Official Bihar Engineering University examination question papers, marks distribution, and questions transcript. Available exam sessions: 2020, 2019, 2018, 2016, 2015.
Open BEU Connect Android app to solve any numerical or derive formulas step by step.
No paper transcript available.
Official BEU curriculum units & topics for this examination subject.
Module 1: Power switching devices (8 Hours)
Diode, Thyristor, MOSFET, IGBT: I-V Characteristics • Firing circuit for thyristor • Voltage and current commutation of a thyristor • Gate drive circuits for MOSFET and IGBT
Module 2: Thyristor rectifiers (7 Hours)
Single-phase half-wave and full-wave rectifiers • Single-phase full-bridge thyristor rectifier with R-load and highly inductive load • Three-phase full-bridge thyristor rectifier with R-load and highly inductive load • Input current wave shape and power factor
Module 3: DC-DC converter (10 Hours)
Elementary chopper with an active switch and diode • Concepts of duty ratio and average voltage • Power circuit of a buck converter, analysis and waveforms at steady state • Duty ratio control of output voltage • Power circuit of a boost converter, analysis and waveforms at steady state • Relation between duty ratio and average output voltage
Module 4: Single-phase and 3-phase voltage source inverter (14 Hours)
Power circuit of single-phase voltage source inverter • Switch states and instantaneous output voltage • Square wave operation of the inverter • Concept of average voltage over a switching cycle • Bipolar sinusoidal modulation and unipolar sinusoidal modulation • Modulation index and output voltage • Power circuit of a three-phase voltage source inverter • Switch states, instantaneous output voltages • Average output voltages over a sub-cycle • Three-phase sinusoidal modulation • Current Source Inverter