Investigations of stability and dynamic performances of switching regulators employing current-injected controlThe stability and dynamic performances of a buck/boost regulator employing a current-injected control are examined. Small-signal models for the power state, the multi-loop error processor and the duty-cycle pulse-modulator are developed. The error-processor model which incorporates the current-injected loop, the dc loop and the compensation network permits evaluation of the effects of each individual control loop and their combined efforts toward shaping the performance characteristics of the closed-loop system. Comparisons are made between this modeling approach and earlier approaches. Some important yet subtle dissimilarities are discussed. This model predicts the constant-frequency 50 percent duty-cycle instability which is inherent to the current-injected control.
Document ID
19830029784
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Lee, F. C. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Carter, R. A. (Virginia Polytechnic Institute and State University Blacksburg, VA, United States)