What are the types of rotors in induction motors?
Induction motor rotors may be of two types, wound rotor or squirrel-cage rotor. A wound rotor has windings similar to and wound for the same number of poles as the stator. The rotor windings are connected to insulated slip rings mounted on the rotor shaft.
What is the rotor of an induction motor?
Rotor as the name suggests it is a rotating part of an electrical machine, in which current is induced by transformer action from rotating magnetic field. Induction motor rotor is of two types: Squirrel Cage Rotor.
What are the different 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.
Why rotor is used in induction motor?
A wound rotor motor is a variation of the three-phase induction motor, designed to provide high starting torque for loads with high inertia, while requiring very low current. Wound rotor motors are also referred to as “slip ring motors.” During starting, this resistance is placed in series with the rotor windings.
What are types of rotors?
There are two types of induction motor rotors: Squirrel-cage rotor or simply cage rotor. Phase wound or wound rotors. The motors that use this type of rotor are known as Slip-ring rotors.
What are the two types of rotors?
The four different rotor types are:
- Blank & Smooth – Blank and smooth rotors are what you’ll find on most passenger vehicles and feature a smooth, blank metal surface all the way around the rotor.
- Drilled – Drilled rotors feature drilled holes around the metal surface.
How many types of rotors are there?
The four different rotor types are: Blank & Smooth – Blank and smooth rotors are what you’ll find on most passenger vehicles and feature a smooth, blank metal surface all the way around the rotor. Drilled – Drilled rotors feature drilled holes around the metal surface.
What are the types of rotor?
Type and construction of rotors
- Squirrel-cage rotor.
- Wound rotor.
- Salient pole rotor.
- Non-salient rotor.
- Rotor bar voltage.
- Torque in rotor.
- Induction motor slip.
- Frequency of induced voltages and currents.
What is wound type rotor?
A wound-rotor motor, also known as slip ring-rotor motor, is a type of induction motor where the rotor windings are connected through slip rings to external resistance. Adjusting the resistance allows control of the speed/torque characteristic of the motor.
How do rotor motors work?
In a three-phase induction machine, alternating current supplied to the stator windings energizes it to create a rotating magnetic flux. The rotor circuit is shorted and current flows in the rotor conductors. The action of the rotating flux and the current produces a force that generates a torque to start the motor.
What is rotor and types of rotor?
Type and construction of rotors. There are two designs for the rotor in an induction motor: squirrel cage and wound. In generators and alternators, the rotor designs are salient pole or cylindrical.
What are the different types of induction rotors?
Types of three phase induction motor rotor. There are two types of induction motor rotors: Squirrel-cage rotor or simply cage rotor. Phase wound or wound rotors. The motors that use this type of rotor are known as Slip-ring rotors.
What makes an induction motor an asynchronous motor?
The rotor of an induction motor can be a squirrel cage rotor or wound type rotor. Induction motors are referred to as ‘asynchronous motors’ because they operate at a speed less than their synchronous speed. So the first thing to understand is – what is synchronous speed?
How does the magnetic field of an induction motor work?
The rotating magnetic field produced in the stator will create flux in the rotor, hence causing the rotor to rotate. Due to the lag between the flux current in the rotor and the flux current in the stator, the rotor will never reach its rotating magnetic field speed (i.e. the synchronous speed). There are basically two types of induction motor.
How does a three phase induction motor work?
During locking, the rotor and stator teeth attract each other due to the magnetic field and this locking tendency is reduced in cage motor. The wound rotor consists of a slotted armature. Insulated conductors are put in the slots and connected to form a three-phase double layer distributed winding similar to the stator winding.