Lecture (L7-4) Phasor Domain Analysis & Impedance Transformations

1. What is impedance?
2. What are the impedances of R,L,C elements?
3. How can you analyze the voltage and/or current in RLC circuits using impedance?
4. How can you combine impedances in series and parallel?

Textbook Section 7-4

Kirchoff's Law with phasors

L7 3 1 Kirchhoffs Laws With Phasors Links to an external site.

(CC Links to an external site.)

Chapter 7-4 Impedance Transformations

Complex Impedance

L7 4 0 Complex Impedance Links to an external site.

(CC Links to an external site.)

Series & Parallel Impedance

L7 4 1 Series and Parallel Impedance Links to an external site.

(CC Links to an external site.)

Voltage Division

http://www.youtube.com/watch?v=H5KTWugv_gY

(CC Links to an external site.)

(optional before class) Current Division

L7 4 3 Current Division Links to an external site.

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Self-Assessment: ECE1250_Assess7_4.pdf Download ECE1250_Assess7_4.pdf

• Examples of Kirchhoff's Laws with phasors:

  (Example with no numbers)

  L7 3 2 Example 1 No numbers Links to an external site.

  (CC Links to an external site.)

  (Example with numbers)

  L7 3 3 Example 1 with numbers Links to an external site.

  (CC Links to an external site.)

• Examples of Impedance Transformations:

 Delta and Wye

L7 4 4 Delta Wye Connections Links to an external site.

(CC Links to an external site.)

• Examples:  Conversion from Time to Frequency Domain

Worksheet:in class 7-4.docx Download in class 7-4.docx

Slides: L 7-4 in class.ppt Download L 7-4 in class.ppt

HW 7-4

L7-4 Phasor Analysis