The design of Class-EF₂ inverters using multi-objective optimization

Peddle, Andrew (2022) The design of Class-EF₂ inverters using multi-objective optimization. Masters thesis, Memorial University of Newfoundland.

[img] [English] PDF - Accepted Version
Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.

Download (2MB)


This thesis explores the use of multi-objective optimization algorithms for the design of high frequency inverters. A state-space model of the ideal Class-EF₂ inverter is derived and its accuracy is validated by MATLAB and LTSpice simulation. The model is then applied to the Multi-Objective Genetic Optimization (MOGO) and Multi-Objective Particle Swarm Optimization (MOPSO) algorithms to design three inverters with varying output power, frequency, and load requirements. The final designs are compared with analytical results to verify the optimization-based design approach. The ideal state-space model is then extended to include the parasitic elements of components, and further extended to consider the internal resistances and capacitances of the switch. These new models are applied to the MOGO and MOPSO algorithms to design the same three inverters as the ideal case. The final designs are simulated in LTSpice to evaluate their performance, and comparisons are presented to demonstrate the effects of the parasitic elements and switching dynamics on the component values and overall circuit operation. A design example is also presented to demonstrate the design of a 6.78 MHz, 100W, 20 Ω Class-EF₂ inverter, and provide designers with insight on how to apply the proposed design approach to their own designs.

Item Type: Thesis (Masters)
Item ID: 15488
Additional Information: Includes bibliographical references (pages 91-93).
Keywords: Class-EF inverter, wireless power transfer (WPT), particle swarm optimization genetic optimization
Department(s): Engineering and Applied Science, Faculty of
Date: May 2022
Date Type: Submission
Digital Object Identifier (DOI):
Library of Congress Subject Heading: Wireless power transmission; Mathematical optimization; Swarm intelligence; Particles (Nuclear physics); Electric inverters; Artificial intelligence ; Computational intelligence.

Actions (login required)

View Item View Item


Downloads per month over the past year

View more statistics