Torque and Power Improvement of Integrated Starter Generator Motor with Radially Thin Rotor Core

A novel stress reduction technique using inter-pole slots is proposed for improving the torque and power of an integrated starter generator (ISG) motor with a radially thin rotor core. With a 10% coil-turn reduction and current increasement, the proposed ISG motor achieved a 5.7% torque enhancement and a 14.9% power increasement at the same size as a conventional ISG motor.