Input Voltage Ripple-Based Sensorless Current Sharing Autotuning Controller for Multiphase DC–DC Converters

Huang, Wangxin; Qahouq, Jaber A. Abu

doi:10.1109/tia.2016.2570205

Cited by 24 publications

(10 citation statements)

References 17 publications

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“…Hence, the values of the inductor and capacitor of the output L-C filter can be reduced, thereby reducing the converter size. This means that it is possible to control a wide range of output voltages and satisfy the current ripple rates required by various batteries with different electrical characteristics [21][22][23][24][25][26][27][28]. conditions as a multilevel converter.…”

Section: = × mentioning

confidence: 99%

Improvement of Multilevel DC/DC Converter for E-Mobility Charging Station

2020

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Considerable efforts are being made to reduce CO2 emissions and thereby solve the problems of environmental pollution and global warming. Technologies for environmentally friendly transportation are being developed using batteries. In particular, with the increase in urbanization and one-person households, e-mobility products are drawing increasing attention as short-distance transportation devices. Among these vehicles, personal mobility devices (PMDs) are receiving attention as new transportation devices that are simple to operate. This paper proposes a new multilevel charging system that is advantageous in responding to the charging voltage specifications of various mobile devices with a single charging system while ensuring a low charging current ripple. The proposed diode-parallel multilevel converter consists of an independent Buck converter in series. The switch of the buck converter is configured at the negative terminal of the input power source so that the gate amplifier voltage is used as the power supply voltage; it can therefore be simply configured without a separate gate amplifier power supply. In addition, it is improved so as to have a wider charging voltage range in a low output voltage region and a better efficiency than the existing diode series multilevel converter. To verify the feasibility of the proposed system, simulations were performed using the software PowerSIM(PSIM), and, in order to verify the validity, a prototype charging system was fabricated to compare and analyze losses according to operating conditions.

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Section: = × mentioning

confidence: 99%

Improvement of Multilevel DC/DC Converter for E-Mobility Charging Station

2020

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“…Therefore, some researchers have proposed current sharing methods without current sensors. [29][30][31] These current sharing methods adjust the duty ratios to compensate for the current mismatches based on estimation of the parameter mismatches, like parasitic resistance, the capacitor voltage ripple, and so on. These methods do not require current sensors, and the controls become complex.…”

Section: Introductionmentioning

confidence: 99%

“…However, as the number of phases increases, the number of current sensors required by these methods will increase accordingly, which leads to an increase in cost. Therefore, some researchers have proposed current sharing methods without current sensors 29–31 . These current sharing methods adjust the duty ratios to compensate for the current mismatches based on estimation of the parameter mismatches, like parasitic resistance, the capacitor voltage ripple, and so on.…”

Section: Introductionmentioning

confidence: 99%

Interleaved high conversion ratio DC–DC converter with output self‐balancing and current auto‐sharing for DC nanogrid application

Chen

Feng

Chen

et al. 2022

Circuit Theory & Apps

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In the application of bipolar DC bus configuration in the DC nanogrid, the unbalanced voltage of two outputs in bipolar DC bus, due to the unbalanced conditions of loads and/or energy sources, will cause deterioration of the power quality of the bus and may damage the switch, affecting the stability and safety of the system. In order to solve the problem of unbalanced voltage of two outputs, interleaved series capacitor based dual‐output converter with a high conversion ratio is presented in this paper. By applying negative current mode (NCM) to the main inductor, the character of two‐output self‐balancing and zero voltage switching (ZVS) of all switches for such this topology configuration is achieved. In the NCM mode, the parallel diodes of main switches are not conducted during dead time and guarantee the flowing path to load side. Thus, based on this condition, volt‐second balance of main inductor is obtained to get the character of two‐output self‐balancing. Furthermore, by adopting series capacitor in the proposed topology and based on the charge‐balance of the intermediate block capacitor, inductor current existed in the two phase could be auto‐sharing. Comprehensive operational principle analysis, loss analysis, and efficiency of the proposed converter under different load conditions have been given, and the comparison analysis of three operation modes and selection of negative current mode is clarified. Small signal model of the proposed converter is described to convenient for the controller design. Finally, simulation results and a 20–220 V prototype are built to verify the character analysis of the proposed converter.

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“…The Flyback topology [9][10][11][12] offers the possibility of producing multiple power lines from a single source, but that comes with a cost of using more complex control circuitry to regulate the secondary. The transformer [10][11]is the core of the flyback power source and undoubtedly the handiest aspect.…”

Section: Introductionmentioning

confidence: 99%

“…Once implemented correctly, the transformer can provide the expected functionality while remaining economical. When improperly crafted, it can result in EMI problems, poor efficiency, and probable thermal overstress problems [12][13]. For designing the technology more user friendly and reducing the running cost of receiver side load like electric vehicle (EV), the uni-directional inductive wireless technology is replaced by bidirectional wireless power transfer system, to feed back the energy that store in EV battery pack, to another EVs, grid or home electrical instrument.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Robust High-Density Single-Phase Isolated Buck Converter System For Regulated Power Supply

Sagar

Kumar

Bertoluzzo

2022

2022 3rd International Conference for Emerging Technology (INCET)

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This paper proposes and delivers the performances and results of a simulated prototype of the single-phase isolated buck power converter system by extracting and transmitting the oscillating ripple energy of the primary buck inductor current to the secondary coil. This topology is an alteration on the conventional buck configuration in which the power inductor is changed with a coupled inductor to build an isolated secondary output. On inserting a coupled inductor in place of the power inductor of the buck converter, the secondary coil can deliver the required power due to the time-varying magnetic field developed by the oscillating part of the primary inductive current. Hence it eradicates the requirement of transmitter side in an inductively coupled power transfer technology and results in a DC-DC switching converter, including a primary coil besides the existing typical wired output of the buck converter. This paper addresses the relevant operating principle and offers results for the simulation prototype by using a single-phase isolated buck structure, which attains simultaneous Buck conversion of conventional output and delivers the power to the secondary load as well. Keywords-single-phase isolated buck power converter, regulated power supply, dc-dc converter, switching, charging

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Input Voltage Ripple-Based Sensorless Current Sharing Autotuning Controller for Multiphase DC–DC Converters

Cited by 24 publications

References 17 publications

Improvement of Multilevel DC/DC Converter for E-Mobility Charging Station

Improvement of Multilevel DC/DC Converter for E-Mobility Charging Station

Interleaved high conversion ratio DC–DC converter with output self‐balancing and current auto‐sharing for DC nanogrid application

Design and Analysis of a Robust High-Density Single-Phase Isolated Buck Converter System For Regulated Power Supply

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