A Study of Two Control Methods for Full Bridge Converters: Soft Switch Bypass and Current Mode Control
Abstract
In a broad sense, there are now 3 basic categories for high power (above several KW) DC/DC converters: (1) Forced commutation (FC) (2) Resonant (R) (3) Soft switch (SS). Some topologies that are combinations of the above also have been proposed, such as certain pulse width modulation (PWM)-resonant arrangements. The first part of this project was a proposed improvement of the third category, the soft switch. The basic idea of this new converter was to use two additional switches that would bypass the loading during part of the operating cycle if the current decreased below a certain level. The motivation for this was to retain the soft switching characteristic at light loads--a common problem with soft switch converters. Although the bypass circuit proved functional, certain problems were uncovered which raise doubts about its ultimate feasibility. Because of these problems, the research emphasis was shifted from the bypass to an improve current mode control (CMC) converter that promised better results.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1990
- Accession Number
- ADA227136
Entities
People
- Thomas A. Stuart
Organizations
- University of Toledo