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Novel Integrated Bearingless Hollow-Shaft Drive
(2006)Conference record of the 2006 IEEE Industry Applications Conference, 41st IAS annual meeting. 1Conference Paper -
Efficient Calculation of Non-Orthogonal Partial Elements for the PEEC Method
(2009)IEEE Transactions on MagneticsFor various electrical interconnect and EMC problems, the partial element equivalent circuit (PEEC) method has proven to be a valid and fast solution method of the electrical field integral equation in the time as well as the frequency domain. Therefore, PEEC has become a multipurpose full-wave method, especially suited for the solution of combined circuit and EM problems, as found, for instance, on printed circuit board layouts, power ...Conference Paper -
Efficiency Optimization of a 100-W, 500 000-rpm Permanent-Magnet Machine Including Air Friction Losses
(2007)2007 IEEE Industry Applications Annual MeetingThis paper proposes a method for the efficiency optimization of ultra-high-speed permanent-magnet machines. Analytical methods are applied for the modeling of the machine that is equipped with a diametrically magnetized rotor and a slotless stator. The outer dimensions of the machine are design constraints, and the internal dimensioning is optimized for minimum losses. The air friction losses are taken into account in addition to the usual ...Conference Paper -
Optimization of a wearable power system
(2008)2008 IEEE 11th Workshop on Control and Modeling for Power ElectronicsIn this paper the optimization of wearable power system comprising of an IC engine, motor/generator, inverter/rectifier, Li-battery pack, DC/DC converters, and controller is performed. The Wearable Power System must have the capability to supply an average 20 W for 4 days with peak power of 200 W and have a system weight less then 4 kg. The main objectives are to select the engine, fuel and battery type, to match the weight of fuel and ...Conference Paper -
A miniature, 500 000 rpm, electrically driven turbocompressor
(2009)2009 IEEE Energy Conversion Congress and ExpositionThe trend in compressors for fuel cells, heat pumps, aerospace and automotive heating, ventilation and air conditioning systems, is towards ultra-compact size and high efficiency. This can be achieved by using turbocompressors instead of scroll, lobe or screw compressors, increasing the rotational speed and employing new electrical drive system technology and materials. This paper presents a miniature, electrically driven two stage ...Conference Paper -
A Novel Concept for Mains Voltage Proportional Input Current Shaping of a VIENNA Rectifier Eliminating Controller Multipliers. Part I - Basic Theoretical Considerations and Experimental Verification
(2001)Proceedings of the 16th IEEE Applied Power Electronics Conference (APEC 2001)Conference Paper -
A modified direct power control strategy allowing the connection of three-phase inverter to the grid through LCL filters
(2005)Conference Record of the 2005 IEEE Industry Applications Conference Fortieth IAS Annual MeetingThis paper proposes a novel approach to adapt the conventional direct power control (DPC) for high power applications with a third order LCL filter. The strong resonance present in the LCL filter is damped with additional effort in the system control. The application of DPC to the control of three-phase voltage source inverter (VSI) connected to the grid through a LCL filter has not yet been considered. An active damping strategy for the ...Conference Paper -
Output Ripple Reduction of an Automotive Multi-Phase Bi-Directional DC-DC Converter
(2009)2009 IEEE Energy Conversion Congress and ExpositionBi-directional dc-dc converters for automotive applications typically are limited to generate only a small voltage ripple, especially when a ultra-capacitor with a limited ripple current capability is interfaced by the converter. Thus, to minimize the ripple quantities and the converter volume at the same time, interleaved multi-phase dc-dc converters are utilized. However, tolerances of the buck+boost inductors of the interleaved phases ...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 -
Efficient partial element calculation and the extension to cylindrical elements for the PEEC method
(2008)2008 IEEE 11th Workshop on Control and Modeling for Power ElectronicsFor various electrical interconnect and EMC problems, the Partial Element Equivalent Circuit (PEEC) method has proven to be a valid and fast solution method of the electrical field integral equation in the time as well as the frequency domain. Therefore, PEEC has become a multi-purpose full-wave simulation method, especially suited for the solution of combined circuit and EM problems, as found on printed circuit board layouts, power ...Conference Paper