Production Method for a Rotor of a Reluctance Machine and Rotor for a Reluctance Machine

Abstract

A method for producing a rotor for a reluctance machine, in particular for a synchronous reluctance machine, and a rotor produced by the method, are provided. The laminated rotor core is produced by punching and stacking two or more adjacent laminations of the core. The adjacent laminations are held together by at least one connection point created during the punch stacking, the at least one connection point simultaneously forming a flux barrier of the rotor. The rotor comprises a laminated core, which is stacked from at least two lamination sheets, with the at least two adjacent lamination cuts being connected to each other by at least one connection point forming at least one flux barrier of the rotor.

Claims

1-10. (canceled)

11. A method for producing a rotor for a synchronous reluctance machine, comprising the acts of: stacking a plurality of stamped rotor packet sheets, each sheet having at least one flux barrier and at least one connection point, on a common axis with the connection points of the plurality of stamped rotor packet sheets axially aligned; and engaging the connection points of adjacent sheets of the plurality of stamped rotor packet sheets with one another in a manner which axially fixes the adjacent sheets together by inter-connection. wherein the connection points are configured as flux barriers.

12. The method as claimed in claim 11, wherein the connection points each include a stamped packet-assembly lug arranged to be inserted into a corresponding mating point of an adjacent sheet.

13. The method as claimed in claim 11, wherein the connection points of the plurality of stamped rotor packet sheets are arranged in flux-barrier portions of the plurality of stamped rotor packet sheets containing a q-axis of the rotor.

14. The method as claimed in claim 13, wherein at least one of the at least one flux barriers is at least one connection point of the at least one connection points of the plurality of stamped rotor packet sheets that is located at a radially outer region of the sheets.

15. The method as claimed in claim 14, wherein the at least one connection point configured as a flux barrier located in the radially outer region of the plurality of stamped rotor is a single connection point or a multi-segment connection point having a plurality of separate adjacent connection point segments.

16. The method as claimed in claim 11, wherein the rotor is an internal rotor or an external rotor.

17. The method as claimed in claim 11, wherein the stack of the plurality of stamped rotor packet sheets has at least one of a diameter of less than or equal to 150 mm and an axial length of less than or equal to 200 mm.

18. A rotor for a synchronous reluctance machine, comprising: a plurality of stamped rotor packet sheets stacked on a common axis, wherein each sheet of the plurality of stamped rotor packet sheets includes at least one flux barrier and at least one connection point, the plurality of stamped rotor packet sheets are stacked with the connection points of the plurality of stamped rotor packet sheets axially aligned, the connection points of adjacent sheets of the plurality of stamped rotor packet sheets axially fixes the adjacent sheets together by inter-connection, and the at least one connection point of each sheet of the plurality of stamped rotor packet sheets is configured as a flux barrier.

19. A synchronous reluctance machine, comprising: the rotor as claimed in claim 18.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG. 1 shows a cross-section view of a rotor in accordance with an embodiment of the present invention

DETAILED DESCRIPTION

[0035] The single figure shows an individual sheet section 1 of the rotor according to the invention for a reluctance motor. For the purpose of simplifying the representation, the stator has not been illustrated. The rotor sheet 1 shown can be subdivided into four identically constructed sectors of a circle, each sector being provided with several recesses 2 which perform the function of flux barriers. By virtue of the arrangement of the flux barriers 2, a four-pole rotor is formed, the magnetic flux of which is inhibited in the regions with flux barriers 2. The portions having high magnetic conductivity are characterized as the d-axis, and the region of lower magnetic conductivity is characterized as the q-axis.

[0036] For the production of the rotor, several rotor sheets 1 are stamped out of a supplied sheet-metal strip and, in the same step, are stacked in the axial rotor axis to yield the resultant sheet packet of the rotor. The connection between the individual sheet sections 1 of the sheet packet is effected via so-called stamped lugs which engage with corresponding mating points of the underlying sheet section 1 and establish a clamping connection between the sheet sections 1. The points of connection bring about a more axial fixing and a torsionally stiff connection between the sheet sections 1.

[0037] In the illustration, the sheet section 1 displays a total of eight packet-assembly lugs 10, a total of four lugs 10′ having been arranged symmetrically around the center bore 5 of the sheet section 1.

[0038] The exterior packet-assembly lugs 10″ are situated in the radial direction at the outer edge of the sheet section 1, distributed symmetrically with respect to the midpoint of the sheet section 1. These packet-assembly lugs 10″ simultaneously constitute the exterior flux barriers of the total of four flux-barring portions of the sheet packet.

[0039] In the case of the solution according to the invention, two commercially available technologies are combined in advantageous manner, and the synergistic effects resulting thereby are exploited. On the one hand, the stamped packet assembly is employed for the production of a rotor for a reluctance machine, in which connection the packet-assembly lugs to be provided here in any case are utilized simultaneously as flux barriers. In this case, the outermost flux barriers 10″ are introduced into the sheet during the packet-assembly process.

[0040] The invention offers a reliable process for production of a rotor packet for a reluctance machine. A stable support of the individual sheet sections 1 of a sheet packet is obtained, by virtue of which a better handling in manufacture can be achieved. In comparison with the previous methods for manufacturing rotors of reluctance machines, a disadvantageous overspeeding of the sheet packet no longer occurs. In addition, the otherwise necessary end disks may be dispensed with or may be dimensioned to be distinctly smaller, since the elaborate counterbalancing of the rotor is no longer necessary. The end disks can turn out to be significantly smaller, by virtue of which a new design with an optimized balancing is possible. Also, the elastic expansion of the packet can be dispensed with completely.

[0041] The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.