Average-Current-Based Conduction Losses Model of Switched Capacitor Converters

Evzelman, Michael; Ben‐Yaakov, S.

doi:10.1109/tpel.2012.2226060

Cited by 144 publications

(58 citation statements)

References 60 publications

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“…It is evident that and (5) In the particular case when , and , where is a unity matrix, the expression (4) is reduced to the Kaczmarz method [6]. If , the SCC operates in the no-charge (NC) mode with maximal efficiency [1,3]. The additional reason why , and consequently, are of our interest, is as follows.…”

Section: Linear Equations In the Theory Of Sccmentioning

confidence: 99%

“…For the SCC where the capacitors are always connected in series the equivalent resistance is a sum [1,3]: (8) where is the topology number, and is the ratio of the average topology current to the average output current . The coefficients are found in [1,3] under the condition that .…”

Section: Derivation Of Equivalent Resistancementioning

confidence: 99%

“…The coefficients are found in [1,3] under the condition that . Transposing the columns of the matrix in (3), we compose the following system: (9) where is the last column in a consistent system associated with .…”

Section: Derivation Of Equivalent Resistancementioning

confidence: 99%

“…The SCC efficiency can be approximated by = and decreases when the converter is loaded. This efficiency drop is mainly due to the conduction losses [1], which are modeled by an equivalent resistance, , as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

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A least squares method applied to multiphase switched capacitor converters

Kushnerov

Yakovlev

2015

2015 European Conference on Circuit Theory and Design (ECCTD)

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The paper proposes a new approach to improve the performance of multiphase switched capacitor converters (SCC). It is based on the use of redundant SCC topologies, which are switched forward and backward. The performance is improved by increasing the efficiency and simultaneous reducing the output current ripple. The SCC is considered as an analog computer that solves the system of linear equations by an iterative method. The SCC output voltage is assumed to be constant. This means that the corresponding system has no solution. It is shown that under this condition, the SCC operating in the no-charge mode solves the system by a least-squares method. This allows finding the average current in each SCC topology and consequently, an analytical expression for the equivalent resistance. The obtained theoretical results agree well with the results of simulations.

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Section: Linear Equations In the Theory Of Sccmentioning

confidence: 99%

Section: Derivation Of Equivalent Resistancementioning

confidence: 99%

Section: Derivation Of Equivalent Resistancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A least squares method applied to multiphase switched capacitor converters

Kushnerov

Yakovlev

2015

2015 European Conference on Circuit Theory and Design (ECCTD)

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“…To integrate different energy sources well and achieve high voltage gain, one possible solution to this problem is the application of the switched-capacitor technique on classical non-isolated dc-dc converters [16][17][18][19][20][21]. Based on it, a parallel switched-diode-capacitor voltage accumulator (SDCVA) composed of several switched-diode-capacitor cells in parallel and a serial SDCVA composed of several switched-diode-capacitor cells in series are proposed in the paper.…”

mentioning

confidence: 99%

Multi-input Step-Up Converters Based on the Switched-Diode-Capacitor Voltage Accumulator

Hou

Chen

Sun

et al. 2016

IEEE Trans. Power Electron.

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This paper introduces the application of a switched-diode-capacitor voltage accumulator (SDCVA) on conventional boost converter. This study aims to obtain two different kinds of multi-input step-up converters with high voltage gains, low component stresses, low ripples, simple control and high conversion efficiencies: one is based on the parallel SDCVA and the other based on the serial SDCVA. The double-input step-up converter based on the parallel SDCVA and the double-input step-up converter based on the serial SDCVA are respectively taken as an example to do theoretical analysis, including operating principles and performance analysises when they work individually and simultaneously. The two proposed converters are implemented with a voltage closed-loop control at the switching frequency of 30kHz. Experimental results obtained from the implemented prototypes are provided to validate the feasibility and effectiveness of the proposed converters. Index Terms: SDCVA, multi-input, hign voltage gain, low component stress, simple control, high efficiency.

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Motivation and Fundamentals

Renz

Wicht

2020

Integrated Hybrid Resonant DCDC Converters

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Average-Current-Based Conduction Losses Model of Switched Capacitor Converters

Cited by 144 publications

References 60 publications

A least squares method applied to multiphase switched capacitor converters

A least squares method applied to multiphase switched capacitor converters

Multi-input Step-Up Converters Based on the Switched-Diode-Capacitor Voltage Accumulator

Motivation and Fundamentals

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