Modeling and practical design issues for average current control

Sun, Jian; Bass, R.M.

doi:10.1109/apec.1999.750488

Cited by 105 publications

(76 citation statements)

References 4 publications

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“…If the condition R c C ≪ T is not met, (28) will be more accurate than (30). Both (28) and (30) determined by (5), or by the steady-state equation,…”

Section: Proportional Voltage Mode Control (Pvmc)mentioning

confidence: 99%

Instability conditions for a class of switched linear systems with switching delays based on sampled-data analysis: applications to DC–DC converters

Fang

2014

Nonlinear Dyn

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Design-oriented boundary conditions for subharmonic oscillations are of great interest recently. Based on a subharmonic oscillation boundary condition reported in a PhD thesis more than a decade ago, extended new boundary conditions are derived in closed forms for general switching DC-DC converters. Sampled-data and harmonic balance analyses are applied and generate equivalent results. It is shown that the equivalent series resistance causes the boundary conditions for voltage/current mode control to have similar forms. Some recently reported boundary conditions become special cases in view of the general boundary conditions derived. New Nyquist-like designoriented plots are proposed to predict or prevent the occurrence of the subharmonic oscillation. The relation between the crossover frequency and the subharmonic oscillation is also analyzed.

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“…If the condition R c C ≪ T is not met, (28) will be more accurate than (30). Both (28) and (30) determined by (5), or by the steady-state equation,…”

Section: Proportional Voltage Mode Control (Pvmc)mentioning

confidence: 99%

Instability conditions for a class of switched linear systems with switching delays based on sampled-data analysis: applications to DC–DC converters

Fang

2014

Nonlinear Dyn

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“…Research into switching circuit modeling techniques was also developed through the 1990s as well [18]- [20]. Other research into switching systems simulation was investigated, but found most of its applications in the digital domain [21].…”

Section: A Circuit Analysis and Modelingmentioning

confidence: 99%

Emerging Trends in Silicon Carbide Power Electronics Design

Mantooth¹

2017

CPSS TPEA

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Abstract-The emergence of wide bandgap power semiconductor devices has opened the possibilities of improved electrical performance and power density. Advanced research into wide bandgap power electronics also includes advances in integrated circuit design, semiconductor device modeling, 3D electronic packaging, and computer-aided design of wide bandgap based electronics. These emerging trends are described along with some early results indicating the additional improvements possible in power density. Operation at extreme temperatures also becomes more feasible.Index Terms-Gallium nitride, power integrated circuits, power semiconductor devices, power electronics, silicon carbide, wide bandgap semiconductors.

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“…At low duty ratios, for example, D .-::: 0.15, the crossover frequency ie ::;:, is, which violates the Nyquist sampling theorem. Moreover, in [J] and [2], it was shown that a high-frequency pole due to the error amplifier located at is eliminates the switching frequency component in the sensed current. This pole only guarantees the optimal slope condition; however, it does not contribute to an accurate average current sensing.…”

Section: Introductionmentioning

confidence: 99%

“…However, adding a filter pole before the power stage, e.g. , in the control circuit [1], [2], [7], does not reduce the ripple. Consequently, the transistor is triggered ON at the peak inductor current instead of the average inductor current.…”

Section: Introductionmentioning

confidence: 99%

“…The existing average current-mode control techniques have been discussed in great detail in [J] and [2]. In [J], the current error amplifier was designed for an optimum proportional gain at the point, where the down-slope of the inductor current and the up-slope of the sawtooth voltage waveform applied to the pulse-width modulator are equal.…”

Section: Introductionmentioning

confidence: 99%

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Average current-mode control of buck dc-dc converter with reduced control voltage ripple

Saini

Reatti

Kazimierczuk

2016

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society

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Abstract-This paper proposes a technique to track and reg ulate the "true average" current in any branch of a pulse-width modulated dc-dc power converter. An example buck converter in continuous-conduction mode is considered. A comprehensive characterization is presented for the proposed scheme. An over all dc and small-signal analysis of the inner current loop is performed. The current average current-mode control methods suffer from switching instability at low duty ratios due to a large ripple in the sensed current. Moreover, the current error amplifier's high-frequency pole located at the switching frequency neither alleviates the stability issue nor improves the dynamic response of the converter. In the proposed approach, a low pass filter, which attenuates any high-frequency ripple is placed in the feedback path of the current loop. Consequently, the control voltage is nearly dc and proportional to the actual average value of the inductor current. The inner current loop gain transfer function of the presented circuit has been derived.

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Modeling and practical design issues for average current control

Cited by 105 publications

References 4 publications

Instability conditions for a class of switched linear systems with switching delays based on sampled-data analysis: applications to DC–DC converters

Instability conditions for a class of switched linear systems with switching delays based on sampled-data analysis: applications to DC–DC converters

Emerging Trends in Silicon Carbide Power Electronics Design

Average current-mode control of buck dc-dc converter with reduced control voltage ripple

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