21 - 30-Jun-11-9:13 AM Complex #s, Sines EEL 3111: Circuits...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
30-Jun-11---9:13 AM Complex #s, Sines 1 University of Florida, EEL 3111 – File # 21 © Dr. Eric M. Schwartz EEL 3111: Circuits 1 AC Circuit Analysis Today’s Menu > Complex Numbers > Sinusoidal Sources Today’s Class . .. University of Florida, EEL 3111 –File # 21 © Dr. Eric M. Schwartz 1 See examples on web-site: ac_L EEL 3111: Circuits 1 AC Circuit Analysis AC : Alternating Current (current that alternates between positive and negative). Why is it important? > Almost all power we use is AC. GRU generates AC power. Practical: We can generate it in a lab University of Florida, EEL 3111 –File # 21 © Dr. Eric M. Schwartz 2 Broader applications: Every practical signal is equal to a sum of sinusoids of various frequencies & amplitudes
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
30-Jun-11---9:13 AM Complex #s, Sines 2 University of Florida, EEL 3111 – File # 21 © Dr. Eric M. Schwartz EEL 3111: Circuits 1 AC Circuit Analysis History - 100 years ago this was not well understood AC Meter Use vector ac_L.sch well understood. AC Meter finds 10V AC Meter finds 8V finds ? arithmetic! University of Florida, EEL 3111 –File # 21 © Dr. Eric M. Schwartz 3 Charles Steimmetz solved the problem of calculating voltages in this type of circuit • You likely expect the AC meter to give 2V • It actually finds 6V across the resistor! • Why? • Because 10 2 -8 2 = 6 2 EEL 3111: Circuits 1 Complex Numbers and Electrical Engineering Calculators: The ones you have can likely use both rectangular and polar forms of complex mathematics Electrical engineers use j , not i to indicate the imaginary number component University of Florida, EEL 3111 –File # 21 © Dr. Eric M. Schwartz 4 > In EE, i indicates current In EE, we’ll start with physical reality, move into another domain (such as the complex number domain), and then go back to physical reality
Background image of page 2
30-Jun-11---9:13 AM Complex #s, Sines 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 07/11/2011.

Page1 / 7

21 - 30-Jun-11-9:13 AM Complex #s, Sines EEL 3111: Circuits...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online