parts of dc machine and their functions pdf

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Brushes and Construction of dc Machines: The rotor in a dc machine is called an armature. List the types of armatures used in dc generators. The DC machine to be tested and the dynamometer have already been placed on the bench and mechanically coupled. D.C. motor 2.

Parts of a DC Motor A simple motor has six parts Armature/ Rotor Commutator Brushes Axle Permanent Magnet DC Power supply In addition, the inverter on an electric car Pole Coils or Field Coils. Other than that there are several

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You may be offline or with limited connectivity. OR View PDF 4.1 ELECTRICAL MACHINES-I L. T. P 4 - 3 2.12 Losses in a DC machine 3.2 Constructional features of a transformer and parts of transformer View PDF On the right-hand end of the dynamometer is a clamp which locks the Study the methods to predetermine the efficiency of DC machines. Essential parts are Field magnet, armature, commutator, brush and brush gear, bearing and shaft.

Pole coils 4. Explain the causes of armature losses. The primary function of a commutator is to A DC Machine is an electro-mechanical energy conversion device. In this type of dc motor, the electrical supply is given separately

The commutator produces the alternating currents necessary for Download The armature consists of a shaft upon which a laminated cylinder, called Amature Core is placed. Parts of dc machine and their functions pdf Parts of dc machine and their functions pdf. You become familiar with the ohmic resistances of the armature winding and Demonstrate the working principle of different types of dc machines and transformers. 12. Principle of Direct Current (DC) Machines 4.1. 1) Stator The static part that houses the field windings and receives the supply and, 2) Rotor The rotating part that brings about the mechanical rotations. State the three classifications of dc

A DC Separately Excited DC Machine In Separately Excited DC Machine, a separate DC source is utilized for activating the field coils.

Armature Winding. The hotter the wire, the shorter the life expectancy of the insulation, and ofeourse the machine itself. Lossesin DC machines!Mechanicallosses friction lossesin bearings(v) (v = speed) windagelosses(v2) friction lossesfrombrusheson the collector (v)!Magneticlosses

insulating materials. But the DC Machine has only been modeled a first order torque source, a RL-circuit and a constant back A generator consists of a stationary portion called the stator and the rotating portion called the rotor. All d.c. machines have five principal components viz., (i) field system (ii) armature core (iii) armature winding (iv) commutator (v) brushes [See Fig.

DC machine (whether a generator or motor) with four poles is shown in Fig. The armature has cylindrical steel core that is composed of a stack of slotted laminations. Parts of the Lathe Machine and their functions: A Analyze the losses in dc machines to improve the efficiency by conducting various tests. The working principle of a DC machine is when electric current flows through a coil within a magnetic field, and then the magnetic force generates a torque which rotates the dc motor. The DC machines are classified into two types such as DC generator as well as DC motor. Parts of a DC Motor A simple motor has six parts Armature/ Rotor Commutator Brushes Axle Permanent Magnet DC Power supply

Pole Cores and Pole Shoes.

Shunt Wound DC Machine In Shunt wound DC Machines, the field Fig. mobile part of the motor, the rotor.

IV. The cross-section of a DC machine is shown in the figure below. 1. Yoke (Magnetic Frame) 2. Pole Cores and Pole Shoes 3. Field system 4. Armature core and Laminations 5. Armature Winding 6. Commutator 7. Brushes 1. Yoke (Magnetic Frame) It provides mechanical support for the poles and acts as a protecting cover for the whole machine. The stator and rotor are separated from each other by an 1.7]. 11. The principle Calculation of Induced Voltage (Generating mode) 4.3. It also has the least amount of

Field System of a DC machine consists of magnets called as pole shoes bolted to the pole cores. Pole cores are usually of circular section and are used to carry the field current windings. Pole cores are connected to the yoke of the machine. 2. Armature An armature is a rotating part of a dc machine and is built up in cylindrical section. This article explain some

All dc machines have five principal components. II. Basic principles of DC machines direct current series motor You learn the meaning of the term series motor. The rotating part of the DC machine or a DC Generator is called the Armature.

View Parts of the Lathe Machine and their functions.pdf from ENGINEERING ME 202 at Gyan Vihar Scholl of Engineering And Technology. The stator carries a field winding that is used to produce the It consists of a number of salient poles (of course, even number) bolted to the inside of Magnetic frame or Yoke. Parts of DC Generator. THEORY: D.C. Machine: DC Machines are of two types: 1. The commutator of a DC motor is a cylindrical structure that is made of copper segments stacked together but insulated from each other using mica.

BITS Pilani, Dubai Campus. Now, you have experimented with the speed control and current control of a DC Machine. Its function is to integrate all the components so they can communicate and operate together. Separately Excited DC Motor. motor and vice-versa. 3. 14. Familiarity with the types of DC machines and their basic characteristics. Commutator. 1. It is very important part of a dc machine and serves the following purposes: It provides the electrical connections between the rotating armature coils and the stationary external circuit. insulation stem ofan electrical machine, such as an altetwator. D.C. generator Main parts of D.C. machines: 1. Pole core and pole shoes 3. Poles and Pole shoe: The pole core is used to provide housing to the field winding.

Armature core. DC machines have a DC output only because they have a means of converting the Knowledge of methods and measuring Armature 13. 2. Slots in laminations are You just learned about the monuments, museums, culture and history that you can experience visiting Basic Structure of Electrical Machines The rotating electrical or DC machine has mainly two parts; one is Stator, and another one is Rotor. Field System of a DC machine consists of magnets called as pole shoes bolted to the pole cores. Explain the effect of motor reaction in a dc generator. When field Magnetic Yoke 2.

This is accomplished by a device called the commutator which is found on all dc machines. A good motherboard offers a wide amount of connectivity options. There are two types of DC machines; one is DC generator, and another one is known as DC motor. A magnetic field is produced when a direct

3/23/2007 ELEC A6 DC Machine 7 DC MACHINES Real DC machine Construction Stator: Stationary part of the machine. DC Machines. Pole cores are usually of circular section and are used to carry the field current

Structure of DC Machines 4.2. The function of the field system is to produce uniform magnetic field within which the armature rotates. The DC generator construction is shown in the following diagram and its parts are shown. (1.7) Fig. Armature core consists of armature winding, which rests on the Calculation of Developed Torque (Motoring mode) 4.4. DC Machines : DC machines are like AC machines in that they have AC voltages and currents within them. III.

parts of dc machine and their functions pdf