dc machines construction pdf

04-Jul-2022

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A Direct Current (DC) machine is an energy conversion device. It converts electrical energy to mechanical while working as a motor and the mechanical energy to electrical energy while working as the generator. Hence, it is known as electromechanical energy conversion device. It consists of stator and rotor.

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A DC Machine is an electro-mechanical energy conversion device. There are two types of DC machines; one is DC generator, and another one is known as DC motor. A DC …

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A d.c. shunt motor is being considered as a drive for different mechanical loads having the following characteristics: (a) Constant power ( ωmTm ); (b) constant torque and (c) torque proportional to speed. It is desired to know the effects on armature current and speed of making various changes on the electrical side.

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DC Machines Construction The commutatorswitches the current from one rotor coil to the adjacent coil, The switching requires the interruption of the coil current. The sudden …

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The main parts used in the construction of DC motorare the yoke, poles, field winding, commutator, carbon brushes bearings, etc. A brief description of the various parts is as follows: Yoke The yoke acts as the outer cover of a DC motor and it is also known as the frame.

04-Jul-2022

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A DC motor is an electromechanical energy conversion device, which converts electrical energy input into the mechanical energy output. The operation of the DC motor is based on the principle that when a current carrying conductor is placed in a magnetic field, a mechanical force acts on the conductor. The magnitude of the force is given by,

04-Jul-2022

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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. It not only provides mechanical strength to the whole assembly but also carries the magnetic flux produced by the field winding.

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DC Machines . BITS Pilani, Dubai Campus Example : An 8kW, 200-V dc generator has a full load current of 40nA at 1200rpm. Given the armature resistance is Ra=0.5Ω, armature is modeled as shown below, where RL is a resistive load. Determine the full load voltage for ... construction of the generator. DC Machines v

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Real DC machines have a similar construction to the four-pole machine considered except they have more loops and moremachine considered, except they have more loops and more commutation segments. EEL 3211 (© 2008, H. Zmuda) 7. DC Machines 38. Practical Issues Associated with Commutation 1. Armature reaction – Current flowing in the rotor ...

04-Jul-2022

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machine consists 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 …

04-Jul-2022

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Construction of DC Machine Yoke Another name of a yoke is the frame. The main function of the yoke in the machine is to offer mechanical support intended for poles and protects the entire machine from the moisture, dust, etc. The materials used in the yoke are designed with cast iron, cast steel otherwise rolled steel.

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A DC machine is an electromechanical device that is used to convert electrical energy into mechanical energy or vice versa. The DC machine used to convert electrical energy into …

04-Jul-2022

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Construction Parts of the machine It consists of a Yoke, pole core, pole shoe, armature core, commutator, brushes, bearings, and fan. The yoke is used for the protection of …

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Abstract The DC machine has become a major concern in recent years. The simplest of operation principles of DC motor and generator was explained in this paper. The analysis of voltage...

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DC Machines Construction • Stator: Stationary part of the machine. The stator carries a field winding that is used to produce the required magnetic field by DC excitation. Often know as the field. • Rotor: The rotor is the rotating part of the machine. The rotor carries a distributed winding, and is the winding where the emf is induced.

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Also, some DC motors have more than one field coil Generating mode : Ia flows in the direction of Ea V (terminal voltage) = Ea Ia Ra Pmech (in gross) = Ea Ia + rotational losses (mechanical …

04-Jul-2022

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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 …

04-Jul-2022

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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. Material used For small M/C yoke is made of cast iron. For large M/C it is made of cast steel or rolled steel.

04-Jul-2022

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DC machines- DC generators can be used to learn Construction of Simple Loop Generator, Working of Simple Loop Generator, Simple Loop Generator, Separately Excited DC Generator, Self Excited Shunt DC Generator, Self Excited Series DC Generator, Voltage Regulation, Loss in a DC Generator, E.M.F Equation of DC Generator . Technical Details

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DC MACHINE CONSTRUCTION - Read online for free. Scribd is the world's largest social reading and publishing site. Open navigation menu. Close suggestions Search Search. en Change Language. close menu Language. English (selected) Español;

04-Jul-2022

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A DC machine consists of two basic parts; stator and rotor. Basic constructional parts of a DC machine are described below. Yoke, The yoke is the outside frame of a DC machine. It's …

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DC Generator Construction MCQ Question 1 Download Solution PDF Which of the following machines do NOT use equalizer rings? 4-pole duplex wave-wound DC machine 6-pole simplex lap-wound DC machine 4-pole simplex wave-wound DC machine 4-pole simplex lap-wound DC machine Answer (Detailed Solution Below) Option 3 : 4-pole simplex wave-wound …

04-Jul-2022

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Construction of DC Machine The construction of 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, brushes & bearings. Some of the parts of the DC machine is discussed below. Yoke Another name of a yoke is the frame.