Publication
On-line micro-vibration measurement method for Lorentz-type magnetic-bearing space actuators
Related publications (32)
Modelling and Sensors for Magnetically-Levitated Disc Drives
Juan Patricio Tomás Peralta Fierro
The development of new industrial applications has diverted the focus of research towards compacter and faster rotatory drives. These requirements push the classical ball-bearings of electric motors to the limits in terms of operational lifetime and fricti ...
EPFL2022Long Spin Lifetime in Rare-Earth Single-Atom Magnets at Surfaces
Further miniaturisation of magnetic storage devices requires an advent of new types of magnets, since classical ferromagnetic materials show lack of remanence at nano- and subnanoscale. A single atom can represent the smallest possible bit of information. ...
EPFL2022A geometrically exact model for thin magneto-elastic shells
Pedro Miguel Nunes Pereira de Almeida Reis, Matteo Pezzulla, Dong Yan
We develop a reduced model for hard-magnetic, thin, linear-elastic shells that can be actuated through an external magnetic field, with geometrically exact strain measures. Assuming a reduced kinematics based on the Kirchhoff-Love assumption, we derive a r ...
PERGAMON-ELSEVIER SCIENCE LTD2022Performance and Micro-Vibrations in Magnetic Bearings for Space Actuators
The development of new space missions with novel high-performance and very sensitive payloads for Earth observation or scientific missions has imposed considerably tougher requirements in terms of the satellite's pointing accuracy and stability, and thus o ...
EPFL2021Principles and Test Result of Novel Full Passive Magnetic Levitation Motor with Diamagnetic Disk
This paper proposes a novel full passive magnetic levitation motor without active magnetic suspension. It has a magnetic levitation unit and a motor unit. The Halbach array permanent magnets and a pyrolytic graphite (PG) disk realize the full passive magne ...
IEEE2021Characterization and Verification of Eddy-Current Position Sensing for Magnetic Levitation
Yves Perriard, Sean Thomas, Juan Patricio Tomás Peralta Fierro
Magnetically-levitated drives are compelling in applications where the long-lifetime operation or process chamber encapsulation is a requirement. To exploit these advantages, contactless position sensors are needed to estimate the position of the rotor. Of ...
2021Novel Generalised Notch Filter for Harmonic Vibration Suppression in Magnetic Bearing Systems
Yves Perriard, Douglas Martins Araujo, Leopoldo Rossini, Guzmán Borque Gallego
Magnetic bearings represent an important alternative to conventional ball bearings for applications that require very low noise and vibrations. The absence of contact and friction between rotor and stator parts, combined with the use of active vibration co ...
2021Alternative, Magnetically-Levitated Motor Topologies for High Speed
A slotless magnetically-levitated high speed motor had been designed and build prior to the beginning of this project. This report presents the work done to develop a slotted alternative design to this motor. In this study, the principle of magnetically-le ...
2020Test Bench Construction for the Validation of Rotor Position Measurement in Magnetic Bearings
At LAl, a micro bearingless motor system is being developed, in collaboration with a Swiss company. For proper commissioning, the radial position of the rotor must be continually measured and corrected, so that the rotor can ultimately spin with no contact ...
2020Test Bench Construction for the Validation of Rotor Position Measurement in Magnetic Bearings
At LAI, a micro bearingless motor system is being developed, in collaboration with a Swiss company. For proper commissioning, the radial position of the rotor must be continually measured and corrected, so that the rotor can ultimately spin with no contact ...
2019