This thesis presents the operational principles, and analysis, simulation. experimental results of a single-cell full-bridge high frequency (HF) transformer isolated DC-to-DC power converter with an inductive output filter controlled with a new gating scheme. A single-stage multi-cell HF transformer isolated AC-to-DC power converter with the same new gating scheme is designed and tested. The new gating scheme is implemented in a Field-programmable gate-array (FPGA) chip to generate the control gating signals for the DC-to-DC and AC-to-DC converters.
The steady-state operation of the DC-to-DC converter controlled with the new gating scheme is analyzed using the equivalent circuits during different intervals of operation. Based on the operational analysis, a set of equations is derived to draw design curves. A design example of 5 kW, 580 V to 620 V input and 420 V output DC-to-DC converter is given to present the design procedure. PSPICE simulation and experimental results obtained from an experimental converter controlled with the FPGA are provided to verify the theoretical analysis, and design procedure. A systematical procedure for finding the parameters of the output RCD snubber circuit is also given.
A 3 kW 3-cell 166 V to 260 V input 420 V output single-stage HF transformer isolated AC-to-DC multi-cell converter is designed and tested using a FPGA controller
The new gating scheme is implemented on a Xilinx Spartan 11 FPGA chip using two digital pulse-width modulation (DPWM) approaches, the conventional DPWM module and the delay-line DPWM module. The simulation and experimental results are presented.
| Identifer | oai:union.ndltd.org:uvic.ca/oai:dspace.library.uvic.ca:1828/1986 |
| Date | 16 December 2009 |
| Creators | Luo, Fei |
| Contributors | Bhat, Ashoka Krishna Sarpangal |
| Source Sets | University of Victoria |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Rights | Available to the World Wide Web |
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