Introduction 12 VDC to 120 VAC Inverter Juan Tello This presentation will probably involve audience discussion, which will create action items. Use PowerPoint to keep track of these action items during your presentation In Slide Show, click on the right mouse button Select “Meeting Minder” Select the “Action Items” tab Type in action items as they come up Click OK to dismiss this box This will automatically create an Action Item slide at the end of your presentation with your points entered.

Summary Background How the circuit works? Simulation Testing Applications Conclusion

The Circuit

Schematic using Simplorer

Simulation Output

Half Circuit R4 & C2

Just One Cycle

Half Circuit D1 & R1

One Cycle

Half Circuit VCE2 & TV1

One Cycle

Half Circuit One Cycle

Half Circuit Analysis During Positive Cycle D1 is closed Q2 is open C1 is discharging T2-V1 is negative voltage

The Other Half Circuit

Simulation Summary During Positive Cycle Bottom Top D1 is closed D2 is open Q2 is open Q1 is closed C1 is neg. C2 is zero T2 is neg. T1 is Neg. Const.

Simulation Summary During Negative Cycle Top Bottom D1 is closed D2 is open Q2 is open Q1 is closed C1 is neg. C2 is zero T2 is neg. T1 is Neg. Const.

Real Circuit—Top View

Real Circuit—Bottom View

Transformer from a Microwave

Transformer and Circuit

Testing the circuit

Oscilloscope

Oscilloscope closed up

Measuring with a Voltmeter

Problems and Solutions Capacitors of 68uF were replaced with 2-33uF and 1-2.2uF Steel wire was used in the primary winding on transformer instead of copper wire Frequency = 1.3kHz No solution Vp-p = 40V No solution

Application Automobile -TV’s -DVD’s -VCR’s -Other household appliances

Conclusion Advantages -Low cost -Easy to built Disadvantages -Reliability -Efficiency

Conclusion (continuation) Who makes this product Future work - Further investigation to solve present problems: frequency, output voltage, load variation