Publication Date
2015
Document Type
Thesis
Committee Members
Marian K. Kazimierczuk, Ph.D. (Advisor); Yan Zhuang, Ph.D. (Committee Member); Lavern Alan Starman, Ph.D. (Committee Member)
Degree Name
Master of Science in Electrical Engineering (MSEE)
Abstract
A PWM Z-bridge source dc-dc converter has a potential to play a prominent role in renewable energy applications, as it provides boosted and regulated output voltage and also behaves as an intermediate buffer between the source and the load. A complete circuit analysis of the Z-bridge source converter is needed to understand the operation of this converter. Steady-state analysis of pulse-width modulated (PWM) Z-bridge source dc-dc converter operating in continuous conduction mode (CCM) is given. Expressions describing waveforms of voltages across and currents through the all components of the PWM Z-bridge source dc-dc converter to operate in steady-state condition are derived. The output-to-input voltage conversion ratio for ideal (lossless) and non-ideal (lossy) conditions are derived. Expressions for the minimum Z-network inductance, the minimum filter inductance, and the minimum Z-network capacitor are derived to operate converter in CCM. To determine the total power loss in PWM Z-bridge source dc-dc converter, power loss expressions for each and every component and the overall efficiency of the PWM Z-bridge source dc-dc converter are determined. Using power loss expressions, the efficiency analysis graphs are plotted using MATLAB to obtain the suitable operating region for the PWM Z-bridge source dc-dc converter in terms of duty cycle, output current, and input voltage. An example of PWM Z-bridge source dc-dc converter is considered and steady-state analysis is performed in saber. The simulation results of designed PWM Z-bridge source dc-dc converter are used to validate the theoretical results. Plant characteristics of PWM Z-bridge source dc-dc converter are performed and the results are reported.
Page Count
68
Department or Program
Department of Electrical Engineering
Year Degree Awarded
2015
Copyright
Copyright 2015, all rights reserved. My ETD will be available under the "Fair Use" terms of copyright law.
