Construction Of A Dc Machine Ppt


Construction of dc machines - SlideShare

Feb 26, 2014 · Construction of dc machines 7 Poles The magnetic poles are structures fitted onto the inner wall of the yoke with screws The construction of magnetic poles basically comprises of two parts namely, the pole core and the pole shoe stacked together under hydraulic pressure and then attached to the yoke


Construction of DC Machine and its components - DC

Sep 25, 2016 · Video Lecture on Construction of DC Machine and its components of Chapter DC Machine of Subject Basic Electrical Engineering for First-Year Engineering Students To Access Complete Course of Basic


Basic construction and working of a DC Generator

Construction of a DC machine: Note: A DC generator can be used as a DC motor without any constructional changes and vice versa is also possible Thus, a DC generator or a DC motor can be broadly termed as a DC machine These basic constructional details are also valid for the construction of a DC motor


Construction of dc Machines - UTK

Construction of dc Machines: armature The armature has cylindrical steel core that is composed of a stack of slotted laminations Slots in laminations are aligned axially along rotor or shaft Armature windings are placed in slots part of the machine Field poles …


Construction of DC Machine (Generator & Motor)

The dc generators and dc motors have the same general construction In fact, when the machine is being assembled, the workmen usually do not know whether it is a dc generator or motor Any dc generator can be run as a dc motor and vice-versa Read: Working of DC Motor Save All dc machines …


Construction of DC Machine - Polytechnic Hub

Construction of DC Machine The main parts of DC Machine (motor or generator) are as follows: 1 Yoke It also provide protection to whole machine from dust, moisture etc Yoke is also called as frame Material used For small M/C yoke is made of cast iron For large M/C it …


Construction of dc Machines - UTK

Construction of dc Machines: armature The armature has cylindrical steel core that is composed of a stack of slotted laminations Slots in laminations are aligned axially along rotor or shaft Armature windings are placed in slots part of the machine Field poles are located on …


Construction of DC Machine - Polytechnic Hub

Construction of DC Machine - there are seven main parts of dc machine or motor generator which as follows Yoke Pole core and pole shoes Pole coil


Construction of a DC Generator - Circuit Globe

Construction of a DC Generator A DC Generator is an electrical device which converts mechanical energy into electrical energy It mainly consists of three main parts, ie Magnetic field system, Armature and Commutator and Brush gear


Construction of DC Machine (DC Motor & DC Generator

Jan 09, 2014 · A SIMPLE explanation of the construction & parts of a DC Machine (DC Motor or DC Generator) Understand the parts of a DC Machine and the construction of a DC Machine Read our full article on the


Construction of Dc motor (all parts of dc motor in details)

Construction of Dc motor nearly looks like the construction of Dc generator, originally when the Dc machine starts working we can’t identify whether it’s a Dc generator or motor, briefly Dc motor consists of: Stator: it’s the stationary part containing the field winding …


Working principal of DC Motor: Construction of DC Motor

Jan 02, 2013 · Construction of Armature winding of dc motor The armature of the dc motor is attached to the rotor, or the rotating part of the machine, and as a result is subjected to altering magnetic field in the path of its rotation which directly results in magnetic losses


DC Motors - University of Rajshahi

Applications of DC Motor Shunt Motor: The characteristics of a shunt motor reveal that it is an approximately constant speed motor Industrial Use : Lathes, Drills, Boring Mills, Shapers , Spinning, and weaving machines Series Motor: It is a variable speed motor ie speed is low at high torque and vice versa This motor is


Dc motor - SlideShare

Jul 04, 2013 · Dc motor • The construction of pole is done using the lamination of particular shape to reduce the power loss due to eddy current pole shoe: • Pole shoe is an extended part of a pole Due to its typical shape, it enlarges the area of the pole, so that more flux …


Electrical Machines | electricaleasy

Different methods of electric braking of dc motors Parallel operation of shunt generators Operating 2 dc shunt generators in parallel PMDC motor Permanent magnet DC motors BLDC motor Construction and working of brushless dc motors AC Machines; Induction motor Working principle and types of induction motor Three phase induction motor Construction, working and types Rotating magnetic field …


DESIGN OF DC MACHINE - YMCA University of Science and

mmf A machine designed with long air gap requires large field mmf Thus the distortion effect of armature reaction can be reduced by large air gap length ii) Circulating current: if air gap length is small, a slight irregularity in the air gap would result large circulating current iii) Noise: the operation of machine with large air gap length is


Commutation in DC Machine or Commutation in DC Generator

Aug 01, 2018 · Commutation in DC Machine or Commutation in DC Generator or Motor August 1, 2018 February 24, 2012 by Electrical4U The voltage generated in the armature, placed in a rotating magnetic field , of a DC generator is alternating in nature


DC DRIVES Principle of operation and construction – a review

DC DRIVES Principle of operation and construction – a review DC machine consists of stator – stationary – where the field flux is produced rotor – rotating – where the armature winding is placed Field flux is obtained either from permanent magnet or from field winding excitation Field flux


Principle of Operation of DC Generator - DC Machines

Sep 27, 2016 · Video Lecture on Principle of Operation of DC Generator of Chapter DC Machine of Subject Basic Electrical Engineering for First-Year Engineering Students Construction of DC Machine and its


Dc Generator PPT | Xpowerpoint

Lesson 7: Construction of Elementary Dc Generators PPT Presentation Summary : Construction of Elementary Dc Generator output leads Field poles - produce the main magnetic field of the machine (permanent magnet or electromagnet)


What is a DC Machine? Basic structure & Equivalent circuit

DC Machine A DC Machine is an electro-mechanical energy conversion deviceThere are two types of DC machines; one is DC generator, and another one is known as DC motorA DC generator converts mechanical power (ωT) into DC electrical power (EI), whereas, a DC motor converts dc electrical power into mechanical power


Construction Of A Dc Machine Pdf Download

Nov 26, 2017 · Construction Of A Dc Machine Pdf Download -- tinyurl/ybauuv3k


Basic Parts of a DC Generator | Sciencing

May 10, 2018 · Fuel-combustion vehicles typically have a DC generator called an alternator that provides power to the electrical components of the vehicle and to recharge the battery All have similar basic parts: coil, brushes and a type of split-ring commutator to generate electricity


Basic Principles and Functions of Electrical Machines

Basic Principles and Functions of Electrical Machines OI Okoro, PhD1*, MU Agu, PhD1, and E Chinkuni, The Direct Current (DC) machine, the synchronous machine, and the induction • Rotor Construction - The rotor of AC machines can be of wound …


Experiment 1 The DC Machine - University of Colorado …

The stationary part of the machine is called the stator The field winding is normally placed on the stator A dc current through this field winding induces a flux φ in the machine, which flows through the stator iron, across the air gap, through the rotor iron, across the air gap, and back to the stator iron (Fig 3)


Chapter 6 Synchronous Machines - Educypedia

The stator of a synchronous machine consists of a laminated electrical steel core and a three phase winding Fig(a) below shows a stator lamination of a synchronous machine that has a number of uniformly distributed slots Coils are to be laid in these slots and connected in such a way that the current in each phase winding would produce a magnetic


DC Machines - NPTEL

magnetic machines The electrostatic principles do not yield practical machines for commer-cial electric power generation The present day machines are based on the electro-magnetic principles Though one sees a variety of electrical machines in the market, the basic under-lying principles of …


4 DC MOTORS - National University of Singapore

42 Construction DC motors consist of one set of coils, called armature winding, inside another set of coils or a set of permanent magnets, called the stator Applying a voltage to the coils produces a torque in the armature, resulting in motion Stator The stator is the stationary outside part of a motor


Commutation in DC Machine or Commutation in DC Generator

Aug 01, 2018 · 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 brushes


Lecture 6: Synchronous machines

Construction of synchronous machines Two common approaches are used to supply a DC current to the field circuits on the rotating rotor: 1 Supply the DC power from an external DC source to the rotor by means of slip rings and brushes; 2 Supply the DC power from a special DC power source mounted directly on the shaft of the machine


Notes for an Introductory Course On Electrical Machines

7 Synchronous Machines and Drives 81 71 Design and Principle of Operation 81 711 Wound Rotor Carrying DC 81 712 Permanent Magnet Rotor 82 72 Equivalent Circuit 82 73 Operation of the Machine Connected to a Bus of Constant Voltage and Frequency 84 74 Operation from a Source of Variable Frequency and Voltage 88 75 Controllers for PMAC Machines 94


Basic comparison between ac and dc motor - eblogbd

Sep 22, 2012 · The basic construction difference between ac and dc motor is that dc motor has direct conduction current supply to rotor and ac motor has inductive supply to rotor- no direct conduct A motor needs three basic things-A magnetic field, a current carrying conductor, harnessing the created force on current carrying conductor due to magnetic field in ways to create rotary motion hence generate torque


7 DC Machines - Basic Electrical and Electronics

DC machines work either as a dc generator or as a dc motor In a dc generator, a set of conductors or coils placed on a rotating body, called armature, are rotated continuously inside a magnetic field with the help of a prime mover (prime mover is another machine, may be a diesel engine or a turbine, which rotates the armature)


ELECTRICAL MACHINES II - uotechnologyeduiq

• The construction of motors and generators are similar • Every generator can operate as a motor and vice versa • The energy or power balance is : synchronous machine armatures and induction – motor stators above a few kW, are wound with double layer windings