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How do you control the direction and speed of a DC motor?
DC motors feature a speed, which can be controlled smoothly down to zero, immediately followed by acceleration in the opposite direction without power circuit switching. Among the different control methods for DC motor armature voltage control method using pulse width modulation (PWM) is best one.
How can we change the speed direction of a DC motor?
Thus, the speed of a DC motor can be controlled in three ways:
- By varying the supply voltage.
- By varying the flux, and by varying the current through the field winding.
- By varying the armature voltage, and by varying the armature resistance.
How will the motor be controlled to rotate in both directions?
Simply put, DC motors can turn in either direction (clockwise or counter-clockwise) and can be easily controlled by inverting the polarity of the applied voltage. Strictly speaking, the motors can actually create a force in either direction.
What happens if generator rotates in reverse direction?
Reverse rotation doesn’t make sense. A generator doesn’t spin backwards due to it being loaded. However, there is reverse torque due to current. The generator makes a voltage proportional to its rotation speed.
What are the speed control methods of a DC motor?
Speed Control Methods of a DC Motor Speed Control of Shunt Motors Speed Control of Series Motors Flux Control Method. In this flux control method, speed of the motor is inversely proportional to the flux. Armature Control Method. Voltage Control Method of DC Motor. Speed Control Of Series Motor.
Why can we control the speed of a DC 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 . The speed control mechanism is applicable in many cases like controlling the movement of robotic vehicles, movement of motors in paper mills, and the movement of motors in elevators where different types of DC motors are used.
How can the speed of a DC motor be controlled?
The speed of DC motor can be controlled by this method by any one of the following ways – Field Diverter Method This method uses a diverter. Tapped Field Control This is another method of increasing the speed by reducing the flux and it is done by lowering number of turns of field winding through which current flows.
How can we change the direction of a DC motor?
Yes, you can change the direction of a DC – motor by changing the field wires or by changing the armature wires. Only take care, that you change only the field or the rotary field. If you change both at the same time, you don’t change the direction.