Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Switched-mode power supply wikipedia , lookup
Power MOSFET wikipedia , lookup
Electronic engineering wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Surge protector wikipedia , lookup
Rectiverter wikipedia , lookup
Opto-isolator wikipedia , lookup
Current mirror wikipedia , lookup
Node-Voltage Analysis and Mesh-Current Analysis ELEC 308 Elements of Electrical Engineering Dr. Ron Hayne Images Courtesy of Allan Hambley and Prentice-Hall Node-Voltage Analysis ELEC 308 2 Selecting the Reference Node Remember: A NODE is point at which two or more circuit elements are joined together Must FIRST select one of the nodes in the circuit to be a REFERENCE node Which one??? Theoretically, ANY will work Usually one end of a voltage source Mark reference node with GROUND SYMBOL ELEC 308 3 Finding Element Voltages ELEC 308 4 Exercise 2.5 Find expressions for vy, and vz, in term of the node voltages v1, v2, and v3. ELEC 308 5 Writing KCL Equations To find the current flowing out of node n through a resistance toward node k, subtract the voltage at node k from the voltage at node n and divide the difference by the resistance ELEC 308 6 Example 2.6 Write KCL equations ELEC 308 7 Standard Form Equations g11v1 g12v2 i1 g 21v1 g 22v2 i2 g11v1 g12v2 g13v3 i1 g 21v1 g 22v2 g 23v3 i2 g 31v1 g 32v2 g 33v3 i3 ELEC 308 8 Example 2.9 Write KCL equations Put equations in standard form Solve ELEC 308 9 Example 2.8 Find ix ELEC 308 10 Exercise 2.14 Find ia ELEC 308 11 Mesh-Current Analysis ELEC 308 12 Mesh Currents ELEC 308 13 Example Find the mesh currents i1 and i2 ELEC 308 14 Exercise Find the current through the 2Ω resistor ELEC 308 15 Circuits With Current Sources ELEC 308 16 Exercise 2.23 Find the mesh currents i1 and i2 ELEC 308 17 Summary Node-Voltage Analysis Mesh-Current Analysis ELEC 308 18