Now showing items 41-50 of 3320
Projeto automático de controlador de velocidade sem sensor mecânico para motores de indução trifásicos
(Universidade Federal de Santa MariaBREngenharia ElétricaUFSMPrograma de Pós-Graduação em Engenharia Elétrica, 2008-08-27)
This works proposes parameters estimation algorithm to auto-tune the control laws of a speed sensorless servo. The identification process of the electrical and mechanical parameters is based on recursive least squares ...
Variable speed refrigeration system with HPF input rectifier stage
This paper is based on the analysis and implementation of a new drive system applied to refrigeration systems, complying with the restrictions imposed by the IEC standards (Harmonic/Flicker/EMI-Electromagnetic Interference ...
Embedded DSP-Based Compact Fuzzy System and Its Application for Induction-Motor V/f Speed Control
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2011)
This paper presents a compact embedded fuzzy system for three-phase induction-motor scalar speed control. The control strategy consists in keeping constant the voltage-frequency ratio of the induction-motor supply source. ...
Physical and physiological quality of soybean seeds at three speeds of the harvester
(Univ Federal Campina Grande, 2017-03-01)
The mechanized harvesting of soybean is a fundamental tool in the production process of this crop and, if not performed properly, it can result in severe mechanical damage to the seeds, causing significant losses at harvest, ...
A Deadbeat Active and Reactive Power Control for Doubly Fed Induction Generator
(Taylor & Francis IncPhiladelphiaEUA, 2010)
An ice machine adapted into an autonomous photovoltaic system without batteries using a variable-speed drive
(JOHN WILEY & SONS LTD, 2010)
The adaptation of a commercially available ice machine for autonomous photovoltaic operation without batteries is presented. In this adaptation a 1040 W(p) photovoltaic array directly feeds a variable-speed drive and a 24 ...
Study of the control structure of a small wind turbine with permanent magnet synchronous generator
This paper presents the analysis of the two control structures used in wind generation systems with permanent magnet synchronous generators, variable speed and fixed pitch, to determine which structure is most appropriate ...