Modular Power Electronic Converters in the Power Range 1 to 10 kW by Pawel Klimczak Aalborg University, Denmark Institute of Energy Technology

Abstract
Thanks to CO2 emission reduction policies and increasing prices of fossil fuels a
significant growth in field of sustainable energy sources (SES) is being observed
during last decade. A government support and take-off projects in Europe and US
shall ensure an increasing trend in future too. Some of SES based plants , like
hydro-, geothermal-, biofuel-plants, use synchronous generators directly connected
to the grid. But some other SES technologies, like fuel cell or photovoltaic, require
a power electronic converter between the energy source and the load or the grid.
Work presented in this thesis concentrates on dc-dc non-isolated converters suitable
for high voltage gain applications, like uninterruptible power supply (UPS) and
some of sustainable energy sources. A special attention is on reduction of power
losses and efficiency improvements in non-isolated dc-dc step-up converters.
DOWNLOAD FULL THESIS
http://www.mediafire.com/?8ammjw81mer0bl0

Non-isolated Single Phase Uninterruptible Power Supply (UPS) System Muhammad Aamir and Hee-Jun Kim Dept. of Electronics, Electrical, Control, and Instrumentation Engineering, Hanyang University, Korea

Non-isolated Single Phase Uninterruptible Power Supply (UPS) System Muhammad Aamir and Hee-Jun Kim Dept. of Electronics, Electrical, Control, and Instrumentation Engineering, Hanyang University, Korea
Abstract-- In this paper, a high performance single phase
transformer-less online uninterruptable power supply (UPS)
is proposed. The use of the bidirectional buck-boost
converter with high conversion ratio not only reduces the
number of batteries but also ensures a transformer-less
system. The rectifier has capability of power factor
correction and provides regulated DC link voltage whereas
the inverter provides a regulated sinusoidal output voltage
to the load. In order to control the transient effect, efficient
control scheme is adopted in the system. The overall
efficiency of the system is improved with significant
reduction in size and weight of the system due to decrease
number of batteries. Qualitative analysis and experimental
results obtained with a 500VA prototype shows a normal
efficiency of over 94% and an input power factor of over 99%.
DOWNLOAD FULL PAPER
http://www.mediafire.com/?w2twja6ndyui660

Eaton's PSEC - Harmonics

METREL MI 2792 PowerQ4 Plus ANALIZADOR ENERGIA TRIFASICO

EEWeb Pulse - Volume 109 Interview with Steve Grodt – Marketing Manager at Chroma; NASA’s SpaceShop: Expressway for Ideas; The End of Moore’s Law?; VHDL101 – Part 5: Tick Tock, Processing Clocks; RTZ – Return to Zero Comic

issuu.com/eeweb/docs/volume_109_-_chroma