What is the transfer function of field controlled and armature controlled DC motor?
The speed of a DC motor is directly proportional to armature voltage and inversely proportional to flux.In field controlled DC motor the armature voltage is kept constant and the speed is varied by varying the flux of the machine.
What is field controlled DC motor?
Field Controlled DC Motor. DC drives offer the ability to control the speed and torque of heavy-duty DC motors in various industrial and other similar applications. Speed control can be achieved using DC drives in a number of ways.
What is armature control method?
In the armature control method, the speed of the DC motor is directly proportional to the back emf (Eb) and Eb = V- IaRa. When supply voltage (V) and armature resistance Ra are kept constant, the Speed is directly proportional to armature current (Ia). The motor back EMF (Eb) and Speed of the motor can be changed.
What is the function of a DC motor?
A DC motor is any of a class of rotary electrical machines that converts direct current electrical energy into mechanical energy.
How do you control DC motor speed?
Speed of the DC motor is controlled by controlling the armature voltage. Armature voltage is controlled using different single phase AC/DC converter. Half converter, semi converter, full converter and dual converter are some of the thyristor based circuits which are used for speed control of DC motor.
Which is DC motor constant speed motor?
The motor M2 is a constant speed motor and supplied from the DC supply. The motor M1 starts rotating when the output voltage of generator G is fed to the motor. The speed of a motor can be controlled by controlling the output voltage of generator G.
What is a DC motor speed control?
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.