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.
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