抄録
The Ministry of Economy, Trade and Industry of Japan reported that about 53% or more of the total electric power generated in Japan was consuming in motors. There are several kinds of motors, however induction motors are most popularly utilizing in factories. Therefore reducing losses and improving efficiency of the common induction motors are effective for saving energy. In this paper we focused on a synchronous induction motor (IM/PM hybrid motor), which permanent magnets are embedded in the induction machine's rotor. This machine can improve the staring characteristic in comparison with a synchronous permanent magnet motor and torque characteristic and efficiency at synchronous operation in comparison with an induction motor. The torque characteristic of IM/PM hybrid motors are numerically analyzed with the finite element method and compared with that of IM. The results show that the arrangement of the permanent magnets is very important to improve whole torque characteristics.
