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Electric Drives Concepts And Applications Pdf

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[PDF] A First Course on Electrical Drives By S.K. Pillai Book Free Download

Definition : The system which is used for controlling the motion of an electrical machine, such type of system is called an electrical drive. In other words, the drive which uses the electric motor is called electrical drive.

The electrical drive uses any of the prime movers like diesel or a petrol engine, gas or steam turbines, steam engines, hydraulic motors and electrical motors as a primary source of energy. This prime mover supplies the mechanical energy to the drive for motion control. The block diagram of the electrical drive is shown in the figure below.

The electrical load like fans, pumps, trains, etc. The requirement of an electrical load is determined regarding speed and torque. The motor which suited the capabilities of the load is chosen for the load drive. The main parts of the electrical drives are power modulator, motor, controlling unit and sensing units. Their parts are explained below in details.

It controls the power from the source to the motor in such a manner that motor transmits the speed-torque characteristic required by the load.

During the transient operations like starting, braking and speed reversing the excessive current drawn from the source. This excessive current drawn from the source may overload it or may cause a voltage drop. Hence the power modulator restricts the source and motor current. The power modulator converts the energy according to the requirement of the motor e. It also selects the mode of operation of the motor, i. The control unit also operates the power modulator as desired. It also generates the commands for the protection of power modulator and motor.

An input command signal which adjusts the operating point of the drive, from an input to the control unit. It mainly required either for protection or for closed loop operation. The electric drives have many advantages shown above. The only disadvantage of the drive is that sometimes the mechanical energy produced by the prime mover is first converted into electrical energy and then into a mechanical work by the help of the motor.

This can be done by the help of the electrical link which is associated with the prime mover and the load. Because of the following advantages, the mechanical energy already available from a non-electrical prime mover is sometimes first converted into electrical energy by a generator and back to a mechanical energy of an electrical motor.

Electrical link thus provides between the non-electrical prime mover and the load impact to the drive flexible control characteristic. For example — The diesel locomotive produces the diesel energy by the help of the diesel engine.

The mechanical energy is converted into an electrical energy by the help of the generator. This electrical energy is used for driving the other locomotive. It is used in a large number of industrial and domestic applications like transportation systems, rolling mills, paper machines, textile mills, machine tools, fans, pumps, robots and washing, etc. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment.

Skip to content Definition : The system which is used for controlling the motion of an electrical machine, such type of system is called an electrical drive. Leave a Comment Cancel Reply Your email address will not be published.

Electric Drives: Concepts And Applications

Pillai — The aim of revision is mainly to acquaint the students with the recent trends in the development of electric motors used as prime movers in electric drive systems. The reason is the electronic devices divert your attention and also cause strains while reading eBooks. He had taught subjects like Electrical Machines and Drives for both undergraduate and postgraduate students in electrical engineering for about three decades. EasyEngineering team try to Helping the students and others who cannot afford buying books is our aim. For any quarries, Disclaimer are requested to kindly contact us , We assured you we will do our best.

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Definition : The system which is used for controlling the motion of an electrical machine, such type of system is called an electrical drive. In other words, the drive which uses the electric motor is called electrical drive. The electrical drive uses any of the prime movers like diesel or a petrol engine, gas or steam turbines, steam engines, hydraulic motors and electrical motors as a primary source of energy. This prime mover supplies the mechanical energy to the drive for motion control. The block diagram of the electrical drive is shown in the figure below. The electrical load like fans, pumps, trains, etc.


Book. Language English. Title. Electric drives concepts and applications. Author(​S) Vedam Subrahmanyam (Author). Publication. Data. New York: McGraw-Hill.


[PDF] A First Course on Electrical Drives By S.K. Pillai Book Free Download

Pillai — The aim of revision is mainly to acquaint the students with the recent trends in the development of electric motors used as prime movers in electric drive systems. The reason is the electronic devices divert your attention and also cause strains while reading eBooks. He had taught subjects like Electrical Machines and Drives for both undergraduate and postgraduate students in electrical engineering for about three decades.

An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor's shaft. Electric motors can be powered by direct current DC sources, such as from batteries, or rectifiers , or by alternating current AC sources, such as a power grid, inverters or electrical generators.

Electrical Drive

Electric drives concepts and applications pdf

The first electric drive was invented in by B. Iakobi in Russia. He tested a DC motor which is supplied from a battery to push a boat.

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19: ОШИБКА В СИСТЕМНОМ РАЗДЕЛЕ 20: СКАЧОК НАПРЯЖЕНИЯ 21: СБОЙ СИСТЕМЫ ХРАНЕНИЯ ДАННЫХ Наконец она дошла до пункта 22 и, замерев, долго всматривалась в написанное. Потом, озадаченная, снова взглянула на монитор. КОД ОШИБКИ 22 Сьюзан нахмурилась и снова посмотрела в справочник. То, что она увидела, казалось лишенным всякого смысла. 22: РУЧНОЕ ОТКЛЮЧЕНИЕ ГЛАВА 35 Беккер в шоке смотрел на Росио. - Вы продали кольцо.

Advantages of Electrical Drive

Простая синтаксическая ошибка - если бы, например, программист по ошибке ввел вместо точки запятую - могла обрушить всю систему. Происхождение термина вирус всегда казалось Сьюзан весьма забавным. Этот термин возник еще во времена первого в мире компьютера Марк-1 - агрегата размером с комнату, построенного в 1944 году в лаборатории Гарвардского университета. Однажды в компьютере случился сбой, причину которого никто не мог установить. После многочасовых поисков ее обнаружил младший лаборант. То была моль, севшая на одну из плат, в результате чего произошло короткое замыкание. Тогда-то виновников компьютерных сбоев и стали называть вирусами.

Инструкция по ее изготовлению была проста, как рецепт приготовления жженого сахара. - Плутоний и уран, - повторял Джабба.  - Переходите к главному. - Вернитесь назад, - приказала Сьюзан.  - Документ слишком объемный.

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 Какого чер… В распечатке был список последних тридцати шести файлов, введенных в ТРАНСТЕКСТ. За названием каждого файла следовали четыре цифры - код команды добро, данной программой Сквозь строй.

 - Она вздохнула.  - Быть может, придется ждать, пока Дэвид не найдет копию Танкадо. Стратмор посмотрел на нее неодобрительно.

 Спасибо за подсказку, - сказал Стратмор.  - У ТРАНСТЕКСТА есть автоматический выключатель. В случае перегрева он выключится без чьей-либо помощи. - Вы сумасшедший, - с презрением в голосе ответил Хейл.  - Мне наплевать, даже если ваш ТРАНСТЕКСТ взлетит на воздух.

 Давайте скорее. Попробуем порыскать. ГЛАВА 125 - Сколько у нас времени? - крикнул Джабба. Техники в задней части комнаты не откликнулись.

 - Он провел рукой по подбородку, на котором темнела полуторасуточная щетина.  - А что Следопыт.

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Ractentlefer 07.05.2021 at 16:12

Download ELECTRIC DRIVES: CONCEPTS AND APPLICATIONS free book PDF Author: Vedam Subrahmanyam Pages: ISBN:

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