Progress Report 1

Elec 499A
May 25, 2001

Sodium Streetlight Dimmer Project
Progress Report

From:
Bob Laplante

Jenny McPhail
Geoffrey Shera

To: Dr. Subhasis Nandi

Introduction and Problem Definition
There exists a need for a high pressure sodium streetlight dimmer. This device would allow intensity and power control over HPS streetlight and would  be operated during times of low power generation or during times of low activity such as the early morning hours. This device will be designed for retro-fit to a conventional HPS ballast system. It will provide the capability of efficiently controlling the power output of a HPS streetlamp from 100% down to 40% of full intensity. The device will be micro-controller operated so it may be implemented into an existing product.

This project is sponsored by Streetlight Technology Inc. (STI) in Victoria, who will provide materials, guidance and advice. The fundamental project design will be performed by the 499 project team, Jenny McPhail, Bob Laplante, and Geoff Shera. The project supervisor is Dr.Nandi. Working on this project with STI requires the understanding and signing of a non-disclosure agreement.

Project Scope and Method of Solution
1. Research current patents regarding HPS dimmer technologies.  Evaluate the patents and determine whether to use these technologies or provide a new design approach. STI is willing to license a cheap and effective technology.

2. Determine that the dimmer can be effectively modulated to produce several different levels of energy savings. The starting range would be 40% of full power to full power.

3. Design the dimmer circuit(s) from the top-down. Implement several methods for the dimming technologies including promising patented designs

4. Time permitting, prove the efficiency of the dimmer circuit in all standard lamp power units, 70W, 100W, 150W, 200W, 250W, and 400W.

5. The final report must include an in depth discussion of how lamp dimming is achieved so STI may continue with the design.

Task Assignment and Timeline
The project will be split up into three phases, research, design and testing, and final documentation.

Phase 1 Research
Now to Wednesday May 30

Phase 2 Design and Testing
May 30 to June 27 (4weeks)

Phase 3 Final Documentation
June 27 to July 18 (3weeks)

July 27 Poster presentation web and final report submittal.

Gant Chart