What can be used for speed control of DC motor?
Thus, there are three general methods of speed control of D.C. Motors.
- Resistance variation in the armature circuit: This method is called armature resistance control or Rheostat control.
- Variation of field flux Ф This method is called field flux control.
- Variation of the applied voltage.
How can you control the speed of a separately excited DC motor?
The speed of separately excited dc motor can be control by changing the armature voltage and changing field flux. Due to this the speed can be controlled for below rated speed and speed above the rated speed, respectively.
Why do you need a fly back diode for a brushed DC motor?
For this, we only need a single transistor and a flyback diode, which provides a route to dissipate the back EMF that could otherwise cause damage (see Figure 2). To enable the speed to be varied, we need a transistor that can deliver the required power and can be switched on and off by a control signal.
Which is the best speed control method for DC motor?
Veermata Jijabai Technological Institute 1 f Speed control of DC motor by using PWM technique In order to have better open loop speed control as demand varies frequently like in traction system and many operations in industry must be control manually, PWM is most efficient and cheap speed control method for dc drives.
How to use PWM technique for DC motor?
DC MOTOR Veermata Jijabai Technological Institute 3 f Speed control of DC motor by using PWM technique 1. DC MOTOR 1.1 INTRODUCTION TO SPEED CONTROL: Speed control means intentional change of drive speed to a value required for performing the specific work process.
What are the applications for motor control diodes?
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