Ultra-Wide Output Voltage Range Power Supply Based on Modular Switched-Converter Principle

Lu, Yu; Wu, Hongfei; Tang, Bo; Li, Mengxi; Xia, Yuzheng; Xing, Yan

doi:10.1109/tpel.2019.2912724

Cited by 14 publications

(10 citation statements)

References 18 publications

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“…Similarly, the proposals [1]- [3], [17]- [19] report stable performance over the extended range of the output voltage, however, the input voltage remains fixed. The most common approach for the extended range of voltage gain is a frequency modulated LLC power converter.…”

Section: Introductionmentioning

confidence: 94%

“…In mode-4, a series-connected pair of output filter inductors appears in parallel to the load. The primary current can be determined either by (1) or (3) and by considering the total value of the output filter inductance in this mode.…”

Section: A Operation Of Mode-4mentioning

confidence: 99%

“…Photovoltaic/server station applications need wide input range converters at a fixed output voltage, whereas battery/supercapacitor charging applications need wide output range converters at a fixed input voltage. An extensive work [1]- [8] is progressing in the power electronics industry to meet the requirements to some extent. The focus has been on either extending the range of input voltage or extending the range of output voltage.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A 2×3 Reconfigurable Modes Wide Input Wide Output Range DC-DC Power Converter

Bakar

Alam

Wardemark³

et al. 2021

IEEE Access

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There is an increasing demand for efficient and low-profile power converters in almost all industrial applications. Some require stable performance over a wide range of input voltages, whereas others require converters with a stable performance over a wide range of output voltages. In this regard, little work has been done to combine both requirements into one solution. This work suggests a unique solution that addresses both requirements at once. A power converter with 2x3 reconfigurable modes has been presented, able to operate with DC gains of 1, 2 and 4, which can be further extended to 8. The converter shows stable performance for the extended range of both input and output voltage. The flexible reconfigurable feature of the proposal can be applied in a variety of applications. Two reconfigurable modes on the input side can be configured following the variation in the line voltage to maintain a stable performance, and three reconfigurable modes for the output voltage, which raises the output voltage from 24V to 48V and 96V. The proposal is applied in an example application of a phase shifted full bridge converter. The converter is characterized for V in = 100-400V dc , P out = 1kW.

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Section: Introductionmentioning

confidence: 94%

Section: A Operation Of Mode-4mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A 2×3 Reconfigurable Modes Wide Input Wide Output Range DC-DC Power Converter

Bakar

Alam

Wardemark³

et al. 2021

IEEE Access

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show abstract

“…However, this full-bridge dc-dc converter cannot generate symmetrical three-level voltages on the secondary side, the modified secondary-side modulated full-bridge dc-dc converters can be shown in Fig. 18(b) [39].…”

Section: B the Unidirectional I 2 Acl Isolated Dc-dc Convertermentioning

confidence: 99%

Unified Fast-Dynamic Direct-Current Control Scheme for Intermediary Inductive AC-Link Isolated DC-DC Converters

Hou

Quan

et al. 2021

IEEE Open J. Power Electron.

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The isolated dc-dc converters with middle inductive AC links dc-dc converter have been extensively studied in modern energy conversion applications for safety and reliability, especially those featuring intermediary inductive ac-link (I 2 ACL) configurations such as full-bridge dc-dc converter and dualactive-bridge (DAB). However, up to now, the dynamic equivalence in these I 2 ACL type converters has not been systematically revealed. To fill such a gap, in this paper, the existing I 2 ACL isolated dc-dc converters are reviewed thoroughly, including unidirectional type and bidirectional type. Then, the general current transferred features of these two groups are analyzed, respectively, and the transferred current during the transient process is just influenced by the middle inductance little. So, the I 2 ACL isolated dc-dc converter can be regarded as the first-order converter. Based on the discovered general characteristic, a unified fast-dynamic direct-current (FDDC) control scheme is proposed for improving the dynamic performance of these I 2 ACL isolated dc-dc converters. Such a scheme can also facilitate the uniform control design for existing or emerging new topologies with the same electrical equivalence. Moreover, the specialized design principles of the PI parameters in the unified FDDC control method are also presented. Finally, to verify the universality and feasibility of the proposed general FDDC control strategy, both simulation and experiment results are presented with demonstration examples, e.g. full-bridge type, DAB-type, and the three-phase DAB type dc-dc converters.

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“…The cascaded two stages decrease the efficiency and increase the cost of the converter. The semi-active rectifier-based isolated buck-boost converters are developed in [18,19]. A three-level full-bridge isolated buck-boost converter is proposed in [20] to increase the output voltage.…”

Section: Introductionmentioning

confidence: 99%

Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability

Wang

Huang

et al. 2021

Applied Sciences

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This paper proposes an isolated buck-boost topology and control strategy for the photovoltaic (PV) medium-voltage DC (MVDC) converter with low-voltage ride through (LVRT) capability. The proposed isolated buck-boost topology operates on either boost or buck mode by only controlling the active semiconductors on the low-voltage side. Based on this topology, medium-voltage (MV) dc–dc module is able to be developed to reduce the number of modules and increase the power density in the converter, which corresponds to the first contribution. As another contribution, a LVRT method based on an LC filter for MVDC converter is proposed without additional circuit and a feedback capacitor current control method for the isolated buck-boost converter is proposed to solve the instability problem caused by the resonance spike of the LC filter. Five kV/50 kW SiC-based dc–dc modules and ±10 kV/200 kW PV MVDC converters were developed. Experiments of the converter for MVDC system in the normal and LVRT conditions are presented. The experimental results verify the effectiveness of the proposed topology and control strategy.

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Ultra-Wide Output Voltage Range Power Supply Based on Modular Switched-Converter Principle

Cited by 14 publications

References 18 publications

A 2×3 Reconfigurable Modes Wide Input Wide Output Range DC-DC Power Converter

A 2×3 Reconfigurable Modes Wide Input Wide Output Range DC-DC Power Converter

Unified Fast-Dynamic Direct-Current Control Scheme for Intermediary Inductive AC-Link Isolated DC-DC Converters

Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability

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