Portable LED Lighting System

Senior Design Fall 2014Department of Electrical and Computer Engineering

Washkewicz College of Engineering

Cleveland State University

Washkewicz College of Engineering ￭ Cleveland State University

TEAM MEMBERS

● Greg Roberts● Steve Vannuyen● Kevin Vizkelety● Nick Zallar

Washkewicz College of Engineering ￭ Cleveland State University

STATEMENT OF NEED

→ Sometimes a simple flashlight is not enough.● Disaster situations

● Construction sites

● Any medical teamo small emergency response team

o field hospital

o permanent hospital

Washkewicz College of Engineering ￭ Cleveland State University

EXECUTIVE SUMMARY

→ Off-Grid Lighting:● Battery operated

● Solar rechargeable

● LED array

● Two DC-DC converters

● Dimming function

Washkewicz College of Engineering ￭ Cleveland State University

ADVANTAGES

→ Two key advantages over conventional forms of portable lighting

1. HIGH LIGHT OUTPUT

2. NO GENERATOR REQUIRED

Washkewicz College of Engineering ￭ Cleveland State University

DESIGN OBJECTIVE

Washkewicz College of Engineering ￭ Cleveland State University

HIGH POWERED

● Indoor and Outdoor Lighting● Emergency Power Loss● 4000-5000 lumens● High System Voltage

Washkewicz College of Engineering ￭ Cleveland State University

VERSATILE

● Fully Portable● Zero Energy Cost● Self Sufficient● Easy Installation● Dimmable

Washkewicz College of Engineering ￭ Cleveland State University

ROBUST

● Highly Dependable LED Technology

● LEDs Not Susceptible to Premature Burnout

● Fully Rechargeable Batteries with High Cycle Durability

Washkewicz College of Engineering ￭ Cleveland State University

SYSTEM BLOCK DIAGRAM

Washkewicz College of Engineering ￭ Cleveland State University

BOOST CONVERTERREQUIREMENTS

Washkewicz College of Engineering ￭ Cleveland State University

● 12V Battery Input Power● Outputs○ 45 Watts○ 500 milliamps○ 115 Volts

● Supports Dimming

BOOST CONVERTER

Washkewicz College of Engineering ￭ Cleveland State University

BOOST CONVERTERKEY SPECIFICATIONS

Washkewicz College of Engineering ￭ Cleveland State University

● Duty Cycle○ High Boost Ratio○ High Duty Cycle

● Switching Frequency○ Losses and Efficiency

● Inductor Size○ Continuous Conduction○ High Input Current

BOOST CONVERTER SIMULATION RESULTS

Washkewicz College of Engineering ￭ Cleveland State University

BATTERY CHARGERREQUIREMENTS

Washkewicz College of Engineering ￭ Cleveland State University

● Support SLA Battery Chemistry○ 13.6 Volt Float Voltage○ 2.1 Ampere Max Charge Current

● Accept Solar Cell Input○ Varying Voltage○ Undervoltage Shutdown○ Maximum Power Point Tracking

PRELIMINARY CHARGERDESIGN

Washkewicz College of Engineering ￭ Cleveland State University

Based on Linear Technology LT3652 Controller

✓Programmable Float Voltage✓Programmable 2 Amps Max✓Auto-termination✓Undervoltage Shutdown✓Maximum Power Point Tracking✓Can Be Used In Parallel For >2 Amps

PRELIMINARY CHARGER DESIGN

Washkewicz College of Engineering ￭ Cleveland State University

PROJECT TIMETABLE

Washkewicz College of Engineering ￭ Cleveland State University

PROJECT TIMETABLE

Washkewicz College of Engineering ￭ Cleveland State University

BUDGET

Washkewicz College of Engineering ￭ Cleveland State University

● Preliminary Circuit Design <$215● Cost Includes:○ Solar Cell○ Battery○ Circuit Components

● Cost Does NOT Include LED Array

SUMMARY

Washkewicz College of Engineering ￭ Cleveland State University

● Portable LED Lighting System○ Battery Operated○ Solar Rechargeable○ Currently Simulating Preliminary

Circuit Designs○ Under $215

QUESTIONS?

Washkewicz College of Engineering ￭ Cleveland State University