A Novel Slotless Halbach-Array Permanent-Magnet Brushless DC Motor for Spacecraft Applications

作者：Praveen R P^*; Ravichandran M H; Achari V T Sadasivan; Raj V P Jagathy; Madhu G; Bindu G R

来源：IEEE Transactions on Industrial Electronics, 2012, 59(9): 3553-3560.

DOI：10.1109/TIE.2011.2161058

• Brushless dc motor
• coreless
• enclosed rotor
• finite element analysis
• Halbach array
• zero cogging

This paper presents the design and analysis of a novel machine family-the enclosed-rotor Halbach-array permanent-magnet brushless dcmotors for spacecraft applications. The initial design, selection of major parameters, and air-gap magnetic flux density are estimated using the analytical model of the machine. The proportion of the Halbach array in the machine is optimized using finite element analysis to obtain a near-trapezoidal flux pattern. The machine is found to provide uniform air-gap flux density along the radius, thus avoiding circulating currents in stator conductors and thereby reducing torque ripple. Furthermore, the design is validated with experimental results on a fabricated machine and is found to suit the design requirements of critical spacecraft applications.

• 出版日期2012-9