Simulation of Rotor Core and Shaft Assembly of e-Motor

Intro

Below is an example of a rotor assembly that is going to be used for the analysis.

 

 

On the following picture is a symmetric model. At the end of the rotor core is a special tool for packing the rotor lamination sheets.

 

 

First the rotor lamination sheets are formed into a package with the application of a force F=Fd. The rotor pack is heated to specific value, Th., and then shaft is inserted without significant force. The rotor pack+shaft configuration is cooled down and the interference fit is acting upon the mating parts. At the end the force F=Fd is removed.

You can read more on the assembly process of rotor core and shaft here:

https://caetools.org/2020/12/06/assembly-process-of-rotor-electric-motor/

 

The picture below describes the simulation steps of one assembly method for rotor core and shaft.

 

FEA Results

Below are some results from the simulation model.