working principle of motor and generator pdf

Working principle of motor and generator pdf

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What is a DC Generator : Construction and Its Working

Electric motor

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Question 1 What is an electric motor? Question 2 On what principle does electric motor works? Question 3 Explain the construction of electric motor?

Generators are useful appliances that supply electrical power during a power outage and prevent discontinuity of daily activities or disruption of business operations. Generators are available in different electrical and physical configurations for use in different applications. In the following sections, we will look at how a generator functions, the main components of a generator, and how a generator operates as a secondary source of electrical power in residential and industrial applications. An electric generator is a device that converts mechanical energy obtained from an external source into electrical energy as the output. Instead, it uses the mechanical energy supplied to it to force the movement of electric charges present in the wire of its windings through an external electric circuit.

What is a DC Generator : Construction and Its Working

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A commutator is a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine. Two or more electrical contacts called " brushes " made of a soft conductive material like carbon press against the commutator, making sliding contact with successive segments of the commutator as it rotates. The windings coils of wire on the armature are connected to the commutator segments. Commutators are used in direct current DC machines: dynamos DC generators and many DC motors as well as universal motors. In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force torque is produced.

Electric motor

The electric generator was invented before the correlation between electricity as well as magnetism was discovered. These generators use electrostatic principles to operate with the help of plates, moving belts which are charged electrically as well as disks to carry charge toward an electrode with high potential. Generators use two mechanisms to generate the charge like the triboelectric effect otherwise electrostatic induction. So, it generates low current as well as very high voltage due to the complexity of insulating machines as well as their inefficiency. The power ratings of Electrostatic generators are low so they never utilized for electrical power generation.

The Electric Motor and Generator are differentiated on various factors like the main principle of working or function of the motor and generator. Consumption or production of electricity, its driven element, the existence of the current in the winding. The Difference Between the Motor and the Generator are explained below in the tabulated form. The motor and the generator are almost similar from the construction point of view, as both have stator and rotor. The main difference between the two is that the Motor is an electric device which converts electrical energy into mechanical energy. The generator is vice versa of that motor.

current (dc) motor or generator, the induction motor or generator, and a number comprehend the physical principles governing the operation of electric rotating.

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Schematics and operation of different types of motor DC motors Motors and generators Alternators Back emf 'Universal' motors Build a simple motor AC motors synchronous and stepper motors Induction motors Squirrel cage motors Three phase induction motors Linear motors Homopolar motors and generators separate page. For example, the animation at right has just one loop of wire, no bearings and a very simple geometry. Real motors use the same principles, but their geometry is usually complicated.

Basic construction and working of a DC Generator.

A dynamo is an electrical generator that creates direct current using a commutator. Dynamos were the first electrical generators capable of delivering power for industry, and the foundation upon which many other later electric-power conversion devices were based, including the electric motor , the alternating-current alternator , and the rotary converter. Today, the simpler alternator dominates large scale power generation , for efficiency, reliability and cost reasons.

What is an Electric Generator?

The initial electromagnetic generator Faraday disk was invented by British scientist namely Michael Faraday in the year A DC generator is an electrical device used for generating electrical energy. The main function of this device is to change mechanical energy into electrical energy. There are several types of mechanical energy sources available such as hand cranks, internal combustion engines, water turbines, gas and steam turbines. The generator provides power to all the electrical power grids.


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