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Basic Principles and Functions of Electrical Machines

• Rotor Construction - The rotor of A.C. machines can be of wound type or squirrel cage type. A typical squirrel cage rotor is shown in Figure 6. Depending on the number of poles and whether the shaft is of the spider or cylindrical type, the rotor core is shrunk ...

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DC Machines unit-4(2).pdf

View DC Machines unit-4(2).pdf from EEE 1151EE101 at Vel Tech Rangrajan Dr. Sagunthala R&D Institute of Science and Technology. UNIT 4 ELECTRICAL MACHINES Construction of DC machine • The main Yoke • Function – It provide mechanical Support for poles – It also provide protection to whole machine from dust, moisture etc. ...

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DC MACHINES (17CA02301)

LECTURE NOTES ON DC MACHINES (17CA02301) 2018 – 2019 II B. Tech I Semester (CREC-R17) Mr. K.Raju,Assistant Professor CHADALAWADA RAMANAMMA ENGINEERING COLLEGE (AUTONOMOUS) Chadalawada Nagar, Renigunta Road, Tirupati

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D.C GENERATORS

University of Babylon Electrical machines mechanical department U1.3 Construction of DC Generators The parts of a simple DC generator are shown in fig.(1.3). The principle of operation of a DC generator is similar to that of the AC generator, which

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DC Machine

 · From the above information, finally, we can conclude that DC machines are dc generator & dc motor. The DC generator is mainly useful for supplying DC sources toward the DC machine in power stations. Whereas DC motor drives some devices like lathes, fans, centrifugal pumps, printing presses, electric locomotives, hoists, cranes, conveyors, rolling mills, auto-rickshaw, ice machines, etc.

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DC Motors

Motors and generators are dc machines. There are several tests to judge the performance of a DC machine. The efficiency of a dc machine depends upon the losses. The smaller the losses, the greater is the efficiency of the machine. 3/7/2011 18 What is meant ...

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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

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Experiment 1 The DC Machine

Experiment 1 The DC Machine ECEN 4517 R. W. Erickson and D. Maksimovic The purpose of this experiment is to become familiar with operating principles, equivalent circuit models, and basic characteristics of a dc machine. Dc machines are most commonly

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Design of DC Machines

3. Design of DC Machines 3 Shital Patel, EE Department Design of DC Machines and Transformer (2160912) 2 (a) Power developed by DC generator In case of DC generator, prime mover supplies friction, windage and iron loss. Armature supplies its own

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Electrical machines

Construction of DC Generator •The difference between the two is merely due to the different _____ of connections at the front of commutator end of the armature. •it is suitable for high voltage low current machines like generators used •

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Direct-Current Machines

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 are used in a ...

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Fundamentals of DC machines

Workbook With CD-ROM Festo Didactic 571783 en Fundamentals of DC machines L1 N PE V A1 A2 E2 E1 L+ L-L+ L-M-P1-M1-T1 -T2 30 60 90 120 150 180 210 240 270 300 330 Order no. 571783 Revision level: 05/2011 Author: Jürgen Stumpp Editor

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DESIGN OF DC MACHINE

machines use small value of ampere conductors per meter. Size of machine: in large size machine there is more space for accommodating copper. There fore high value of ''ac''could be used. 7 ...

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Basic Electrical Engg BEE1101

DC Motor: Back e.m.f., speed and torque of a DC Motor, Conditions for maximum Power. Speed control of DC shunt motor. Transformers: Construction and Principle of operation of single-phase transformer, EMF equation, Single-phase autotransformer.

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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

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DC Machines I.pdf

View DC Machines I.pdf from ELE 1801 at University of Southern Queensland. ELE1801 DC Machines I DC Machine Construction Speaker: Joel Kennedy CRICOS QLD00244B

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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

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DC machines

DC machines 3 No-loadcharacteristic VariationofthevoltageE vasafunctionofthe excitationcurrentI e,atconstantspeedandwithno deliveredcurrent î í ì = q= = I0 vitesseconstante Ef(I)avec a ve! No-loadcharacteristic Ev=kEq!Fv(Ie) Magneticflux producedby the e ...

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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

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dc motor construction and working pdf

Construction of dc MachinesUTK Construction of dc Machines The rotor in a dc machine is called an armature. ... Searches related to Construction of a DC Machine. construction construction of dc machine pdf. working Read More Brushless DC Motor Control ...

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(PDF) DC Motors

PDF | On May 3, 2019, Ahmed M T Ibraheem Alnaib published DC Motors | Find, read and cite all the research you need on ResearchGate Encourage e-learning and work to supplement it with new ideas ...

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THEORY, CONSTRUCTION, AND OPERATION

6 PRINCIPLES OF OPERATION OF SYNCHRONOUS MACHINES (a) (b) Fig. 1.5 Electricity. (a) Ionic clouds of positive and negative currents. The positive clouds are normally atoms that lost one or more electrons; the negative clouds are normally free electrons.

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DC Motor

Construction of DC Motor The construction of the DC motor is shown below. It is very important to know its design before knowing it''s working. The essential parts …

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VI. DC Machines

3 Construction of DC Machines Elementary DC machine with commutator. Copper commutator segment and carbon brushes are used for: (i) for mechanical rectification of induced armature emfs (ii) for taking stationary armature terminals from a moving member

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(PDF) DC Motor DC Motor theory | Cahtayu Cahtayu

Academia is a platform for academics to share research papers. DC Motor DC Motor theory The DC motor has two basic parts: the rotating part that is called the armature and the stationary part that includes coils of wire called the field coils.

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Construction of DC Motor

Both the DC machines i.e. DC generator and DC motor have the same construction. Therefore, either machine can be used as a motor or a generator. So the following discussion about the construction of DC motor is equally valid for the construction of the DC.

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Construction of dc machines

 · 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 advertising.

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UNIT I DC MACHINES 1-29

UNIT I DC MACHINES 1-29 1.1 Three Phase Circuits, A Review 01 1.2 Construction of DC Machines 08 1.3 Theory of Operation Of DC Generators 09 1.3.1 EMF Equation of Generator 11 1.4 Characteristics of DC Generators 12 1.5 Operating Principle of DC Motors

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DC Machines

8 DC Machines Construction The poles are mounted on an iron core that provides a closed magnetic circuit. The motor housing supports the iron core, the brushes and the bearings. The rotor has a ring-shaped laminated iron core with slots. Coils with several turns are

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