An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor can therefore be made without electrical connections to the rotor.
How does an induction motor works?
The magnet fields induced within the rotor are attracted to the magnetic field being produced by the stator, following it as it rotates with each half-cycle of alternating current. This type of motor is called an induction motor because the magnetic field created in the stator induces a magnetic field in the rotor.
What is meant by induction motor?
: an alternating-current motor in which torque is produced by the reaction between a varying magnetic field generated in the stator and the current induced in the coils of the rotor.
What is induction motor and its application?
Induction machines are the most frequently-used type of motor used in residential, commercial, and industrial settings so far. Used in different applications, induction motors are also called Asynchronous Motors. This is because an induction motor always runs at a slower speed than synchronous speed.
What are the advantages of induction motor?
Advantages of an induction motor (IM): The working of an induction motor is very simple. It is very cheap in cost to compare the other motors. It is a highly efficient motor. The brushes are not used in an induction motor. The maintenance of IM is very less compared to the DC motor and synchronous motor.
What is the principle of a motor?
The principle of an electric motor is based on the current carrying conductor which produces magnetic field around it. A current carrying conductor is placed perpendicular to the magnetic field so that it experiences a force.
What are the types of induction motor?
Induction motors are classified into two types namely single phase induction motor and three-phase induction motor. As their name suggests, a 1-phase induction motor is connected to a single-phase AC power supply whereas the 3-phase induction motor can be connected to a three-phase AC power supply.
Where is induction motor used?
These are the most common type of AC motor and are important to industry due to their load capacity, with Single-Phase induction motors being used mainly for smaller loads, for example in household appliances whereas, Three-Phase induction motors are used more in industrial applications including compressors, pumps, May 5, 2016.
Why is it called induction motor?
This type of engine is also known as an induction motor. The asynchronous motor is based on the currents induced in the rotor from the rotating magnetic field of the stator. That’s why it’s called an induction machine.
What is the cost of induction motor?
Questions & Answers on Induction Motors No of Phase Min Price Max Price Single Phase Rs 2200/Piece Rs 22093/Piece Three Phase Rs 2100/Piece Rs 47148/Piece.
What is induction motor example?
Examples: Compressor, Crushers, Conveyors, etc. Class D Motor: Highest Starting torque of all the class motor, low starting current and high operating slip. This type of motors has low efficiency suitable for intermediate loads. Examples: Bulldozers, Die stamping, etc.
What are two types of induction motor?
Single-phase induction motors and three-phase induction motors are the two main types of induction motors. As their names imply, a single-phase induction motor is connected to a 1 phase AC power supply and a three-phase induction motor is provided with 3 phase AC power supply.
What are the main parts of induction motor?
Parts of Induction Motors Stator. The stator is the stationary portion of the motor and delivers a rotating magnetic field to interact with the rotor. Rotor. The rotor is the central component of the motor, and is fixed to the shaft. Shaft. The motor shaft is fixed within the rotor, and rotates with it. Bearings. Casing.
What is advantage and disadvantage of induction motor?
Induction motors always operate under lagging power factor and during light load conditions they operate at very worst power factor (0.2 to 0.4 lagging). Some of the disadvantages of poor power are increase in I2R losses in the system, reduction in the efficiency of the system.
What is the main disadvantage of synchronous motors?
Disadvantages or Demerits: Synchronous motors requires dc excitation which must be supplied from external sources. Synchronous motors are inherently not self starting motors and needs some arrangement for its starting and synchronizing. The cost per kW output is generally higher than that of induction motors.
What is the main disadvantage of 1ph induction motors?
1. The main disadvantage of an induction motor is, it draws a very high inrush current during its starting, for this reason, it makes a dip in voltage during starting which can affect other electrical loads connected to the same power source.
What is the basic principle of DC motor?
The basic working principle of the DC motor is that whenever a current carrying conductor places in the magnetic field, it experiences a mechanical force. Fleming’s left-hand rule and its magnitude decide the direction of this force.
What is the motor used for?
An electric motor is a device used to convert electrical energy into mechanical energy. Scientifically speaking, the electric motor is a unit used to convert electric power into motive energy or electrical energy into mechanical energy.
What is the principle and working of an electric motor?
An electric motor works on the principle that when a rectangular coil is placed in a magnetic field and a current is passed through it, a force acts on the coil which rotates it continuously. Hence, electrical energy is converted into mechanical energy.
What are the main parts of 3 phase induction motor?
The stator of the three-phase induction motor consists of three main parts : Stator frame, Stator core, Stator winding or field winding.
Why skewing is used in induction motor?
The rotor or stator slot of the induction motor skewed through some angle so that the bars lie under alternate harmonic poles of the same polarity or other words, bars must be skewed through two pitches. The main purpose of skewing is to reduce the magnetic logging between the starter and the rotor.
What is difference between induction motor and synchronous motor?
The power factor of a synchronous motor can be adjusted to lagging, unity or leading by varying the excitation, whereas, an induction motor always runs at lagging power factor. Synchronous motors are generally more efficient than induction motors. Synchronous motors are costlier.
Which motor is used in tramway?
Dc motor (Ma) and induction motor (Mc) are currently manufactured and used in 105 N tram drive, their parameters are available. Dc motor (Mb), brushless motor (Me) and slip-ring motor (Md) pa- rameters have been determined by analysis.
What are 3 types of motor controls?
There are mainly there are three types of motor control circuits: Direct On Line Starter (DOL starter) Star Delta Starter. Auto Transformer Starter.
Which motor is mostly used in industry?
3-phase AC induction motors are the most widely used motors in industrial and commercial applications.