constructional features of dc machines

Constructional Features & EMF Equation of a DC Generator ...

 · Constructional Features & EMF Equation of a DC Generator - MCQs with Answers Q1. Yoke in d.c. machine serves the outermost cover. For magnetic flux it provides a. A low reluctance path b. A high reluctance path c. Both (a) & (b) d. Does not provide path for magnetic flux View Answer / …

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4 Types of DC Motors and Their Characteristics

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.

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Characteristics of DC Machines | SpringerLink

 · Abstract. Working with DC machines requires the knowledge on their electrical and mechanical properties, parameters, and limitations. This chapter introduces and explains the concept of rated quantities and discusses the maximum permissible currents in continuous, steady-state service of DC machines. It also defines the safe operating area of ...

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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 generator. Also, we can entitle it as the construction of DC machine.

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Mod-01 Lec-22 Lecture-22-Constructional Features of DC ...

Week 7: DC machine constructional features and basic idea of its operation. Armature winding, commutator segments and brushes. Week 8: Lap and wave windings and number of parallel paths in armature circuit. Emf equation. Week 9: Torque equation. …

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Constructional Features of a Drilling Machine – RPA ...

 · Optimum 23. Aside from drilling, drilling machines are also used for countersinking, boring, counter boring, spot facing, reaming and tapping different materials such as wood, metal and concrete. Let''s identify the different parts of a drilling machine that contribute to these processes: 1. Head. The head is attached to the upper part of the column; it is the most important part of a ...

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What is a DC machine with a suitable sketch and the view ...

A DC Machine is an electromechanical device that is constructed such that it can be used as a Series, Shunt or Compound DC Generator OR DC Motor. Without trying to explain it with lots and lots of words, lets do it a thousand at a time: If you kno...

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Construction of dc machines

 · 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.

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Engineersinfo : Constructional Features of D.C Machines

 · Constructional Features of D.C Machines . 35.1 Goals of the lesson . In this lesson, important constructional features of a D.C machine are presented along with a discussion on D.C armature winding. Key Words: Field winding, armature winding, commutator segments & …

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Construction of DC generator | Direct current machine ...

 · The principle of single loop DC generator has been described for the basic understanding of DC generator working. Now we will discuss the construction and working of actual generator. The construction of DC generator and DC motor is same therefore instead of DC generator let say DC machine which is more appropriate and cover all aspect of DC motor and DC generator construction.

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DC Motor Working Principle, Construction and Diagram ...

 · CONSTRUCTION OF DC MOTOR. All DC machines mainly consist of two parts. One is the stator and the other is Rotor. The stator is a stationary part that includes yoke, pole, pole winding, and Interpoles. The stator produces the magnetic flux. The rotor of the dc machine consists of a commutator, brushes, compensating winding, and a shaft.

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Working or Operating Principle of DC Motor | Electrical4U

 · The DC motor is of vital importance for the industry today and is equally important for engineers to look into the working principle of DC motor in details that we have discussed in this article. To understand the operating principle of DC motor we need to first look into its single loop constructional feature. The very basic construction of a DC motor contains a current carrying …

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Basic construction and working 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 are described below. Yoke: The outer frame of a dc machine is called as yoke. It is made up of cast iron or steel.

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DC GENERATOR

Above figure shows the constructional details of a simple 4-pole DC generator. A DC generator consists two basic parts, stator and rotor. Basic constructional parts of a DC generator are described below. Yoke: The outer frame of a generator or motor is called as yoke. Yoke is …

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Types of DC Generator

Please go through the construction of dc generator before reading this article about different types of dc generator.. A DC generator requires MMF to establish flux in its magnetic circuit. The MMF necessary to establish flux in the magnetic circuit of a dc generator is obtained by field excitation.

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Characteristics of DC motors | electricaleasy

These above equations can be studied at - emf and torque equation of dc machine. For a DC motor, magnitude of the back emf is given by the same emf equation of a dc generator i.e. E b = PɸNZ / 60A. For a machine, P, Z and A are constant, therefore, N ∝ E b /ɸ Characteristics of DC series motors Torque vs. armature current (T a-I a)

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WORKING of DC GENERATOR with its CONSTRUCTION and TYPES

 · So, a DC generator can work as a DC motor and vice-versa. The basic constructional features of a DC generator are described below. YOKE: The yoke is the outer covering of the DC generator and is made of cast steel or cast iron. It serves two purposes: 1) Provides a path for pole flux. 2) Provides mechanical support to the whole machine. FIELD ...

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DC machine.pdf

Syllabus DC machine: Construction Emf and torque equations Speed control of DC motors 3 Construction 4 Constructional features of rotating electrical machines From the construction point of view the common essential features of all rotating electrical machines are: i.

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constructional features of dc machines

features of a speed control system for a DC machine D2 compare the construction and operation of two different types of stop/start/ retain relay control circuit for either an AC or a DC machine. P3 describe the aspects of legislation, regulations and standards that relate to work being carried out on two different pieces of electrical apparatus

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Construction of DC Machine (Generator & Motor)

 · So, these machines are used at a place where there is a requirement of single directional power. These machines are used in batteries to generate unidirectional power. This article gives an overview of a DC machine, which includes construction, working, parts, EMF equation, types, its losses, and applications.

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Dc Machine

In the first case, the induction machine is used as a motor to accelerate the flywheel and the dc motor, During the acceleration period the rotor current is maintained at its nominal value. When the speed reaches 700 rpm the dc machine picks-up and the acceleration rate increases, the flywheel being accelerated simultaneously by the two machines.

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Unit 31: Features and Applications of Electrical Machines

features of a speed control system for a DC machine P8 explain the features, characteristics and an application of a DC generator P9 describe the operation and use of a stop/start/retain relay control circuit for an AC or DC machine. M3 explain the use of a safety relay system and how its use addresses the issues raised in relevant

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Construction of DC Machine

 · Construction of DC Machine. 1. Yoke. Yoke. Function. It provide mechanical Support for poles. It also provide protection to whole machine from dust, moisture etc. It also carries magnetic flux produced by the poles. Yoke is also called as frame.

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DC Motor: Types, Parts, Construction, Working Principle ...

 · The construction of a DC shunt motor is similar to other types of DC motors, as shown in the figure. This motor can consist of basic parts such as field windings (stator), a commutator and an armature (rotor). The working principle of a DC shunt motor is whenever a DC motor is turned ON suddenly DC flows across the entire stator as well as the ...

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GATE & ESE

27 lessons • 5h 48m. 1. Overview of the Course. 10:36 mins. 2. Working Principle of DC Machine. 14:32 mins. 3. Constructional features of DC Machines.

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Construction Features Of DC Machines Flashcards by Chris ...

Study Construction Features Of DC Machines flashcards from Chris Taylor''s SAIT class online, or in Brainscape''s iPhone or Android app. Learn faster with spaced repetition.

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

Construction. A DC generator is also used as a DC motor without changing its construction. Therefore, a DC motor otherwise a DC generator can be generally called 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 core, armature winding, commutator & brushes.

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Construction of DC Machines

 · Construction of DC Machines. In the structure of DC machine either dc motor or generator, there are 2 main parts first one is the static or the second one is moving. The static part is stator and moving part is rotor. In stator of dc machine, there is a frame that provides protection and support to internal structure from external environment ...

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nstruction of a dc machine ppt

2000-1-6 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.

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Lesson-35 : D

35.3 Constructional Features Figure 35.1 shows a sectional view of a 4-pole D.C machine. The length of the machine is perpendicular to the paper. Stator has got 4 numbers of projected poles with coils wound over it. These coils may be connected in series in order that consecutive poles produce opposite

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Lecture dc machines

 · Constructional Features of DC Machines • Commutator along with the armature on the rotor • Salient-pole on the stator and, except for a few smaller machines, commutating poles between the main poles. • Field windings (as many as 4): – Two fields that act in a corrective capacity to combact the detrimental effects of armature reaction ...

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