Download pdf - Portable LED Lighting System Presentation · 2019-11-06 · Portable LED Lighting System Senior Design Fall 2014 ... LED array Two DC-DC converters Dimming function Washkewicz College

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


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


EXECUTIVE SUMMARY

→ Off-Grid Lighting:● Battery operated

● Solar rechargeable

● LED array

● Two DC-DC converters

● Dimming function


ADVANTAGES

→ Two key advantages over conventional forms of portable lighting

1. HIGH LIGHT OUTPUT

2. NO GENERATOR REQUIRED


DESIGN OBJECTIVE


HIGH POWERED

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


VERSATILE

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


ROBUST

● Highly Dependable LED Technology

● LEDs Not Susceptible to Premature Burnout

● Fully Rechargeable Batteries with High Cycle Durability


SYSTEM BLOCK DIAGRAM


BOOST CONVERTERREQUIREMENTS


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

● Supports Dimming

BOOST CONVERTER


BOOST CONVERTERKEY SPECIFICATIONS


● Duty Cycle○ High Boost Ratio○ High Duty Cycle

● Switching Frequency○ Losses and Efficiency

● Inductor Size○ Continuous Conduction○ High Input Current

BOOST CONVERTER SIMULATION RESULTS


BATTERY CHARGERREQUIREMENTS


● 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


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


PROJECT TIMETABLE


PROJECT TIMETABLE


BUDGET


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

● Cost Does NOT Include LED Array

SUMMARY


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

Circuit Designs○ Under $215

QUESTIONS?
