What does VVVF stand for?

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What does VVVF stand for?
« on: May 08, 2015, 11:42:35 AM »
What does VVVF stand for?

Options are:


A.    Variant Voltage Vile Frequency
B.    Variable Velocity Variable Fun
C.    Very Very Vicious Frequency
D.    Variable Voltage Variable Frequency

Answer:

D.    Variable Voltage Variable Frequency

Information:

It is a method of controlling the speed of an AC induction motor, whereby speed, current and torque can all be accurately controlled.