A New Rotor Slotting Method for Reducing the Vibration and Noise of IPMSMs

In this paper, a new rotor slotting method is proposed to reduce the vibration and noise of interior permanent-magnet synchronous machines (IPMSMs). By using the proposed rotor slotting method, new harmonic components are introduced into the air-gap permeance, reducing the specific radial electromagnetic force density (REFD) and concentrated radial force (CRF), and finally the machine’s vibration is reduced. After applying the Non-dominated Sorting Genetic Algorithm-II (NSGA-II), the optimal slot location, number and size to achieve the best vibration weakening results can be found. On this basis, the vibration performance of a 12-slot 10-pole IPMSM is investigated with the proposed rotor slotting method.