In this Electric Machine course, we explore the principles and applications of DC machines and induction machines. Throughout the semester, you'll delve into the inner workings of these essential electrical devices—from foundational theories of electromagnetism to practical applications in various industries. By the end, you'll have a comprehensive understanding of how DC and induction machines convert electrical energy into mechanical energy and vice versa, equipping you to tackle real-world engineering challenges with confidence.

Text:

A. E. Fitzgerald, Charles Kingsley, Jr And Stephen D. Umans, Electric Machinery. Mc GrawHill, 7th Edition

References:

 Lectures:

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1- Inroduction

This section of the course covers the essential components of electrical systems, focusing on the generation, transmission, and distribution of electrical energy. Students will gain a comprehensive understanding of how electrical energy is generated through various methods, including conventional and renewable sources.

2- Introduction to rotating Machines

In this section of the course, we will delve into the foundational principles governing electrical machinery. We will explore the mechanisms of voltage generation in both AC and DC machines, examining the underlying theories and practical applications. Additionally, we will study the fundamental concepts of force and torque in electrical machines, focusing on electromechanical energy-conversion principles and the determination of magnetic torques from a magnetic field perspective. The analysis will include detailed discussions on rotating MMF (Magneto-Motive Force) waves in AC machines and the conditions necessary for torque production in various machine configurations.

3- DC Machine Analysis

 This section of the course focuses on the intricate workings of DC machines, with a detailed exploration of commutator action and its analytical fundamentals. Students will delve into the electric-circuit aspects of DC machines, understanding how armature MMF influences performance, including considerations of armature reaction, commutation, interpoles, and compensating windings. The course will cover the steady-state performance characteristics of DC machines, examining their operational efficiency and stability. Additionally, students will study the unique attributes of permanent-magnet DC machines, series universal motors, and the principles governing the starting mechanisms of DC motors.

4- Induction Machine Analysis

 In this part of the electric machine classes, students will explore the principles governing polyphase induction machines. Topics include the analysis of currents and fluxes within these machines, the construction and examination of the induction-motor equivalent circuit, and the application of Thevenin’s Theorem to determine torque and power characteristics. The course will also cover parameter determination through no-load and blocked-rotor tests, along with an exploration of the effects of rotor resistance on performance. Special attention will be given to different rotor types such as wound and double-squirrel-cage configurations, emphasizing their influence on motor efficiency and operation.