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Model Based Optimization of EMC Input Filters
(2008)2008 IEEE 11th Workshop on Control and Modeling for Power ElectronicsInput filters of power converters for compliance with regulatory electromagnetic compatibility (EMC) standards are often over-dimensioned in practice due to a non-optimal selection of number of filter stages and/or the lack of solid volumetric models of the inductor cores. This paper presents a systematic filter design approach based on a specific filter attenuation requirement and volumetric component parameters. It is shown that a minimal ...Conference Paper -
Magnetically Levitated Slice Motors - An Overview
(2009)2009 IEEE Energy Conversion Congress and ExpositionThis publication gives a comprehensive overview over different concepts of magnetically levitated motors with slice-shaped rotors that differ in their construction and the way the bearing and drive forces are created. After a description of the technical principle of the topologies the motor concepts are then compared by different criteria such as the acceleration behavior, the compactness and the complexity of the control. The qualitative ...Conference Paper -
A Comparison of Separated and Combined Winding Concepts for Bearingless Centrifugal Pumps
(2009)Journal of Power ElectronicsConference Paper -
Principles of magnetic levitation force and motor torque generation by superposition of harmonics in bearingless brushless motors
(2009)Proceedings of the ... Annual Conference of the IEEE Industrial Electronics Society ~ Industrial Electronics, 2009. IECON '09. 35th Annual Conference of IEEEConference Paper -
Design of a novel bearingless permanent magnet motor for bioreactor applications
(2009)Proceedings of the ... Annual Conference of the IEEE Industrial Electronics Society ~ Industrial Electronics, 2009. IECON '09. 35th Annual Conference of IEEEConference Paper -
Scaling of Magnetically Levitated Homopolar Hollow-Shaft Machines
(2013)IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS), 2013 : 22 - 25 April 2013, Kitakyushu, JapanConference Paper -
Comparison of 2- and 3-Phase Bearingless Slice Motor Concepts
(2009)Journal of System Design and DynamicsConference Paper -
Advanced modulation scheme for three-phase three-switch buck-type PWM rectifier preventing mains current distortion originating from sliding input filter capacitor voltage intersections
(2003)Conference proceedings / PESCO’03, 2003 IEEE 34th Annual Power Electronics Specialists ConferenceConference Paper -
Rotor Position Measurement for a Magnetically Levitated 500'000 rpm Permanent Magnet Machine
(2011)2011 IEEE Energy Conversion Congress and ExpositionIn this paper, we propose a DSP or FPGA based transversal flux eddy current sensor position measurement technique for rotors in high-speed electrical drives using active magnetic bearings. Compared to the state-of-the-art demodulation technique using analog mixers or rectifiers, the published method shows a lower circuit complexity and allows fulfilling the high bandwidth needs of highly dynamic systems as well as the improved accuracy ...Conference Paper -
Topology evaluation of slotless bearingless motors with toroidal windings
(2014)2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)In this paper, different winding and magnet topologies are analyzed and compared for a slotless bearingless disk drive with toroidal windings. Basis of the studies is a six phase motor with a diametrically magnetized one-pole-pair rotor. Due to the absence of mechanical bearings, the motor is suitable for applications with high purity and special chemical demands. Its slotless design results in low losses even at high rotational speeds. ...Conference Paper