How can you reverse the direction of rotation of a shunt wound DC motor?

The direction of rotation of a DC shunt motor can be reversed by changing the polarity of either the armature coil or the field coil. You can reverse the direction by simply reversing the armature leads. The same can be done with a shunt motor and a compound motor.

How can the direction of rotation of a shunt DC motor be reversed?

Hence the direction rotation of the motor can be reversed by reversing the current through either the armature winding or the field coils. … Now in the case of a DC shunt motor, the direction of the motor can be reversed by changing the direction of current in the armature or field winding but not both at the same time.

Why and how does the DC shunt motor reversed its direction?

The commutator changes the direction of the current in the armature conductors as they pass across poles of opposite magnetic polarity. Continuous rotation in one direction results from these reversals in the armature current.

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How do you change the direction of a DC motor?

We can change the direction of DC motor 1) by changing the polarity of applied field voltage. 2) by changing the polarity of the applied voltage to the armature winding. 3) if we change both of the polarity of field and armature then the motor will rotate with previous direction…

Which of the following rule is used to determine the direction of rotation of DC motor?

Which of the following rule is used to determine the direction of rotation of D.C motor? Answer 4. Fleming’s left-hand rule.

Where is DC shunt motor used?

The applications of shunt DC motor include the following. These motors are used wherever stable speed is required. This kind of DC motor can be used in Centrifugal Pumps, Lifts, Weaving Machine, Lathe Machines, Blowers, Fans, Conveyors, Spinning machines, etc.

How do you control the speed of a DC shunt motor?

Thus, there are three general methods of speed control of D.C. Motors.

  1. Resistance variation in the armature circuit: This method is called armature resistance control or Rheostat control.
  2. Variation of field flux Ф This method is called field flux control.
  3. Variation of the applied voltage.

What happens if the direction of current at the terminals of a series motor is reversed?

Though the direction of current at the terminals of series motor is reversed the direction of rotation of motor will be same as previous. … The motor would continue to run in the same direction since the direction of the current would be reversed in both the armature and the field windings.

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How do you change the direction of a motor?

To change or reverse the direction of rotation of a single phase motor is by changing the position of the phase and neutral cables only on one coils, either the main coils or on the auxiliary coils.

Which of the following rule is used to determine the direction of rotation of coil?

Answer. Explanation: The direction of the force on the wire is determined by Fleming’s left-hand rule. The motor effect is when a coil of current-carrying wire rotates due to its presence in a magnetic field.

What is the need of 3 point starter?

A three-point starter is an electrical device, used for starting as well as maintaining the DC shunt motor speed. The connection of resistance in this circuit is in series which decreases the initial high current and guards the equipment against any electrical failures.

What will happen when the DC motor is connected to AC supply then?

1. What will happen if DC shunt motor is connected across AC supply? Explanation: In case of parallel field connection, it won’t rotate at all and will start humming and will create vibrations, as a torque produced by positive and negative cycle will cancel out each other. DC motor will be heated up and it may burn.

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