Actions to increase the cogging torque and effects of the increased cogging torque to permanent magnet DC motors

In this paper the cogging torque of an existing permanent magnet DC motor must be increased. Thus motors are frequently used in motor vehicles. In order to hold a position the motor must be under current, because in most cases the cogging torque is too small to keep the motor in position. The possibilities to decrease cogging torques are well known… (More)