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CIRCUIT VARIABLES

CIRCUIT VARIABLES. Prepared by: Ertuğrul Eriş Chapter1: Circuit Variables Reference textbook:Electric Circuits, Nielsson, Riedel Pearson, Prentence Hall,2010. OTHER RECOMMENDED TEXTBOOKS. Introduction to Electric Circuits R. C. Dorf, J.A; Svoboda John Wiley, 2004

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CIRCUIT VARIABLES

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  1. CIRCUIT VARIABLES Prepared by: Ertuğrul Eriş Chapter1: Circuit Variables Reference textbook:Electric Circuits, Nielsson, Riedel Pearson, Prentence Hall,2010 Ertuğrul Eriş

  2. OTHER RECOMMENDED TEXTBOOKS • Introduction to Electric Circuits • R. C. Dorf, J.A; Svoboda • John Wiley, 2004 • Fundamentals of Electric Circuits • C.K.Alexander; M.N.O. Sadiku • Mc Graw Hill Ertuğrul Eriş

  3. COURSE ASSESMENT MATRIX Ertuğrul Eriş

  4. CIRCUIT VARIABLES • CHAPTER 1 • Electrical Engineering • Electric Circuıts • Voltage and Current • The Ideal Basic Circuit Element • Power and Energy Ertuğrul Eriş

  5. ELECTRICAL ENGINEERING • What is it? • Electrical Engineering is the profession concerned with systems that produce, transmit, and measure electric signals. Systems could be • Power systems: production, transmission, measurement • Communication, control, signal processing • Multi disciplinary systems: Mechatronic, medical systems • How? • Natural (Physical)Phenomena»modeling»mathematical tools, • In order to • Meet practical needs of human being. Ertuğrul Eriş

  6. ELECTRONIC SYSTEMS • Communication Systems • Computer Systems • Control Systems • Power Systems • Medical Systems • Elelctronic systems are integration of various subsystems or components. Ertuğrul Eriş

  7. COMMUNICATION SYSTEMS • Subsystems • Switching, • Multiplexing • filtration • transmission • Technological Change • Analog • Digital • Relations • Technology, investment, • Economy, • Politics Ertuğrul Eriş

  8. COMMUNICATION SYSTEM Ertuğrul Eriş

  9. BIOMEDICAL SYSTEMS Ertuğrul Eriş

  10. CONTROL SYSTEMS Ertuğrul Eriş

  11. FIELD AND CIRCUIT THEORIES • Circuit theory is a special case of electromagnetic field theory : static and moving electrical charges. • Three conditions of special case are • Lumped(toplu uçlu elemanlar)components Physically small systems • Component net charge is zero. • No Magnetic coupling between components, but could be within the component. Ertuğrul Eriş

  12. ELEKTROMAGNETIC SPECTRUM Ertuğrul Eriş

  13. DESIGN STEPS IN ELECTRONIC ENGINEERING Ertuğrul Eriş

  14. VOLTAGE AND CURRENT (GERİLİM ve AKIM) • Charge separation (Elektrik Yük farkı ) V= dw/dq V = the voltage in volts(gerilim farkı volt), w= the energy in joules(Enerji jul), q = the charge in coulombs (Yük kolomb ). • Charge motion (Yük değişimi ) i=dq/dt İ = the current in amperes (akım amper ) q = the charge in coulombs (Yük kolomb ). T = the time in seconds (zaman saniye ). • Operational definitions: current is what the ammeter measures • Voltage is what the voltmeter measures. Ertuğrul Eriş

  15. THE IDEAL BASIC CIRCUIT ELEMENT-1 • Two terminals, • Voltage across the terminals of the box denoted by v and the polarity reference for the voltage is indicated by the (+) and (-) signs, • Voltage Polarity Reference determines voltmeter’s (device measures voltage) connection voltage drops/rise from(1)/to (2) [voltage rise from (2) to (1)]; Ertuğrul Eriş

  16. THE IDEAL BASIC CIRCUIT ELEMENT-2 • Two terminals, • Current in the basic element is denoted by i and the direction for the current is shown by the arrow placed in the box, • Current flow reference determines ammeter’s (device measures current) connection. • Mathematical description of an element (Tanım bağıntısı): v = f(i) current flows from(1) to (2) Ertuğrul Eriş

  17. PASSIVE SIGN CONVENTION • Reference direction for the current in an element is in the direction of the reference voltage drop across the element • IN other terms: Voltage reference (+) is at the back end of current reference arrow Ertuğrul Eriş

  18. POWER AND ENERGY -1 (GÜÇ VE ENERJİ) • P = dw/dt = (dw/dq)(dq/dt)= v.i • P = dw/dt • p: watts • w:joules • t:seconds • V:volts • i: amperes • P<0 • «Power is being extracted from the box» OR «Box is supplying power» • P>0 • «Power is being delivered to the box». OR «Box is absorbing power» Ertuğrul Eriş

  19. POWER AND ENERGY RANGES • Electronics • Miliwatts, Watts • Miliwatthours, Watthours • Electric circuits • Kwatts, Megawatts • Kwatthours, Megawatthours Ertuğrul Eriş

  20. POWER Ertuğrul Eriş

  21. POWER FLOW DIRECTION What is the direction of power flow? Ertuğrul Eriş

  22. POWER AND ENERGY -2 (burn, smoke) Ertuğrul Eriş

  23. POWER CALCULATION • The voltage and current at the terminals of a circuit element are • Find the maximum value of the power delivered too the circuit • Find the total energy delivered to the element Pmax = p(693μ) = 937,5mW, W=1,875 mJ Ertuğrul Eriş

  24. VOLTAGE AND CURRENT MEASUREMENTS • Most common Practical current and voltage value in electronics • Current: mili, micro amps. • Voltage: 0-100volts, mili, micro volts • Ammeter • Measures current, serial connection • Voltmeter • Measures voltage, paralel connection • Avometer • Meusures voltage, current, resistance, capacitance ... Ertuğrul Eriş

  25. CURRENT MEASUREMENT Measurement of the element (A) current Disconect one of the terminals wire of element (A) conect the ammeter in serial to the element (A). Ammeter polarity references should match with element (A) current flow reference as in passive sign convention. If the measured current sign negative then element (A) Current flows opposite direction of the reference. Ertuğrul Eriş

  26. VOLTAGE MEASUREMENT Measurement of the element (A) voltage conect the voltmeter in parallel to the element (A). Element (A) polarity references should match with Voltmeter polarity Reference. If the measured voltage sign is negative, then the element (A) Voltage polarity is opposite to the chosen one Ertuğrul Eriş

  27. RECHARGING CAR BATTERY Recharging process of a car battery: t=0 sn Flat(dead) battery, Voltage droped from 12 V to 9 V No power to run the car! Battery should be charced Recharging process; Beginnig t=0, V(t)=9V, End t=15000sn i(t)=0, v(t)=12V Recharging over Energy restored in the battery This battery could run the car! Q=123000 C; W=1247.2 KJ Ertuğrul Eriş

  28. PROGRAM DESIGN DEPT, PROGRAM G R A D U A T E S T U D E N T STUDENT P R OG R A M O U T C O M E S PROGRAM OUTCOMES P R OG R A M O U T C O M E S STATE, ENTREPRENEUR FIELD QALIFICATIONS EU/NATIONAL QUALIFICATIONS KNOWLEDGE SKILLS COMPETENCES NEWCOMERSTUDENT ORIENTIATION GOVERNANCE Std. questionnaire ALUMNI, PARENTS ORIENTIATION STUDENT PROFILE Std. questionnaire FACULTY NGO STUDENT, ??? CIRCICULUM ??? INTRERNAL CONSTITUENT Std. questionnaire EXTRERNAL CONSTITUENT EXTRERNAL CONSTITUENT REQUIREMENTS EU/NATIONAL FIELD QUALIFICATIONS PROGRAM OUTCOMES QUESTIONNAIRES QUALITY IMP. TOOLS GOAL: NATIONAL/INTERNATIONAL ACCREDITION

  29. BLOOM’S TAXONOMYANDERSON AND KRATHWOHL (2001) !!Listening !! Doesn’t exits in the original!!! http://www.learningandteaching.info/learning/bloomtax.htm Ertuğrul Eriş

  30. ULUSAL LİSANS YETERLİLİKLER ÇERÇEVESİ BLOOMS TAXONOMY Ertuğrul Eriş

  31. COURSE ASSESMENT MATRIX Ertuğrul Eriş

  32. ‘ABET’ ENGINEERING OUTCOMES Ertuğrul Eriş

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