Basic principle of dc generator and dc motor pdf
File Name: basic principle of dc generator and dc motor .zip
Premium Membership. Learn from experienced power engineers. The electrical machines deals with the energy transfer either from mechanical to electrical form or from electrical to mechanical form, this process is called electromechanical energy conversion. An electrical machine which converts mechanical energy into electrical energy is called an electric generator while an electrical machine which converts electrical energy into the mechanical energy is called an electric motor. A DC generator is built utilizing the basic principle that emf is induced in a conductor when it cuts magnetic lines of force.
Basic construction and working of a DC Generator.
All the generators works on a principle of dynamically induced e. The relative motion can be achieved by rotating conductor with respect to flux or by rotating flux with respect to a conductor. So a voltage gets generated in a conductor, as long as there exists a relative motion between conductor and the flux. Such an induced e. In a particular generator, the conductors are rotated to cut the magnetic flux, keeping flux stationary. To have a large voltage as the output, the number of conductors are connected together in a specific manner, to form a winding.
Typically, these motors are deployed in equipment that requires some form of rotary or motion-producing control. Direct current motors are essential components in many electrical engineering projects. DC motors fall into different categories, depending on their construction. The most common types include brushed or brushless, permanent magnet, series, and parallel. These brushes are usually kept in close proximity to the commutator.
Principle of DC Generator
A DC motor is any of a class of rotary electrical motors that converts direct current electrical energy into mechanical energy. The most common types rely on the forces produced by magnetic fields. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current in part of the motor. DC motors were the first form of motor widely used, as they could be powered from existing direct-current lighting power distribution systems. A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings. Small DC motors are used in tools, toys, and appliances. The universal motor can operate on direct current but is a lightweight brushed motor used for portable power tools and appliances.
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. The reverse function of the generator can be done by an electric motor.
Now there are two possibilities:. This is produced by a permanent magnet or electromagnet. The electromagnet consists of silicon steel core and copper windings. It consists of armature made of silicon steel having slots and teeth. Copper windings are placed in the slots of rotating armature. The voltage induced is given by where B is flux density. Let us consider an elementary two pole generator as shown in Figure 1.
Explain the effect of motor reaction in a dc generator. Explain generator. Basic generating principles Voltage control is either (1) manual or (2) automatic.
DC Machines v. The DC generator can operate at any speed within mechanical limits but always outputs a Construction Mining Production Line Products This article outlines basic construction and working of a DC
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.
Equivalent Circuit of a DC Machine Armature
ГЛАВА 96 Промокшая и дрожащая от холода, Сьюзан пристроилась на диванчике в Третьем узле. Стратмор прикрыл ее своим пиджаком. В нескольких метрах от них лежало тело Хейла. Выли сирены. Как весенний лед на реке, потрескивал корпус ТРАНСТЕКСТА. - Я спущусь вниз и отключу электропитание, - сказал Стратмор, положив руку на плечо Сьюзан и стараясь ее успокоить. - И сразу же вернусь.
Хорошо. Это на нижнем этаже. Возле фреоновых помп. Сьюзан повернулась и направилась к двери, но на полпути оглянулась. - Коммандер, - сказала. - Это еще не конец. Мы еще не проиграли.
Конец лета. Солнце уже зашло.