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GATE EE 2021 Set 1 — Question 65

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NAT+2 / -0MediumVSI (1φ, 3φ)InvertersPower ElectronicsVoltage Control Methods

Power Electronics → Inverters → Voltage Control Methods

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Question

A single-phase full-bridge inverter fed by a 325 V DC325\text{ V DC} produces a symmetric quasi-square waveform across 'ab' as shown. To achieve a modulation index of 0.80.8, the angle θ\theta expressed in degrees should be __________.
(Round off to 2 decimal places.)
(Modulation index is defined as the ratio of the peak of the fundamental component of VabV_{ab} to the applied DC value.)
Circuit diagram of a single-phase full-bridge inverter and its output voltage waveform $V_{ab}$ showing a quasi-square wave with pulse width from $\theta$ to $\pi - \theta$
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