Streetlight Dimmer Project
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
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
Geoff Shera: Get working Luminary from STI for evaluation of designs and ideas for implementation. Get research materials on the theory of High Intensity Discharge lamps and methods of operation. Review patent circuits located by Bob. Negotiate with supervisor regarding non-disclosure agreement, and with UVIC about lab space and use.
Phase 2 Design
May 30 to June 27 (4weeks)
Accumulation and selection of most promising designs, patented and otherwise.
Up to three of the designs will be implemented, tested for functionality and efficiency.
Phase 3 Final Documentation
June 27 to July 18 (3weeks)
Everybody: Accumulate data. Write final report. Web design and creation. Poster presentation.
July 27 Poster presentation web and final report submittal.