LOW COGGING TORQUE AND HIGH TORQUE DENSITY TRACTION MOTOR

摘要

To provide a rotor assembly that reduces cogging torque in a permanent magnet motor, thereby reducing potential NVH problems.SOLUTION: An assembly utilizes two layers of magnets within a lamination stack, an inner layer is positioned closer to a rotor and comprised of larger magnets, and an outer layer is positioned closer to an outer lamination stack surface and comprised of smaller magnets. The magnets within each layer are configured in pairs, and each magnet pair forms a V-shaped arrangement.SELECTED DRAWING: Figure 3