Chapter 1, Problem 1SQ

To determine

Describe about the controller and its function.

Explanation of Solution

Discussion:

The controller is a device or group of devices which control the operation of an electric motor. The controller controls the delivery of a predetermined amount of electric power to apparatus connected to it. That is, the controller delivers the electric power to the apparatus based on the desired output.

The following are the functions of controller.

• The controller controls the starting action of the motor in a safe way.
• The controller controls the stopping action of the motor.
• The controller controls the reversing action of the motor.
• The controller controls the running action of the motor.
• The controller assists the motor to control its speed based on its requirement.
• The controller provides the safety for the operator.
• The controller protects the apparatus (the connected devices to the controller) from the damage or fault conditions.

Conclusion:

Thus, the controller is defined and its function is described.