Patent ID: 9685845
Date: 2017-06-20
CPC Classifications: H02K,Y10T

Claim:
1. A method for producing a rotor for an electric motor having a squirrel cage and permanent magnets distributed around the circumference, comprising the acts of: providing an asynchronous motor rotor having a laminated core which extends over an entire rotor region of the rotor between short-circuiting rings, the rotor having longitudinally continuous rotor slots each including a cage web portion in a radially outer region of the rotor and a cage bar portion in a radially inner region of the rotor, the cage web portion having a width in a circumferential direction of the rotor smaller than the cage bar portion, wherein the squirrel cage passes through the rotor slots over the entire length of the laminated core and is formed with cage bars which are disposed in the rotor slots and with the short-circuiting rings being connected to the cage bars on both end faces of the laminated core in short-circuiting regions of the rotor; reducing a radius of the rotor over the entire length of the rotor between the short-circuiting rings to a radial depth below an outer radius of the short-circuiting rings by at least the radial thickness of the permanent magnets; and mounting the permanent magnets on the rotor in a region of the rotor having the reduced radius.