Energy Tracking & Storage for an Autonomous System

OASIS

Mir Ziyad Ali Liron Kopinsky Christopher Wallace Sarah Whildin Joseph Yadgar

Top Level Overview

Work Division

     Mir Ziyad Ali Sarah Whildin Joseph Yadgar Light Detection System Integration Chris WallaceHardware Design Implement Software Liron Kopinsky Power Movement Software Design Implement Software Liron Kopinsky

Liron Kopinsky

Liron Kopinsky

Chris Wallace

FPGA/PCB Interface

 Ribbon Cables to Headers on the PCB  Configurable CMOS-CMOS Level Shifters.

 VCC determines input level  VDD voltage determines output level  6 Shifters per package Chris Wallace

Power Save Mode Hardware

PIC16F688 Program Memory: 7168 bytes -RAM: 256 bytes -Data EEPROM 256 bytes -Timer(8-bit, 16bit), Interrupts Chris Wallace

Chris Wallace

User Input and LCD

 Push buttons on Spartan board to toggle information on LCD.

 Optrex 16x4 parallel display.

 Uses HD44780 controller chip  Will use GPIOs for writing to LCD.

Chris Wallace

Parts List

 7 - MC14504B CMOS-CMOS level shifters  1 – Optrex 16x4 LCD  1 – Spartan 3 Starter Board  3 – 40 Pin Headers  1 – PIC16F688  1 – IRF640 HEXFET Power MOSFET Chris Wallace

Power System

A/D Conversion

for sending signal to FPGA to know how much output Current coming from the PV Cells Three

Solar Panels

Connected in series to produce 27 Watts (18V x 1.5A) PV Cell Output

Charge Controller

for the Solar Panel. It’s using PWM charging principle to optimize battery charging. Optimized Output

A/D Conversion

for sending signal to FPGA to know how much charge left into the battery Battery Output Step-Down DC DC Switching Regulator to produce 1.5 A, 5V for the FPGA To FPGA Mir Ziyad Ali

Space Age Solar Panels

Highest Power to Size Ratio + + + Charge Controller      SPE – 500 Dual Output Panels for 6 & 12 Volt Charging Systems.

Single-crystal silicon super cells used in space satellite applications. Lightweight and durable design-panels are encapsulated, temperature and weather resistant.

Three Panels connected in parallel to produce 27 Watts (1.5A, 18V) for the entire system.

Total weight is about 57 oz (3.52 lbs) Size W" x L" : 12.25" x 26.25" Mir Ziyad Ali

0- 18 Vdc V2

Charge Controller

D1 L1 C3 1 2 66uH 440uF MUR820 2 C1 220uF Q1 L2 333uH C2 220uF IRF640 Load 100 1 R6 10k R3 C6 4.7nF

R2 2.8k

120 1 2 3 4 5 6 7 8 UC3525A Inv Input N.I. Input Sync Osc Output CT RT Dischar ge Soft- Start VREF +Vin Output B Vc GND Output A Shutdown Compensator 16 15 14 13 12 11 10 9 C5 22uF R4 33k TSC427 1 2 3 4 NC IN A NC OUT A GND IN B Vdd OUT B 8 7 6 5 C3 100nF C4 100nF R1 800k 12 Vdc 12 Vdc C8 C7 1uF R8 47nF LF 356 796 + OPAMP OUT V1 V1 D4 D1N750 Mir Ziyad Ali

Deep Cycle Battery

 o o o      BP28-12 Maintenance - Free Rechargeable Sealed Lead-Acid 6 cell (in series) Battery.

28 Ah 12V Storage capacity, which will supply power to our system for 6 hrs before recharging it for 18 hours with 1.5A charging current. 20 hour rate F.V.(1.75V/cell) (1400 mA to 11.50 volts) Approximate Weight 9600g (21.17lbs) Maximum charge current is 8.5A

Dimension (inch) Length ..........6.89

Width ............6.54

Height............4.92

Mir Ziyad Ali

Switching Regulators

         For all step-down DC-DC voltages, I’ll be using state-of-the-art TI’s PTN78000W: a series of high-efficiency, step-down Integrated Switching Regulator (ISR). This ISR will help me to reduce system power loss significantly contrary to linear voltage regulator that has considerable loss. It features 1.5-A Output Current Wide-Input Voltage (7 V to 36 V) Wide-Output Voltage Adjust (2.5 V to 12.6 V) High Efficiency (Up to 95%) On/Off Inhibit Output Current Limit Overtemperature Shutdown Operating Temp: –40 ° C to 85 ° C Mir Ziyad Ali

Parts List

           

MUR 820 200V 8A TO-220AC Ultrafast POWER Diode IRF640 HEXFET Power MOSFET 200V 18A UC3525A PWM Chip 100kHz Pulse TSC427 MOSFET Gate Driver LF356 Operational Amplifiers 220

μ

F [4], 10

μ

F[4], 1

μ

F [2], 1 nF [4] Capacitors Transformers [2] (Inductance is determined) 1N4730 Diode 1k – 800 k

Ω

range Resistors.

SPE-500 18V, 500mA Solar Panel [3] BP28-12 Lead Acid Battery PTN78000W [2] and PT78ST105 [2] Switching Regulators

Mir Ziyad Ali

LED Light Sensors

Joseph Yadgar

8:1 Multiplexer

Joseph Yadgar

Part List

    Green LEDs (10) ADC0804 Analog to Digital Converter Chips (10) LF356N Op Amp Chips (10) MAX308 8-Channel Analog Multiplexers (8) Joseph Yadgar

Printed Circuit Board

 Four layer board  Everything will be on the PCB except for the power system.

 We will be mounting the devices using both surface mounts and DIPs.

 We plan to have our first PCB layout done in the next week.

Joseph Yadgar

Motor Control System

Overview

 Logic signals sent from microprocessor to motor control system.   Shaft encoders detect position information.

Sarah Whildin

Motor Control Schematic

Sarah Whildin

Part List

     2 Stepper Motors with shaft encoders – Model AM23-150-2-ENC from Advanced Micro Systems, INC.

2 Motor Drivers – KA3100D from Fairchild Semiconductor 6 Optoisolators – Model 6N138 2 quadrature decoders – Model HCTL – 2032 from Agilent. Various Capacitors and Resistors Sarah Whildin

Questions

OASIS

Mir Ziyad Ali Liron Kopinsky Christopher Wallace Sarah Whildin Joseph Yadgar