team 28 (s.p.o.c.) solar power optimized cart. team members cameron boozarjomehri computer...

TEAM 28 (S.P.O.C.)Solar Power Optimized Cart

TEAM MEMBERS

Cameron Boozarjomehri

Computer Engineer

Team Leader

Jacob Bitterman

Electrical Engineer

Hardware Lead (Leader of away team)

William Ellett

Computer Engineer

Software Lead (redshirt 1)

Zaza Soriano

Team Mentor

Consultant (Supreme Overlord)

Dr. Richie Being a Swell Guy

Sponsor

Duke Energy

MOTIVATION

Desire to work with Solar Technology

Interested in transportation project

Environmental conservation interests

Have an excuse to drive a golf cart to and from campus

CURRENT METHODOLOGY (SEV)►Solar Electric Vehicle

►Gas Power converted to Electric

►Cost: $25,000

CURRENT METHODOLOGY (TESLA SUPERCHARGER)►Solar Power station for the model S

►Electric car using charge stations►Cost: $62,400 (1,170 for Vehicle Dock)►Super Charge station incorporate PV cells (Separate Assembly)

CURRENT METHODOLOGY (UCF ZENN)►Zero Emission No Noise►Electric Car modified with a PV array►Cost: $15,995 (just car, no integrated PV hookup)►Range of 35 Miles

GOALS Electric vehicle

Powered solely by photovoltaic cells

Able to drive as long as possible given adequate sunlight

Able to charge while driving

Vehicle drive modes to control performance Performance mode

Balanced mode

Eco mode

Clearly Demonstrate vehicle information to user Battery life/longevity

Vehicle current mode

Charge time

Range

SPECIFICATIONS

Cart can reach top speeds in excess of 10 miles per hour Considered normal for this model cart

Cart will have parallel charging circuits

Vehicle load capacity of 700lbs (including passengers and all components)

Charge from no energy in 6 hours during optimal sunlight exposure

SPECIFICATION CONT.

Rear panel adjustable with 80º of freedom to optimize solar energy collection

Optimization system that suggests best panel angle to within 5º

User Interface Displays current drive mode (Performance, Balanced, Eco Boost)

Display current maximum range in miles +/- 1 mile

Display speed in mph to nearest 1/10th of a mile

Display energy absorption rate in watts to nearest watt

Battery charge percentage accurate to nearest whole percent

GOALS/SPECIFICATIONS OF DRIVE MODE

All drive modes have emergency shutoff to protect cart components

Drive Mode Performance Balanced Eco Boost

Tuning Favors Speed Behaves Normally Favors Range

Requirements Cart is able to surpass factory restricted top speed

Vehicle operates within standard factory settings

Cart is able to surpass factory specified top range

Performance Targets Cart can go in excess of 14 mph

Cart can travel more than 25 miles between charges

Cart travels as long as possible past 25 miles between charges

Intended Design settings

Vehicle uses both battery and solar panel output to maximize speed and acceleration

Cart uses battery power only for normal cart function

Combines Battery and Panels in parallel, while limiting speed/acceleration to maximize range

OVERALL BLOCK DIAGRAM

Solar Panels

Micro-Controller

MPPT

BluetoothGovernor

/MotorOnboard Display

Batteries

COMPONENT POSITIONING (SIDE)

7’ 9.5”

5’ 7.5”

Solar Panels 5’ 4”

Display

Microcontroller Housing

Battery Housing

*Banana for Scale

COMPONENT POSITIONING (BACK)

Microcontroller Housing

5’ 7.5”

3’ 11”3’

3”

5’ 4”

VEHICLE (GOLF CART)Specs E-Z-GO Freedom-

TXT 36 Volt Electric Golf Cart (2005)

Energy Source Trojan 105h 6Volt Deep Cycle wet battery (x6) DC

Motor 36-volt 4-hp@4400 rpm(can handle up to 48 volts)

Projected Top Speed 20mph

Realistic top speed 10mph

Load Capacity 800 pounds

Price $1,600.00 after tax

PHOTOVOLTAIC OPTIMIZATION

Solar Panels

Micro-Controller

MPPT

BluetoothGovernor

/MotorOnboard Display

Batteries

SOLAR (PHOTOVOLTAIC) PANELSpecs Grape Solar GS-S-

390-TS390-Watt Monocrystalline Solar Panel

Grape Solar GS-S-250-Fab5250-Watt Monocrystalline Solar Panel

Power Film Solar Charger, RV-15-390060-Watt

Rated Power 390W 250 Watts 60 Watts

Watts 341 (PTC) 222.1 (PTC) 54.5 (PTC)

Max Voltage 49.4V 31.7V 15.4V

Cell Efficiency 15.2% 15.4% 10.6%

DimensionsL x W x T

77.2” x 51.5” x 1.57” 64.6” x 39” x 1.57” 80.05” x 26.14”Flexible

Price $969.00 $374.99 $1,382.00

MICROCONTROLLERSpecs MSP430G2xx 16 bit

MicrocontrollerATmega328

Operating Voltage 1.8-3.6V 1.8-5.5V

Flash Memory 56Kbytes 32Kbytes

I/O Pins 14/20 32

Operational Range -40 to 85C -40 to 85C

IDE MSP-EXP430G2 Arduino IDE

Price $12.50 $12.84

MPPT SENSORSSpecs Phidgets RB-Phi-86

Precision Voltage Sensor

AttoPilot Voltge/Current Sense Breakout – 45A(Added to PCB)

Voltage max 40V 51.8V

Current Max N/A 44.7A

Current offset 3.6mA ≈ 0

Easily added to PCB? no yes

DimensionsL x W x T

19mm x 19mm x 4mmApprox.

19mm x 15mm x 4mm

Price $19.00 $19.95 (x2)

MPPT DESIGN

DC-DC converter

DC-DC converter

COMPONENT POSITIONING (BATTERIES)

Thermal Sensors

Thermal Sensors

18 Volts per circuit

BATTERY

Specs Smart Battery 12V 40AH Lithium Ion Battery Kit

Trojan Line Flooded Deep cycle 6V battery(Model T-105)

Voltage 12.8V 6V

Max Capacity 80A-H 225A-H

Weight 46.0lb 62lb

DimensionsL x H x W

7.75” x 6.87” x 6.50” 10.375” x 7.125” x 10.875”

Temperature Range -15 to 70 C -20 to 45 C

Price $672.90 $149.00

ADDITIONAL SENSORSTMP36 – Temperature Sensor

SEN-09088 Mini Photocell

2.7 to 5.5 V 100mW Max Power

10 mV/C Sensitivity 150V Max Voltage

±1 C at -40 to 125C(In battery operational range)

-30 to 70C Responsive range

Dimensions5 x 4 x 3mm13mm lead length

Dimensions2 x 4 x 5mm31mm lead length

$1.50 (x6) $1.50 (x2)

18mm 33mm

DRIVE CIRCUIT

Solar Panels

Micro-Controller

MPPT

BluetoothGovernor

/MotorOnboard Display

Batteries

DRIVE MODESStandard ModeEco Boost ModePerformance Mode

DISPLAY

Solar Panels

Micro-Controller

MPPT

BluetoothGovernor

/MotorOnboard Display

Batteries

COMPONENT POSITIONING (DASH BOARD)

B0 B1

USER DISPLAYSpecs Adafruit Blue

Character OLED 16x2

Adafruit HDMI 4 Pi – 10.1” Display 1280x800 IPS – VGA/NTSC/PAL

Resolution 16 characters x 2 rows

1280x800 pixels

Lighting LED Pixel-based White LED backlight

Required Voltage 3/5V 5-12VDC

Easily added to PCB? no no

DimensionsL x W x D

80mm x 36mm x 10mmApprox.

230mm x 150mm x 5mm

Contrast ratio 2000:1 800:1

Price $27.95 $144.95

USER DISPLAYProgram

start

Display welcome

page

Drive Mode menu

Range menu

B0 B0 Speed menu

B0 Energy menu

B0 Battery charge menu

B0

Display current mode

B0

B1 (change mode)

B1

Display range

B0B1

Speedometer

B0B1

Display energy consumption

B0B1

B0

Display current battery levels

B0B1

PROJECT BUDGETComponent Budgeted

CostActual Cost Difference

Cart $1,999.00 $1,600.00 +$399.00

Battery $0.00 $0.00 $0.00

PV Cells $433.95 2x $374.99 -$316.03

Screen $149.95 $27.95 +$122.00

Controller $91.89 $55.00 +$36.89

Sensors, etc. $0.00 $69.90 -$69.90

Total: $2,674.79 $2,502.83 +$171.96

TIMELINE

11 10 7 7

Panel/Component Mounting Charge Circuit Testing Power Mode Testing

User Interface Testing Attempting Stretch Goals

-Labeled in Days

Feb 28thNow

Feb 18th

Mar 14th

Mar 7th

Apr 19th

STRETCH GOAL Bluetooth

• Redundant Data Distribution from display

• Android application converts Metadata to useful displays

PV Optimization using GPS

• Phone GPS used to look up module determines cart orientation

• Cart heading relayed via Bluetooth

• Application suggests panel angle and cart heading based on time/position

DISTRIBUTION OF LABORTask Jacob Bitterman Cameron

BoozarjomehriWilliam Ellett

Battery Motor Connection

X X

Maximum Power Point Tracking

X X

Battery Charging Circuit

X X

Power Switching and Distribution

X X

Drive Mode Implementation

X

Microcontroller and Sensor Connections

X

Panel Positioning System (PPS)

X

User Interface X X

Overall

Testing

Prototyping

Design

Research

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

25%

10%

10%

30%

90%

Progress

QUESTIONS?