Rotor i.e. spoke rotor, for use in synchronous motor that is installed in electric drive unit of motor car, has retaining ring formed in annular form, and resilient attachment unit partially resting on permanent magnet

摘要

#CMT# #/CMT# The rotor has a suspension strand (520) for fixing a permanent magnet in a recess. The suspension strand comprises a retaining ring (51) formed in an annular form and concentrically arranged around a rotational axis. The suspension strand includes a comb-shaped resilient attachment unit (52), which is integrally arranged on the retaining ring and inwardly extended into the recess in an axial direction (20). The resilient attachment unit partially rests on the permanent magnet, and is designed as a punched bent part. The suspension strand is made from metal such as spring steel. #CMT# : #/CMT# Independent claims are also included for the following: (1) a stator for an electric machine (2) a synchronous motor. #CMT#USE : #/CMT# Rotor i.e. spoke rotor, for use in an electric machine i.e. synchronous motor, which is installed in a hand-held power tool e.g. drilling machine and fret saw, an electrically powered bicycle and an electric drive unit in a motor car (all claimed). #CMT#ADVANTAGE : #/CMT# The resilient attachment unit is integrally arranged on the retaining ring that is formed in the annular form, so that inexpensive manufacture and simple assembly of the suspension strand in the rotor can be enabled. The resilient attachment unit partially rests on the permanent magnet, so that component tolerances of the permanent magnet and its temperature behavior can be compensated in a better manner, thus avoiding a punctiform load of the permanent magnet in a contact region between the permanent magnet and the attachment unit. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a perspective view of a suspension strand for a rotor. 20 : Axial direction 51 : Retaining ring 52 : Comb-shaped resilient attachment unit 520 : Suspension strand 521 : Deformation unit.