LED Replacement for Fluorescent Tube Lighting
An LED based lamp has been developed as a replacement for fluorescent tubes. It employs a string of “White” LEDs to provide the majority of the light, with a string of Blue/Cyan LEDs and a string of Red/Red-Orange LEDs to provide spectral enhancement and variable colour temperature. A novel hysteretic topology combining the constant current drive of all three LED strings, the circuit’s bootstrap power supply and battery-backed emergency operation with a single coupled inductor has been implemented. This topology is also inherently capable of transmitting low bandwidth data on the fly.
It has been demonstrated that the efficacy is higher than the best fluorescent lamps, the spectrum can be tuned to give a very close approximation to the CIE D65 illuminant (as required in graphics studios) and Zigbee wireless networking has been implemented to remotely control of groups of lamps from a PC-based GUI.
“Solar Bright have been involved with EPECentre for 3+ years during which time we have built a great relationship, all working and progressing forward with the LED project and still after 3 years continue with great enthusiasm and gusto. On our journey with EPECentre, other departments of the University have been involved along with many other industry experts to make this project fly through each stage. It’s great working with EPECentre staff and would do it all again.” – Nicola Martin, Managing Director, Solar Bright
Below: Corrected LED lamp spectrum vs illuminant D65
Modelling and Design of Partial Core Transformers
We have had successful performances with resonant, high temperature superconductor and ambient temperature power transformers, and also a superconducting fault current limiter/transformer.
From world energy use to continental regions and the New Zealand electricity market.
Feasibility studies of photovoltaic systems for Pacific Island schools including Tonga and The Solomon Islands.
New Zealand distribution companies have been increasingly experiencing power quality problems due to the changing nature of the loading. As a result the Electricity Engineers’ Association, which represents the electricity supply industry, in conjunction with the New Zealand Government, funded a 3-year project to develop Power Quality (PQ) Guidelines for New Zealand. Being a small island country, with a relatively weak system, research was required into the most appropriate PQ limits. Straight adoption of international standards was not seen as appropriate without ensuring they were suitable for the New Zealand environment. This project researched the characteristics of the New Zealand electricity network, and what it could withstand, along with the characteristics of existing and new technologies, to develop PQ Guidelines that will ensure efficient and reliable operation of electrical equipment on the network.
Other Past Research
- Partial Core Super-Conducting Transformer Development- Stage I - CanterburyTX
- Fluorescent Light Flicker Research- Stage I – Orion & Enermet
- Lightning Arc Technology Development - VIVA
- Renewable Energies and Energy Efficiency for Scott Base Antarctica – Antarctica NZ
- Marine Electricity Generation R&D – Pearson Innovations
- Energy Efficiency Projects – Demand Response