What is the difference between VFD and a soft starter?
A. A VFD controls the speed of the motor by changing the voltage and frequency of the power supplied to the motor, while a soft starter controls the speed of the motor by adjusting the voltage of the power supplied to the motor
B. A VFD controls the speed of the motor by adjusting the mechanical load on the motor, while a soft starter controls the speed of the motor by adjusting the voltage of the power supplied to the motor
C. A VFD controls the speed of the motor by changing the size of the motor, while a soft starter controls the speed of the motor by adjusting the voltage of the power supplied to the motor
D. A VFD controls the speed of the motor by adjusting the resistance of the motor, while a soft starter controls the speed of the motor by adjusting the voltage of the power supplied to the motor
Answer:A
What is the difference between VFD and a soft starter?
A. A VFD controls the speed of the motor by changing the voltage and frequency of the power supplied to the motor, while a soft starter controls the speed of the motor by adjusting the voltage of the power supplied to the motor B. A VFD controls the speed of the motor by adjusting the mechanical load on the motor, while a soft starter controls the speed of the motor by adjusting the voltage of the power supplied to the motor C. A VFD controls the speed of the motor by changing the size of the motor, while a soft starter controls the speed of the motor by adjusting the voltage of the power supplied to the motor D. A VFD controls the speed of the motor by adjusting the resistance of the motor, while a soft starter controls the speed of the motor by adjusting the voltage of the power supplied to the motor
Explanation: A VFD and a soft starter are both devices used to control the speed of an AC motor, but they work in different ways. A VFD controls the speed of the motor by changing the voltage and frequency of the power supplied to the motor, while a soft starter controls the speed of the motor by adjusting the voltage of the power supplied to the motor. A soft starter is generally used to reduce the inrush current when the motor starts up, while a VFD is used to control the speed of the motor over a wide range of speeds.