Course Description
In this Electric Machine course, we focus on synchronous generators and synchronous motors, examining their principles, operations, and distinctive characteristics. Synchronous generators are crucial for stable power generation, providing synchronized electricity to grids globally. Meanwhile, synchronous motors excel in industrial applications where precise control and efficiency are essential. We will delve into their construction, synchronization methods, operational principles, and performance characteristics. By the course's end, you will grasp how synchronous generators and motors function, their applications across diverse industries, and the technical nuances that underscore their importance in modern electrical systems.
Text:
A. E. Fitzgerald, Charles Kingsley, Jr And Stephen D. Umans, Electric Machinery. Mc GrawHill, 7th Edition
References:
P.C. Sen, Principles of Electric Machines and Power Electronics. Wiley, 3rd Edition
P.S. Bimbhra, Electrical Machinery . Khanna Publication
Lectures:
PowerPoint files related to the content are available. If you would like to acquire these file please get in touch with me at [karimpor@um.ac.ir/a.karimpoure@gmail.com] for further details.
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 the Rotating Machine
This segment of the electric machine classes explores the fundamental principles of voltage generation and force dynamics in electrical machinery. Students will delve into the operation and characteristics of both AC and DC machines, examining the mechanisms responsible for voltage generation in each type. The course will then shift focus to force and torque considerations, covering topics such as rotating MMF waves in AC machines and the principles of electromechanical energy conversion. Students will also analyze the determination of magnetic torques from both magnetic field and coupled circuit viewpoints, studying torque production conditions in various machine configurations.
3- Generation of Sinusoidal Voltage in a Synchronous Generator
In this section of the electric machine classes, students will focus on the generation of sinusoidal voltage in a synchronous generator. Key topics include the analysis of rotor winding factors, which play a crucial role in determining the quality and characteristics of generated voltage. The course will also cover stator winding factors, including stator distribution winding factor and stator pitch winding factor, which are essential for understanding how the windings contribute to the overall voltage output. Additionally, students will explore various generator connections, examining how these configurations affect the generation and distribution of electrical power in synchronous generators.
4- Synchronous Machine Analysis Part I
4- Synchronous Machine Analysis Part II
This part of the electric machine classes focuses on the comprehensive analysis of synchronous machines. Students will explore topics such as synchronous-machine inductances and equivalent circuits, providing a foundational understanding of the internal workings and electrical characteristics. The course covers the steady-state power-angle characteristic and operating characteristics, essential for assessing performance under various load conditions. Students will also examine the open- and short-circuit characteristics, which are crucial for determining machine parameters and performance limits. The effects of salient poles on machine behavior will be studied, introducing concepts from direct and quadrature-axis theory to explain their impact. Special attention will be given to the steady-state power-angle characteristic of salient-pole machines and the unique features of permanent magnet synchronous machines. Additionally, the course will delve into the transient behavior of synchronous machines, exploring how they respond dynamically to changes in load and operational conditions.