Design and Analysis of In-Drum Outer Rotor BLDC Motor for Eddy Current Separator

Abstract

I n this study, a novel In-Drum Brushless Direct Current ID-BLDC motor is proposed to Eddy Current Separator ECS which separates nonferrous metals from waste. The ECS’s separation efficiency depends on magnetic drum speed. ID-BLDC motor is designed with outer rotor structure and placed in ECS magnetic drum in order to improve separation efficiency. The magnetic drum is directly driven by this motor because it doesn’t require coupling mechanisms. It has very simple structure since no rotor windings, brushes and bracelets. The ID-BLDC motor has high reliability, high efficiency and high power-to-volume ratio. Proposed motor has 8 poles, 3 phases, 373 W 0.5 HP and 1750 rpm rated speed. Output parameters are calculated for full load and verified by Finite Element Analysis FEA under the over load, full load, half load, quarter load and no load conditions for transient and steady state

Keywords

• brushless motors
• outer rotor motors
• permanent magnet motors
• finite element analysis fea
• eddy current separator