A Practical Small Signal Model for the Interleaved Parallel-Series Active Clamp Forward Converter With Peak Current Control

2018 ◽  
Author(s):  
Richard Yang
Keyword(s):  
Current Control ◽  
Small Signal ◽  
Signal Model ◽  
Peak Current ◽  
Forward Converter ◽  
Small Signal Model ◽  
Active Clamp ◽  
Parallel Series

Modeling of high-side active clamp forward converter with resistive parasitics

2020 ◽  
Vol 39 (2) ◽  
pp. 413-430
Author(s):  
Krishnaja Maturi ◽  
Susovon Samanta
Keyword(s):  
Transfer Functions ◽  
Canonical Model ◽  
Small Signal ◽  
Signal Model ◽  
Content Type ◽  
Forward Converter ◽  
Small Signal Model ◽  
High Side ◽  
Computer Aided ◽  
Modeling Software

Purpose The purpose of this paper is to derive the small-signal/canonical model derivation of the high-side active clamp forward converter (ACFC) with diode rectification for ideal and with resistive parasitics. It also covers the analysis of ACFC small-signal model with resistive parasitics using computer-aided modeling software Personal Computer Simulation Program with Integrated Circuit Emphasis (PSPICE) 16.6. The effects of variation of system parameters on the ACFC’s state transfer functions and operations have been highlighted in this paper. Design/methodology/approach The large-signal model and small-signal model of the ACFC with diode rectification has been derived using AC small-signal modeling approach. Findings The operating point of the converter changes with the consideration of resistive parasitics compared with the ideal case. The response obtained from the hardware matches with the time domain response of the averaged model and switch model developed in PSPICE. Research limitations/implications This paper limits the study of ACFC small-signal behavior by using computer-aided design software PSPICE. The dead time of the converter is not considered because it is negligible when compared with the on and off time. The leakage inductance which plays a role in zero voltage switching of the ACFC switches is neglected in the analysis as it is very small compared to the magnetizing inductance. The switching losses are not considered in the modeling. Practical implications The mathematical computation of deriving the system transfer functions from canonical model is complex and time consuming. Originality/value The modeling with resistive parasitics improves the effectiveness of the equivalent model. Also, the analysis with computer-aided modeling software PSPICE gives reliable results in less time.

Model Reduction and Controller Design of a DC-DC Converter

2014 ◽  
Vol 548-549 ◽  
pp. 715-718
Author(s):  
Lin Bing Wang ◽  
Jia Jia Liu ◽  
Hai Fei Chen ◽  
Yue She ◽  
Yang Zhou Wang
Keyword(s):  
Transfer Function ◽  
Model Reduction ◽  
Controller Design ◽  
Small Signal ◽  
Signal Model ◽  
Forward Converter ◽  
Reduced Order ◽  
Small Signal Model ◽  
Proposed Model ◽  
Bode Plots

The reduced-order small-signal model and controller design of a two-transistor forward converter（TTFC）are presented in this paper. First, the small-signal circuit model and transfer function of control to output are found for the TTFC. Then by finding dominant energy poles of the transfer function, the model reductions are performed and the controller design of the converter is simplified. The effective of the proposed model reduction and controller design are demonstrated by bode plots and experimental results.

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