Double edge modulation eliminates certain harmonics when the reference is a__________?

Related Mcqs:

1. A combination of synchronized leading edge and trailing edge modulation has also been used to control a____________?

   A. Boost single – phase power factor converter B. A buck dc – dc converter to reduce ripple in the intermediate dc bus capacitor C. Both A. and B. D. None f these...

2. In a 3 phase CSI, if the required line output voltages are balanced and 120 degree out of phase, then the chopping angles are used to eliminate only the harmonics at frequencies

   A. 5 B. 7 C. 11 D. All of these...

3. 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...

4. Harmonics in 3 phase inverters can be reduced by using___________?

   A. Passive filter B. Active filter C. Both passive and active filters D. None of these...

5. Unipolar modulation is generally used in____________?

   A. AC – AC converters B. AC – DC converters C. DC – AC converters D. DC – DC converters...

6. In bipolar modulation, the carrier is symmetric about zero with amplitude equal to Cm, the PWM output

   A. Zero B. Switches between – 1 / 2 and + 1 / 2 C. Switches between – 1 and + 1 D. Switches between 0 and + 1...

7. Very large values of modulation index (greater than 3.24) lead to___________?

   A. Square AC output voltage B. Sine AC output voltage C. Triangular AC output voltage D. Trapezoidal AC output voltage...

8. Double fourier series analysis of PWM is_____________?

   A. Two dimensional functions B. Three dimensional functions C. One dimensional functions D. All of these...

9. CB used for over current protection of thyristor operates when the fault current is__________?

   A. of long period B. of short duration C. both (A) and (B) D. neither (A) nor (B)...

10. A power MOSFET has three terminals called___________?

    A. Collector, emitter and gate B. Drain, source and gate C. Drain, source and base D. Collector, emitter and base...