Jagathy Raj, V P; Praveen, R P; Ravichandran, M H; Sadasivan Achari, V T; Madhu, G; Bindu, G R(IEEE, October 7, 2010)
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Abstract:
This paper presents the design and analysis of a novel
machine family of Siotiess Permanent Magnet Brushless DC
motors (PMBLDC) for precise positioning applications of
spacecrafts. 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 was optimized using FE to obtain near trapezoidal flux
pattern. The novel machine topology is found to deliver high
torque density, high efficiency, zero cogging torque, better
positional stability, high torque to inertia ratio and zero magnetic
stiction suiting space requirements. The machine provides
uniform air gap flux density along the radius thus avoiding
circulating currents in stator conductors and hence reducing
torque ripple
Description:
Communication Control and Computing Technologies (ICCCCT), 2010 IEEE International Conference on