FE Analysis and CAD of Sandwiched Axial-Flux Permanent Magnet Brushless dc Motor (original) (raw)

Abstract

ABSTRACT A generalized design procedure for a 70 W, 350 rpm axial-flux permanent magnet brushless DC (PM BLDC) motor having stator sandwiched between two permanent magnet rotors is presented. Based on the expressions for the torque and back emf, the output equation for an axial-flux PM BLDC motor, is derived. The optimized ratio of outer diameter to the inner diameter is used to derive the sizing equation. Using the sizing equations, a computer aided design (CAD) program which involves two self-corrective loops - one for the efficiency and the other for the airgap flux density - is developed.

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