Device for fixing magnets

摘要

The invention relates to an electric machine (10), in particular a generator for a motor vehicle, comprising an exciter system composed of a plurality of electrically excited salient poles. The salient poles can be designed within the stator (16) or rotor (20) in the form of electromagnetically excited poles (22, 23; 24, 25) which are axially and radially oriented on the periphery and are alternatively polarized in the peripheral direction. In order to improve performance and reduce the magnetic leakage flux, permanent magnets (66), which are secured by means of a magnetically non-excitable holding element (60), are inserted into interstices (74) between the alternating poles (24, 25). The holding element (60) is bilaterally mounted in pole grooves (92, 94), is radially, axially, and tangentially resilient, and has a wave-shaped (62) and/or bead-shaped (76, 78; 86) profile.

主权项

1. An electric machine (10), comprising an exciter system composed of a plurality of electrically excited salient poles within a stator (16) or rotor (20) in the form of electromagnetically excited poles (22, 23; 24, 25), which are axially oriented on a periphery and are alternatively polarized in a peripheral direction, for increasing performance by additional magnetic field strength and comprising permanent magnets (66), which are inserted into interstices (74) between the alternating poles (24, 25), wherein said permanent magnets (66) increase performance by additional magnetic field strength and reducing magnetic flux leakage and which are secured by magnetically non-excitable holding elements (60), each of which is bilaterally mounted in pole grooves (92, 94), characterized in that each holding element (60) is resilient and has a wave-shaped (62) profile along a direction transverse to a longitudinal direction of the holding element (60), wherein the holding element (60) is held by holding collars (112) that are bent away from the permanent magnet (66) such that said holding collars (112) have a substantially round profile when viewed along the longitudinal direction and said holding collars (112) are inserted into the two respective oppositely polarized pole grooves (92) along the longitudinal direction.