Rotary DC electrical machine has permanent magnet rotor and axially magnetized annular magnets or annular coils provided at each end of stator or stator mantle

摘要

The electrical machine has a stator (2) with open stator slots and an iron stator mantle (1) for closing each second stator slot, enclosing a rotor (4) provided with flat magnets (5), corresponding in number to the stator slots, providing opposing magnetic fields (6) which cooperate with the stator winding currents. The axial ends of the stator or the stator mantle are provided with axially magnetized annular magnets or annular coils with a number of windings connected in series with the stator windings.