Analysis and Design of an Adaptive Multi-Loop Controlled Two Winding Buck/Boost Regulator

1980 IEEE Power Electronics Specialists Conference

Mahmoud

1980

Self Cite

Three basic switching regulators: buck, boost, and buck/boost, employing a multi-loop control module (SCM) were characterized by a common small signal block diagram. Employing the unified model, regulator performances such as stability, audiosusceptibility, output impedance and step load transient are analyzed and key performance indexes are expressed in simple analytical forms. More importantly, the performance characteristics of all three regulators are shown to enjoy common properties due to the unique SCM control scheme which nullifies the positive zero and provides adaptive compensation to the moving poles of the boost and buck/boost converters. This allows a simple unified design procedure to be devised for selecting the key SCM control parameters for an arbitrarily given power stage configuration and parameter values, such that all regulator perfor mance specifications can be met and optimized concurrently in a single design attempt.

“…The following performance improvements were observed.and verified in recent modeling and analysis efforts [4,5,6,7]:…”

Section: ) Constant Tf Variable T Variable Tfsupporting

confidence: 71%

Section: System Modeling and Block Diagram Represen Tationmentioning

confidence: 99%

A unified analysis and design procedure for a standardized control module for dc-dc switching regulators

1980 IEEE Power Electronics Specialists Conference

Mahmoud

1980

Self Cite

“…A standardized implementation scheme of individual building blocks for various control, command, and protection signals is proposed and actual hardware implementation performed successfully on the three converter configurations: buck, buck/boost, and parallel inverters. The following performance improvements were observed and verified in recent modeling and analysis efforts [4][5][6][7]: 1) high-gain, wide-bandwidth, and precision regulation 2) superior dynamic performances such as audiosusceptibility and transient response 3) stabilization effect by shifting the positive zero on the right-half s-plane to the left-half s-plane 4) control adaptive to the output filter parameter variations due to environmental changes in dutycycle modulations and capacitive loading.…”

supporting

confidence: 67%

“…2 was derived for the three SCM regulators [6]. This common circuit model can be employed to examine the following regulator performance categories: Having identified the three basic functional blocks of an SCM-controlled converter as the power stage, the ASP, and the DSP, modeling and analysis of these block were performed [4][5][6][7]. Subsequently, a common frequency domain block diagram as shown in Fig.…”

mentioning

confidence: 99%

Analysis and Design of a Standardized Control Module for Switching Regulators

IEEE Trans. Aerosp. Electron. Syst.

Mahmoud

et al. 1982

Self Cite

Three basic switching regulators: buck, boost, and buck/boost, employing a multiloop standardized control module (SCM) were characterized by a common small signal block diagram. Employing the unified model, regulator performances such as stability, audiosusceptibility, output impedance, and step load transient are analyzed and key performance indexes are expressed in simple analytical forms. More importantly, the performance characteristics of all three regulators are shown to enjoy common properties due to the unique SCM control scheme which nullifies the positive zero and provides adaptive compensation to the moving poles of the boost and buck/boost converters. This allows a simple unified design procedure to be devised for selecting the key SCM control parameters for an arbitrarily given power stage configuration and parameter values, such that all regulator performance specifications can be met and optimized concurrently in a single design attempt.

“…Following the modeling approach similar to that described in the author's previous work [6][7][8][9], the small-signal model of the IEEE converter in Fig. 1 is derived as shown in Fig.…”

mentioning

confidence: 99%

Investigations of Stability&Dynamic Performances of a Current-Injected Regulator

IEEE Trans. Aerosp. Electron. Syst.

Carter

Fang

1983

The stability and dynamic performances of a buck/boost regulator employing a current-injected control are examined. Small-signal models for the power state, the multiloop 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.