POWER ELECTRONICS AND INSTRUMENTATION(18EC36)

POWER ELECTRONICS AND 

INSTRUMENTATION

Course Code:18EC36 CIE Marks:40SEE Marks:60Number of Lecture Hours/Week:03 Total Number of Lecture Hours:40 (8 Hours/ Module)Exam Hours:03CREDITS – 03

Course Learning Objectives: This course will enable students to:

• Study and analysis of thyristor circuits with different triggering conditions.
• Learn the applications of power devices in controlled rectifiers, converters and inverters.
• Understand types of instrument errors.
• Develop circuits for multirange Ammeters and Voltmeters.
• Describe principle of operation of digital measuring instruments and Bridges.
• Understand the operation of Transducers, Instrumentation amplifiers and PLCs.

Module-1

Introduction: History, Power Electronic Systems, Power Electronic Converters and Applications.
Thyristors: Static Anode-Cathode characteristics and Gate characteristics of SCR, Turn-ON methods, Turn-OFF mechanisms, Turn-OFF Methods: Natural and Forced Commutation – Class A and Class B types, Gate Trigger Circuit: Resistance Firing Circuit, Resistance capacitance firing circuit, Unijunction Transistor: Basic operation and UJT Firing Circuit.
(Text 1)

Module-2

Phase Controlled Converter: Control techniques, Single phase half wave and full wave controlled rectifier with resistive and inductive loads, effect of freewheeling diode. Choppers: Chopper Classification, Basic Chopper operation: step-down, step-up and step-up/down choppers. (Text 1)

Module-3

Inverters: Classification, Single phase Half bridge and full bridge inverters with RL load.
Switched Mode Power Supplies: Isolated Flyback Converter, Isolated Forward Converter.(Text 1)
Principles of Measurement: Static Characteristics, Error in Measurement, Types of Static Error. (Text 2: 1.2-1.6)
Multirange Ammeters, Multirange voltmeter. (Text 2: 3.2, 4.4 )

Module-4

Digital Voltmeter: Ramp Technique, Dual slope integrating Type DVM, Direct Compensation type and Successive Approximations type DVM (Text 2: 5.1-5.3, 5.5, 5.6)
Digital Multimeter: Digital Frequency Meter and Digital Measurement of Time, Function Generator.
Bridges: Measurement of resistance: Wheatstone’s Bridge, AC Bridges-Capacitance and Inductance Comparison bridge, Wien’s bridge.
(Text 2: refer 6.2, 6.3 upto 6.3.2, 6.4 upto 6.4.2, 8.8, 11.2, 11.8-11.10, 11.14).

 

Module-5

Transducers: Introduction, Electrical Transducer, Resistive Transducer, Resistive position Transducer, Resistance Wire Strain Gauges, Resistance Thermometer, Thermistor, LVDT.
(Text 2: 13.1-13.3, 13.5, 13.6 upto 13.6.1, 13.7, 13.8, 13.11).
Instrumentation Amplifier using Transducer Bridge, Temperature indicators using Thermometer, Analog Weight Scale
(Text 2: 14.3.3, 14.4.1, 14.4.3).
Programmable Logic Controller: Structure, Operation, Relays and Registers (Text 2: 21.15, 21.15.2, 21.15.3, 21.15.5, 21.15.6).

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Course Outcomes: At the end of the course students should be able to:

 • Build and test circuits using power electronic devices.
• Analyze and design controlled rectifier, DC to DC converters, DC to AC inverters and SMPS.
• Define instrument errors.
• Develop circuits for multirange Ammeters, Voltmeters and Bridges to measure passive component values and frequency.
• Describe the principle of operation of Digital instruments and PLCs.
 • Use Instrumentation amplifier for measuring physical parameters.

Question paper pattern:

• Examination will be conducted for 100 marks with question paper containing 10 full questions, each of 20 marks.
• Each full question can have a maximum of 4 sub questions.
• There will be 2 full questions from each module covering all the topics of the module.
• Students will have to answer 5 full questions, selecting one full question from each module.
• The total marks will be proportionally reduced to 60 marks as SEE marks is 60.

Text Books:

1. M.D Singh and K B Khanchandani, Power Electronics, 2nd Edition, Tata Mc-Graw Hill, 2009, ISBN: 0070583897
2.H. S. Kalsi, “Electronic Instrumentation”, McGraw Hill, 3rd Edition, 2012, ISBN: 9780070702066.

Reference Books:

1. Mohammad H Rashid, Power Electronics, Circuits, Devices and Applications, 3rd/4th Edition, Pearson Education Inc, 2014, ISBN: 978-93-325-1844-5.
2. L. Umanand, Power Electronics, Essentials and Applications, John Wiley India Pvt. Ltd, 2009.
3. David A. Bell, “Electronic Instrumentation & Measurements”, Oxford University Press PHI 2nd Edition, 2006, ISBN 81-203-2360-2.
4. A. D. Helfrick and W.D. Cooper, “Modern Electronic Instrumentation and Measuring Techniques”, Pearson, 1st Edition, 2015, ISBN: 9789332556065.