Transcript Document
1 Lab #7 – Thevenin/Norton • Activity #1 – finding the Thevenin/Norton Equivalent for the function generator – The function generator is a voltage source that produces an AC voltage, usually a sinusoidal voltage. – The waveform produced repeats itself over and over again, in this case 400 times per second 2 BK Function Generator Choose Sine Adjust the frequency knobs to the desired frequency. Turn on Adjust output Voltage Select the range Output terminal 3 Lab #7 – Thevenin/Norton • Activity #1 – finding the Thevenin/Norton Equivalent for the function generator – The multimeter is used to measure the RMS (root mean square) voltage (or effective DC voltage because it supplies as much power as a DC voltage source would.) – The DMM can also measure the frequency of the source. 4 Digital Multimeter (DMM) Range is set automatically Power switch AC voltage AC current Press the AC voltage button to get the RMS value of AC part of waveform. 5 Digital Multimeter (DMM) FREQ 2ND You can display the Frequency at the same time by pressing the 2ND button and then pressing the FREQ button. 6 Activity #2 – Max Power • Now that you have Rth = RN you can measure the output voltage for different loads and calculate the power delivered to each load. 7 Activities #3-5 – Simulations • Find Vth – Find open circuit voltage for • Circuit with only independent sources • Circuit with both independent and dependent sources – Vth=0 for circuits with only dependent sources 8 Activities #3-5 – Simulations • Find Rth – For circuits with only independent sources • By source removal, short circuit current or by applying a load – For circuits with only dependent sources • Connect a test source to the output – For circuits with both types of sources • By short circuit current, by applying a load or by connecting a test source to the output