As you are asking for WB Polytechnic Diploma in EE 5th Semester Syllabus so on your demand I am providing same :
Name of the Subject : Power Electronics & Drives
Subject Code: EE/S5/PED Semester : Fifth
Duration : One Semester Maximum Marks : 150
Teaching scheme : Examination scheme :
Theory: 3 Hrs./ Week Mid Semester Exam: 20 Marks
Practical: 2 Hrs./ Week Assignment & Quiz: 10 Marks
End Semester Exam: 70 Marks
Practical: 50 Marks
Credit: 04
Aim:
Sl. No.
1. The field of Electrical Engineering is generally segmented into three major areas
Electronics, Power & Control.
2. This subject is the combination of these three areas. Nowadays all the industrial drives to
run a machine and to control it as per requirement are based on Power Electronics.
2. Understanding of the subject will provide skill to the students for trouble shooting & testing of
Power semiconductor devices, Solid state DC & AC motor drives.
Objective:
Sl. No. Student will be able to:
1. Describe the Power semiconductor devices & draw their characteristics.
2. Describe the Inverter, Converter & Chopper circuits.
3. Explain the operation of the DC motor & AC motor drives
Pre-Requisite:
1. Knowledge of Applied Electronics.
2. Knowledge of DC & AC Motor operation to run their drives.
Contents (Theory): Hrs./Unit Marks
Unit : 1 1. POWER SEMICONDUCTOR DEVICES:
1.1 THYRISTOR (SCR)
1.1.1 Construction, operation & symbol.
1.1.2 V-I characteristics of SCR (Holding current, Latching
current, Breakover voltage).
1.1.3 Turn on methods - Voltage triggering, Gate triggering,
dv/dt triggering.
1.1.4 Turn off methods Current reduction, AC line
commutation, Forced commutation.
1.1.5 Thyristor specifications voltage rating, current rating,
power rating, dv/dt, di/dt, Gate current, temperature.
1.1.6 Utility of Snubber circuit , Freewheeling diode.
1.1.7 DIAC, TRIAC, SCS Principle of operation, characteristics
& application.
1.1.8 IGBT - Principle of operation, characteristics & application.
10 14
Unit : 2 2. Switching & Timer Circuits :
2.1 Simple transistor timer using R-C as timing element.
2.2 Classification of multi-vibrators.
2.3 Study of Astable, Monostable & Bistable multivibrator
10 14
circuits using OPAMP.
2.4 Internal block diagram, Pin diagram and operating of IC 555.
2.5 Study of Astable, Monostable & Bistable multivibrator
circuits using IC 555 timer.
Unit : 3 3. Converter and Inverter:
3.1 AC to DC Converter :
3.1.1 Single phase fully controlled Half Wave Converter
- with resistive load,
- with R-L load
3.1.2 Single phase fully controlled Full Wave Converter
- with resistive load,
- with R-L load
3.1.3 Three phase fully controlled Bridge Converter
- with RL load
3.1.4 Cycloconverter Principle of operation of Single phase &
Three phase cycloconverter, Basic circuit diagram, Input &
Output waveforms.
3.2 Inverter :
3.2.1 Classification of Single phase & Three phase Inverter
Line commutated & Forced commutated Inverters, Series,
Parallel, Bridge Inverter
3.2.2 Operation of basic Series Inverter.
3.2.3 Operation of basic Parallel Inverter.
3.2.4 Operation of Single phase Bridge Inverter -
a) Half Bridge Inverter
b) Full Bridge Inverter
3.2.5 Pulse Width Modulated Inverter
a) Single pulse width Modulated Inverter.
b) Multiple pulse width Modulated Inverter.
c) Sinusoidal pulse width Modulated Inverter.
10
1
6
Unit : 4 4. DC Chopper:
4.1 Principles of chopper.
4.2 Classification
a) Step-up & Step-down chopper
b) Second quadrant, Two quadrant & Four quadrant
operation.
4.3 Type-A, B, C, D chopper Operating Principle.
4.4 Commutations methods for choppers
Auxiliary commutation, Load commutation.
4.5 Jones chopper.
08
1
2
Unit : 5 5. DC & AC Drives :
5.1 Speed control of separately excited DC motor by single
phase fully controlled converter.
5.2 Speed control of separately excited DC motor with three
phase fully controlled converter.
5.3 Speed control of DC series motor with chopper control.
5.4 Speed control of DC servomotor.
5.5 Speed control of Three phase Induction motor with variable
frequency PWM VSI.
5.6 Speed control of Three phase Induction motor with variable
voltage variable frequency control.
5.7 Speed control of AC servomotor.
5.8 Static VAR compensation system - Principle of operation &
10
1
4
Block diagram.
5.9 Uninterrupted power supply Principle of operation & Block
diagram of On load & Off load type UPS.
WB Polytechnic Diploma in EE 5th Semester Syllabus 
