introduction: the purpose of this study was to compare the accuracy of the torque wrenches used in different dental implant systems. methods: we evaluated 42 torque wrenches used in different dental clinics in mashhad, iran, using a digital torque meter (mark 10). high (25, 30 and 35 n·cm) and low (15 n·cm) levels of torque were examined. ten tests were performed on each wrench, and the mean va...

Increasingly complex electromagnetic devices require more flexible modelling, and fast and accurate computation of performance parameters. Although two-dimensional analysis provides good approximations, often the physics of the problem requires three-dimensional analysis. Using the Boundary Element Method (BEM) for three-dimensional analysis, now provides unprecedented design opportunities to e...

This paper presents a pulse doubling technique in a 12-pulse ac-dc converter which supplies direct torque controlled motor drives (DTCIMD’s) in order to have better power quality conditions at the point of common coupling. The proposed technique increases the number of rectification pulses without significant changes in the installations and yields in harmonic reduction in both ac and dc sides....

This paper presents a design of pitch controller using Genetic Algorithm (GA) for variable speed wind turbine Doubly Fed Induction Generator (DFIG) . The proposed genetic pitch controller is used to get the proper pitch angle for limiting the mechanical power when the wind speed is greater than the rated wind speed. DFIG is a wound-rotor induction generator where the stator terminals of DFIG ar...

This paper presents a 12 V mechanical torque converting belt-driven integrated starter and generator (BSG) system without DC-DC converter. A micro hybrid electric vehicle (micro HEV) typically uses battery with 12/48 bidirectional converter to satisfy its high starting wide operating speed for generating the required power. In contrast, proposed BSG consists of wound field synchronous machine (...