Very large values of modulation index (greater than 3.24) lead to___________?
Correct answer: A. Square AC output voltage
- A. Square AC output voltage
- B. Sine AC output voltage
- C. Triangular AC output voltage
- D. Trapezoidal AC output voltage
Explanation
A very high modulation index drives the inverter into overmodulation, where PWM pulses disappear over portions of the cycle and the waveform approaches a square-wave, or six-step, AC output. It does not produce a sinusoidal output.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Power Electronics
253 free Power Electronics MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Power Electronics questions
Single phase VSI are mainly used in___________?
Due to non sinusoidal waveform of the input current, the power factor of the rectifier is____________?
In rectifiers, load current flow is_________?
In single phase VSI, the harmonic which is not present is____________?
Double fourier series analysis of PWM is_____________?
In the operation and control of both naturally commutated and forced commutated SCR base converter, commutation plays an important role. The converters is / are ___________?