Hubert Mitterhofer, Gerald Jungmayr, Wolfgang Amrhein,
"Coaxial Tilt Damping Coil with Additional Active Actuation Capabilities"
: IEMDC 2017, IEEE International Electric Machines & Drives Conference, Miami, Florida, USA, 5-2017
Original Titel:
Coaxial Tilt Damping Coil with Additional Active Actuation Capabilities
Sprache des Titels:
Englisch
Original Buchtitel:
IEMDC 2017, IEEE International Electric Machines & Drives Conference, Miami, Florida, USA
Original Kurzfassung:
This work presents a tilt stabilization coil inside an exemplary high speed bearingless disk drive. The coil is based on the passive, electrodynamic ?Null-Flux? principle where there are no coil currents and, thus, no losses when the rotor is non-deflected during rotation. The proposed conductor structure is then used as a means of active actuation on the rotor by energizing the coil actively for first producing tilt torque. Modifying the structure geometrically into multiple, coaxial conductor loops which are energized with currents in the same or in equal direction then allows producing additional axial forces and tilt torque with multiple degrees of freedom, depending on the coil design. Simulation and measurement at prototype drives demonstrate the functioning of both, the passive stabilization and the active actuation principles.