Group #26 Andrea Solano-EE Juan Valera-EE Manuel Keesee-EE Randall Lay-EE

Transcription

1 Group #26 Andrea Solano-EE Juan Valera-EE Manuel Keesee-EE Randall Lay-EE

2 Table of Contents 1. Project Overview 2. Revision A/B 3. Final Revision 4. Time Line of Project 5. Group Responsibilities 6. Financials

3 Project Motivation: South Africa Pomolong Township Supply renewable energy to a small community center located in the Pomolong Township in South Africa Impact the lives of many by powering a essential electronics such as computer, a projector, lights, and other devices use for educational purposes

4 Pomolong Township Community Center Power Needs Item Watts Quantity Est. Hours Total Watt hours Lights Total Watts Computer charger Projector/ TV Energy in a single day: ~2 KW hrs Maximum Power 395 Watts

5 Goals & Objectives Charge a 24V battery bank safely and reliably Deliver necessary power to the user when demanded Deliver necessary energy types to the user when demanded (i.e. USB, American standard (110V), and European standard (220V)) Overall robust and reliable energy storage system

6 Design Specifications Input Source ~ 24V 30V (DC) System Power Output ~ 2000W AC Voltage: 110Vrms & 220Vrms DC Voltage: 5Vdc (USB port) 24V Battery Bank Utilization of wind and Solar energy sources

7 Table of Contents 1. Project Overview 2. Revision A/B 3. Final Revision 4. Time Line of Project 5. Group Responsibilities 6. Financials

8 Components Overview Revision A PV Panels MPPT Charge Controller Battery Bank Inverter Wind Turbine PM Bypass Circuit USB Rectifier Housekeeping E Controller Transformer Dump Load

9 Renewable Energy Sources Sources provided by the mechanical Engineers: Solar tracking team Wind tower team Lessons Learned: Communication is key Larger amount of people on a project can add more problems than solve

10 Components Overview Revision A PV Panels MPPT Charge Controller Battery Bank Inverter Wind Turbine PM Bypass Circuit Rectifier Housekeeping E Controller Transformer Dump Load

11 Charge Controller Sch has a 12V system needs to be 24V Buck & Boost Converter MOSFET CSD18532KCS 60-V, N-Channel Power MOSFETs Buck Mode Boost Mode

12 Lessons Learned: Modes of a MOSFET Cutoff V GS <V th Linear Region V GS >V th and V DS < V GS V th Saturation V GS >V th and V DS >= V GS V th Ringing in MOSFET High Frequency Low Current Robust and Forgiving Charge controller Buck & Boost Converter

13 Charge Controller H- Bridge Driver: SM72295 Parameter SM72295 Switching frequency 220kHz Analog Supply Voltage Digital Supply Voltage 10 V 5 V Peak Output Current Operating Temperature Other Features 3 A -40 C to 125 C Current Sense Amplifiers Lessons Learned: Limited ability to sink current i.e. lower the external gate resistor value

14 Charge Controller SM72442 Parameter Analog Supply Voltage Digital Supply Voltage Input Current at any pin Package Input Current Operating Temperature SM V to 6V -.3 to 6V max 10mA 20mA -40 C to 105 C Lessons Learned: Sensitive to electrostatic shock and/or any other voltage than the required 5V I2C communication (for this device) requires recurring start bit not stop bit then start bit

15 Printed Circuit Board Data Schematic

16 Printed Circuit Board Data Schematic

17 Printed Circuit Board Power Schematic

18 Printed Circuit Board

19 Table of Contents 1. Project Overview 2. Revision A/B 3. Final Revision 4. Time Line of Project 5. Group Responsibilities 6. Financials

20 Components Overview Final Revision PV Panels Lead-Acid Battery Charger Battery Bank Inverter Wind Turbine Rectifier Housekeeping E Controller Transformer Dump Load

21 Lead-Acid Battery Charger UC3906 Parameter Input Voltage Charging stages Maximum Current to battery Package Power Consumption UC3906 <40 Volts Bulk Absorption Float 15 Amps Dip Pin 16mW 33 mw

22 Housekeeping Controller PV Panels Lead-Acid Battery Charger Battery Bank Inverter Wind Turbine Rectifier Housekeeping E Controller Transformer Dump Load

23 Housekeeping Controller Overview Solar Charging Interface Wind Turbine Charging CPU Housekeeping Controller Voltage and Current Data on the Sources

24 Data Collection ADS7830 Parameter ADS7830 package TSSOP 16 A/D Pins A/D conversion Communication Protocols Voltage Supply Power Consumption 8 single-ended 4 differential 8-bit 70-ksps Internal/external reference *I2C 2.7V 5V 180 uw (Standard Mode)

25 Housekeeping Controller Solar Charging Interface Wind Turbine Charging CPU Housekeeping Controller Voltage and Current Data on the Sources

26 Housekeeping Controller LCD Screen: LCD Parameter Communication Operating Voltage Operating Current 16x2 LCD *I2C 5V 60mA Power Consumption Cost $10 ~ 300mW

27 Housekeeping Controller I2C 3.3V to 5V Voltage Leveler Parameter TCA9406 Operating Voltage Level Translation Range Vcca:1.6 V-3.6 V Vccb:2.3 V-5.5 V 3.3 V to 5 V Communication I2C (For LCD screen)

28 Housekeeping Controller Solar Charging Interface Wind Turbine Charging CPU Housekeeping Controller Voltage and Current Data on the Sources

29 Housekeeping Controller MSP430G2553 Parameter Chip I/O Pins Analog to Digital Conversion Pins Communication Protocols MSP430 LaunchPad MSP430G pins: P1.0-P1.7 P2.0-P bit 200-ksps *I2C *SPI *UART Voltage Supply 1.8V 3.3V Power Consumption < 1mW

30 Logic Diagram Start-up User Selected Mode Wind Only Mode Turbine Connect to battery Solar Only Mode Enable UC3906 All Off Mode Disable UC3906 TRUE Disable Turbine connect to battery If Vbatt > 26.5V FALSE charge battery Turbine voltage stable Turbine connect to battery Keep voltage stable

31 Wind Turbine Control PV Panels Lead-acid battery charger Battery Bank Inverter Wind Turbine Rectifier Main E Controller Transformer Dump Load

32 PV Panel Control PV Panels Battery Bank Inverter Wind Turbine Rectifier Main E Controller Transformer Dump Load

33 Storage Unit PV Panels Lead-acid battery charger Battery Bank Inverter Wind Turbine Rectifier Main E Controller Transformer Dump Load

34 Storage Unit Lead-Acid Charging Stages 1 st Stage: Bulk 2 nd Stage: Absorption 3 rd Stage: Float

35 Load Distribution PV Panels Lead-acid battery charger Battery Bank Inverter Wind Turbine Rectifier Housekeeping E Controller Transformer Dump Load

36 Output Component Inverter Design: Aims PWRINV2.5K Watt Parameter Max. Power Surge Power Wave Output Operating Input VDC AIMS 2.5kW 5kW Modify Sine Wave Volts Full Load Efficiency 90% Operating Temperature Weight -15 C to 55 C 14 lbs Cost $280

37 8 in Output Components AC-AC Transformer: SevenStar THG-1000 Parameter Outlet Voltage Conversion Max. Power output Dual Step Voltage Transformer 3 American Or 2 European 110V to 220V 220V to 110V 1000Watts Weight 17 lbs

38 Printed Circuit Board Schematic

39 Enclosure Enclosure box Add it when everything in it

40 Table of Contents 1. Project Overview 2. Revision A/B 3. Final Revision 4. Time Line of Project 5. Group Responsibilities 6. Financials

41 Andrea I2C Communication User Interfacing Juan Lead Acid Battery Charger Enclosure Manuel DC-DC Buck Voltage Regulators Storage System Randall PCB Design Programming Logic

42 Table of Contents 1. Project Overview 2. Revision A/B 3. Final Revision 4. Time Line of Project 5. Group Responsibilities 6. Financials

43 Time Line of Project January February March April Jan 15 th - January 31 st Purchase IC devices Design circuit Keep research microcontroller Feb 1 st -February 15 th Prototype design February 22 nd CDR Presentation Feb 23 rd March 1 st I2C code ready Purchase components March 2 nd March 10 th SPRING BREAK March 11 th March 30 th Communication integrate circuits troubleshooting Purchase PCBs Failed communicating April 1 st April 9 th Design prototype revision C Test prototype Purchase PCB Successfully communicating

44 Table of Contents 1. Project Overview 2. Components Breakdown 3. Responsibilities 4. Milestones 5. Financials

45 Budget Part Number/Device Cost per Parts Number Parts Total Cost Charge Controller Printed Circuit Board $1, $1, Circuit Board Components $ $ SchmartBOARD $ $90.00 LCD (Display) $ $15.00 Dummy Load MFJ-263 $ $99.95 Battery PVX-1080T Battery $ $ Inverter Aims 2500 Watt $ $ Transformer SevenStar THG-1000 $ $80.00 Enclosure Wood + Plexiglass $ $ port usb charger/ Outlet Socket $ $25.00 USB Fan $ $76.00 Microcontroller MSP430G2552 $ $8.00 Solar Panel $ $0.00 Miscelaneous $ $ $0.00 Total $2,253.95

46 Questions?