Answer. Explanation: The split-ring commutator reverses the current in the coil as it rotates.
Which component of DC motor reverses the direction of current and how?
The armeture of the DC motor has 2 special components called brush and commutator. These components are responsible for reversing the direction of the current on armeture coil.
Which part of the DC motor is used to change the direction of current after a half cycle?
In a generator the commutator picks off the current generated in the windings, reversing the direction of the current with each half turn, serving as a mechanical rectifier to convert the alternating current from the windings to unidirectional direct current in the external load circuit.
Which part of electric motor is responsible for reversing the direction of current in an electric DC motor?
1 Answer. A commutator reverses the direction of current in the coil of a motor.
Which motor part is responsible for switching the direction of the current every time a DC motor turns through 180 degrees?
To provide continuous motion, the brushless motor’s controller reverses the direction, or phase, of the current each time the motor rotates 180 degrees, or another fixed amount such as 120 degrees for a 3-phase motor.
What happens if you wire a DC motor backwards?
Simply put, DC motors can turn in either direction (clockwise or counter-clockwise) and can be easily controlled by inverting the polarity of the applied voltage. … If a motor is already in motion, the applied voltage can be inverted and the motor will decelerate quickly, eventually stopping.
What are the parts of DC motor?
DC motors include two key components: a stator and an armature. The stator is the stationary part of a motor, while the armature rotates. In a DC motor, the stator provides a rotating magnetic field that drives the armature to rotate.
Which is not part of a DC motor?
The correct answer to the question will be compass i.e compass is not a part of a DC motor. Various parts of a DC motor are coil of wire, armature, field magnets, brushes and commutator.
What will happen if the direction of current is changed in the coil of motor?
When electric current is supplied to the coil of electric motor, it gets deflected because of magnetic field. … Reversal of direction of current reverses the direction of forces acting on the coil. The change in direction of force pushes the coil; and it moves another half turn.
What is the direction of current in motor?
Hint: For AC motors, the current flowing through the electromagnet and the current flowing through the coil both reverse, exactly in step, so the force on the coil is always in the same direction and the motor always spins either clockwise or counter-clockwise.
How do you change the speed of a DC motor?
Thus, the speed of a DC motor can be controlled in three ways:
- By varying the supply voltage.
- By varying the flux, and by varying the current through the field winding.
- By varying the armature voltage, and by varying the armature resistance.
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?
Does the motor rotate continuously when there is current?
Because the current flows in opposite directions in the wires, Fleming’s Left-Hand Rule tells us the two wires will move in opposite directions. … If the coil of wire could carry on moving like this, it would rotate continuously—and we’d be well on the way to making an electric motor.
How long can a DC motor run continuously?
You should anticipate, given proper attendance, that the motor can run continuously for the life of its brushes, which should be in the range of six months to a year. Presuming that the motor is too small to have its brushes changed by a trained electrician while running.
What is the resistance of a DC motor?
A DC electric motor spinning at 4500 RPM draws 3 amps of current with 110 volts measured at its terminals. The resistance of the armature windings, measured with an ohmmeter when the motor is at rest, unpowered, is 2.45 ohms.