Synchronous motor and induction motor are the most widely used types of AC motor. Construction of a synchronous motor is similar to an alternator (AC generator).A same synchronous machine can be used as a …
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Electrical Transformer - Basic construction, working and types. Electrical transformer is a static electrical machine which transforms electrical power from one circuit to another circuit, without changing the frequency. Transformer can increase or decrease the voltage with corresponding decrease or increase in current.
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Electrical Machines Notes PDF. Date: 28th Aug 2023. In these "Electrical Machines Notes PDF", we will study High Voltage Electrical and Electronic systems.It deals with the working, construction, and principle of DC and AC machines. These notes cover the concept of control of speed, generation of Torque, various losses, efficiency, etc. of …
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Introduction to DC Machines. DC Machines are types of electrical machines that use dc current in the case of dc motors and generates dc voltages in …
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There is no basic difference in the construction of a DC generator and a DC motor.. In fact, the same DC machine can be used interchangeably as a generator or as a motor. Like generators, there are different types of DC motors which are also classified into shunt-wound, series-wound and compound-wound dc motors.. DC motors are …
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Parts of the dc generator. A DC generator is often used as a DC generator motor without altering its construction. So, a dc generator motor may usually be called a DC machine. The key parts of DC generators are yoke, poles, pole shoes, armature core, armature winding, commutator, brushes, magnetic field system, commutator, end …
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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 ...
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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, …
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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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A DC Generator is an electrical device which converts mechanical energy into electrical energy. It mainly consists of three main parts, i.e. magnetic field system, armature and commutator and brush gear. The other parts of a DC Generator are magnetic frame and yoke, pole core and pole shoes, field or exciting coils, armature core and windings, …
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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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Self-excited DC machines: In this type, field winding and armature winding are interconnected in various ways to achieve a wide range of performance characteristics (for example, field winding in series or parallel with the armature winding). In a self-excited type of DC generator, the field winding is energized by the current produced by ...
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Yoke of DC Machine. The modern process of forming the yoke consists of rolling a steel slab around a cylindrical mandrel and then welding it at the bottom. The feet and the terminal box etc. are welded to the frame afterward. Such yokes possess sufficient mechanical strength and have high permeability. 2.
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Practical DC Motor consists of field windings to provide the magnetic flux and armature which acts as the conductor. Brushless DC Motor. The input of a brushless DC motor is current/voltage and its output is torque. Understanding the operation of the DC motor is very simple from a basic diagram is shown below.
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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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Basic working principle of an Induction Motor. In a DC motor, supply is needed to be given for the stator winding as well as the rotor winding. But in an induction motor only the stator winding is fed with an AC supply. Alternating flux is produced around the stator winding due to AC supply. This alternating flux revolves with synchronous speed.
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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 …
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Electric Generator: An electric generator is an electrical machine which converts mechanical energy into electrical energy. A generator works on the principle of electromagnetic induction. It states that whenever a conductor moves in a magnetic field, an emf gets induced within the conductor. This phenomenon is called as generator action.
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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 …
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The DC type machines are normally used in small applications whereas the AC type has its importance in a wide range of applications. Because the AC machines have more advantages compared to that of DC machines. In this article, we shall discuss what is AC motor, construction, working principle, types, speed control, and applications. AC …
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A DC Machine is an electro-mechanical energy conversion device. There are two types of DC machines; one is the DC generator, and another one is known as DC motor. A DC generator converts mechanical power (ωT) …
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Construction of AC synchronous generator (alternator) The main parts of an alternator, obviously, consists of a stator and a rotor. But, unlike other machines, in most of the alternators, field exciters are rotating and the armature coil is stationary. Stator: Unlike in a DC machine, the stator of an alternator is not meant to serve a path for ...
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DC Motor – Working Principle Consider a two polar DC motor as shown in figure. When motor terminals are connected to DC mains, field gets excited and alternate N-pole and S-pole is created. Armature conductors under N-pole carry current in one direction while conductor carry current in opposite direction as shown in figure.
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a description of the basic laws of physics governing the operation of the syn-chronous electric machine, which is the type of machine all turbogenerators belong to. 1.1 INTRODUCTION TO BASIC NOTIONS ON ELECTRIC POWER 1.1.1 Magnetism and Electromagnetism Certain materials found in nature exhibit a tendency to attract or …
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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 …
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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.
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A synchronous motor is a doubly excited machine i.e. it requires AC and DC supply for both parts stator as well as rotor to achieve synchronism. A three-phase AC is supplied to the stator's windings to generate RMF. The stator is designed to …
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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.
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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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Construction of AC Generator. The roles of each of these AC generator components are listed below. Field- The field is made up of conductor coils that receive electricity from the source and generate magnetic flux. The armature is cut by the magnetic flux in the field, which produces a voltage. This voltage is the AC generator's output voltage.
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Final Words Basic Components of a DC Machine Each DC machine contains two separate terminals with a magnetized center …
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Basic construction and working of a DC Generator. Speed control methods of DC motor; Hydroelectric Power Plant : Layout, Working and Types; Working principle and types of an Induction Motor; Labels. Power System (41) AC Machines (24) Miscellaneous (24) DC Machines (18) Transformer (16) Overhead lines (12) Induction Motor (11) Miscellaneous ...
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The frame is casted for small machines and it is fabricated for a large machine. According to the applications, the frame is made up of die-cast or fabricated steel, aluminum/ aluminum alloys, or stainless steel. Related Post: DC Machine – Construction, Working, Types and Applications; Stator Core
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A universal motor is a special type of motor which is designed to run on either DC or single phase AC supply. These motors are generally series wound (armature and field winding are in series), and hence produce high starting torque (See characteristics of DC motors here). That is why, universal motors generally comes built into the device they ...
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It is made up of cast steel for large dc motors. And of cast iron for small dc motors. The yoke is used in DC machines because: A) It provides mechanical support to poles. B) Acts as a protective cover against …
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A DC motor is an electrical machine that converts electrical energy into mechanical energy. In a DC motor, the input electrical energy is the direct current which is transformed into the mechanical rotation. In this …
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