The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper a non-isolating high voltage (800 V) bidirectional DCDC-converter with a so far unreached efficiency of up to 99.7 % is built and tested in detail. In order to reach this goal, a SiC-MOSFET half bridge is switched at its technical maximum switching speed (200 V/ns) using an extremely low inductive switching cell. This fast and low loss switching cell is attached to a large and highly...
Fuel cells in aircraft applications are gaining more and more interest because of higher possible efficiency and increasing air pollution standards. A necessary supplement is an efficient, lightweight and reliable DC/DC-converter to adjust the weak fuel cell characteristic to the voltage level of buffer batteries and drive inverters. Cosmic radiation, condensation, strict EMIlimits and significantly...
Low conduction losses are one technical advantage of SiC-MOSFETs compared to conventional IGBTs but this benefit is generally not enough to justify the much higher wafer costs per mm2. The other very important advantage is the lower switching losses. A conventional power module design with externally connected gate drivers cannot even get into the region of what SiC-MOSFETs are capable to perform...
This paper describes a DC-link discharge device that is smaller and cheaper than conventional resistor or PTC-based solutions. The basic idea is to use the switching element (IGBT, Mosfet), that is usually controlling the PTC or resistor, in a linear mode and decrease the maximum power by shifting the discharge curve from an uncontrolled square voltage dependent curve to a roughly constant power characteristic...
This paper describes the power stage of a non-isolated unidirectional 400 V 100 kW DCDC converter for fuel cell vehicles that reaches a switching frequency of 150 kHz with industry power modules. The power modules are equipped with custom made DCB-substrates assembled with a combination of fast 600 V super-junction Si-Mosfets and SiC-Schottky Diodes. For all other components like drivers, current...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.