Its operation is based on the principle that when a current carrying conductor is placed in a. This conversion is usually obtained through the generation of a magnetic field by means of a current flowing into one or more coils. Ac motors ac motors are used worldwide in many applications to transform electrical energy into mechanical energy. Lecture notes institute of aeronautical engineering. Dc motors although ac motors are used in most of the cases, dc motors have many applications and used for multipurpose applications. Mechanical energy what is an electric motor an electric motor is a device converting electrical energy into mechanical energy usually a torque. Xux, of course, and in a permanent magnet this is usually pictured in terms of atomiclevel.
Unit 16 electric motors objectives after studying this unit, the student will be able to state the purpose of an electric motor. The disadvantage of this type of rotor is that the motor behavior cannot be altered by connecting anything to the rotor there are no rotor terminals. Lecture notes electrical machine ii bee 1401 page 1. Ac induction motors are also the most common motors used in main powered home appliances. Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. Types of electric motors electric motors dc motors other motors h ac motors s unt motor separately excited induction motor stepper motor motor brushlessdc motor series motor hysteresis motor permanent magnet dc pmdc synchronous motor reluctance motor compounded motor universal motor. Unit 16 electric motors washington state university. Umanand, principal research scientist, power electronics group, cedt, iisc bangalore for more detail. The basic idea of an electric motor is to generate two magnetic fields. The most common type of ac motor being used throughout the work today is the induction motor. This section gives a very brief introduction to the most prevalent electrical actuators.
Syllabus of bachelor of technology in electrical engineering 4th semester electrical machinesii. The most common type of ac motor being used throughout the work today is the induction. The induction machine behaves like a transformer, transferring electrical energy from. Lecture series on basic electrical technology by prof. The threephase induction motor is the extensively used for various kinds of industrial drives.
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