Difference between revisions of "ECE 110/Concept List/S24"

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* Current Division and Re-Division
 
* Current Division and Re-Division
 
* Basics of NVM
 
* Basics of NVM
 +
 +
== Lecture 6 - 1/29 - Node Voltage Method ==
 +
* NVM
 +
** Examples on Canvas
 +
** Labels:
 +
*** Very Lazy: label ground, then make every other node a new unknown.  Voltage sources, voltage measurements, and current measurements will provide additional equations.
 +
*** Lazy: label ground, then label any node connected to ground if it has a voltage source or voltage measurement.  Make every other node a new unknown.  Voltage sources not connected to ground, voltage measurements not connected to ground, and current measurements will provide additional equations.
 +
*** Smart: label ground; once a node gets labeled, if there is a voltage source or a voltage measurement anchored at that node, use the source or measurement to label the other node it is attached to.  Current measurements will provide additional equations.
 +
*** Really Smart: same as smart, only also use voltage drops across resistors with current measurements to relate node voltages.

Revision as of 01:49, 31 January 2024

Lecture 1 - 1/11 - Course Introduction, Nomenclature

  • Circuit terms (Element, Circuit, Path, Branch and Essential Branch, Node and Essential Node, Loop and Mesh).
  • Accounting:
    • # of Elements * 2 = total number of voltages and currents that need to be found using brute force method
    • # of Essential Branches = number of possibly-different currents that can be measured
    • # of Meshes = number of independent currents in the circuit (or generally Elements - Nodes + 1 for planar and non-planar circuits)
    • # of Nodes - 1 = number of independent voltage drops in the circuit
  • Electrical quantities (charge, current, voltage, power)

Lecture 2 - 1/16 - Electrical Quantities

  • Passive Sign Convention and Active Sign Convention and relation to calculating power absorbed and/or power delivered.
  • Power conservation
  • Kirchhoff's Laws
    • Number of independent KCL equations = nodes-1
    • Number of independent KVL equations = meshes
  • Example of how to find $$i$$, $$v$$, and $$p_{\mathrm{abs}}$$ using conservation equations and how to check using extra conservation equations
  • $$i$$-$$v$$ relationships of various elements (ideal independent voltage source, ideal independent current source, short circuit, open circuit, switch)
  • Resistor symbol (and spring symbol)

Lecture 3 - 1/18 - Equivalents

  • Resistance as $$R=\frac{\rho L}{A}$$
  • $$i$$-$$v$$ relationship for resistors; resistance [$$\Omega$$] and conductance $$G=1/R$$ $$[S]$$
  • $$i$$-$$v$$ for dependent (controlled) sources (VCVS, VCCS, CCVS, CCCS)
  • Combining voltage sources in series; ability to move series items and put together
  • Combining current sources in parallel; ability to move parallel items and put together
  • Equivalent resistances

Lecture 4 - 1/23 - Brute Force Method; Delta-Wye; Voltage Division Part 1

  • Brute Force method
  • Delta-Wye equivalencies (mainly refer to book)
  • Voltage Division

Lecture 5 - 1/25 - Voltage Division Part 2, Current Division, and Node Voltage Division Part 1

  • Voltage Re-Division
  • Current Division and Re-Division
  • Basics of NVM

Lecture 6 - 1/29 - Node Voltage Method

  • NVM
    • Examples on Canvas
    • Labels:
      • Very Lazy: label ground, then make every other node a new unknown. Voltage sources, voltage measurements, and current measurements will provide additional equations.
      • Lazy: label ground, then label any node connected to ground if it has a voltage source or voltage measurement. Make every other node a new unknown. Voltage sources not connected to ground, voltage measurements not connected to ground, and current measurements will provide additional equations.
      • Smart: label ground; once a node gets labeled, if there is a voltage source or a voltage measurement anchored at that node, use the source or measurement to label the other node it is attached to. Current measurements will provide additional equations.
      • Really Smart: same as smart, only also use voltage drops across resistors with current measurements to relate node voltages.