Proceedings ArticleDOI
Stability analysis of a buck regulator employing input filter compensation
S. S. Kelkar,Fred C. Lee +1 more
- pp 38-49
TLDR
In this paper, an exact stability analysis of the buck regulator system is presented and the eigenvalues of the system can be brought back into the unit circle and the sys-tem thus stabilized with the addition of the feedforward loop.Abstract:
The interaction between the input filter and the regulator often causes serious degradation of performance. The reduction in loop gain due to input filter interaction can result in system instability. An exact stability analysis of the buck regulator system is presented. The input filter parameter values are varied and system instability is predicted for the case without feedforward. The eigenvalues of the system can be brought back into the unit circle and the sys tem thus stabilized with the addition of the feedforward loop. Measurements made for the cases with and without feedforward confirm the analytical prediction.read more
Citations
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Journal ArticleDOI
Stability Enhancement via Controller Optimization and Impedance Shaping for Dual Active Bridge-Based Energy Storage Systems
TL;DR: Two impedance compensation methods to enhance the stability of the dual active bridge (DAB) converter-based energy storage systems (ESSs) are proposed, which can solve the instability issue of the DAB-based ESS without any additional passive components or active control loops.
Journal ArticleDOI
Impedance Shaping of Isolated Two-Stage AC-DC-DC Converter for Stability Improvement
TL;DR: The magnitude of the input impedance of the DAB converter is increased to satisfy the Middlebrook criterion without changing its negative resistance characteristics by the proposed control methods.
Proceedings ArticleDOI
A fast time domain digital simulation technique for power converters: Application to a buck converter with feedforward compensation
S. S. Kelkar,Fred C. Lee +1 more
TL;DR: In this article, a large signal nonlinear recurrent time domain model is presented for the converter to analyse the transient response due to a step input change with and without the presence of the proposed feedforward loop.
Journal ArticleDOI
Impedance-Based Stability Analysis of DAB Converters With Single-, Double-, or Cooperative Triple-Phase-Shift Modulations and Input LC Filter
TL;DR: In this article , three typical modulation methods of DAB converters, traditional single-phase shift (SPS), dual-phase-shift (DPS) and the emerging cooperative triple-phaseshift (CTPS) modulation, are studied.
Journal ArticleDOI
Second‐order differential equations for the power converters dynamical performance analysis
Eleonora Amoroso,Gabriele Bonanno,Giuseppina D'Aguì,S. De Caro,S. Foti,Donal O'Regan,Antonio Testa +6 more
TL;DR: In this paper , a second-order differential equation of type Sturm-Liouville with coefficients sign changing is studied, and the existence of one positive solution is obtained by requiring a specific growth of the nonlinearity.
References
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Proceedings ArticleDOI
Generalized computer-aided discrete time domain modeling and analysis of DC-DC converters
TL;DR: A generalized discrete time domain modeling and andlysis technique is presented for all types of switching regulaors using any type of duty-cycle controller, and operat1nq 1n both continuous and discontinuous inductor current.
Journal ArticleDOI
Adaptive Input Filter Compensation for Switching Regulators
S.S. Kelkar,Fred C. Lee +1 more
TL;DR: In this paper, the authors presented an analysis and design procedure aimed at developing a feed-forward loop to cancel the undesirable interaction between an input filter and a switching regulator, which is a function of the input filter parameters and also of the supply voltage.
Proceedings ArticleDOI
A novel input filter compensation scheme for switching regulators
S. S. Kelkar,Fred C. Lee +1 more
TL;DR: In this article, the concept of pole zero cancellation is employed to mitigate some of these detrimental effects and is implemented using a novel feedforward loop, in addition to existing feeback loops of a buck regulator.
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