the step: f) Inserting the locking element, preferably along a rotor axial direction, into one of the winding slots, such that the locking element is arranged in the winding slot in such a way as to prevent centrifugal force-induced escape of the shaped wire conductors of the shaft winding arranged in the winding slot.

[0035] The locking element is preferably arranged in the area of ​​the circumferential surface, so that the shaped wire conductors arranged in the winding groove are located closer to the axis of rotation of the laminated core when viewed in the radial direction of the laminated core.

[0036] During operation of an electric machine equipped with such a solid-pole rotor, centrifugal forces act on the wire conductors, causing them to be driven radially outwards. The retaining element, positioned further out in the radial direction, then prevents the wire conductors from exiting the winding slots. Furthermore, the retaining elements ensure the smoothest possible circumferential surface, thereby improving the smooth running of an electric machine equipped with a solid-pole rotor.

[0037] The locking elements are preferably designed as locking strips and their dimensions correspond approximately to the axial length of the winding slots measured from the first end face to the second end face and the width of the winding slots measured in the circumferential direction of the laminated core.

[0038] If the locking elements, in particular the locking strips, are arranged in the winding grooves, they cover the openings of the winding grooves when viewed from the outside onto the circumferential surface.

[0039] Preferably, insertion grooves for the locking elements, especially the locking strips, can be provided in the winding grooves, particularly in the area of ​​the openings of the winding grooves in the circumferential surface of the laminated core. The insertion grooves extend in the walls of the winding grooves from the first end face to the second end face. The locking elements, especially the locking strips, can be inserted into the insertion grooves and form a positive fit with the material of the laminated core, thus securing the locking elements against centrifugal forces in the radial direction.

[0040] Furthermore, it can be provided that a, preferably first, locking device is provided, wherein the, preferably first, locking device comprises a base section, in particular a ring, and a plurality of locking elements, wherein the locking elements are arranged projecting from the base section in an axial direction, wherein step f) further comprises the step: g) Placing the, preferably first, locking device along a rotor axial direction in the direction of a first end face of the laminated core onto the laminated core and inserting the locking elements of the, preferably first, locking device along the rotor axial direction into a number of the winding slots, preferably into the winding slots of the first group and / or the second group.

[0041] If the locking device is placed on the laminated core along the rotor axis towards the first end face, the axial direction of the locking device essentially corresponds to the rotor axis. The locking device comprises a plurality of locking elements which are simultaneously inserted into the winding slots when the locking device is placed on the laminated core.

[0042] The safety device can also be called a locking cap. The safety device can be made of plastic or metal.

[0043] To attach the locking device to the sheet metal assembly, a screw connection, clips or welding can be provided in a suitable manner.

[0044] With a further advantage, a second locking device is provided, wherein in step g) the first locking device is placed on the laminated core along the rotor axial direction in the direction of the first end face of the laminated core and the locking elements are inserted into the winding slots of the first group along the rotor axial direction, wherein the method further comprises the step: h) Placing the second locking device on the laminated core along the rotor axial direction towards a second end face of the laminated core and inserting the locking elements of the second locking device along the rotor axial direction into the winding slots of the second group.

[0045] The first and second locking devices are thus placed onto the laminated core from opposite directions, with the first locking device being placed on the first end face of the laminated core and the second locking device being placed on the second end face of the laminated core. It is particularly advantageous if the winding slots of the first group and the winding slots of the second group are arranged alternately in the circumferential direction of the laminated core.

[0046] The otherwise preferably identically designed locking devices are rotated by an angle corresponding to the angular distance between a groove of the first group and the directly adjacent groove of the second group when placed on the first end face and the second end face of the sheet metal stack.

[0047] Furthermore, it is preferably provided that the base sections, in particular the rings, of the first locking device and the second locking device comprise openings, and that the ends of the locking elements, in particular the locking strips, facing away from the respective base section have locking elements, and that in step h) the locking elements of the locking elements of the first locking device are inserted into the openings of the base section of the second locking device and the locking elements of the locking elements of the second locking device are inserted into the openings of the base section of the first locking device.

[0048] By inserting the locking elements into their respective assigned openings, the locking elements engage, so that the first locking device and the second locking device are connected to each other in a force-fit and form-fit manner.

[0049] Another solution to the problem underlying the invention lies in a solid pole rotor for an electric machine, in particular for an electrically excited synchronous machine, manufactured or manufacturable using a method described above.

[0050] All characteristics arising from the manufacturing process with regard to the solid-pole rotor to be produced can be transferred to the solid-pole rotor in a corresponding manner.

[0051] Accordingly, the solid pole rotor comprises a wave winding which is arranged in winding slots of a laminated core.

[0052] The shaped wire conductors can be arranged in several layers in the winding slots.

[0053] The solid pole rotor preferably has poles, with each pole comprising a number of winding slots.

[0054] The winding slots of a pole can be aligned in a radial direction of the laminated core or parallel to each other.

[0055] Furthermore, the laminated core of the solid pole rotor can comprise a first group of winding slots and a second group of winding slots, wherein the winding slots of the first group and the winding slots of the second group are alternately distributed over a circumferential area and / or a circumference of the laminated core.

[0056] The winding slots of the first group and the second group can have a greater depth and / or a greater width than the winding slots of the second group.

[0057] Furthermore, the solid pole rotor can have at least one safety device or two safety devices, as explained above.

[0058] The invention is explained in more detail below with reference to the accompanying figures. These show Fig. 1 a top view of an end face of a solid polar rotor, Fig. 2 a device for producing a mat from shaped wire conductors, Fig. 3 a tensioning tool for rolling up a mat of shaped wire conductors onto a sheet metal stack for a solid pole rotor, Fig. 4 a top view of an end face of a laminated core for another solid-pole rotor, Fig. 5 a top view of one end face of yet another solid-pole rotor, Fig. 6 a safety device for a solid pole rotor, Fig. 7 a cross-sectional view of a winding slot of a laminated core of a solid pole rotor with shaped wire conductors, Fig. 8 a connection of two safety devices, Fig. 9 a schematic diagram for a connection of the two safety devices, and Fig. 10 a flowchart for a process for manufacturing a solid pole rotor.

[0059] A method 100 in accordance with the invention is explained in more detail with reference to the figures. Fig. Figure 1 shows a solid-pole rotor 200 for an electric machine. The solid-pole rotor has a laminated core 10. In Fig. Figure 1 shows the laminated core 10 along a rotor axial direction perpendicular to the plane of the drawing in a top view of one of the end faces 11. The laminated core 10 also has winding slots 12, which extend from a circumferential surface 13 of the laminated core 10 towards a radially inner region 14 of the laminated core 10. For the sake of clarity, in Fig. 1. The winding slots 12 are shown only for one sector or quadrant of the laminated core 10. In principle, winding slots 12 are provided over the entire circumference of the laminated core 10. As per the procedure, as shown in Fig. Figure 2 shows that, in a first step, a mat 15 is produced from shaped wire conductors 16, wherein the shaped wire conductors 16 form a wave winding 17. For this purpose, for example, shaped wire conductors 16 made of copper can be wound around a rotating blade 18.

[0060] The shaped wire conductors 16 of the mat 15 are then inserted into the winding slots 12, so that they are, as in Fig. As shown in Figure 1, the mat 15 can be laid in the winding slots 12. For this purpose, the mat 15 can be rolled onto the circumferential surface 13 of the lamination stack 10. To this end, as shown in Figure 1, the mat 15 can be laid in the winding slots 12. Fig. As shown in Figure 3, a clamping tool 19 is used which stretches or compresses the mat 15 so that the shaped wire conductors 16 of the mat 15 can be inserted into the winding slots 12. The mat 15 can also be wound multiple times, in particular in several layers 20a, 20b, 20c, 20d, onto the circumferential surface 13 of the laminated core 10, so that the shaped wire conductors 16, as shown in Figure 3, are inserted into the winding slots 12. Fig. 1 and Fig. Figure 3 shows that the components are arranged in several layers 20a, 20b, 20c, 20d in the winding slots 12. This results in a continuous winding process.

[0061] The solid-pole rotor 200 produced by method 100 has several poles 21a, 21b, each pole 21a, 21b comprising a number of winding slots 12. The winding slots 12 of each pole 21a, 21b can be aligned in a radial direction 22 of the laminated core 10 ( Fig. 1) Furthermore, it is also possible that the winding slots 12 of a respective pole 21a, 21b are aligned parallel to each other. This case is in Fig. 4 shown.

[0062] After Fig. 5. The winding slots 12 can be divided into a first group 23a of winding slots 12 and a second group 23b of winding slots 12, wherein the winding slots 12 of the first group 23a and the winding slots 12 of the second group 23b are arranged alternately over the circumferential surface 13 of the laminated core 10. The winding slots 12 of the first group 23a can have a greater depth 24 and a greater width 25 than the winding slots 12 of the second group 23b. In this case, it is preferred that, within the framework of the method 100 for manufacturing the solid-pole rotor 200, a second mat of shaped wire conductors 16 is produced analogously to the first mat 15 of shaped wire conductors 16, wherein the shaped wire conductors of the second mat also form a wave winding.First, the first mat 15, consisting of shaped wire conductors 16, is wound onto the circumferential surface 13 of the laminated core 10, so that the shaped wire conductors 16 of the first mat 15 are inserted into the winding slots 12 of the first group 23a. Then, the second mat is wound onto the circumferential surface 13 of the laminated core 10, so that the shaped wire conductors of the second mat are inserted into the winding slots 12 of the second group 23b. As in . Fig. 1 are listed for clarity in Fig. 5 also shows the winding slots 12 only for one sector or quadrant of the laminated core 10. In principle, winding slots 12 are provided over the entire circumference of the laminated core 10.

[0063] To prevent centrifugal force-induced escape of the shaped wire conductors 16 from the winding slots 12 during the operation of an electric machine equipped with such a solid-pole rotor 200, safety devices 26 can be provided. Such a safety device 26 is shown in Fig. Figure 6 shows the locking device 26. It comprises a base section 27, which is designed as a ring 28, and a plurality of locking elements 30 designed as locking strips 29, which project in an axial direction 31 from the base section 27 designed as a ring 28. A first locking device 26 is placed on the laminated core 10 along the rotor axial direction in the direction of the first end face 11 of the laminated core 10, so that the locking strips 29 are inserted into the winding slots 12 in the rotor axial direction and thus close the winding slots 12 to the outside.

[0064] In the cross-sectional view of a winding slot 12 according to Fig. Figure 7 shows the arrangement of a locking strip 29 in the winding groove 12. The winding groove 12 has insertion slots 32 in the walls 36 of the circumferential surface 13, into which the locking strip 29 engages and forms a positive connection with the material of the laminated core 10. This prevents the wire conductors 16, which are located further inwards in the radial direction 22, from escaping to the outside during operation of an electric machine equipped with the solid-pole rotor 200.

[0065] The locking strips 29 of the first locking device 26 are inserted into the winding slots 12 of the first group 23a. A second locking device 26, essentially identical in design, is placed on the second end face of the laminated core 10 opposite the first end face 11, so that the locking elements 30, designed as locking strips 29, are inserted into the winding slots 12 of the second group 23b of winding slots 12.

[0066] Each of the base sections 27, designed as rings 28, has openings 33 arranged between two locking strips 29. The ends 34 of the locking elements 30 facing away from the base sections 27 are connected by Fig. 8 shown and designed in the form of locking projections 35, provided with locking elements 37. After Fig. 8 The locking projections 35 of the ends 34 of the locking elements 30 facing away from the base sections 27 are inserted into the openings 33 of the base sections 27 of the respective other locking device 26, so that the locking devices 26 are connected to each other. Fig. Figure 9 shows a schematic diagram of the connection of two safety devices 26.

[0067] Fig.Figure 10 shows a flowchart of a process 100 in accordance with the invention. In a first process step S1, a mat 15 is produced from shaped wire conductors 16, wherein the shaped wire conductors 16 form a wave winding 17. In a further process step S2, a laminated core 10 with two end faces 11 and a circumferential surface 13 is provided, wherein the laminated core 10 has winding slots 12, the winding slots 12 extending from the circumferential surface 13 towards a radially inner region 14 of the laminated core 10. In a further process step S3, the shaped wire conductors 16 of the mat 15 are inserted into the winding slots 12. Reference symbol list 100 procedures 200 solid-pole rotor 10 sheet metal packages 11 Front 12 winding slots 13 Circumferential area 14 Inner area 15 mats 16 shaped wire conductors 17 Wave winding 18 Sword 19 clamping tools 20a-20d Location 21a, 21b Pol 22 Radial direction 23a First Group 23b Second Group 24 Depth 25 width 26 Safety device 27 Basic section 28 rings 29 fuse strip 30 locking element 31 Axial direction 32 Insertion slot 33 Opening 34 End 35 Rastvorsprung 36 Wall 37 Latching element S1-S3 process steps QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 20 2021 000 397 U1

[0003] GB 1,185,891 A

[0004] DE 10 2021 122 045 A1

[0005]

Claims

[1] Method (100) for producing a solid pole rotor (200) for an electrical machine, in particular for an electrically excited synchronous machine, comprising the steps: a) producing a, preferably first, mat (15) from shaped wire conductors (16), wherein the shaped wire conductors (16) form a wave winding (17), b) providing a laminated core (10) with two end faces (11) and a peripheral surface (13), wherein the laminated core (10) has winding slots (12), wherein the winding slots (12) extend from the peripheral surface (13) in the direction of a radially inner region (14) of the laminated core (10), c) Inserting the shaped wire conductors (16) of the, preferably first, mat (15) into the winding grooves (12). [2] Method (100) according to claim 1, characterized bythat step c) comprises rolling up the mat (15) onto the circumferential surface (13) of the laminated core (10), wherein preferably the mat (15) is rolled up several times, in particular in several layers (20a, 20b, 20c, 20d), onto the circumferential surface (13) of the laminated core (10), so that the shaped wire conductors (16) are arranged in several layers (20a, 20b, 20c, 20d) in the winding slots (12), wherein more preferably the rolling up of the mat (15) takes place by means of a clamping tool (19), wherein the clamping tool (19) stretches or compresses the mat (15) so that the shaped wire conductors (16) of the mat (15) can be introduced into the winding slots (12). [3] Method (100) according to one of the preceding claims, characterized byin that the solid-pole rotor (200) to be produced has poles (21a, 21b), wherein each pole (21a, 21b) comprises a number of winding slots (12), wherein the winding slots (12) of a pole (21a, 21b) are aligned in a radial direction (22) of the laminated core (10), and / or wherein the winding slots (12) of a pole (21a, 21b) are aligned parallel to one another. [4] Method (100) according to one of the preceding claims, characterized byin that the laminated core (10) has a first group (23a) of winding slots (12) and a second group (23b) of winding slots (12), wherein the winding slots (12) of the first group (23a) and the winding slots (12) of the second group (23b) are preferably arranged alternately over the circumferential surface (13) and / or a circumference of the laminated core (10), wherein more preferably the winding slots (12) of the first group (23a) have a greater depth (24) and / or a greater width (25) than the winding slots (12) of the second group (23b). [5] Method (100) according to claim 4, characterized by that step c) comprises inserting the shaped wire conductors (16) of the first mat (15) into the winding grooves (12) of the first group (23a), and that the method further comprises the steps: d) producing a second mat of shaped wire conductors, the shaped wire conductors forming a wave winding, e) inserting the shaped wire conductors of the second mat into the winding grooves (12) of the second group (23b). [6] Method (100) according to one of the preceding claims, characterized by that at least one security element (30), in particular a security strip (29), is provided, the method further comprising the step: f) inserting the securing element (30), preferably along a rotor axial direction, into one of the winding slots (12), so that the securing element (30) is arranged in the winding slot (12) in such a way that centrifugal force-induced escape of the shaped wire conductors (16) of the wave winding (17) arranged in the winding slot (12) is prevented. [7] Method (100) according to claim 6, characterized bythat a, preferably first, securing device (26) is provided, wherein the, preferably first, securing device (26) comprises a base section (27), in particular a ring (28), and a plurality of securing elements (30), wherein the securing elements (30) are arranged protruding from the base section (27) in an axial direction (31), wherein step f) further comprises the step: g) placing the, preferably first, securing device (26) along the rotor axial direction in the direction of a first end face (11) of the laminated core (10) onto the laminated core (10) and inserting the securing elements (30) of the, preferably first, securing device (26) along the rotor axial direction into a number of the winding slots (12), preferably into the winding slots (12) of the first group (23a) and / or the second group (23b). [8] Method (100) according to claim 7, characterized bythat a second securing device (26) is provided, wherein in step g) the first securing device (26) is placed onto the laminated core (10) along the rotor axial direction in the direction of the first end face (11) of the laminated core (10) and the securing elements (30) are introduced into the winding slots (12) of the first group (23a) along the rotor axial direction, wherein the method (100) further comprises the step: h) placing the second securing device (26) along the rotor axial direction in the direction of a second end face of the laminated core (10) onto the laminated core (10) and inserting the securing elements (30) of the second securing device (26) along the rotor axial direction into the winding slots (12) of the second group (23b). [9] Method (100) according to claim 7 or 8, characterized bythat the base sections (27), in particular the rings (28), of the first securing device (26) and of the second securing device (26) comprise openings (33), and that the ends (34) of the securing elements (30), in particular of the securing strips (29), facing away from the respective base section (27) have locking elements (37), and that in step h) the locking elements (37) of the securing elements (30) of the first securing device (26) are introduced into the openings (33) of the base section (27) of the second securing device (26) and the locking elements (37) of the securing elements (30) of the second securing device (26) are introduced into the openings (33) of the base section (27) of the first securing device (26). [10] Full-pole rotor (200) for an electrical machine, in particular for an electrically excited synchronous machine, manufactured or producible by a method (100) according to one of the preceding claims.

Images