Dynamical Characterization of Peak-Current-Mode-Controlled Buck Converter With Output-Current Feedforward

Karppanen, M.; Hankaniemi, M.; Suntio, Teuvo; Sippola, M.

doi:10.1109/tpel.2006.889921

Cited by 60 publications

(35 citation statements)

References 21 publications

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“…15 meaning that the load impedance does not affect the input impedance as demonstrated in [30] and discussed earlier in Section III.…”

Section: Pcm-controlled Convertersmentioning

confidence: 95%

“…The dynamic models for the PCM-OCF-controlled converter can be derived based on the PCM-controlled converter models as instructed in detail in [30]. When the gain of the outputcurrent-feedforward loop is taken as unity and the equivalent current-sensing resistor (i?…”

Section: Pcm-ocf-controlled Buck Convertermentioning

confidence: 99%

“…si ) are equal, the set of open-loop transfer functions can be given by (35). The accuracy of the analytic models in (35) as shown at the bottom of the page, is validated in [30]. The detailed description of the control design and the controller parameters can be found from [30].…”

Section: Pcm-ocf-controlled Buck Convertermentioning

confidence: 99%

“…Based on their explicit forms, the differences in the interaction sensitivity of a buck converter under DDR, IVFF, peak-current mode (PCM), and PCM with output-current feedforward (OCF) control arrangements are explicitly explained. These converters are introduced previously in more detail from the dynamic and design point of view in [13], [16], [17], [21], [25], [30], and [31] including the verification of their analytic models to the experimentally measured frequency responses. The given analytical models are selected direction of the output current [35] u. T intended to be used to provide explanations for the phenomena demonstrated by means of comprehensive experimental measurements.…”

Section: Introduction Imentioning

confidence: 99%

See 3 more Smart Citations

Effect of Control Method on Impedance-Based Interactions in a Buck Converter

Vesti

Suntio

Oliver

et al. 2013

IEEE Trans. Power Electron.

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Abstract-All the interconnected regulated systems are prone to impedance-based interactions making them sensitive to instability and transient-performance degradation. The applied control method affects significantly the characteristics of the converter in terms of sensitivity to different impedance interactions. This paper provides for the first time the whole set of impedance-type internal parameters and the formulas according to which the interaction sensitivity can be fully explained and analyzed. The formulation given in this paper can be utilized equally either based on measured frequency responses or on predicted analytic transfer functions. Usually, the distributed dc-dc systems are constructed by using ready-made power modules without having thorough knowledge on the actual power-stage and control-system designs. As a consequence, the interaction characterization has to be based on the frequency responses measureable via the input and output terminals. A buck converter with four different control methods is experimentally characterized in frequency domain to demonstrate the effect of control method on the interaction sensitivity. The presented analytical models are used to explain the phenomena behind the changes in the interaction sensitivity.Index Terms-Buck converter, dynamic behavior, minor-loop gain, source/load interactions, stability.

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“…15 meaning that the load impedance does not affect the input impedance as demonstrated in [30] and discussed earlier in Section III.…”

Section: Pcm-controlled Convertersmentioning

confidence: 95%

Section: Pcm-ocf-controlled Buck Convertermentioning

confidence: 99%

Section: Pcm-ocf-controlled Buck Convertermentioning

confidence: 99%

Section: Introduction Imentioning

confidence: 99%

See 2 more Smart Citations

Effect of Control Method on Impedance-Based Interactions in a Buck Converter

Vesti

Suntio

Oliver

et al. 2013

IEEE Trans. Power Electron.

Self Cite

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show abstract

“…The closed-loop output impedances of the sources Z v can be represented by using impedance calculated in Equations (5) and (14), the closed-loop input admittances of the CPLs Y c can be represented by using admittance calculated in Equations (5) and (10), and the network nodal admittance matrix Y sys can be represented by using admittance calculated in Equation (2). Then, the the stability of the meshed DC DPS can be analyzed with the stability criterion T m expressed in Equation (8).…”

Section: Stability Analysismentioning

confidence: 99%

Stability Analysis and Stability Enhancement Based on Virtual Harmonic Resistance for Meshed DC Distributed Power Systems with Constant Power Loads

Wang

Peng

et al. 2017

Energies

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This paper addresses the stability issue of the meshed DC distributed power systems (DPS) with constant power loads (CPLs) and proposes a stability enhancement method based on virtual harmonic resistance. In previous researches, the network dynamics of the meshed DC DPS are often ignored, which affects the derivation of the equivalent system impendence. In addition, few of them have considered the meshed DC DPS including multiple sources with voltage-controlled converters and CPLs. To tackle the aforementioned challenge, this paper mainly makes the following efforts. The component connection method (CCM) is employed and expanded to derive the stability criterion of the meshed DC DPS with CPLs. This stability criterion can be simplified to relate only with the network node admittance matrix, the output impendences of the sources, and the input admittances of the CPLs. A virtual harmonic resistance through the second-order generalized integrator (SOGI) is added in the source with the voltage-controlled converter to lower the peak of the source output impendence, which can enhance the stability of the meshed DC DPS. The effectiveness of the proposed stability criterion and stability enhancement method are verified by nonlinear dynamic simulations.

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Introduction

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Dynamic Profile of Switched‐Mode Converter

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Dynamical Characterization of Peak-Current-Mode-Controlled Buck Converter With Output-Current Feedforward

Cited by 60 publications

References 21 publications

Effect of Control Method on Impedance-Based Interactions in a Buck Converter

Effect of Control Method on Impedance-Based Interactions in a Buck Converter

Stability Analysis and Stability Enhancement Based on Virtual Harmonic Resistance for Meshed DC Distributed Power Systems with Constant Power Loads

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