Electrical Engineering: Power Electronics MCQ
11. Question
A three-phase voltage source inverter with ideal devices operating in 180º conduction mode is feeding a balanced star-connected resistive load. The DC voltage input is V dc . The peak of the fundamental component of the phase voltage is
Vdc/π
Answer
12. Question
A phase-controlled, single-phase, full-bridge converter is fed from a 230 V, 50 Hz AC source. The fundamental frequency in Hz of the voltage ripple on the DC side is
Answer
13. Question
The mean square value of the given periodic waveform f(t) is ___________
Answer
14. Question
Four power semiconductor devices are shown in the figure along with their relevant terminals. The device(s) that can carry dc current continuously in the direction shown when gated appropriately is (are)
Answer
15. Question
A single phase fully controlled rectifier is supplying a load with an anti-parallel diode as shown in the figure. All switches and diodes are ideal. Which one of the following is true for instantaneous load voltage and current?
vo ≥ 0 & io < 0
vo < 0 & io < 0
vo ≥ 0 & io ≥ 0
vo < 0 & io ≥ 0
Answer