Patent ID: 6013968
Filing Date: 2000-01-11
Classification: H02K

Abstract:
A synchronous machine formed as a generator for a motor vehicle, comprising a rotor; an excitation system including a plurality of electrically excited individual poles provided in said rotor and formed as claw poles excited by at least one excitation coil; a plurality of permanent magnets inserted in free spaces between said claw poles, said poles having pole plates on which said permanent magnets are arranged; a holder which supports and holds said permanent magnets, said holder being composed of two non-magnetic receiving cages each having a ring disc, said ring disc being arranged between inner sides of pole plates and end sides of said excitation coil located between said pole plates, said ring disc being provided with a plurality of bent strip sections forming a receiving chamber for each free space for at least one of said permanent magnets such that it is closed at least toward an axial center of said rotor and toward a centrifugally-loaded side of the free space, said receiving chambers being fixed on elements selected from the group consisting of said claw poles, said pole plates, and both.