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Design of a Vernier Machine With PM on Both Sides of Rotor and Stator

This paper proposes a new type of vernier machine with permanent magnets (PMs) on both sides of rotor and stator. The rotor is of the flux concentrating structure and the stator has also PMs between the flux modulation poles. Compared with the other types of vernier machine, the proposed model has a huge increase in the induced voltage and developed torque at the same size. This shows the possibility of the new suggested machine to the direct-drive applications such as wind-power generators and in-wheel motors.