3-D Soft Magnetic Composite Core Superior in the Downsizing of Motors, The 20th MAGDA Conference in Pacific Asia, pp.355-360, Nov. 14-16, 2011, Kaohsiung Taiwan
Abstract: This paper clarifies the characteristics of soft magnetic composite (SMC) core superior in the downsizing of motors.　First, This paper clarifies the optimal punch control in the press forming process for an SMC core of a DC motor　to give a good B-H characteristic and a good mechanical strength. Next, SMC core for DC motor is developed using　the optimized press forming method. This paper introduces overhangs in the armature SMC core. It increases the airgap　flux per pole by about 14%. Moreover, it is shown experimentally that the efficiency of the motor is improved　from 55% of the DC motor made of laminated core to 60%.