construction of a dc machine ppt

Construction of a DC Generator | Basic Electrical ...

This video tutorial explains the construction of a DC Generator. The topic of learning is a part of the Basic Electrical and Electronics Engineering course t...


Working Principle of DC Motor - StudyElectrical.Com

There is no basic difference in the construction of a DC generator and a DC motor.. In fact, the same DC machine can be used interchangeably as a generator or as a motor. Like generators, there are different types of DC motors which are also classified into shunt-wound, series-wound and compound-wound dc motors.. DC motors are seldom used in ordinary applications because all …


DC Generator : Construction, Working Principle,Types, and ...

Therefore, a DC motor otherwise a DC generator can be generally called a DC machine. The construction of a 4-pole DC generator is shown below. This generator comprises of several parts like yoke, poles & pole shoes, field winding, an armature core, armature winding, commutator & brushes.


DC Motors - University of Rajshahi

DC Motors Although ac motors are used in most of the cases, DC motors have many applications and used for multi-purpose applications. DC Motor Principle A machine that converts dc power into mechanical energy is known as dc motor. Its operation is based on the principle that when a current carrying conductor is placed in a


Dc machines - SlideShare

Dc machines 1. 3/23/2007 ELEC A6 DC Machine 1 Lecture Notes ELE-A6 DC Machine 2. 3/23/2007 ELEC A6 DC Machine 2 DIRECT CURRENT (DC) MACHINES Fundamentals • Generator action: An emf (voltage) is induced in a …


DC Generator - Parts, Working, EMF Equation, Types ...

DC generators are used to reimburse the voltage drop within Feeders. DC generators are used to provide a power supply for hostels, lodges, offices, etc. This was a comprehensive explanation about DC generators. From the information above, we can conclude that the main advantages of a DC generator are its simple construction and design.


Basics of DC Motors For Electrical Engineers – Beginners

DC motor construction parts. A DC motor is composed of the following main parts: Field coil or stator. This is a non-moving part of the magnetic circuit on which a winding is wound in order to produce a magnetic field. The electro-magnet that is created has a cylindrical cavity between its poles. Armature or rotor


Construction of dc machines - SlideShare

Construction of DC machines By, Rohini Haridas Assistant Professor, Dept of Electrical Engineering, SSGM College of Engineering,Shegaon Slideshare uses cookies to improve functionality and performance, and to provide you with relevant …


Electrical Machines | electricaleasy.com

Construction and working of a DC generator. Armature winding Lap winding, wave winding and other related terms. Armature reaction Armature reaction in DC machines and it's adverse effects. EMF and Torque equation EMF equation of a DC generator and torque equation of a DC motor. Characteristics of DC generators Internal (E/Ia), external (V/I L ...


DC Motor Working Principle, Construction and Diagram ...

CONSTRUCTION OF DC MOTOR. All DC machines mainly consist of two parts. One is the stator and the other is Rotor. The stator is a stationary part that includes yoke, pole, pole winding, and Interpoles. The stator produces the magnetic flux. The rotor of the dc machine consists of a commutator, brushes, compensating winding, and a shaft.


Commutation in DC Machine or Commutation in DC Generator ...

The voltage generated in the armature, placed in a rotating magnetic field, of a DC generator is alternating in nature. The commutation in DC machine or more specifically commutation in DC generator is the process in which generated alternating current in the armature winding of a dc machine is converted into direct current after going through the commutator and the stationary …


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.


Construction of DC generator | Direct current machine ...

The principle of single loop DC generator has been described for the basic understanding of DC generator working. Now we will discuss the construction and working of actual generator. The construction of DC generator and DC motor is same therefore instead of DC generator let say DC machine which is more appropriate and cover all aspect of DC motor and DC generator construction.


Construction of DC Machines - The Engineering Knowledge

Construction of DC Machines. In the structure of DC machine either dc motor or generator, there are 2 main parts first one is the static or the second one is moving. The static part is stator and moving part is rotor. In stator of dc machine, there is a frame that provides protection and support to internal structure from external environment ...


DESIGN OF AXIAL-FLUX PERMANENT-MAGNET LOW-SPEED …

the machine and enables comparison of the designed machines, with respect to the volume, efficiency and cost aspects of each machine. It is shown that an axial-flux permanent-magnet machine with one-rotor-two-stators configuration has generally a weaker efficiency than a


DC Machine & Transformr | PDF | Transformer | Inductance

Dc Machine & Transformr - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. Scribd is the world's largest social reading and publishing site. ... ¤ The construction of these transformer is.


CHAPTER 8 DC MACHINERY FUNDAMENTALS

In general, the torque in any real machine will depend on the same 3 factors: 1. The flux in the machine 2. The current in the machine 3. A constant representing the construction of the machine. 2. Commutation in a Simple Four-Loop DC Machine Commutation is the process of converting the ac voltages and currents in the rotor of a dc machine to dc


DC GENERATOR - Weebly

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. CONSTRUCTION: Cross Sectional View of DC Generator Above figure shows the constructional details of a simple 4-pole DC generator. A DC generator


(PDF) Construction of DC Motor | Engr AttaurRehman ...

A practical DC motor consists of the following physical components: o Magnetic frame (yoke) o Pole shoes o Field coil o Armature core o Armature winding o Commutators o Brushes o Bearings Magnetic frame (Yoke): o It is made of cast iron or rolled steel.


(PDF) DC Motors - ResearchGate

DC Motor: Futures of DC Motors: 1- Most of the electrical machines in service are AC types. 2- DC machine are of considerable ind ustrial importance. 3- DC machine mainly used as DC m otors and ...


DC Machine: Basic Components and Function | EE Power School

The same basic DC machine can be either a motor or a generator. Essential Components of a DC Machine. DC machine either uses or produces electrical energy. It does this by converting mechanical energy into electrical energy or vice versa. A DC machine is made out of two essential parts, one stationary and one moving, called the field and the ...


3-Phase Induction Motors - UNLV

3-Phase induction machine construction • 3 stator windings (uniformly distributed as in a synchronous generator) • Two types of rotor: –Squirrel cage –Wound rotor (with slip rings) The rotating magnetic field ... • DC Test (or use Ohm-meter)


DC MACHINES AND TRANSFORMERS

II. Demonstrate the working principle of different types of dc machines and transformers. III. Analyze the losses in dc machines to improve the efficiency by conducting various tests. IV. Outline the principle of operation, construction and testing of single phase transformers. UNIT-I


Typical Electrical Drawing Symbols and Conventions.

49 - Machine or Transformer Thermal Relay 50 - Instantaneous Overcurrent 51 - AC Time Overcurrent Relay 52 - AC Circuit Breaker 53 - Exciter or DC Generator Relay 54 - High-Speed DC Circuit Breaker 55 - Power Factor Relay 56 - Field Application Relay 59 - Overvoltage Relay 60 - …


Chapter 5: AC Machine Fundamentals | Engineering360

The main principle of ac machine operation is this: A three-phase set of currents, flowing in an armature windings, each of equal magnitude and differing in phase by 120, produces a rotating magnetic field of constant magnitude. The stator shown in Fig. 5.1 has three coils, each 120 apart. Figure 5.1: A simple three-phase stator.


ELECTRICAL MACHINE-II

welded to the end rings shown in Fig: 3.1(b).In small machines the conductor bars and end rings are sometimes made of aluminium with the bars and rings cast in as part of the rotor core. Actually the entire construction (bars and end-rings) resembles a squirrel cage, from which the name is derived.


Introduction to Rotating Machines

multipole, three-phase synchronous motor under construction. In a dc machine, the armature winding is found on the rotating member, referred to as the rotor. Figure 4.2 shows a dc-machine rotor. As we will see, the armature winding of a dc machine consists of many coils connected together to …


Electrical Machines 1 (EM 1) Pdf Notes - 2020 | SW

The Electrical Machines 1 Notes Pdf – EM 1 Notes Pdf book starts with the topics covering Electromechanical Energy conversion, Construction & Operation, Generator:Armature reaction, separately excited and self excited generators, Load characteristics of shunt, Principle of operation, Speed control of d.c. Motors, Testing of d.c. machines ...


Types of D.C Machine - javatpoint

4. Compound wound D.C. machine: A Compound machine is a machine which has both shunt and series fields. Two windings are carried out by each pole of the machine. The series winding has few turns of large cross-sectional area, and the shunt windings have many turns of fine wire. It can be connected in two ways.


Direct-Current Machines - Engineering

• DC machines can develop rated torque at all speeds from standstill (locked-rotor) to rated speed. DC machines are easier to analyze than their AC counterparts, although their construction is made rather complex by the fact that they need a commutator, which reverses the direction of currents and fluxes to produce a net torque. • DC motors ...


What is a DC Machine? Basic structure & Equivalent circuit ...

A DC Machine is an electro-mechanical energy conversion device. There are two types of DC machines; one is the DC generator, and another one is known as DC motor. A DC generator converts mechanical power (ωT) into DC electrical power (EI), whereas, a DC motor converts d.c electrical power into mechanical power.


Construction of a DC Generator - explanation of its ...

A DC Generator is an electrical device which converts mechanical energy into electrical energy. It mainly consists of three main parts, i.e. magnetic field system, armature and commutator and brush gear. The other parts of a DC Generator are magnetic frame and yoke, pole core and pole shoes, field or exciting coils, armature core and windings, brushes, end housings, bearings and shafts.