SELF-OSCILLATING POWER ELECTRONIC STABILITY ANALYSIS AND DESIGN

Open Access
Author:
Manuspiya, Suwan
Graduate Program:
Electrical Engineering
Degree:
Doctor of Philosophy
Document Type:
Dissertation
Date of Defense:
November 23, 2004
Committee Members:
  • Heath F Hofmann, Committee Chair
  • Jeffrey Scott Mayer, Committee Member
  • Ruyan Guo, Committee Member
  • Amar S Bhalla, Committee Member
  • Dinesh Kumar Agrawal, Committee Member
  • Kenneth Jenkins, Committee Member
Keywords:
  • second order
  • floquet multiplier
  • self-oscillating
  • stability
Abstract:
In this thesis, a new approach based on time domain analysis is proposed to determine periodic solution and their stability in self-oscillating power electronic circuitry. With the assumption that the circuitry oscillates under feedback control (without an external control signal), the state-space model can be derived for various operating frequencies. Determination of the periodic solution and an assessment of its stability are described. The advantages of the proposed approach over conventional approaches are discussed in great detail. Specific circuit topologies, such as shunt- and series- configurations of second-order systems, are investigated to determine parameters that achieve asymptotic stability, and the presented techniques are validated through simulation. Expressions for Total Harmonic Distortion and normalized power are derived for first-order systems in terms of a singular variable. A design procedure for first-order systems is presented. Finally, the approach is applied to a specific third-order self-oscillating circuit topology and validated through MATLAB and PSPICE simulations.