Electrical Engineering XYZ MCQs
Full form of VVVF control is:
- Variable VAr voltage frequency
- Variable voltage VAr frequency
- Variable voltage variable frequency
- VAr variable voltage frequency
Correct answer: 3. Variable voltage variable frequency
Explanation: VVVF stands for Variable Voltage Variable Frequency. This term is often used in the context of motor control or drive systems, particularly in applications like variable speed drives (VSDs) or variable frequency drives (VFDs).
In such systems, the speed of an AC motor is controlled by varying both the voltage and frequency of the electrical power supplied to it. By adjusting these parameters, the motor’s speed and torque can be precisely regulated to suit the requirements of the application.
So, “Variable voltage variable frequency” accurately describes the control mechanism employed in VVVF systems.