New series half-bridge converters with the balance input split capacitor voltages

Lin, Bor‐Ren; Nian, Yu-Bin; Chiang, Huann‐Keng; Wang, Shang-Lun

doi:10.1109/icit.2014.6894900

Cited by 3 publications

(4 citation statements)

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“…Higher OFF-state voltage withstanding increases stress and cost of the power switches (Imbertson and Mohan, 1993;Arias et al, 2012). In the present paper, for designing SMPS, half bridge converter is chosen in order to reduce the cost and stress of the primary switch (Lin et al, 2016). In half bridge converter topology, OFFstate voltage withstanding capability of MOSFET is only DC input voltage Vi with the bidirectional flux swing.…”

Section: Introductionmentioning

confidence: 99%

Design of symmetrical half-bridge converter with a series coupling capacitor

Rashmi

Jagtap

2020

WJE

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Purpose With the advancement of technology, size, cost, and losses of the switched mode power supply (SMPS) have been decreasing. However, due to the high frequency switching, design of magnetic drives and isolation circuits are becoming a crucial factor in SMPS. This paper presents design criteria, procedure and implementation of AC-DC half bridge (HB) converter with lower cost, smaller size and lower voltage stress on the power switch. Design/Methodology/approach The HB converter is designed in a symmetrical mode with a series coupling capacitor. Isolated power supplies are used for the converter and control circuit. Further, a transformer based isolated gate driver is used to drive both MOSFETs. The control IC works in voltage control mode to regulate voltage by controlling the duty cycle of the MOSFETs. Findings Control characteristics and performance of the HB converter is simulated using the MATLAB software and prototype of 170 W HB converter is built to validate the analytical results under variable load current and source voltage. The power quality and variation of load voltage at 2 A, 5 A, 7 A are reported. Originality/value This paper presents the design of a low-cost HB converter in a symmetrical mode which saves the additional cost of symmetric correction circuit normally required in asymmetrical mode design. This paper also focuses on the selection of primary and secondary side switch, series coupling capacitor, commuting diode, isolated drive and charge equalizer resistor.

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Section: Introductionmentioning

confidence: 99%

Design of symmetrical half-bridge converter with a series coupling capacitor

Rashmi

Jagtap

2020

WJE

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“…However, this method may cause a problem of power imbalance between equivalent modules connected by ISOP. Among representative methods of solving this problem, Reference [3] permits a certain imbalance between ISOP converter modules by permitting an imbalance of DC link voltage which called the auto-balancing method in that patent, and other methods divide the currents by independently controlling DC/DC converters [4][5][6] or Because a rectifier using three-phase power as an input has a large DC link voltage, a DC/DC converter needs to use a power-switching element with a large breakdown voltage and low conduction loss, like an insulated gate bipolar mode transistor (IGBT). However, as IGBT undergoes a drastic increase in switching loss due to the tail current, it is not appropriate for fast switching.…”

Section: Introductionmentioning

confidence: 99%

“…However, this method may cause a problem of power imbalance between equivalent modules connected by ISOP. Among representative methods of solving this problem, Reference [3] permits a certain imbalance between ISOP converter modules by permitting an imbalance of DC link voltage which called the auto-balancing method in that patent, and other methods divide the currents by independently controlling DC/DC converters [4][5][6] or utilizing a coupling inductor [7]. Unfortunately, these methods cannot perfectly solve the fundamental problem of power imbalance, which is attributable to complex circuits or control and the difference among elements.…”

Section: Introductionmentioning

confidence: 99%

“…This study proposes a new In this way, the efficiency was improved and the volume was minimized. Moreover, to solve the problem of miniaturization, converters with the same module were connected by input serial and output parallel (ISOP) topology [3][4][5][6][7][8][9]. However, this method may cause a problem of power imbalance between equivalent modules connected by ISOP.…”

Section: Introductionmentioning

confidence: 99%

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Power Balance Method using Coupled Shunt Inductor and Multiple-Input Transformer for ISOP LLC Converter

Hwang¹,

Baek

Kim

2019

Electronics

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High-capacity power-supply systems using a large input voltage typically improve efficiency and can be miniaturized by dividing the input voltage into multiple small voltages, thereby minimizing the stress on the switching element and thus materializing a fast switching function. When a large input voltage is divided into small voltages in series through a DC link capacitor, power is supplied to each converter and the power of each LLC (Inductor-Inductor-Capacitor) converter can be divided and converted. However, such LLC converters, which are configured by the division of the input voltage, have power imbalance due to the parameter variation between active and passive elements of the power board, which results in an increase in the stress and heat of a particular element. As this problem of power balance necessitates a design for securing a power margin and as the heated element increases its volume, the efficiency and reliability of the LLC converter are degenerated. Accordingly, this study attempted to solve the problem of the power imbalance of LLC converters at each level using a coupled shunt inductor and multiple-input transformers sharing magnetic coupling.

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