Patent ID: 6548935
Filing Date: 2003-04-15
Classification: H02K

Abstract:
An electric machine, having an excitation system comprised of a number of electrically excited individual poles in one of a stator and a rotor of said electrical machine, embodied in the form of electromagnetically excited poles (37, 38), wherein said poles (37, 38) are oriented axially along the circumference and wherein polarity of said poles (37, 38) alternates in the circumferential direction, and having permanent magnets (43), wherein said permanent magnets (43) are inserted into intermediary spaces (42) between the alternating poles (37, 38) in order to reduce the magnetic leakage flux, characterized in that the permanent magnets (43) are each secured by means of a securing element (44), wherein said securing element (44) cannot be excited magnetically and is secured within respective pole grooves (46, 47) being formed in respective sides of said poles, wherein one pole groove (46) is let into the longitudinal side of a pole (37) and wherein respective said pole grooves are longitudinally formed into respective two longitudinal sides of each of said poles, wherein said rotor (39), a base region (52) of the securing element (44) covers the respective permanent magnet (43) in the radial direction toward the stator (40), wherein the securing element (44) also has bent tabs (54) at two opposite ends of the base region (52), said tabs exert a clamping force on axial end faces of the inserted permanent magnet.