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This paper discusses the applicability of SiC MOSFET to high-frequency induction heating applications. In this paper, a 15-kW, 70-kHz SiC MOSFET inverter prototype is constructed to evaluate the performance of the SiC MOSFETs. Power loss breakdown is also conducted from the experimental results. As a results, the inverter prototype has exhibited a power conversion efficiency as high as 98.5% at the...
This paper investigates the effect of demagnetization of the permanent magnets (PM) on the performance of interior permanent magnet motors. In order to remove the individual difference of the motors, several shapes of PMs are prepared, and the experiments are carried out with the same stator. This paper takes into account two types control strategy, V/f constant control and vector control. It is clarified...
This paper discusses an interdisciplinary project to be performed by 3th year bachelor student groups during their last semester. The topic is related to the energy storage in micro dc-grids supplying several electrical drives. The energy storage in the dc-grid is based on the kinetic energy in variable-speed flywheels or in masses performing a linear acceleration-deceleration motion. Such devices...
Gallium nitride (GaN) power semiconductor technology offers a potential for significant performance increase in power electronic converters. This potential cannot be fully exploited if GaN devices are used as drop-in replacement for silicon devices in existing systems. This paper investigates the switching limits influenced by the device output parasitic capacitance and parasitic inductance of the...
In this paper, a Reverse Blocking IGBT is compared with various other combinations of switches and diodes keeping Current Source based Converter application in mind. The devices are tested under Reverse Voltage Commutation, Switch Overlap (turn on at non-zero current but zero voltage), Hard Switching, and Zero Current Switching condition. Test Circuits have been constructed and tested at various voltage...
The recent developments in wide band-gap devices based GaN and SiC is showing a high impact on the PV-inverter technology, which is strongly influenced by efficiency, power density and cost. Besides the high efficiency of PV inverters, also the mechanical size, the compactness and simple structure have an important role in the cost reduction. To increase the efficiency of PV systems, most of solutions...
This paper presents the design and performance evaluation of the digital control adapted to an LLC series resonant dc-to-dc converter operating with wide input and load variations. The main theme of this paper is to highlight the advantage of using the push-pull mode of digital pulse width modulation (DPWM) operation over the complementary mode operation for the implementation of digital control to...
The future development of high performance power electronics will rely increasingly on system level integration, where semiconductor devices are co-packaged with other active and passive components (e.g., gate-drivers, filter capacitors and inductors) into a power module. In view of the widespread electrification of pivotal elements of the energy generation and distribution infrastructure (e.g., smart-grids,...
This paper provides a comparison of high power semiconductor devices in 5MW-class Permanent Magnet Synchronous Generator (PMSG) Medium Voltage (MV) wind turbines. High power semiconductor devices of press-pack type IGCT, module type IGBT, press-pack type IEGT, and press-pack type IGBT of both 4.5kV and 6.5kV are considered in this paper. Benchmarking is performed based on neutral point clamped 3-level...
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