Direct-Current Machines
Direct-current (DC) machines are driven from a DC power supply. DC machines are the most versatile of all rotating electrical machines. Their speed may be easily adjusted in …
Lecture Notes ELE-A6
DIRECT CURRENT MACHINES DC machine Construction • The rotor iron core is mounted on the shaft. • Coils are placed in the slots. • The end of the coils are bent and …
DC Machine – Construction, Working, Types and Applications
Construction of DC Machine. The DC machine consists of Yoke, Pole, and Pole shoe, Armature core, Field Winding, Armature Winding, Commutator, Brushes, shaft, and Bearings. Let's explain each part in detail with applications. Yoke or Frame. The yoke is also known as the frame.
Direct Current Machines
Direct current motors are ideal for applications where speed and torque control are required. Direct current motor design and complexity has changed from early times where dc machines were used primarily for traction applications. Direct current motors are used for various applications ranging from steel rolling mills to tiny robotic systems.
Basic construction and working of a DC Generator.
A dc generator is an electrical machine which converts mechanical energy into direct current electricity. This energy conversion is based on the principle of production of dynamically induced emf. ... Hence, let's call this point as construction of a DC machine instead of just 'construction of a dc generator'. The above figure shows ...
DC Machines
Direct current machines - Construction - Field windings - Armature windings - Commutator action - Compensation windings - DC generators connections - Characteristics of DC generators - Speed control of DC motors - Field voltage control - Armature voltage control - Starting of DC motor - Braking of DC motor - Efficacy - Machine testing - …
Direct Current Generator Components
Learn about direct current generator components such as field windings, armature, commutators, brushes, and frames. A generator (alternator) is a machine that uses electromagnetic induction to convert mechanical energy into electrical energy. A direct current (DC) generator works on the principle that a voltage is induced in a conductor …
DC Motor: Definition, Construction, Working, Types, and …
DC motor is a machine that converts electrical energy of direct current into mechanical energy. In a DC motor, the input electrical energy is direct current which is converted into mechanical rotation. In this article, we will learn what is DC motor, its Diagram, Construction, Working, types, and applications.
Course Syllabi: UEE301 Direct Current Machines and …
Course number and name: UEE301; Direct Current Machines and Transformers 2. Credits and contact hours: Credits: 4.5; Hours: 6 3. ... electrical machines, Construction of DC machines, Principle of DC generator, Principle of DC motor, Lap winding, Wave winding, Electrical and mechanical degrees.
DC Motor, Direct Current Motor: DC Motor Construction and Types
Direct current motors: The direct current motors simply means a motor that uses direct current which convert electrical energy into mechanical energy. We can use the direct current motors in our power tools, our toy car, and even in our cooling fans. DC motors are very popular in automatic machines because of: Fast reaction. Better …
Direct Current Machine and Drive
In this chapter, the authors treat the direct-current (dc) machines sufficient to introduce the reader to the operating principles of dc machines with focus on the shunt-connected and permanent-magnet dc machine and drive. The magnets are samarium cobalt and the device is used to drive hand-held battery-operated surgical instruments.
Part 1 – DC Machine Construction and Operating Principles
A commutator is a cylindrical arrangement of insulated metal bars connected to the coils of a direct-current electric motor or generator, providing a unidirectional current from the …
Direct-Current Machines | part of Electromechanical Motion …
Elementary Direct-Current Machine. Voltage and Torque Equations. Permanent-Magnet dc Machine. Dynamic Characteristics of a Permanent Magnet dc Motor. Introduction to Constant-Torque and Constant-Power Operation. Time-Domain Block Diagram and State Equations for the Permanent-Magnet dc Machine. An Introduction to Voltage Control. …
What is a DC Machine : Construction & Its Working
What is a DC Machine : Construction & Its Working. The DC machine can be classified into two types namely DC motors as well as DC generators. Most of the DC machines are equivalent to AC machines because they include AC currents as well as AC voltages in them. The output of the … See more
Dynamo Electric Machinery. Its construction, design, and …
Dynamo Electric Machinery.Its construction, design, and operation. Direct current machines. By Sheldon, A.M., Ph.D. Assisted by Hobart Mason, B. S. 12 mo. Pp. 281.
DIRECT CURRENT MACHINES | SpringerLink
Abstract. The genesis of the ideas required to build an electrical machine can be traced back to the discovery of electromagnetism by the Danish scientist Oersted in 1819-20. Oersted discovered that a current in a wire could deflect a compass needle. Thus the connection between a current carrying conductor, a magnetic field and mechanical ...
DIRECT CURRENT (DC) MACHINES Fundamentals
Real DC machine Construction •Stator: Stationary part of the machine. The stator carries a field winding that is used to produce the required magnetic field by DC excitation. Often known as the field. •Rotor: The rotor is the rotating part of the machine. The rotor carries a distributed winding, and is the winding
Study Notes
STUDY NOTES ELECTROTECHNICS N. Week 3. DC MODULE. OBJECTIVES : By the end of this module you should be able to: - Know and understand the construction and operation of simple machines involving electromagnetism - Know and understand the characteristics and uses of DC machines - Understand the fields (series, shunt and …
Direct Current Machines
The field current is equal to the armature current. The armature induced voltage E a and torque T with magnetic flux F at angular speed w are: E a = k f F w I a = k m w I a T = k f …
Chapter 2: Direct Current Machines – PEG-3722 …
PEG-3722 Electrotechnology. Chapter 2: Direct Current Machines. By the end of this module, you should be able to: First. Second. Previous: Part 9 – Three-Phase AC and …
Direct-Current Machine | Article about Direct-Current Machine …
Direct-Current Machine. an electric rotating machine that converts mechanical energy to DC electrical energy (a generator), or vice versa (a motor). It is reversible—that is, the same machine can operate both as a generator and as a motor. For example, traction motors of rolling stock and servomotors of high-power DC electric drives operate ...
Direct Current Machines | SpringerLink
The direct current (DC) machine is still in use given that it has certain advantages in terms of controllability and low manufacturing costs. In …
Direct-current machines and equations
Direct-current machines and equations. 8th April 2018 by editor. The schematic of a DC machine is depicted below. As you can see it has magnetic poles on both stator and rotor. The torque, created by the DC machine, is the result of magnetic forces between the stator and rotor. Note that the torque is at maximum when the angle …
Chapter 2: Direct Current Machines – PEG-3722 …
Part 1 - DC Machine Construction and Operating Principles. Part 2 - Constructional Details of DC Machines. Part 3 - DC Generators. ... Chapter 2: Direct Current Machines Chapter 2: Direct Current Machines. By the end of this module, you should be able to: First; Second . Previous/next navigation.
DC MACHINES Basic Structure of Electrical Machines
A DC Machine is an electro-mechanical energy conversion device. There are two types of DC machines; one is DC generator, and another one is known as DC motor. A DC generator converts mechanical ...
DC Motor or Direct Current Motor: What is it? (Diagram …
Principle of DC Motor. When a current-carrying conductor is placed in a magnetic field, it experiences a torque and has a tendency to move. In other words, when a magnetic field and an electric field interact, a mechanical force is produced. The DC motor or direct current motor works on that principle. This is known as motoring action.
Operation, Construction, and Functionality of Direct Current Machines
Operation, Construction, and Functionality of Direct Current Machines brings together many concepts, from the most basic working principles and construction of DC machines to more advanced topics such as electro-magnetism, armature reaction, parallel operations, and many more. Highlighting theoretical concepts and numerical problems, this book ...
Dynamo electric machinery; its design, construction, and …
Dynamo electric machinery; its design, construction, and operation; direct-current machines ... Dynamo electric machinery; its design, construction, and operation; direct-current machines by Sheldon, , 1862-1920; Hausmann, Erich, 1886- joint author. Publication date 1915 Topics Electric machinery Publisher New York, D. Van Nostrand …
DC Machines Construction
DC Machines Construction. Direct current machines are energy transfer devices. These machines can function as either a motor or a generator. DC motors and generators have the same basic construction, differing primarily in the energy conversion. To better understand the operation and construction of DC machines, a few basic terms must be ...
Introduction to DC Machine
DKT 213 CHAPTER 4 Introduction to DC Machine. Contents • Overview of Direct Current Machines • Construction • Principle of Operation • Types of DC Machine • Power Flow Diagram • Speed Control. LEARNING OBJECTIVES • Upon completion of the chapter the student should be able to: • State the principle by which machines convert …
