Génie électrique
61 documents à télécharger gratuitement
Cours, examens, TD, TP et exercices de génie électrique. Thèmes couverts : électrotechnique, machines électriques, transformateur, puissance.
The IMfinity® product catalogue elaborates on high-efficiency asynchronous three-phase motors classified into IE2, IE3, IE4, and Non-IE categories for variable and fixed speed operations. Designed for compatibility with both direct power supply and variable speed drives, these motors comply with stringent energy regulations in Europe, North America, and globally, ensuring superior performance and energy efficiency. The document also provides technical details on construction, dimensions, installation, maintenance, and environmental considerations to guarantee durability and adaptability acr...
This document details the technical specifications and features of the Delphi series of three-phase asynchronous electric motors, manufactured by Motive S.r.l. It outlines the design, performance metrics, construction standards, and energy efficiency classifications of these motors. The catalog provides details about thermal, mechanical, and electrical features, focusing on aspects like ventilation, insulation class, and special adaptations for high-temperature environments. Additionally, it includes compliance with international standards, efficiency ratings (IE2 and IE3), and suitability...
This document details the specifications and applications of the SH-SG series asynchronous motors, covering standard and high-performance models with various power ratings, mounting configurations, and protection classes. These motors are suitable for integration with vector control drives such as the 650/650V series, offering features like high efficiency, low noise, IP55 protection, and compliance with international standards (IEC, NEMA). Key methodologies include optimizing motor performance for sustained operation and compatibility with advanced control applications. The document also i...
This document delves into DC/DC conversion through choppers. It explores different configurations such as series, parallel, and reversible choppers, providing detailed insights into their principles of operation, control mechanisms, and application scenarios. The series chopper functions as a voltage step-down device (Buck converter), while the parallel version enables voltage step-up operations (Boost converter). Reversible choppers are presented for facilitating bi-directional power flow, including current and voltage reversals, applicable in DC motor drives and regenerative braking syste...
This document provides an in-depth analysis of DC-DC converters, commonly referred to as choppers. It explains various types such as series choppers (buck converters), parallel choppers (boost converters), and reversible choppers, focusing on their structures, principles of operation, and applications. Series choppers reduce the output voltage below the source voltage, while parallel choppers increase the output voltage. The document also discusses reversible choppers, which combine the functionality of buck and boost converters for applications requiring bidirectional power flow. Simplifie...
This document focuses on the study of a chopper circuit feeding an inductive load. Key concepts include determining the function of a diode in the circuit, analyzing the current and voltage waveforms, calculating the average voltage and current, and understanding parameters like ripple current. Essential parameters such as switching frequency and duty cycle are derived, and the influence of circuit components on ripple reduction is discussed. Mathematical expressions are provided for clarity of the analysis.
This document focuses on the operational principles, mathematical derivations, and practical analysis of DC/DC converters. Through three exercises, it explores converter types such as buck, boost, and series converters, analyzing parameters like current ripple, voltage variations, and efficiency. Core methodologies include deriving expressions for current and voltage during different phases, determining ripple magnitudes, and solving numerically for key operating conditions. The findings validate DC/DC converter performance under assumed ideal conditions and examine their practical limits.
This document presents three exercises focusing on DC/DC converters (buck and boost types). The first exercise analyzes the operation of a buck converter feeding a DC motor, covering voltage and current waveforms, as well as expressions for current ripple. The second exercise delves into a buck converter with a constant flux DC machine, deriving current expressions, ripple, and waveform characteristics. The third exercise discusses a boost converter and calculates voltage gain, current ripple, and dynamic parameters for specified operation conditions. Each exercise focuses on extracting ana...
This document contains an electrical measurement examination for first-year engineering students. It consists of three main exercises focusing on various methods to measure electrical resistance using different techniques and principles. The exam includes practical calculations and comparisons of methods.
This course covers the principles and operation of direct current (DC) motors, including shunt and series motors. Key topics include the functioning under constant and variable excitation, characteristics of speed and torque, and efficiency. The course also compares shunt and series motors and discusses practical applications.
This document outlines a monitored evaluation in electrical measurements for first-year engineering students. It includes exercises focused on measuring voltage with both analog and digital voltmeters, calculating associated uncertainties, and justifying the choice of measurement device. Candidates are expected to complete the exam within one hour without the use of notes or programmable calculators.
This document covers exercises related to DC motors with independent excitation. It includes calculations of electromotive force, electromagnetic torque, and performance parameters under various conditions. Students are tasked with analyzing motor characteristics and determining key electrical parameters.
This document covers the principles of controlled rectifiers using thyristors, detailing their operation and characteristics. It explores the functionality of different thyristor circuits, including calculations for the average rectified voltage. Additionally, it provides graphical representations of the thyristor voltage behavior over time.
This document contains an exam for first-year students in electrical engineering at the Institut Supérieur des Etudes Technologiques de Kélibia. It includes questions on circuit symbols, roles, and practical exercises related to the control and power circuits of asynchronous motors. The exam is structured with theoretical questions and practical exercises focusing on motor operation in different directions.
This document contains exercises related to measuring the power of alternating current electric motors and three-phase receivers. It includes methods for measuring voltage, current, and power using various instruments. The document also poses questions for calculation and justification of results.
This exam focuses on students' ability to create lighting diagrams for a domestic apartment layout. Students will demonstrate their understanding of electrical schematics through various tasks, including unifilar and multifilar diagrams for each room. The examination encompasses both practical application and theoretical knowledge in electrical installations.
This document covers the fundamentals of direct current machines, including their operational principles, mechanical rectification, and industrial realization. It delves into the production of electromotive force (f.e.m), the construction of the machines, and the behavior of the armature under load. This course is intended for students studying electrical engineering, providing insights into both theoretical and practical applications.
This document covers the fundamentals of electromagnetism as applied in electrical circuits, with a focus on the functioning of an iron core coil. Detailed equations and concepts related to magnetic circuits, losses, and induction are presented. Key topics include the properties of ferromagnetic materials and the application of vector representations in electrical analysis.
Cette document traite de la machine à courant continu, un convertisseur d'énergie qui peut fonctionner en moteur ou en génératrice. Il explique la structure de la machine, le phénomène d'induction et la description technique d'une machine tétrapolaire. Les détails incluent la fonction des composants tels que le stator et le rotor.
This document contains exercises related to direct current generators, including their characteristics at no load and under load, calculations regarding excitation and resistance, and various electrical principles applied in electrotechnics.
This document provides an overview of three-phase asynchronous machines, discussing their structure, functioning principles, and performance dynamics. It details the components like the stator and rotor, and elaborates on operational aspects such as slip and power balance. Additionally, it includes technical considerations for motor coupling and performance efficiency.
This document discusses the various braking processes used in electrical and mechanical systems. It details different types of braking methods, including mechanical and electrical braking, along with their principles and circuit designs. The introduction highlights the importance of effective braking in applications requiring rapid deceleration.
This document provides a comprehensive overview of electric generators and motors, emphasizing the transformation of mechanical energy into electrical energy. It describes the components and functioning principles of direct current machines, including inductors and rotors. The document details the roles of different parts within these machines and their operational characteristics.
This document discusses electrical preactuators, focusing on relays and contactors. It explains the principles, characteristics, and types of relays, including electromagnetic and static relays. Additionally, it covers the fundamental functioning of TRIACs within control circuits.