COURSE TITLE : INDUSTRIAL ELECTRONICS & PLCCOURSE CODE : 4047COURSE CATEGORY : APERIODS/WEEK : 4PERIODS/SEMESTER : 72CREDITS : 4

TIME SCHEDULE

MODULE TOPICS PERIODS1 Thyristors, Triggering & Commutation

methods18

2 Converters 183 Industrial heating, AC and DC motor drives 184 Programmable Logic Controller 18

Total 72

OBJECTIVES

MODULE – I1.1.0 Understand the working and application of power devices1.1.1 Study the structure, characteristics & working principle of power MOSFETS withproper diagrams1.1.2 Study the structure, characteristics & working principle of power IGBTS with properdiagrams1.1.3 Study the working of SCR and analysis of V-I characteristics1.1.4 Transistor analogy of SCR1.1.5 Describe the structure and working principle of a Triac and the analysis of V-Icharacteristics1.1.6 Describe the structure and working principle of a Diac and analysis of V-Icharacteristics1.2.0 Triggering & Commutation methods1.2.1 Discuss the turn on/triggering methods of SCR – voltage triggering, gate triggering,radiation triggering, dv/dt triggering, thermal triggering.1.2.2 Discuss the gate triggering methods (using ‘R’ triggering and R-C & UJT triggering)1.2.3 Explain various commutation techniques of SCR – natural & forced commutationcircuits (Class A to Class F)

MODULE – II2.1.1 Study the operation of single-phase half wave converter, full wave midpoint and bridgeconverters (half and fully controlled) with R load & R-L load2.1.2 Study the operation of three phase converters - half wave, full wave midpoint andbridge converters (half and full controlled)2.1.3 Study the working of thyristor AC power control (SCR & Triac)2.1.4 Explain single phase & three-phase basic inverter circuits2.1.5 Explain series & parallel inverters with relevant waveforms2.2.0 Study single phase and three phase dual converters using waveforms2.2.1 Study the principles and applications of cyclo converters - midpoint and bridge (low –high frequency & high-low frequency)2.3.0 Discuss the Principle of choppers2.3.1 Describe step up and step down choppers

2.3.2 Study the working of Jone’s chopper with waveforms2.3.3 Explanation of AC choppers

MODULE-III3.1.0 Compare AC and DC drives3.1.1 Explanation of the speed control of DC drives (series & shunt)3.1.2 Understand the methods of speed control of induction motors3.1.3 Describe stator voltage control, rotor on-off control and variable voltage variablefrequency control3.2.0 Discuss Industrial Heating3.2.1 Principle and Theory of Induction Heating, applications3.2.2 Principle and Theory of Dielectric heating, applications3.2.3 Types of resistance welding systems3.2.4 Describe timers used in resistance welding system3.3.0 Study the different types of power supply systems3.3.1 Study the different types of UPS (on-line & off-line).3.3.2 Understand Servo controlled Voltage Stabilizers

MODULE – IV4.1.0 Study relay logic control, PLC based control, ladder diagram, facilities in PLC4.1.1 Basic principles and architecture of PLC4.1.2 Study of PLC hardware4.1.3 Write Ladder program using bit instructions, timer instructions and counter instructions4.1.4 Know about sensors and actuators, different switches, relays, proximity switches, halleffect sensor, fiber-optic sensor, and rotary encoder.4.2.1 Apply inputs to PLC through graphic symbols and know the output status of PLC in thegraphic symbols4.2.2 Understand Protocols of RS 485 and field bus.

CONTENT DETAILS

MODULE – IThyristors – Triggering & Commutation CircuitsPower MOSFETs – structure, characteristics.IGBTs – structure, principal of working, V-I characteristics, switching characteristicsThyristors – Principle of working, characteristics, specifications and ratingsTRIAC – structure, working, static characteristics and applicationsDIAC – structure, working, static characteristics and applicationTriggering of SCR - different methods of turn on – voltage triggering, gate triggering,radiation triggering, dv/dt triggering, thermal triggering.Gate triggering methods - R triggering - RC triggering – pulse triggering –triggering using UJT relaxation oscillatorCommutation of SCRs - Line commutation and forced commutation - different method offorced commutation schemes CLASS A, B, C, D, E & F

MODULE – IIThyristor ConvertersConverters- Operation of single-phase/ Three phase half wave, full wave midpoint and bridge

converters with resistive and inductive loads, wave formsAC Power Controllers- SCR as switch and TRIAC as switch- phase controlInverters – basic inverter circuits, series and parallel inverters.Dual converters -Single phase and three phase dual converters, principle and operation,waveforms,., Cyclo converter for single phase – mid point and bridge typeChoppers- simple chopper circuits, principle of step up and step down choppers, the Jone’schopper. Principle and working, waveforms AC chopper

MODULE – IIIIndustrial Heating and motor drivesDefinition of drives – comparison between AC and DC drive –Speed control of DC seriesand shunt motor drives.Methods of speed control of induction motors – stator voltage, rotor on/off , variable voltageand variable frequencyIndustrial heating- types – comparison-application, Electronic welding control – types-timersused in resistive weldingPower supplies – servo controlled voltage stabilizer –UPS

MODULE – IVProgrammable Logic ControllersRelay logic control panel – PLC based control panel - Architecture of PLCProgramming software – Bit instructions – Timer/Counter instructions – Compareinstructions – Move instructions – Math instructions – Program control instructions -Memory organization in PLC – analog inputs. Programming using ladder diagramSensors – Proximity switches – Reed Switches – Rotary encoders – Fibre optic sensors –Pneumatic switches and actuators.

TEXT BOOKS1. Industrial Electronics and Control - S.K.Bhattacharya, S.Chatterjee2. Programmable logic controllers – Frank D Petruzella3. Industrial Electronics and Control - Biswanath Paul (PHI)

REFERENCES1. Thyristors principles and applications - Ramamoorthy2. Power Electronic systems Theory and Design - Jai.P. Agrawal3. Modern Power Electronics and AC Drives - Bimal.K.Bose4. Power Electronics (Principles and Applications) – Joseph Vithayathil5. Introduction to Programmable Logic Controllers – Gary Dunning, 3rd Edition – Delmar