Why is it necessary to control the speed of a DC motor?

DC motor speed control is one of the most useful features of the motor. By controlling the speed of the motor, you can vary the speed of the motor according to the requirements and can get the required operation.

Why do we need to control the speed of a DC motor?

DC Motors plays an important role in energy conversion process. It is a machine which converts electrical energy into mechanical energy. In mechanical system, speed varies with number of task so speed control is necessary to do mechanical work in a proper way. It makes motor to operate easily.

Why do you need to control the speed of motor?

This is very important when you start and break in large electric motors, because the greatest loads on the motor and the power supply occur in these cases. Furthermore, intelligent speed control reduces the maintenance and servicing costs of the plant many times over, thus saving considerable time and money.

Why is speed regulation important?

If the motor is running a load which remains constant at a given speed, the speed regulation is of little importance. … Speed regulation becomes of utmost importance on applications where a wide range of adjustable speed must be covered and where the load may change abruptly, particularly at lower speeds.

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What is speed control of DC motor?

Speed Control of DC Motor (Shunt, Series, and Compound) Often we want to control the speed of a DC motor on demand. This intentional change of drive speed is known as speed control of a DC motor. Speed control of a DC motor is either done manually by the operator or by means of an automatic control device.

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

In the shunt motor, speed can be controlled by connecting a variable resistor Rc in series with the shunt field winding. In the diagram below resistor, Rc is called the shunt field regulator. Figure: (a) Speed control of a D.C. shunt motor by variation of field flux.

What is the function of a speed controller?


The speed controller compares the speed reference value with the actual speed of the turbine and accordingly provides an output for the throttle valve lift. The reference speed signal ensures that the highest permissible rate of speed is consistent with the safe operation of the turbine.

How does a DC drive control speed?

DC drives are DC motor speed control systems. Since the speed of a DC motor is directly proportional to armature voltage and inversely proportional to motor flux (which is a function of field current), either armature voltage or field current can be used to control speed.

What is meant by speed control?

Definition of speed control

: equipment designed to operate automatically under certain conditions to keep the speed of a railroad train within a predetermined rate.

What does a DC motor controller do?

Simply put, a DC motor controller is any device that can manipulate the position, speed, or torque of a DC-powered motor.

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