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LECTURE NOTES

DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING COURSE: POWER ELECTRONICS BRANCH: EEE CLASS: III/I Sem. YEAR: 2013-14 LECTURE NOTES SHRI VISHNU ENGINEERING COLLEGE FOR WOMEN VISNUPUR, BHIMAVARAM - 534202 DEPARTMENT OF EEE SVECW Page 2 INDEX S. NO. CONTENT PAGE NO. 1 UNIT I: POWER SEMICONDUCTOR DEVICES 3 - 32 2 UNIT II: FIRING AND COMMUTATION CIRCUITS OF SCR 33 - 50 3 UNIT III: SINGLE PHASE HALF CONTROLLED CONVERTERS 51 - 60 4 UNIT IV: SINGLE PHASE FULLY CONTROLLED CONVERTERS 61 - 70 5 UNIT V: THREE PHASE LINE COMMUTATED CONVERTER 71 87 6 UNIT VI: AC voltage CONTROLLERS & CYCLO CONVERTERS 88 99 DEPARTMENT OF EEE SVECW Page 3 Unit-1 Power Semi Conductor Devices DEPARTMENT OF EEE SVECW Page 4 INTRODUCTION TO POWER ELECTRONICS: Power Electronics is a field which combines Power (electric power), Electronics and Control systems.

control - AC/DC motor drives used in industries, High voltage power supplies, Vehicle propulsion systems, High voltage direct current (HVDC) transmission. 1.2 BRIEF HISTORY OF POWER ELECTRONICS The first Power Electronic Device developed was the …

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SHRI VISHNU ENGINEERING COLLEGE FOR …

www.svecw.edu.in

UNIT -1 DEPARTMENT OF INFORMATION TECHNOLOGY::SVECW Page 1 UNIT-1 A BRIEF HISTORY OF COMPUERS: We begin our study of computers with a brief history. First Generation: Vacuum Tubes ENIAC The ENIAC (Electronic Numerical Integrator And Computer), designed and constructed at the University of Pennsylvania, was the world’s first general …

  Shri

SHRI VISHNU ENGINEERING COLLEGE FOR …

www.svecw.edu.in

SHRI VISHNU ENGINEERING COLLEGE FOR WOMEN::BHIMAVARAM DEPARTMENT OF INFORMATION TECHNOLOGY Computer Organization and Architecture …

  Architecture, Computer, Organization, Computer organization and architecture

LECTURE NOTES - svecw.edu.in

www.svecw.edu.in

Insulated Gate Bipolar Transistors (IGBT's). Static Induction Transistors (SIT's). The Thyristors can be subdivided into different types Forced-commutated Thyristors (Inverter grade Thyristors) Line-commutated Thyristors (converter-grade Thyristors) Gate-turn off Thyristors (GTO). Reverse conducting Thyristors (RCT's).

  Gate, Transistor, Insulated, Bipolar, Igbt, Insulated gate bipolar transistor, Big st

COMPUTER NETWORKS Lecture Notes

www.svecw.edu.in

The topology of a network is the geometric representation of the relationship of all the links and linking devices (usually called nodes) to one another. There are four basic topologies possible: mesh, star, bus, and ring Mesh: In a mesh topology, every device has a dedicated point-to-point link to every other device.

  Notes, Topology

Computer Graphics Lecture Notes

www.svecw.edu.in

Overview of Computer Graphics 1.1 Application of Computer Graphics Computer-Aided Design for engineering and architectural systems etc. Objects maybe displayed in a wireframe outline form. Multi-window environment is also favored for producing various zooming scales and views. Animations are useful for testing performance. Presentation Graphics

  Design, Engineering, Graphics

DataBase Management Systems Lecture Notes

www.svecw.edu.in

DataBase Management Systems Lecture Notes UNIT-1 Data: It is a collection of information. The facts that can be recorded and which have implicit meaning known as 'data'. Example: Customer ----- 1.cname. 2.cno. 3.ccity. Database: It is a collection of interrelated data. These can be stored in the form of tables.

  System, Management, Management system

OPERATING SYSTEMS Lecture Notes

www.svecw.edu.in

Interrupt transfers control to the interrupt service routine generally, through the interrupt vector, which contains the addresses of all the service routines Interrupt architecture must save the address of the interrupted instruction Incoming interrupts are disabled while another interrupt is being processed to prevent a lost interruptnA

  Services, Routines, Interrupts, The interrupt service, The interrupt, Service routines interrupt

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A good high vacuum pump should be connected to both the low and high side evacuation valves with copper tube or high vacuum hoses (¼” ID minimum). If the compressor has service valves, they should remain closed. A high vacuum gauge capable of registering pressure in microns should be attached to the system for pressure readings.

  High, Vacuum, High vacuum

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3RF34 3-Phase Solid-State Reversing Contactors 8/17 Class LE Open & Enclosed Lighting Contactors 9/79 to 9/84 Class LC Field Convertible Lighting Contactors 9/85 to 9/89 3SF2, 3SE3 Foot Switches 10/108 to 10/109 New layout for faster selection of 30mm Pilot Devices 10/143 to 10/162 7PV15 Solid-State Timers with Wide Voltage Range 11/27

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