The function of commutator ring in an electric motor is to reverse the direction of current flowing through the coil every time coil just passes the vertical position during a revolution. Hence as the direction of the current is reversed, the torque is changed in the direction.
What is the function of a commutator 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 is commutation in motor?
Commutation is the process of switching the field in the armature windings to produce constant torque in one direction, and the commutator is a device connected to the armature, which enables this switching of current. The lever arm for the torque produced on the armature varies with the angle of the coil (cos α).
Can commutator convert AC to DC?
The commutator and brushes convert the DC to AC to keep the armature turning. … It doesn’t convert to ac. The armature coils are first connected to dc from the brushes, and current flows in one direction through the armature coil. Then, the coil rotates to align the magnetic field.
What are the similarities and differences between electric motor and generator?
The Difference Between Electric Motor and Electric Generator in Tabular Form
| Electric Motor | Electric Generator |
|---|---|
| The shaft of the motor is driven by the magnetic force generated between the armature and the field. | In electric generators, the shaft is attached to the rotor and is driven by the mechanical force. |
What is the difference between armature and commutator?
An armature is a combination of the winding, commutator, brushes, and ball bearings.
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What is Commutator?
| Armature | Commutator |
|---|---|
| It gives current from the armature core to commutator | It converts the alternating power to direct power and vice-versa |
What are the types of commutation?
Three types of commutation are identified: i) Voltage commutation, ii) Current commutation and iii) Load commutation. In a voltage commutated thyristor circuit a voltage source is impressed across the SCR to be turned off, mostly by an auxiliary SCR.
What is commutator key?
The Plug Key Commutator is a key device used in physics and it has a brass block mounted on a thick plate of Bakelite. The plugs and lugs of the Plug Key Commutator are properly interloped and the locking is faultless.
Is commutator used in AC generator?
Commutators are used in direct current (DC) machines: dynamos (DC generators) and many DC motors as well as universal motors. … Therefore, commutated machines are declining in use, being replaced by alternating current (AC) machines, and in recent years by brushless DC motors which use semiconductor switches.
What is the difference between commutator and slip ring?
The main difference is that commutator is used for the conversion of AC to DC. … Slip rings are used in AC motors to provide a continuous transfer of power whereas the commutators are used in DC motors to reverse the polarity of the current in the armature windings.
What is difference between electric motor and generator?
Converting energy from one form to another is the key to understanding the differences between electric motors and generators. An electric motor converts electricity into mechanical energy, providing a power source for machinery. A generator does the opposite of this, converting mechanical energy into electricity.
How does electric motor in generator work?
When an electrical current is applied to the motor, the magnets or windings create a magnetic field that both attracts and repels the rotor, causing it to spin. … Rather than using electricity to create motion, electric generators in Lethbridge convert mechanical energy into electrical energy.
What is the difference between electric motor and AC generator?
The major difference between Motor and Generator is that a motor converts electrical energy into mechanical energy, whereas the generator does the exact opposite. The motor uses electricity whereas the generator produces electricity.