Analytical Model of Eddy Currents in a Reaction Sphere Actuator
- 9 January 2014
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Magnetics
- Vol. 50 (6), 1-7
- https://doi.org/10.1109/tmag.2014.2298215
Abstract
A recently proposed technique to control the satellite attitude using a magnetically levitated sphere requires the development of suitable models of its dynamics. One of the phenomena that can affect motion of the system are eddy currents induced in the stator of the actuator due to time variable magnetic field generated by rotational motion of a permanent magnet rotor. We present an analytical model of the eddy currents for the actuator with eight-pole rotor. The model is derived using a second-order vector potential-based approach, and the solution is obtained in terms of spherical harmonic functions. This model allows us to study rotor rotations with constant angular frequency around an axis arbitrarily oriented with respect to both rotor and stator of the reaction sphere actuator.Keywords
This publication has 9 references indexed in Scilit:
- Design and control of a three degree-of-freedom permanent magnet spherical actuatorSensors and Actuators A: Physical, 2012
- Force and Torque Analytical Models of a Reaction Sphere Actuator Based on Spherical Harmonic Rotation and DecompositionIEEE/ASME Transactions on Mechatronics, 2012
- MarcoPolo-R near earth asteroid sample return missionExperimental Astronomy, 2011
- Analytical and experimental investigation on the magnetic field and torque of a permanent magnet spherical actuatorIEEE/ASME Transactions on Mechatronics, 2006
- Design and control of a novel spherical permanent magnet actuator with three degrees of freedomIEEE/ASME Transactions on Mechatronics, 2003
- Summary of NASDA's ETS-VII robot satellite missionJournal of Robotics and Mechatronics, 2000
- Fast computation, rotation, and comparison of low resolution spherical harmonic molecular surfacesJournal of Computational Chemistry, 1999
- Analytical determination of eddy currents in a hollow sphere excited by an arbitrary dipoleIEEE Transactions on Magnetics, 1998
- Spacecraft Dynamics and ControlPublished by Cambridge University Press (CUP) ,1997