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Introduction to Alternators

In this free online course, learn about the important characteristics, theory and construction of Alternators.

Publisher: ADU
This online course will help you learn how to work with an alternator, an electrical machine that converts mechanical energy into electrical energy. Alternators are lighter and more economical compared to DC generators. You will learn in detail about the operation and construction of alternators. We will also look at the characteristics as well as the synchronization of Alternators and output waveform in this course.
Introduction to Alternators
  • Duration

    4-5 Hours
  • Students

  • Accreditation


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This course will teach you about the use of generators, an electrical machine that converts mechanical energy into electrical energy. Alternators are lighter and more economical compared to DC generators. Since the generator uses slip rings, it has a longer life than a commutator in a DC generator. There are also developments such as "brushless excitation systems" that eliminate the need for brushes, slip rings and commutators. In this system, only a 3-phase AC exciter and a group of rectifiers are needed to supply DC power to the generator. Both AC generators or alternators and DC generators work on the principle of electromagnetic induction. You will be introduced to the theory of alternators and the methods used to generate EMF and Faraday's Law. You will also learn about the components and construction of alternators in detail. Want to know how to derive the equation for the emf generated by a generator? This is also explained in this course with the help of examples.

The course then explains 3-phase windings and the waveform of 3-phase output voltage. We will discuss the generation of three-phase voltages in alternators as well as star and delta circuits. We will also look at the role of rotors and damper windings in alternators. You will also learn about the characteristics of alternators and the open circuit and short circuit characteristics of alternators. Would you like to know how armature resistance, voltage regulation, synchronous impedance and synchronous reactance work? These important topics will also be covered in detail in this course. We will also study the excitation system using the DC exciter. Next, we will explore why we need automatic voltage regulators in a generator. You will learn about operating a generator with a carbon stack regulator and operating a generator with an oscillating contact. We will look at phase sequence in the AC system, including how the phase sequence indicator works.

In the last topics of this course, you will learn what conditions must be met for synchronization. Then, we will explain the lamp methods for checking synchronism as well as the parallel connection or synchronization of generators. In addition, we will also explore the effects of faulty synchronization. This course will help you understand load sharing and the parallel operation of alternators. You will look at load management by additional generators and power factor management by alternators. We will also look at the damage that can occur to generators if the required conditions are not met. This course is ideal for students or engineers who want to gain knowledge in the use of alternators. So why wait, start your learning journey today.

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