Regardless of size, all electrical generators, whether dc or ac, depend upon the principle of magnetic induction. By the way the stator windings are arranged, the magnetic field appears to. This is the basic working principle of induction motor of either type, single phase of three phase. The name vector control originates from the basic principle of this type of. Working principle of an induction motor the motor which works on the principle of electromagnetic induction is known as the induction motor. Ac induction motors are also the most common motors used in main powered home appliances. Understand and define the different elements of a protection system. In the dc motor, we give one supply to the stator and another to the rotor through brush arrangement. Its operation is based on the principle that when a current carrying conductor is placed in a. The motor is mounted in a test rig that allows one to control the torque applied to the motor shaft and to measure both rpm and torque.
An electrical motor is an electromechanical device which converts electrical energy into mechanical energy. Induction motors are the most commonly used motors in many applications. Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. We need to give double excitation to make a dc motor to rotate. Record all nameplate information for the induction motor. Mostafa elshahed objectives learn a brief history of the electrical power systems construction. Installation and maintenance threephase induction motors. An induction motor is based on the principle of induction of voltages and currents. Differentiate between the various types of generating electric power stations. Lecture 6 three phase induction motors cairo university. You should also make a dc measurement of stator winding linetoline resistance using a dmm.
The motor which works on the principle of electromagnetic induction is known as the induction motor. Equivalent circuit of an induction motor enables the performance characteristics which are evaluated for steady state conditions. The induction motor is made up of the stator, or stationary windings, and the rotor. In the case of three phase ac alternating current operation, the most widely used motor is a 3 phase induction motor, as this type of motor does not require an additional starting device. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
As a voltage and a current is applied to the stator winding terminals, a magnetic field is developed in the windings. The equivalent circuit of an induction motor is similar to that of the transformer. These are also called as asynchronous motors, because an induction motor always runs at a speed lower than synchronous speed. But in induction motor, we give only one supply, so it is interesting to know how an induction motor works. An electrical motor is a device that has brought about one of the biggest advancements in the fields of engineering and technology ever since the invention. The electromagnetic induction is the phenomenon in which the electromotive force induces across the electrical conductor when it is placed in a rotating magnetic field.
Working principle of an induction motor circuit globe. The stator and rotor are two essential parts of the motor. Dc motors although ac motors are used in most of the cases, dc motors have many applications and used for multipurpose applications. Synchronous speed means the speed of the rotating magnetic field in the stator.
The voltage and current is induced in the rotor circuit from the stator circuit for the operation. The threephase induction motor is the extensively used for various kinds of industrial drives. Learn the principle of power factor improvement and evaluating the cost of electricity. Squirrel cage wound rotor with slip rings the rotating magnetic field the basic idea of an electric motor is to generate two magnetic fields. The threephase induction motor is the extensively used for various. Dc motor principle a machine that converts dc power into mechanical energy is known as dc motor.
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