Principles and Working of DC and AC machines
When a dc voltage is applied to the field windings of a dc generator, current flows through the windings and sets up a - - steady magnetic field. This is called FIELD EXCITATION. This excitation voltage can be produced by the generator itself or it can be supplied by an outside source, such as a battery. DC Machines
PPT
Construction. DC Machine Construction Figure 8.1 General arrangement of a dc machine. DC Machines • The stator of the dc motor has poles, which are excited by dc current to produce …
CONSTRUCTION OF DC MACHINE UNIT-III BY S RATNA …
construction of dc machine unit-iii by s ratna kumar. lap winding . lap winding and wave winding . winding progresses,winding retrogresses. equalizer rings. uses of lap winding. ... of dc machines . dc generator symbol. dc coupled machines . methods of excitation . seperately excited generator. voltage and current relation. problem.
DC machines PPT.pptx
DC machines PPT.pptx. Dec 29, 2022 •. 0 likes • 281 views. AI-enhanced description. B. BalramGyadari1 Follow. This document provides an overview of DC machines, including their construction, …
(PPT) Chapter 4 DC machines | Getahun Seifu
Download Free PDF. View PDF. Electrical Machines Lab Slides: Separately-Excited DC Motors. Tareq Foqha. Download Free PDF. View PDF. Electrical Machines -1 Lecture …
DC Motors and Generators
DC motor Fall15 Revised: November 4, 2016 11 of 21 THE TEST SET-UP The DC machine to be tested and the dynamometer have already been placed on the bench and …
DC Machine: Basic Components and Function | EE Power …
An essential example of a DC machine is a copper coil spinning on its own axis between two magnets. A practical DC machine also needs a commutator, brushes, poles and bearings. 1- Field (magnetic poles) 2- Armature. 3- Commutator. 4- Yoke and Bearings. 5- Carbon Brushes of a DC Machine. 1. Field Winding of a DC Machine. The …
CONSTRUCTION OF DC MACHINE UNIT-III BY S RATNA …
construction of dc machine unit-iii by s ratna kumar. lap winding . lap winding and wave winding . winding progresses,winding retrogresses. equalizer rings. uses of lap winding. …
grasscutter ppt.ppt
Similar to grasscutter ppt.ppt. works by varying the average voltage sent to the motor. It could do this by simply adjusting the voltage sent to the motor, but this is quite inefficient to do. A better way is to switch the motor's supply on and off very quickly. If the switching is fast enough, the motor doesn't notice it, it only notices the ...
Construction of DC Motor | Machine
Also, we can entitle it as the construction of DC machine. A DC motor or machine consists of two windings namely field winding and armature winding. The field winding is stationary and the armature winding can rotate. The field winding produces a magnetic flux in the air gap between the armature and field windings and the armature is placed in ...
Construction of DC Motor (Parts & Images)
A Yoke. Poles. Field windings. Armature windings. Commutator. Brushes. A stator is the static part of the DC machine that houses the field windings and receives the supply. A rotor is the rotating …
PPT
DKT 123 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 mechanical energy to …
DC Machine – Construction, Working, Types and Applications
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What is a DC Machine : Construction & Its …
The construction of the DC machine can be done using some of the essential parts like Yoke, Pole core & pole shoes, Pole coil & field coil, Armature core, Armature winding otherwise conductor, commutator, …
Dc machines | PPT
Dc machines - Download as a PDF or view online for free. ... DC machines PPT.pptx BalramGyadari1 ... Wednesday, January 27, 2016 Ch. 16 DC Machines 13 Construction • The main parts of a DC machine are – Yoke – Poles, pole shoes. – Field Coils. – Armature. – Commutator. – Brushes.
Dc motor | PPT
Construction of DC Motor: 5. Function of each part of DC Motor: Yoke: • It is outer cover of dc motor also called as frame. • It provides protection to the rotating and other part of the machine from moisture, dust etc. • Yoke is an iron body which provides the path for the flux to complete the magnetic circuit.
Brushless DC Motors | PPT
3. Abstract…. • Permanent magnet (PM) brushless DC motors (BLDCM) are generated by virtually inverting the stator and rotor of PM DC motors. • These motors are actually fed by rectangular AC …
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.
PPT
Chapter 6DC and AC Machines. Introduction • An electrical machine is link between an electrical system and a mechanical system. • Conversion from mechanical to electrical: generator • Conversion from electrical to mechanical: motor. Introduction Machines are called • AC machines (generators or motors) if the electrical system is AC.
DC Motors and Generators
DC motor Fall15 Revised: November 4, 2016 11 of 21 THE TEST SET-UP The DC machine to be tested and the dynamometer have already been placed on the bench and mechanically coupled. On the right-hand end of the dynamometer is a clamp which locks the rotor and stator. This lock is used when measuring the locked-rotor torque of the test …
Operating Principle of DC Generator | PPT
2. Basic Principle Electrical generator is a machine which converts mechanical energy into electrical energy. In DC Generator, energy conversion is based on the principle of the production of dynamically induced emf. 𝑊ℎ𝑒𝑟𝑒 𝐵 𝑎𝑛𝑑 𝑉 𝑎𝑟𝑒 𝑣𝑒𝑐𝑡𝑜𝑟 𝑞𝑢𝑎𝑛𝑡𝑖𝑡𝑖𝑒𝑠. e=𝐵 ...
Construction of DC Machine | PDF | Mechanical Engineering …
Construction of DC Machine - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. Scribd is the world's largest social reading and publishing site.
(PPT) Chapter 4 DC machines | Getahun Seifu
Construction The basic parts of DC machines are: A. Stator (stationary part) B. Rotor (Rotating part ) 6 7 1. shaft 2. end-bearings 3. Commutator 4. brushes 5. armature 6. main-pole 7. main-pole field winding 8. frame 9. end-shield 10. ventilator 11. basement 12. bearings 8 Stator consists of Stator Frame (name plate, terminal box, basement ...
CONSTRUCTION OF DC MACHINE, INDUCTION …
6. CONSTRUCTION OF DC MACHINE Armature winding • This winding is placed in the slots of rotor. • Several turns of copper wire are wound through these slots Commutator • The Commutator converts AC …
Armature Reaction | PPT
Armature Reaction in a d.c. machine is basically the effect of armature produced flux on the main flux or field flux . 3. Effects…. • The armature reaction produces the following two undesirable effects: 1. It demagnetizes or weakens the main flux. 2. It cross-magnetizes or distorts the main flux. 4.
synchronous machine construction | PPT
2. Alternator Slide No.4CUH Slide Synchronous generator or AC generator is a device which converts mechanical power in the form of A.C. It works on the principle of ELECTRO MAGNETIC INDUCTION and it is also called as Alternator. An alternator consists of armature winding and field magnet, but the difference between the …
Basics of Electrical Machines | PDF
Dc machines ppt. Dc machines ppt viignesh viignesh ... Rotor – It is the rotating part of the machine. 2.1 Construction of a DC Machine The mains parts of a DC machine are Yoke : It is the outermost part of a DC motor or a DC generator. It is made of cast iron or cast steel. It act as a supporting frame to hold the machine and to protect …
PPT
DC Machines PowerPoint Presentation, free download - ID:1753968. 1 / 30. Download Presentation >> Chapter 3. DC Machines. Jul 14, 2014. 4.84k likes | 8.67k Views. Chapter 3. DC Machines. …
DC Machine
DC Machine: Steady state model and behaviour. Speed-Torque Characteristics + _ + _ a I I a a. Feed back between electrical and mechanical world L d TT J dt ... Microsoft PowerPoint - DC Machine Author: Kishore Chatterjee Created Date: 8/28/2009 3:51:44 PM ...
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. …