Results 11 to 20 of about 24,541 (310)

A New Bridgeless High Step-up Voltage Gain PFC Converter with Reduced Conduction Losses and Low Voltage Stress

Energies, 2018
Bridgeless power factor correction (PFC) converters have a reduced number of semiconductors in the current flowing path, contributing to low conduction losses.
Xiang Lin, Faqiang Wang, Herbert H. C. Iu   +2 more
doaj   +2 more sources

Large volume buildings: Calculations of heat losses due to conduction

Journal of Civil Engineering and Management, 2006
The paper covers the questions associated with heating of large‐volume buildings using gas‐fired air heaters. Particular attention is given to horizontal and vertical distribution of interior temperatures.
Iwona Polarczyk, Pawel Malinowski
doaj   +2 more sources

Issues Concerning the Mechanisms of Bone Conduction

Audiology Research
Air and bone conduction thresholds are used to differentiate between conductive and sensori-neural hearing losses because bone conduction is thought to bypass the conductive apparatus, directly activating the inner ear.
Miriam Geal-Dor, Cahtia Adelman, Haim Sohmer   +2 more
doaj   +2 more sources

Modeling of Power Losses in High-Power Motor Drives [PDF]

, 2023
The efficiency of the system decreases with increasing switching frequency in high-power density industrial driving applications. In order to increase the system efficiency, reliability, and power quality in a high-power drive system, power losses are ...
Gülbahçe, Mehmet Onur, Recep Tayyip Odemis, Ödemiş, Recep Tayyip, Kağıt, Ebrar, Kagit, Ebrar, Mehmet Onur Gulbahce, Ebrar Kagit   +6 more
core   +1 more source

Modeling Inverter Losses for Circuit Simulation [PDF]

, 2004
Transformer-like inverter models can represent a very good alternative to common switch-diode models for simulation, reducing convergence problems and/or calculation time.
Scapino, Federico, Fratta, Antonino, F. Scapino, A. Fratta   +3 more
core   +1 more source

Losses estimation method by simulation for the Modular Multilevel Converter [PDF]

, 2015
The modular multilevel converter (MMC) is the most promising solution to connect HVDC grids to a HVAC one. The installation of new equipment in the HVDC transmission systems requires an economic study where the power losses play an important role.
COLAS, Frédéric, FREYTES, Julian, Julian Freytes, Frederic Colas, Francois Gruson, GUILLAUD, Xavier, DELARUE, Philippe, Philippe Delarue, Xavier Guillaud, GRUSON, Francois   +9 more
core   +1 more source

CONDUCTIVE HEARING LOSS IN BIGHORN SHEEP [PDF]

Journal of Wildlife Diseases, 1995
In January 1993 we simulated a conductive hearing loss in three Mexican bighorn sheep (Ovis canadensis mexicana) by placing bone wax or saline solution in their ear canals. Our objective was to test whether lesions of the external auditory canal caused by psoroptic mites (Psoroptes ovis) may lead to conductive hearing loss in bighorn sheep. We assessed
Norrix, L. W., Deyoung, D. W., Krausman, P. R., Etchberger, Rich Carl, Glattke, T. J.   +4 more
openaire   +3 more sources

Hybrid Duty Ratio Phase-Shift Modulation for a Si + SiC Neutral-Point-Clamped Dual-Active-Bridge Converter

IEEE Access, 2023
The neutral-point-clamped (NPC) dual-active-bridge (DAB) converter with hybrid semiconductors (Si and SiC devices) is a promising topology for high-power energy storage systems.
Jiaxin Dong, Josep Pou, Xinze Li, Suvajit Mukherjee, Amit K. Gupta, Yu Zeng   +5 more
doaj   +1 more source

Instantaneous conduction and switching losses in two-level voltage source inverters [PDF]

, 2017
A mathematical model is derived which allows to compute instantaneously the conduction and switching losses in two-level voltage source inverters (2L-VSIs) regardless of the employed modulation scheme.
PERINI, ROBERTO, Hackl, Christoph M., Roberto Perini, Christoph M. Hackl, FAKHARMANESH, MAHDI, Mahdi Fakharmanesh   +5 more
core   +1 more source

Experimental Evaluation of Dead Time Reverse Conduction Losses in Motor Drives Applications

, 2022
The paper deals with the dead-time impact on the reverse conduction of low-voltage GaN FETs in inverter topology for motor control applications. The current variation in AC motor drive leads to a different dead-time losses mechanism compared to the DC-DC
Palma M., Mandrile F., Barba V., Musumeci S.   +3 more
core   +1 more source