* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Thevenin/Norton (Source transformation)
Electrical ballast wikipedia , lookup
Immunity-aware programming wikipedia , lookup
Electromagnetic compatibility wikipedia , lookup
Power engineering wikipedia , lookup
Pulse-width modulation wikipedia , lookup
History of electric power transmission wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Electrical substation wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Two-port network wikipedia , lookup
Variable-frequency drive wikipedia , lookup
Voltage regulator wikipedia , lookup
Life-cycle greenhouse-gas emissions of energy sources wikipedia , lookup
Power electronics wikipedia , lookup
Three-phase electric power wikipedia , lookup
Voltage optimisation wikipedia , lookup
Power MOSFET wikipedia , lookup
Stray voltage wikipedia , lookup
Buck converter wikipedia , lookup
Surge protector wikipedia , lookup
Opto-isolator wikipedia , lookup
Mains electricity wikipedia , lookup
Alternating current wikipedia , lookup
Thevenin and Norton Cookbook: Why? There are many kinds of complicated sources in electrical engineering, and we basically want to know how they ‘drive’ a load. We can either calculate or measure the voltages and currents at the nodes where the load will be connected, and we then know how the loaded circuit will behave. Isc Rth Norton Equivalent 1. Open Circuit Method to find Vth: (Ok for dependent and/or independent sources) a. Open (remove) the load. That means shorting out voltage sources and opening up current sources. Find VTH. If there are no independent sources, VTH=0. b. VTH = Voc 2. Short Circuit Method to find Isc: (Ok for dependent and/or independent sources) a. Short circuit the load. Find IL = Isc. b. If Rth is known. Then VTH = Isc RTH c. If Rth is not known. Rth = Vth/Isc 3. Equivalent Resistance Method to find Rth: (Ok for independent sources only) a. Open (remove the load). Find RTH 4. External Source Method: (Ok for dependent and/or independent sources) a. Open (remove) the load. Remove independent sources. ( Short out voltage sources and open up current sources.) Find VTH. If there are no independent sources, VTH=0. a. Remove independent sources. (That means shorting out voltage sources and opening up current sources.) Leave dependent sources in place. (‘Diamonds are forever.’) Apply external voltage Vex source to terminals. Know Vex. Find iex. RTH = Vex/Iex. ** Note: All of these methods can be used for calculation, simulation, or measurement. BUT be careful of shorting a real device (Method 2.), it may burn out your wire or the device.