What Is Speed Control System?

Speed Control Systems allow you to easily set and adjust the speed of a motor. The control system consists of a speed feedback system, a motor, a driver (or a speed control pack) and a speed setting device. The motor for the speed control system is either a Brushless DC Motor or a standard AC Motor.



What is Ward Leonard method of speed control?

Ward Leonard method of speed control is used for controlling the speed of a DC motor. It is a basic armature control method. This control system is consisting of a DC motor M1 and powered by a DC generator G. In this method the speed of the DC motor (M1) is controlled by applying variable voltage across its armature.


Can we get speeds above rated speed by armature resistance control method?

Armature resistance control is restricted to keep the speed below the normal speed of the motor and increase in the speed above normal level is not possible by this method. For a given value of variable resistance, the speed reduction is not constant but varies with the motor load.


Which of the following speed control method is most suitable for controlling speed below base speed?

Detailed Solution. We can control the speed by increasing armature resistance. This method gives only below base speeds.


Which method of speed control is suitable for slip ring IM Mcq?

Answer: (b) rotor slip power control.


Which method of speed control in DC motor controls the speed above normal?

Armature Control Method

The controlling of armature resistance controls the voltage drop across the armature. With this method, the speed of the DC motor can control. This method also uses a variable resistor in series with the armature.


What are the methods of speed control of DC shunt motor?

Speed control of Shunt motor

  • Flux control method. It is already explained above that the speed of a dc motor is inversely proportional to the flux per pole.
  • Armature control method.
  • Voltage Control Method.
  • Flux control method.
  • Variable resistance in series with armature.
  • Series-parallel control.


Which method of speed control is suitable for slip ring IM?

Rotor Rheostat Control


Which speed control method is used for getting the speed below rated speed Mcq?

In armature circuit resistance method armature resistance is increased. As a result the back emf decreases. As the speed is directly proportional to back emf speed will also decrease. Therefore this method is only used for below rated speed.


Which method can be used to obtain speed greater than the rated speed of the motor?

Increasing the speed can be achieved by increasing the supply frequency as the speed and frequency are directly proportional; however, there are two constraints. The first is the saturation of the magnetic circuit, but this issue can be significantly avoided by keeping the V/f ratio constant.


Which method is not used for speed control of slip ring induction motor?

Hence, Changing the pole method is not used for controlling the speed of the slip ring induction motor.


Which speed control method is applied to obtain both below normal and above normal speed in DC motor?

Armature resistance control method

Armature resistance control is restricted to keep the speed below the normal speed of the motor and increase in the speed above the normal level is not possible by this method.


Why are speeds above rated speed obtained in field control method?

Field diverter method: With this approach, you reduce the field flux through shunting around the series to lower resistance and increase speed. As a result, you get a higher than normal speed that increases as the load lessens.


What are the speed control methods of DC motor?

There are three main ways to achieve speed regulation in series DC motors–flux control, voltage control, and armature resistance control.

  • Flux Control Method.
  • Voltage Regulation Method.
  • Armature Resistance Control Method.


Which method used to control the speed above the rated speed?

We can control the speed by increasing armature resistance.


What is speed control system?

Speed Control Systems allow you to easily set and adjust the speed of a motor. The control system consists of a speed feedback system, a motor, a driver (or a speed control pack) and a speed setting device. The motor for the speed control system is either a Brushless DC Motor or a standard AC Motor.


Which speed control method offers below normal speed in DC shunt motor?

Shunt motor is a special type of DC motor which runs at a constant speed. But using field and armature rheostat control method we can make it more versatile. Field rheostat provides above normal speed and armature rheostat provides wide range of below normal speed.


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21-Jul-2022

Education

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