http://arthra.ugal.ro/handle/20.500.14043/25240 The Annals of "Dunarea de Jos" University of Galati. Fascicle VIII: Tribology 2026-04-07T18:54:08Z http://arthra.ugal.ro/handle/20.500.14043/27959 Calculul și construcția schimbătoarelor de căldură frigorifice Iosifescu, Cristian Constantin 2018-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/25247 Bending of Thin Walled Pipes Using the Heat Realised by Friction Tadic, Branko; Marjanovic, Nenad; Nedic, Bogdan This paper considers appliance of heat generated by friction to relieve deformation of light metals, having as example of bending thin walled copper pipes. Based on numerous, primarily experiment analysis the conclusions have been applied for designing a machine for bending of thin walled copper pipes having small bend radius. The machine’s design is relatively simple, but it provides realisation of needed temperatures within required narrow area. Large number of tests has shown the reliability of suggested methodology. THE ANNALS OF UNIVERSITY “DUNĂREA DE JOS “ OF GALAŢI FASCICLE VIII, XII, 2006, ISSN 1221-4590 TRIBOLOGY 2006-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/25248 Overview on the Implementation of Tree Test Methods for Conformity Assessment of Fluids Rîpă, Minodora; Deleanu, Lorena; Chiculiță, Simona This paper presents three test methods for conformity assessment of technical fluids, all included in international, European and Romanian standards and their relevance for work security and health. THE ANNALS OF UNIVERSITY “DUNĂREA DE JOS “ OF GALAŢI FASCICLE VIII, 2006, ISSN 1221-4590 TRIBOLOGY 2006-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/24881 Simple Approach for Induction Motor Control Using Reconfigurable Hardware Imecs, Maria; Incze I., Ioan; Szabó, Csaba The paper deals with rotor-field-oriented vector control structures for the induction motor drives fed by the so-called tandem frequency converter. It is composed of two different types of DC-link converters connected in parallel arrangement. The larger-power one has current-source character and is operating synchronized in time and in amplitude with the stator currents. The other one has voltage-source character and it is the actuator of the motor control system. The drive is able to run also with partial-failed tandem converter, if the control strategy corresponds to the actual operating mode. A reconfigurable hardware implemented in configurable logic cells ensures the changing of the vector-control structure. The proposed control schemes were tested by simulation based on Matlab-Simulink model. The Annals of "Dunarea de Jos" University of Galati Fascicle III, 2002 2002-01-01T00:00:00Z