Development Of Disc Rotor Type Permanent Magnet Stepper Motor

Abstract

Disc rotor type stepper motor is rece iving significant attention from industries in the last decade. Stepper motor may be divided into two major groups (1) With permanent magnet (2) Without permanent magnet. From these generally four Stepper mo tor are used such as variable reluctance stepper motor, permanent magnet stepper motor, hybrid Stepper Motor, and disc rotor type permanent magnet stepper motor. The technology for Disc rotor permanent magnet s tepper motor is unknown. This motor offer many advantages such as higher torque at high speed, high torque to weight ratio – as rotor is compact compared to conventional stepper motor, v ery low moment of inert ia – due to disc magnet rotor, high torque to inertia ratio – as inertia is low, low power consumption, no iron structure is there in the roto r and also with SiFe laminations in the stator, eddy current losses are minimized, Disc magnet stepper motor are suitable for high performance high volume application s such as computer peripherals, robotics, CNC machine. They are extremely reliable and compact having better dynamic performance than other stepper motors. Although the design principles of the machine are available as concatenation of many different sources, the need for a unified, step -by-step design procedure from first principles of electromagnetic is an absolute requirement. The project present design and modelling of disc rotor type stepper motor and also present 2D finite element analysis stator segment and 3D analysis of complete Disc rotor type stepper motor. Complete design processed is final verified by finite elements. Reports also present torque angle profile and inductance profile is calculated using FEM analysis.