Three phase IGBT inverter under sinusoidal PWM control

Answer the questions given below (refer Fig.1):


Fig. 1 Circuit diagram of three-phase bridge inverter


1. What are the full forms of CSI and VSI?
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2. How many switches in three phase inverter are in “ON” state simultaneously?

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3. Which of the carrier signal is more suitable for sinusoidal pulse width modulation:
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4. In sinusoidal pulse width modulation, the comparator output is high when the
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5. In three-phase inverter shown in Fig.1, which of the following switches should NOT be turned ON simultaneously?
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