Title page for ETD etd-06062008-162614


Type of Document Dissertation
Author Groves, James O.
URN etd-06062008-162614
Title Small signal analysis of nonlinear systems with periodic operating trajectories
Degree PhD
Department Electrical Engineering
Advisory Committee
Advisor Name Title
Lee, Fred C. Committee Chair
Baumann, William T. Committee Member
Borojevich, Dushan Committee Member
Chen, Dan Y. Committee Member
Layman, John W. Committee Member
Keywords
  • controls
  • harmonic-balance
  • power supply
Date of Defense 1995-04-05
Availability restricted
Abstract

A new method for small-signal analysis of switching power converters is developed and implemented in a computer program. The method is derived for systems where the nonlinearities can be described by elements that can take on one of two values, based upon a controlling variable. Another requirement is that the system be periodic. The method is shown by examples to be very accurate, even at high frequencies. It predicts the subharmonic oscillation that can occur in converters with constant-frequency current mode control. It is implemented using the COSMIR program to solve for the state equations and for steady-state, making a general power supply simulation program.

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