Unified Analysis of Switched-Resonator Converters

Jabbari, Masoud

doi:10.1109/tpel.2010.2079954

Cited by 37 publications

(29 citation statements)

References 24 publications

(33 reference statements)

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“…9(a), the circuit can be simplified to a 1:1 conversion cell similar to the SC equivalent. Here, L X , C X , and S1 form a switched series-resonant impedance [15]. R esr and L X lump in the series resistance and inductance in the loops that contain C X and the C bp .…”

Section: Resonant Ladder Convertermentioning

confidence: 99%

Resonant Switched-Capacitor Converters for Sub-module Distributed Photovoltaic Power Management

Stauth

Seeman

Kesarwani

2013

IEEE Trans. Power Electron.

262

111

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This paper discusses the theory and implementation of a class of distributed power converters for photovoltaic (PV) energy optimization. Resonant switched-capacitor converters are configured in parallel with strings of PV cells at the sub-module level to improve energy capture in the event of shading or mismatch. The converters operate in a parallel-ladder architecture, enforcing voltage ratios among strings of cells at terminals normally connected to bypass diodes. The balancing function extends from the sub-module level to the entire series string through a dual-core cable and connector. The parallel configuration allows converters to handle only mismatch power and turn off if there is no mismatch in the array. Measurement results demonstrate insertion loss below 0.1% and effective conversion efficiency above 99% for short-circuit current mismatch gradients up to 40%. The circuit implementation eliminates large power magnetic components, achieving a vertical footprint less than 6 mm. The merits of a resonant topology are compared to a switched-capacitor topology.Index Terms-Maximum power point tracking (MPPT), microinverter, resonant converter, solar energy, switched-capacitor.

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Section: Resonant Ladder Convertermentioning

confidence: 99%

Resonant Switched-Capacitor Converters for Sub-module Distributed Photovoltaic Power Management

Stauth

Seeman

Kesarwani

2013

IEEE Trans. Power Electron.

262

111

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“…A normalized comparison between the required area products for various voltage regulator topologies and operation modes has been carried out and is summarized in The presented GRSCC regulator shares the same switchcount of other step-up/down realizations such as a noninverting buck-boost with comparable efficiency [23]. Nevertheless, specific comparison to step-down regulators implemented with SICs [35]- [40] demonstrates that although having more switches, the overall power density of the GRSCC is reduced considerably. This is accomplished by a …”

Section: Resonant Networkmentioning

confidence: 99%

Resonant Switched-Capacitor Voltage Regulator With Ideal Transient Response

Cervera

Peretz

2015

IEEE Trans. Power Electron.

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A new, small and efficient voltage regulator, realized using a resonant switched capacitor converter technology, is introduced. Voltage regulation is implemented by means of simple digital pulse density modulation. It displays an ideal transient response with a zero-order nature to all disturbance types. The newly developed topology acts as a gyrator with a wide range of voltage conversion ratios (below as well as above unity) with constant efficiency characteristics for the entire operation range. The operation of the voltage regulator is verified on a 20W experimental prototype, demonstrating ideal transient recovery without over/under-shoots in response to load and line transients. Simple design guidelines for the voltage regulation system are provided and verified by experiments. Index Terms-Switch-mode power supplies, switched capacitor converters, voltage regulation, pulse density modulation, digital control, ideal transient recovery I. 0885-8993 (c)

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“…Another approach to regulate the conversion ratio is to introduce an inductive element [8][9][10][11]. Having inductive element allows circulation of the charge within the converter [12][13][14][15][16]. However introduction of inductive element, defeats the whole purpose of miniaturisation, since inductors integration still poses a challenge in the IC production.…”

Section: Introductionmentioning

confidence: 99%

Modelling, simulation and experimental investigation of a new two input, series‐parallel switched capacitor converter

Abraham

Jose

Mathew

et al. 2017

IET Power Electronics

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A new series-parallel switched capacitor converter topology capable of operating off two independent input sources and generating target output voltage in buck or boost mode is presented. Operation principle, conversion ratios, modelling considerations in different operation modes and extensive loss analysis are derived. The converter is robust and may be operated off one or two input sources, having the ability to change conversion ratio over a wide range. The proposed model assumes that the conduction losses are proportional to the average current flowing through each of the charge pump capacitor in a switching phase. Capacitor current instantaneous waveform in the complete charge, partial charge and no charge modes are captured in simulation and experiment. Model predicted equivalent resistance, output voltage and instantaneous capacitor current waveform concur excellent with simulated and experimental values, rendering the new converter as an excellent candidate for two and single input source applications.

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Unified Analysis of Switched-Resonator Converters

Cited by 37 publications

References 24 publications

Resonant Switched-Capacitor Converters for Sub-module Distributed Photovoltaic Power Management

Resonant Switched-Capacitor Converters for Sub-module Distributed Photovoltaic Power Management

Resonant Switched-Capacitor Voltage Regulator With Ideal Transient Response

Modelling, simulation and experimental investigation of a new two input, series‐parallel switched capacitor converter

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