Power Electronics (BEE603)
Assignment-2
1) Define a latching & holding currents in SCR.
2) Define Power Electronics with the help of a Block diagram.
3) Define firing angle of SCR.
4) Define freewheeling process.
5) Differentiate between freewheeling diode & feedback diode.
6) Draw the symbols & write the full forms for the following: i) GTO , ii) SCR , iii)
IGBT , iv) MOSFET
7) Explain V-I characteristics of SCR with neat & Clean diagram.
8) Compare a Power diode with a conventional signal diode.
9) Analyze the circuit of Single Phase half wave AC Controller with pure resistive
load & draw the Waveforms for input Voltage, output voltage & gate current.
10) Analyze the circuit of Single Phase half controlled bridge convertor (semi-
convertor) with pure resistive load & draw the Waveforms for input Voltage, output
voltage & gate current.
11) Analyze the circuit of Single Phase Fully controlled bridge convertor (Full-
convertor) with pure resistive load & draw the Waveforms for input Voltage, output
voltage & gate current.
12) Analyze the circuit of Single Phase half wave convertor at RL load with
freewheeling diode. & also draw the Waveforms for input Voltage, output voltage
& gate current.
13) Analyze the circuit of three Phase half wave convertor at pure resistive load and
also draw the Waveforms for input Voltage, output voltage & gate currents.
14) Analyze the circuit of three Phase full wave convertor at pure resistive load and
also draw the Waveforms for input Voltage, output voltage & gate currents.
15) Discuss the following methods of turning on a Thyristor:
a) Forward voltage triggering d) Temperature triggering
b) Gate triggering e) Light triggering
c) dv/dt triggering
16) Write short notes on following methods of thyristor protection:
a) dv/dt protection b) di/dt protection c) snubber circuit
17) Describe the following control strategies of DC-DC convertor:
a) Constant frequency Control b) Variable frequency Control.
18) Describe the basic working principle of DC-DC Converter with the help of neat and clean circuit
diagram along with the suitable input & output waveforms.
19) Describe the basic working principle of Cyclo-Converter with the help of neat and clean circuit
diagram along with the suitable input & output waveforms.
20) Differentiate between CSI and VSI.
Questions
Students
Assigned
2207350200001 to 1, 10, 15
2207350200004
2207350200005 to 2, 11, 16
2207350200011
2207350200012 to 3, 12, 17
2207350200016
2207350200017 to 4, 13, 18
2207350200024
2207350200025 to 5, 14, 19
2207350200032
2207350200033 to 6, 15, 20
2207350200038
2207350200039 to
2207350200044 7, 16, 3
2207350200045 to 8, 17, 4
2207350200052
2107350200001 9, 18, 5
2107350200045 9, 19, 6
2107350200051 10, 1, 7
2107350200054 11, 2, 8
2307350209001 12, 3, 9
2307350209002 13, 4, 10
2307350209003 14, 5, 11
2307350209004 15, 6, 19
2307350209005 16, 7, 20
2207350209003 17, 8, 12
Submission Deadline: 22-04-25
