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MSU ECE 4522 - Design Document

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Requirements document for Power Generation with a PTO Driven Prime Mover Submitted to: Professor Joseph Picone ECE 4522 Senior Design II Department of Electrical and Computer Engineering Mississippi State University Mississippi State, Mississippi 39762 November 29, 2000 Submitted by: Jameson Smith and Brian Johnson Faculty Advisor: Professor Mark Halpin Department of Electrical and Computer Engineering Mississippi State University Mississippi State, Mississippi 39762 Tel: 662-325-3530 Email: {jts2, baj1}@ece.msstate.eduPTO Generator Page 1 of 21 ECE 4522 February 21, 2000 EXECUTIVE SUMMARY With an increase in the number of home-based businesses, it has become increasingly important to have a reliable emergency power source. This is especially true in rural communities. Rural distribution lines are often hard to patrol and untrustworthy in unfavorable weather conditions. Bad weather can cause outages that last for days. There are many emergency power options available, but few provide the power per cost and mobility options of Power Take-Off (PTO) generators. This design produces 15 kW of power. It requires a least a 30-hp motor with PTO capabilities. The generator sits on a cart that hitches to the PTO provider. The PTO generator includes PTO shaft, gearbox, a frequency meter, main circuit breaker, 240V receptacle, and a 120V receptacle. This unit costs under $1500 to produce. In designing this PTO generator, research was done in the areas of power generation, control systems, and equipment compatibility. Different designs from various PTO generator manufacturers were analyzed. Control operations were designed and tested on computer simulators in the Electrical Engineering building at Mississippi State University. From the simulations, more efficient and cost affective improvements were made to meet projected costs and functionality. Once the final design was determined, the control devices were fabricated for testing. After successful testing of the generator, a transport device was made to accommodate customer needs. PTO generators have many applications as a form of alternative power generation. However, PTO generators are still expensive relative to the income of the consumers that are targeted. This design will give a more affordable option for those consumers. This PTO generator is a powerful, durable, mobile power source for less money. However, it is limited to those with tractors and other equipment with PTO capability. This design may eventually result in similar PTO generators for cars and trucks. Every one with access to a motor vehicle can generate the power needed to run a home.PTO Generator Page 2 of 21 ECE 4522 February 21, 2000 TABLE OF CONTENTS ABSTRACT…………………………………………………………… 3 1. INTRODUCTION…………………………………………………….. 3 2. PROBLEM…………………………………………………………….. 4 3. OBJECTIVES…………………………………………………………. 5 3.1 Affordable PTO Power Generation……………………………… 5 3.2 Mobility and Ease of Use………………………………………….. 6 4. APPROACH…………………………………………………………… 6 4.1 Subsection………………………………………………………….. 4.2 Subsection………………………………………………………….. 4.3 Subsection………………………………………………………….. 5. TEST SPECIFICATION……...………………………………………. 8 5.1 Harmonics Test………………………………………………………8 5.2 Physical Packaging………………………………………………….. 8 5.3 Pspice Simulation…………………………………………………… 9 6. TEST CERTIFICATION……………………………………………… 9 7. SUMMARY…………………………………………………………….. 9 8. FUTURE WORKS……...……………………………………………… 10 9. ACKNOWLEDGEMENTS…………………………………………… 10 10. APPENDIX A……………………………………………………………11 11. APPENDIX B……………………………………………………………13 12. APPENDIX C……………………………………………………………16 13. APPENDIX D……………………………………………………………18 14. REFERENCES………………………………………………………… 19PTO Generator Page 3 of 21 ECE 4522 February 21, 2000 ABSTRACT This design project is on the power electronic system used in converting an AC voltage from a PTO generator to a DC voltage. It will then invert the DC voltage back to single phase AC, 60Hz voltage. The design will be able to handle a 15kW generator with the ability to provide power for an average home. The AC to DC converter will consist of a full-wave bridge rectifier. The DC to AC inverter will consist of four IGBT’s with switching determined by a Pulse Width Modulator. 1. INTRODUCTION In a growing society where an emphasis on home electronics has boomed, there is more need for reliable power sources. Utilities sometimes have problems in keeping these homes supplied with a consistent source, especially in many rural areas. Their distribution lines have high exposure and can run for many miles without any backup system available. This often leaves customers to fend for themselves when it comes to alternative power sources. A good alternative for many rural customers would be the PTO Generator. The 18th century was the beginning of modern discovery and harnessing of electricity. The earliest would be the discovery of the conduction of electricity by Steven Gray in 1729. In 1745, Georg von Kleist discovered you could control electricity by the use of the “Leyden Jar.” The next big steps came from Benjamin Franklin. Ben Franklin suggested lightning rods to protect homes from lightning strikes. This came form his realization of static charges in the air and that lightning was just electrical discharges. The next step in electricity would be the creation of devices that would produce electricity. This was led by Alessandro Volta. From 1799 to 1800, Volta created a “battery” made of copper,


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MSU ECE 4522 - Design Document

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