This Master of Applied Science thesis proposes a new design of low
power, power factor corrected (PFC), power supplies. By lifting the
hold up time restriction for devices that have a battery built in,
the energy storage elements of the converter can be reduced,
permitting a small and inexpensive power converter to be built. In
addition, a new control technique for controlling cascaded
converters is presented, named duty mode control (DMC). Its
advantages are shown through simulations. The system was proven
using a prototype developed in the laboratory designed for a
universal ac input voltage (85 - 265VRMS at 50 - 60Hz)
and a 40W output at 12V. It consisted of two interleaved phases
sensed and digitally controlled on the isolated side of the
converter. The prototype was able to achieve a power factor of
greater than 0.98 for all operating conditions, and input harmonic
current distortion well below any set of standards.
| Identifer | oai:union.ndltd.org:TORONTO/oai:tspace.library.utoronto.ca:1807/33727 |
| Date | 04 December 2012 |
| Creators | Frost, Damien F. |
| Contributors | Lehn, Peter W., Prodic, Aleksandar |
| Source Sets | University of Toronto |
| Language | en_ca |
| Detected Language | English |
| Type | Thesis |
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