Optimal Design and Control of a Spoke-Type IPM Motor with Asymmetric Flux Barriers to Improve Torque Density

This paper studies the optimal design and control scheme of a spoke-type interior permanent magnet motor (SIPM). An asymmetric rotor structure with flux barriers is designed to improve torque density SIPM. The method improves by approximating maximum value magnetic reluctance torque, wherein components are separated frozen permeability (FPM) evaluate contribution. does not increase amount magnets or size, reduces weight while increasing output. Firstly, applied in 27/4 SIPM illustrate principle. Further, optimizing width barriers, based on finite-element analyze (FEA), higher obtained. Compared basic model, output model both increased. Based an angle scanning proposed orient vector dq-axis. Then, mathematical established, per ampere (MTPA) system designed. conventional system, has (TPA), which shows that can give full play advantages high density.