• Construction of dc machines SlideShare

    Feb 26, 2014· Construction of dc machines 1. Construction of DC machines By, Rohini Haridas Assistant Professor, Dept of Electrical Engineering, SSGM College of Engineering,Shegaon 2. Is DC generator and motor have same construction 3. Main construction diagram 4. Main parts The two major parts required for construction : 1.

  • Dc Motor Construction and Working SlideShare

    Apr 11, 2019· Construction •Core of these poles are made from silicon steel on which insulated copper wire is wound to make windings. •These poles are bolted and fixed inside the frame. Core 7. Construction • When DC current is pass through the windings it creates a static magnetic field. • There are two types of pole in a DC machine. 1. Main/ Field

  • Dc Machine PPT Xpowerpoint

    In A Dc Machine, The Carbon Brushes Are Always Placed At PPT. Presentation Summary : In a DC machine, the carbon brushes are always placed at the magnetic neutral axis. In no load condition, the magnetic neutral axis coincides with the. Source : https://eee3b201519.files.wordpress/2016/11/3em-dc-machine-armature-reaction.pptx

  • PowerPoint Presentation

    DC MACHINES by Prof RM.Meenakshisundaram Armature Reaction Interaction of Main field flux with Armature field flux Effects of Armature Reaction It decreases the efficiency of the machine It produces sparking at the brushes It produces a demagnetising effect on the main poles It reduces the emf induced Self excited generators some times fail to build up emf Armature reaction remedies 1.Brushes

  • DC Machines Principal

    DC Machines Construction The stator of the dc motor has poles, which are excited by dc current to produce magnetic fields. In the neutral zone, in the middle between the poles, commutating poles are placed to reduce sparking of the commutator. The commutating poles are supplied by dc current. Compensating windings are

  • Construction of dc Machines

    Construction of dc Machines: The rotor in a dc machine is called an 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. The stator in a dc machine is the field part of the machine.

  • Construction of DC Machine (Generator & Motor)

    Yoke (Magnetic Frame) The outer frame or yoke serves a double purpose : It provides mechanical
  • DC Machine Construction, Working, Types, EMF Equation

    A DC machine is an electromechanical energy alteration dev. The ing principle of a DC machine is when electric current flows through a coil within a magnetic field, and then the magnetic force generates a torque which rotates the dc motor. The DC machines are classified into two types such as DC generator as well as DC motor.

  • Basic construction and ing of a DC Generator

    Hence, let's call this point as construction of a DC machine instead of just 'construction of a dc generator'. The above figure shows constructional details of a simple 4-pole DC machine. A DC machine consists of two basic parts; stator and rotor. Basic constructional parts of a DC machine

  • What is a DC Machine Basic structure & Equivalent circuit

    A DC Machine is an electro-mechanical energy conversion dev. There are two types of DC machines, one is DC generator and another one is known as the DC motor. The construction of the dc motor and generator is nearly the same. The generator is employed in a very protected way. Hence there is an open construction type.

  • Construction of dc Machines

    Construction of dc Machines: The rotor in a dc machine is called an 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. The stator in a dc machine is the field part of the machine.

  • (PPT) Chapter 4 DC machines Getahun Seifu Academia.edu

    Academia.edu is a platform for academics to share research s.

  • ppt on dc generator construction

    Construction of Elementary Dc Generator. output leads. Field poles produce the main magnetic field of the machine (permanent magnet or electromagnet) PPT. About 1 results (0.33 milliseconds) Sponsored Links. Displaying Powerpoint Presentation on Lesson 7 Construction of Elementary Dc Generators availe to view or download. Download Lesson 7


    DC MACHINES • In DC machines, the field winding is wound onto the stator, while the armature winding is located on the rotor. • Current is supplied to the rotating armature winding through Commutator Segments. • Each commutator segment (also located on the rotor) is connected to an armature winding coil.

  • (PDF) Construction of DC Motor Engr AttaurRehman

    Basic construction details about design of DC Motor or Generator.

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

    Therefore, a DC motor otherwise a DC generator can be generally called as 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

  • Basic Electrical & DC Theory

    Module 2 Basic DC Theory This module describes the basic concepts of direct current (DC) electrical circuits and discusses the associated terminology. Volume 2 of 4 Module 3 DC Circuits This module introduces the rules associated with the reactive components of inductance and capacitance and how they affect DC circuits. Module 4 Batteries

  • Introduction to Rotating Machines

    multipole, three-phase synchronous motor under construction. In a dc machine, the armature winding is found on the rotating , 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 form a closed loop.

  • Construction of a DC Generator explanation of its

    The armature core of a DC generator or machine serves the following purposes. It houses the conductors in the slots. It provides an easy path for the magnetic flux. As the armature is a rotating part of the DC Generator or machine, the reversal of flux takes place in the core, hence hysteresis losses are produced.


    INTRODUCTION TO BASIC NOTIONS ON ELECTRIC POWER 5 Electric Current Conductor Lines of Force Fig. 1.3 Schematic representation of a magnetic field created by the flow of current in a conductor. The direction of the lines of force is given by the “law of the screwdriver”: mentally follow the movement of a screw as it is screwed in the same direction as that

  • Electrical Machines 1 Pdf Notes EM 1 Pdf Notes Smartzworld

    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

  • 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

  • Construction of DC Motor (Parts & Images) Electrical4U

    Jan 16, 2019· A stator is the static part of the DC machine that houses the field windings and receives the supply. A rotor is the rotating part of the DC machine that brings about the mechanical rotations. All these parts put together make up the total construction of a DC motor.

  • 4 Types of DC Motors and Their Characteristics

    Nov 17, 2019· Series DC motor. In a series DC motor the field is connected in series with the armature.The field is wound with a few turns of large wire because it must carry the full armature current. A characteristic of series motors is the motor develops a large amount of starting torque. However, speed varies widely between no load and full load.