A. Top switch of each leg is on at any instant
B. Bottom switch of each leg is on at any instant
C. Either A. or B.
D. None of these
Related Mcqs:
- The ac output voltage waveform of VSI and AC output current waveform of CSI respectively is composed of___________?
A. High dv / dt, low di / dt
B. Low dv / dt, low di / dt
C. Low dv / dt, high di / dt
D. High dv / dt, high di / dt - In square wave operation mode of 3 phase VSI, the VSI
A. Can control the load voltage
B. Cannot control the load voltage
C. Cannot control the load voltage except by means of dc link voltage
D. Cannot control the load voltage except by means of dc link current - In a 3 phase VSI SPWM to use a single carrier signal and preserve the features of PWM technique, the normalized carrier frequency should be____________?
A. Multiple of two
B. Odd multiple of three
C. Odd multiple of five
D. Odd multiple of seven - Under over voltage condition impedance offered by the voltage clamping device is__________?
A. low
B. High
C. moderate
D. infinity - A step up chopper has input voltage 110 V and output voltage 150 V. The value of duty cycle is_____?
A. 0.32
B. 0.67
C. 0.45
D. 0.27 - For similar carrier and modulating signals, the line current used in CSI is__________?
A. Identical to line voltage in a VSI
B. Identical to line current in VSI
C. Identical to phase voltage in VSI
D. Identical to phase voltage in CSI - In the SPWM, the modulating signal is___________?
A. Square
B. Sinusoidal
C. Triangular
D. Saw – tooth - For similar carrier and modulating signals, the line current used in CSI is_____________?
A. Identical to line voltage in a VSI
B. Identical to line current in VSI
C. Identical to phase voltage in VSI
D. Identical to phase voltage in CSI - The square wave operation of 3 phase VSI lines contains the harmonics. The amplitudes are____________?
A. Directly proportional to their harmonic order
B. Inversely proportional to their harmonic order
C. Not related to their harmonic order
D. None of these - In single phase VSI, the harmonic which is not present is____________?
A. 2nd
B. 3rd
C. 5th
D. 7th
