Electric machine for use as three-phase generator, for supplying electrical energy to electrical system in motor vehicle, has permanent magnet ring comprising unipolar radial magnet directly connected to rotor shaft

摘要

The machine (10) has a claw pole rotor (14) comprising hybrid-excited electromagnetic and permanent magnetic claw pole modules (16a, 16b) arranged axially adjacent to each other on a rotor shaft (15). The module (16a) has a field coil (17) for electromagnetic excitation and the module (16b) has a permanent magnet ring (25) for permanent magnetic excitation. Each module has two axially spaced claw pole disks (18, 20) with pole fingers (19) interlocked in the outer periphery. The ring has an unipolar radial magnet directly connected to the rotor shaft over a forward conductance ring (26).