In this thesis, a proof of concept for a current-source DC-DC converter for powering sensors used in an underwater communications system is presented. The proposed converter steps down an input current of 0.9 A to 0.625 A, while maintaining an output voltage of 24 V and output power of 15 W. The complete steady-state analysis and design of the prop...
Power electronics are a necessity for many types of electrical energy conversions that are required from electricity sources to load devices. Innovation in these devices is typically driven by the need for higher power density, through either higher power or smaller feature sizes. One of the primary bottlenecks to this advancement is failure mechan...
Demand for more environmentally friendly flight has been driving innovation in propulsion systems. HASTECS proposed designs that increase the efficiency and decrease the weight of on-board power components in hybrid propulsion systems.Merging expertise in electrical, chemical and thermal engineering, the EU-funded HASTECS project assessed and optim...
status: published
A study on Integrated gate-commutated thyristors (IGCT) di/dt limiting inductance and RCD-clamp reduction/suppression using plastic module silicon (Si) fast recovery diodes and silicon carbide (SiC) diodes, in Modular Multilevel Converters (MMC). This PhD contains:- Analysis of existing HVDC MMC Submodules.- Assessment of the interest of the IGCT i...
Wide band-gap (WBG) devices enable power converter designs at higher frequency, power density, and efficiency, as compared to silicon-based converters. The coexistence for SiC (Silicon Carbide) and GaN (Gallium Nitride) devices in the ranges 600-900 V motivates a specific study of these components and the development of methods to perform better se...
TU Delft and KEMA laboratories are collaborating to create a Programmable high voltage test source by employing Modular Multilevel Converter MMC which can generate output voltage waveforms of any arbitrary shape. To produce an Impulse waveform of magnitude 250 kV across a capacitive load of 10 nF with a rise time of 1.2 µs as output voltage, each P...
The worldwide adoption of Electric Vehicles (EV) has gained momentum in recent years, with more than 30% of all EVs being sold last year. Additionally, a new trend of 800 V battery architectures has appeared to allow for faster charging than the now common 400 V architectures. Future proof charging topologies should, therefore, be able to provide a...
Up to 5 kW PV installations microinverters are common alternatives for the typical string solar inverters. The main draw back of the technology is the slight higher initial cost, however, a more efficient energy generation can be achieved if one of the PV modules are operated optimally at the maximum power point. This work shows that converters emp...
In the current context of energy and ecological transitions, a multiplication of high-voltage DC buses is observed in several applications, such as Electric Vehicles (EV) and photovoltaic. In parallel, there exist systems that require to be powered directly from the main supply source, like a Pyroswitch for immediate security in the automotive cont...
