Abstract
According to indicators, the New V-Rotor Permanent Magnet Motor (NVRPM) for compressors with a rated power of 22 kW and a rated speed of 3000 rpm is optimally designed. Because of the large number of permanent magnets in the V-type PM motor, the magnetic leakage between rotor poles will increase, and its air gap magnetic field contains large harmonic components, which is easy to increase the loss and reduce the efficiency. The structure of the initial V-shaped rotor was optimized by adding multiple air slots and cosine non-uniform air gaps on the rotor surface. Through the finite element simulation of electromagnetic characteristics of NVRPM, it is proved that the improvement of the new motor structure can reduce the loss, weaken the cogging torque, and decrease the torque ripple, and the simulation efficiency is up to 96%, and its operation area is wide and efficient. Finally, the results show that the optimization design of the NVRPM structure is feasible.
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