Abstract
This paper presents the dynamic characteristic analysis of a small sized permanentmagnet (PM) type stepping motor with newly structured claw-poles. First, the motor parameter is derived by PM analyzing torque and back-EMF using the 3-D finite element analysis (FEA) taking account magnetization of PM. Next, the dynamic characteristic of a small sized motor is calculated by magnetic circuit equation coupled with 3-D FEA. Specially, we propose a test method of step response for a small sized PM type stepping motor using a position sensitive detection (PSD) sensor. From the simulation and test results, it is shown that the proposed dynamic characteristic analysis method has usability for a very small sized motors.
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