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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