AC Circuits 1

# AC Circuits 1 - METU AC Circuits Alternating Current(AC...

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EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 1 METU AC Circuits by Prof. Dr. Osman SEVA İ O Ğ LU Electrical and Electronics Engineering Department Alternating Current (AC) Circuits

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EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 2 METU AC Circuits What is Alternating Current (AC) ? Alternating Current (AC) is a current or voltage with a time varying characteristics Definition Sinusoidal AC Non-Sinusoidal AC 0,0 1,0 2,0 3,0 4,0 5,0 0,0 1,0 2,0 3,0 4,0 5,0 6,0 t (μsec) Voltag e (Volts) π 312 - 312 0 Angle (Radians) Voltage (Volt s) π /2 3 π /2 2 π
EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 3 METU AC Circuits What is Direct Current (DC) ? Direct Current (DC) is a current or voltage with an invariant characteristics in time Definition Current, I + R 1 = 5 Ohms V s =600 V Switch R 2 = 5 Ohms Switch is turned “on” at: t = 1 sec 123456 80 0 Cu rre nt (A mp ) 7 20 40 60 I = 60 A DC (Constant) Current Time (Sec)

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EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 4 METU AC Circuits Capacitor Capacitor is a device that can store electrical charge Definition The simplest configuration consists of two parallel conducting plates separated by an insulating layer Positive conductor Insulating Layer Negative conductor + _ Insulating Layer provides dielectricity (prevents current flow) between positive and negative conductors Symbolic representation _
EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 5 METU AC Circuits Capacitance Capacitors store electrical charge Definition Storage capacity of a capacitor is called “capacitance” + _ _ Small Capacitance Large Capacitance Water (hydroulic) example Capacitance = C 1 Capacitance = C 2 C 1 < C 2 _

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EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 6 METU AC Circuits Capacitor-Practical Configuration Capacitor plates are packaged in a roll form in order to have reduced size Practical Geometry + _ + _ Alüminum cover
EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 7 METU AC Circuits Practical Geometry Capacitor cylinders are then connected in parallel in bank form Capacitor-Practical Configuration

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EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 8 METU AC Circuits Practical Geometry Control relay Capacitor banks Capacitor-Practical Configuration
EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 9 METU AC Circuits Single and three-phase capacitor banks Practical Geometry Capacitor-Practical Configuration

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EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 10 METU AC Circuits MV Capacitor Banks
EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 11 METU AC Circuits MV Shunt Capacitor Banks

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EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 12 METU AC Circuits MV Shunt Capacitor Banks
EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA İ O Ğ LU, Page 13 METU AC Circuits Electronic Capacitors in a Motherboard

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EE 209 Fundamentals of Electrical and Electronics Engineering, Prof. Dr. O. SEVA
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## This note was uploaded on 04/25/2011 for the course EE 209 taught by Professor Alexander during the Spring '10 term at Middle East Technical University.

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AC Circuits 1 - METU AC Circuits Alternating Current(AC...

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