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16 a)
b)

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06000EE305 122002

phase bridge inverter. For both (a) 180° mode and (b) 120° mode, determine
rms value of load current, rms value of switch current and output power.
PART D
Answer any two full questions, each carries 10 marks.

With circuit diagram and waveforms, explain the single phase AC voltage
controller with RL load. Derive the rms value of output voltage. Assume
discontinuous conduction of load current.
Explain sinusoidal pulse width modulation for the output voltage control of
inverters with relevant waveforms. Mention its advantages.
Derive the expression for filter inductance and capacitance for Boost converter
In a buck converter, let the output voltage be held constant at 5 V by
controlling the switch duty ratio. Calculate minimum inductance required to
keep the converter operation in a continuous conduction mode under the
following condition:

(i) Input voltage is varied from 10 V to 40 V, and

(ii) Output power is kept at 5 W, and

(111) Switching frequency is selected as 50 kHz

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