basic construction of dc machines
DC Machine Construction | Its Parts and their Function
Yoke is also called as frame of the machine. It provides protection to the rotating and other parts of the machine from moisture, dust and mechanical damage etc. Also it provides the mechanical support for the poles. It is an iron body which provides the low reluctance path for the flux. This is essential to complete the magnetic circuit.
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Construction Of A Dc Machine And Working Of Dc Motor
a) Functions : To facilitate the collection of current from the armature conductors. To convert internally developed alternating e.m.f. to unidirectional (d.c.) e.m.f. To produce unidirectional torque in case of motors. b) Choice of material : As it collects current from armature, it is also made up of copper segments.
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DC Machines MCQ (Multiple Choice Questions)
The section contains multiple choice questions and answers on dc machines applications, construction, pmdc motors, brushes and commutator assembly. ... The section contains questions and answers on dc motors basics and starting, speed control of shunt and series motor, dc motors braking and ward leonard speed control method. DC Motor Basics ...
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What is a DC Machine : Construction & Its …
The DC machine e.m.f can be defined as when the armature in the dc machine rotates, the voltage can be generated within the coils. In a …
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DC Motors and Generators
DC machines are one of the three basic multiply-excited rotational electromechanical energy converters. Figure 1 shows an elementary doubly-excited magnetic system. ... through 5 illustrate the general construction of DC machines and the commutator. Figure 2: Diagram of a DC machine. DC Motors and Generators DC motor Fall15 Revised: …
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DC motors and generators
The basic construction of a DC motor is shown in Figure 1. Standard DC motors are readily available in one of two main forms: Wound-field, where the magnetic flux in the motor is controlled by the current flowing in a field or excitation winding, usually located on the stator. Permanent magnet, where the magnetic flux in the motor is created …
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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 …
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Solved Q1. Explain the basic construction of DC machines.
1.CONSTRUCTION OF DC MACHINES. A DC Machine is the an electro-mechanical energy conversion device.A DC machine consists of two basic parts; stator and rotor.The below figure shows the basic construction diagram of a dc machine. a) YOKE : The out …View the full answer
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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 …
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DC Machine Construction and Operation
The operation is basically the same as the foregoing description for the simple DC machines. For motor operation, a DC voltage is applied to the armature terminals. The commutator inverts the DC to provide an AC …
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Classifications of DC machines : (DC Motors and DC …
by Kiran Daware DC Machines. Linkedin. Each DC machine can act as a generator or a motor. Hence, this classification is valid for both: DC generators and DC motors. DC machines are usually classified on the basis of their field excitation method. This makes two broad categories of dc machines; (i) Separately excited and (ii) Self-excited.
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DC Machines Construction
DC Machines Construction. Direct current machines are energy transfer devices. These machines can function as either a motor or a generator. DC motors and generators have the same basic construction, differing primarily in the energy conversion. To better understand the operation and construction of DC machines, a few basic terms must be …
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DC Machine Construction and Operation | Electrical Academia
The operation is basically the same as the foregoing description for the simple DC machines. For motor operation, a DC voltage is applied to the armature terminals. The …
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DC Motor: Definition, Construction, Working, Types, and …
DC motor is a machine that converts electrical energy of direct current into mechanical energy. In a DC motor, the input electrical energy is direct current which is converted into mechanical rotation. In this article, we will learn what is DC motor, its Diagram, Construction, Working, types, and applications.
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DC Motor | Construction | Parts
Figure 7 Armature for 0.25 kW 240 V DC motor. On large machines the central portion of the armature core is removed and the remaining laminated cylinder is attached to the armature shaft by means of radial arms (called a spider). This type of construction is shown in Figure 8. Figure 8 Larger size armature core construction in DC Motor
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Construction and Working Principle of DC Generators
Here is the schematic diagram of a DC Generator. A DC generator consists of six main parts, which are as follows. Yoke. The outer frame of a DC generator is a hollow cylinder made up of cast steel or rolled steel is known as yoke. The yoke serves following two purposes. It supports the field pole core and acts as a protecting cover to the machine.
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Construction of dc machines | PPT
Education. 1 of 12. Download Now. Download to read offline. Construction of dc machines - Download as a PDF or view online for free.
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Introduction to DC Machines | SpringerLink
Due to specific construction of DC machines and the presence of mechanical commutator, which directs the electrical current into rotor conductors, ... Figure 11.20 shows cross section of a DC machine presenting basic elements of current circuits and magnetic circuits of DC machines. The figure does not show the commutator which …
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DC Motor
A DC motor is defined as a class of electrical motors that convert direct current electrical energy into mechanical energy. From the above definition, we can conclude that any electric motor that is operated using direct current or DC is called a DC motor. We will understand the DC motor construction and how a DC motor converts the supplied DC ...
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Principle of Operation of D.C. Machines
PRINCIPLE OF OPERATION. DC generator converts mechanical energy into electrical energy. when a conductor move in a magnetic field in such a way conductors cuts across a magnetic flux of lines and emf produces in a generator and it is defined by faradays law of electromagnetic induction emf causes current to flow if the conductor circuit is closed.
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What is a DC Machine? Basic structure & Equivalent circuit
Basic Structure of Electrical Machines. The rotating electrical or DC machine has mainly two parts; one is Stator, and another one is Rotar. The stator and rotor are separated from each other by an air gap. The stator is the outer frame of the machine and is immovable. The rotor is free to move and is the inner part of the machine.
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Operation, Construction, and Functionality of Direct Current Machines
As their many uses continue to grow, it has become apparent that understanding these machines is the key to understanding our future.Operation, Construction, and Functionality of Direct Current Machines brings together many concepts, from the most basic working principles and construction of DC machines to …
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DC Generator
E.M.F Equation of DC generator. The emf equation of the DC generator is given by the equation: (begin {array} {l}E_g=frac {Pphi ZN} {60 A}end {array} ) where. Z is the total number of armature conductor. P is the number of poles in a generator. A is the number of parallel lanes within the armature. N is the rotation of armature in r.p.m.
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DC Motors and Generators
DC machines are one of the three basic multiply-excited rotational electromechanical energy converters. Figure 1 shows an elementary doubly-excited magnetic system. ...
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DC Motor
Today dc motors are still found in many applications as small as toys and disk drives or in large sizes to operate steel rolling mills and paper machines. DC Motor Equations. The magnitude of flux experienced is. F=BlI. Where, B- Flux density due to flux produced by field windings. l- Active length of the conductor. I-Current passing through ...
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DC Machine: Basic Components and Function | EE …
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 …
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DC MACHINES Basic Structure of Electrical Machines
Thus, a DC generator or a DC moto r can be broadly termed as a DC machine. These basic constructional details are also valid for the construction of a DC motor . The above figure shows ...
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DC Machine – Construction, Working, Types and Applications
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. 1. Yoke or Frame The yoke is also known as the frame. It covers the internal parts of the … See more
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Elements of Electrical Machines
Lecture Notes Elements of Electrical Machines 12 Figure 2.3 : Torque in DC Motor Figure 4 : Current Flow in DC Motor Constructionally, there is no basic difference between a dc generator and motor. In fact, the same dc machine can be used interchangeably as a generator or as a motor. The basic construction of a dc
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Construction and Working Principle of DC Motors
Here is the schematic diagram of a DC Motor. A DC motor consists of six main parts, which are as follows. Yoke. The outer frame of a DC motor is a hollow cylinder made up of cast steel or rolled steel is known as yoke. The yoke serves following two purposes. It supports the field pole core and acts as a protecting cover to the machine.
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