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SiC power semiconductors in HEVs
(2009)2009 35th Annual Conference of IEEE Industrial ElectronicsConference Paper -
Closed Loop Input Current Control of a Hybrid 12-Pulse Rectifier
(2008)2008 IEEE Power Electronics Specialists ConferenceConference Paper -
Design and Control of an Active Reset Circuit for Pulse Transformers
(2008)2008 IEEE International Power Modulators and High-Voltage ConferenceIn pulse modulators applying pulse transformers reset circuits are used to achieve optimal utilization of the core material, which results in lower costs, downsized pulse transformer/system volume and therefore in an improved pulse behavior due to the smaller parasitics. Because of its simplicity the most common method to reset the core is a dc reset circuit, where a dc current is used to premagnetize the core. However, the dc reset circuit ...Conference Paper -
Solid State Modulator for Plasma Channel Drilling
(2008)2008 IEEE International Power Modulators and High-Voltage ConferenceIn addition to conventional mechanical and explosive drilling and demolition, drilling based on the use of pulsed electric power has been investigated intensively and recently commercial applications begin to emerge. With this method, the demolition of the rock is either performed by sonic impulses due to pulse discharges in water or by discharges directly through the rock, called plasma channel drilling (PCD). Due to the direct impact, ...Conference Paper -
Analytic Design Method for (Integrated-) Transformers of Resonant Converters Using Extended Fundamental Frequency Analysis
(2005)Proceedings. The 2005 International Power Electronics Conference, IPEC-NiigataConference Paper -
Optimal design of a two-winding inductor bouncer circuit
(2009)2009 IEEE Pulsed Power ConferenceIn many pulsed power applications the flatness of the output pulse is an important characteristic to enable proper system operation, whereas a pulse flatness within less than a few percent has to be achieved. In power modulators based on capacitor discharge this voltage droop is mainly defined by the input capacitance. In order to overcome this problem, in power modulators systems, compensation circuits are added, whereby in spite of a ...Conference Paper -
Balancing circuit for a 5kV/50ns pulsed power switch based on SiC-JFET Super Cascode
(2009)2009 IEEE Pulsed Power ConferenceIn many pulse power applications there is a trend to modulators based on semiconductor technology. For these modulators high voltage and high current semiconductor switches are required in order to achieve a high pulsed power. Therefore, often high power IGBT modules or IGCT devices are used. Since these devices are based on bipolar technology the switching speed is limited and the switching losses are higher. In contrast to bipolar devices ...Conference Paper -
Transient behaviour of solid state modulators with Matrix Transformers
(2009)2009 IEEE Pulsed Power ConferenceSolid state modulators based on pulse transformer offer the advantage, that with the turns ratio of the transformer, the primary voltage ideally could be adapted to the available switch technology and a series connection of switches could be avoided. For increasing the power level several semiconductor switches must be connected in parallel and a balancing between the different switches must be guaranteed. There, the Matrix Transformer ...Conference Paper -
5kV/200ns Pulsed Power Switch based on a SiC-JFET Super Cascode
(2008)Proceedings of the 2008 IEEE International Power Modulators and High-Voltage ConferenceIn many pulse power applications there is a trend to modulators based on semiconductor technology. For these modulators high voltage and high current semiconductor switches are required in order to achieve a high pulsed power. Therefore, often high power IGBT modules or IGCT devices are used. Since these devices are based on bipolar technology the switching speed is limited and the switching losses are higher. In contrast to bipolar devices ...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