The carrier which are commonly used in constant – frequency PWM is:
A. Sawtooth carrier
B. Inverted sawtooth carrier
C. Triangle carrier
D. All of these
In a three phase converter, the number of notches per cycle is:
A. One
B. Three
C. Six
D. Nine
The control method used for PWM dc – dc converter is:
A. Voltage mode control
B. Current mode control
C. Hysteric control
D. All of these
Between the incoming and outgoing devices in voltage commutation:
A. Large overlapping takes place
B. Small overlapping operation
C. No overlapping operation
D. None of these
The average value of the output voltage in a step – down dc chopper is given by:
A. V 0 = V s
B. V 0 = D V s
C. V 0 = V s / D
D. V 0 = V s / ( 1 – D )
