Assembly method for a rotor

Patent metadata

Field	Value
Publication number	US-12199480-B2
Application number	US-202217690643-A
Country	US
Kind code	B2
Filing date	Mar 9, 2022
Priority date	May 18, 2021
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A rotor ( 1 ) with a rotation axis ( 2 ) is provided for an electric drive machine ( 3 ). The rotor ( 1 ) has a plurality of rotor assemblies ( 4 ), each of which has a plurality of laminated cores ( 5 ) and a number of magnets ( 7 ) corresponding to a pole pair arrangement ( 6 ). The rotor also has a rotor shaft ( 8 ) on which the rotor assemblies ( 4 ) are fixed. The rotor assemblies ( 4 ) are positioned on the rotor shaft ( 8 ) such that they are rectified in accordance with their axial runout ( 9 ), while taking into account the pole pair arrangement ( 6 ). The rotor can reduce a thermally induced change in imbalance.

First claim

What is claimed is:

1. An assembly method for a rotor ( 1 ), comprising:
providing a plurality of laminated cores ( 5 );
measuring the laminated cores ( 5 ) to determine relative concentricity and axial runout;
providing magnets ( 7 );
respectively connecting one of the laminated cores ( 5 ) to a corresponding number of the magnets ( 7 ) to form a rotor assembly ( 4 ) with a specified pole pair arrangement ( 6 );
providing a rotor shaft ( 8 ) having opposite longitudinal ends and a longitudinal center part between the longitudinal ends;
positioning the rotor shaft ( 8 ) and the rotor assemblies ( 4 ) in relation to one another so that the rotor assemblies ( 4 ) that have greater eccentricity are positioned closer to the longitudinal ends of the rotor shaft ( 8 ) and the rotor assemblies ( 4 ) that have lesser eccentricity are closer to the longitudinal center part of the rotor shaft ( 8 ); and
fixing the rotor shaft ( 8 ) and the rotor assemblies ( 4 ) to one another to form a rotor ( 1 ), the rotor assemblies ( 4 ) being positioned on the rotor shaft ( 8 ) when positioning the rotor shaft ( 8 ) and the rotor assemblies ( 4 ) in relation to one another such that they are rectified in accordance with respective axial runouts ( 9 ) determined when measuring the laminated cores ( 5 ), while taking into account the pole pair arrangement ( 6 ).

2. The assembly method of claim 1 , wherein before the positioning of the rotor shaft ( 8 ) and the rotor assemblies ( 4 ) in relation to one another, the method further comprises sorting a multiplicity of the rotor assemblies ( 4 ) based on their respective axial runout ( 9 ), and the positioning of the rotor shaft ( 8 ) and the rotor assemblies ( 4 ) in relation to one another is carried out based on the sorting of the rotor assemblies ( 4 ) in accordance with their respective axial runout ( 9 ).

3. The assembly method of claim 1 , wherein the positioning of the rotor shaft ( 8 ) and the rotor assemblies ( 4 ) in relation to one another comprises positioning the rotor assemblies ( 4 ) on the rotor shaft ( 8 ) in accordance with their eccentricity ( 10 ) as determined when measuring the laminated cores ( 5 ), and the method further comprising orienting the rotor assemblies ( 4 ) in accordance with their axial runout ( 9 ) and in a sequence corresponding to their axial runout.

4. The assembly method of claim 1 , further comprising positioning at least one balancing disk ( 11 , 12 ) on the rotor shaft ( 8 ) and machining the balancing disk according to a measured imbalance ( 13 ).

5. The assembly method of claim 1 , wherein the rotor ( 1 ) is measured to obtain measurement data of the rotor ( 1 ), and wherein the fixing of the rotor shaft ( 8 ) and the rotor assemblies ( 4 ) to one another is carried out to correlate with the measurement data, and wherein the measurement data are integrated in a machine learning model.

6. A computer program, comprising a computer program code that is capable of being run on at least one computer in such a way that the computer is made to carry out the assembly method of claim 1 , at least one of the computers:
being integrated in an edge device ( 21 ) of an assembly station ( 22 ) as an assembly computer or a component of an assembly computer; and
being set up for communication with a cloud ( 23 ) on which the computer program code is provided.

7. A computer program product on which a computer program code is stored, the computer program code being capable of being be run on at least one computer such that the at least one computer is made to carry out the assembly method of claim 1 , at least one of the computers:
being integrated in an edge device ( 21 ) of an assembly station ( 22 ), as an assembly computer or a component of an assembly computer; and
being set up for communication with a cloud ( 23 ) on which the computer program code is provided.

8. The assembly method of claim 1 , wherein the rotor assemblies ( 4 ) that have a greater axial runout are positioned closer to the longitudinal ends of the rotor shaft ( 8 ) and the rotor assemblies ( 4 ) that have lesser axial runout are closer to the longitudinal center part of the rotor shaft ( 8 ).

Assignees

• Porsche Ag

Inventors

• Wurster Peter

Classifications

• Y10T29/49012

  Rotor · CPC title

• H02K15/03 Primary

  having permanent magnets · CPC title

• H02K1/2798

  where both axial sides of the stator face a rotor · CPC title

• H02K1/2796

  where both axial sides of the rotor face a stator · CPC title

• H02K15/165

  Balancing the rotors · CPC title