The rotor is a moving component of an electromagnetic system in the electric motor, electric generator, or alternator. Its rotation is due to the interaction between the windings and magnetic fields which produces a torque around the rotor’s axis.
What is the function of a rotor in a motor?
Rotors are the moving part in an Alternator that have permanent magnets that move around the Stator’s iron plates to generate an Alternating Current (AC). Rotors require existing motion to function, so only once the engine or turbine is already running will a Rotor work with a Stator to provide a charge.
What is the difference between rotor and motor?
is that rotor is a rotating part of a mechanical device, for example in an electric motor, generator, alternator or pump while motor is a machine or device that converts any form of energy into mechanical energy, or imparts motion.
What are the different types of rotor used in induction motor?
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.
How do you check engine rotors?
High current rotor test
By applying a high current through the shaft of the rotor when separated from the motor, thermal scans of the outer diameter can highlight shorted laminations.
What does a commutator do in an electric motor?
On DC and most AC motors the purpose of the commutator is to insure that the current flowing through the rotor windings is always in the same direction, and the proper coil on the rotor is energized in respect to the field coils.
What are the 6 parts of an electric motor?
These six components include:
- 1) The Rotor. The rotor is the moving part of your electric motor. …
- 3) The Bearings. The rotor in your electric motor is supported by bearings, which allow it to turn on its axis. …
- 4) The Windings. …
- 5) The Air Gap. …
- 6) The Commutator. …
- What Do All of These Components Have in Common?
What is the main disadvantage of synchronous motors?
The disadvantages of Synchronous motor includes: Synchronous motors require dc excitation which is supplied from external sources. These motors are not self-starting motors and need some external arrangement for its starting and synchronizing. The cost per kW output is commonly higher than that of induction motors.
Why do motors rotate?
Large AC motors (used in things like factory machines) work in a slightly different way: they pass alternating current through opposing pairs of magnets to create a rotating magnetic field, which “induces” (creates) a magnetic field in the motor’s rotor, causing it to spin around.
How do you test an induction motor rotor?
HIGH CURRENT ROTOR TEST – This test is performed by applying high current through the shaft of the rotor (rotor out of stator) and thermally scanning (infrared or thermoscan) the rotor O.D. searching for shorted laminations. These shorted laminations cause localized hot spots which cause uneven heating of the rotor.
What are the two types of rotor?
Induction motor rotor is of two types:
- Squirrel Cage Rotor.
- Wound Type Rotor or Slip Ring Type Rotor.
What type of rotor is most commonly used in an induction motor?
What is rotor frequency?
rotor frequency is the number of cycles per second of the rotor. usually, rotating speed is given in rotations per seconds (RPS) or rotations per minute (RPM).