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| Content Provider | IET Digital Library |
|---|---|
| Author | Wu, Hongfei Lu, Yangjun Chen, Liqun Xu, Peng Xiao, Xi Xing, Yan |
| Abstract | A non-isolated bidirectional DC–DC converter (BDC) is proposed for high step-up/step-down bidirectional power conversion applications. A DC-transformer is integrated into a conventional non-isolated buck–boost BDC to achieve high-voltage conversion ratio and wide voltage/power range regulation simultaneously. The switches are shared by the buck–boost BDC and the DC-transformer. Voltage stresses of switches are reduced by connecting the input and output of the DC-transformer in-series. The duty cycles of switches are used to make sure that the voltages on the two sides of the DC-transformer are matched. As a result, the DC-transformer always operates under the highest-efficiency condition. The phase-shift angle between the switching bridges is employed to achieve the power flow regulation. Soft-switching of all the switches is achieved by adopting the pulse-width modulation plus phase-shift control strategy. Operation principles, characteristics and design considerations of the proposed BDC are analysed in detail. Experimental results from a 48 V/400 V–1 kW prototype verify the effectiveness of the proposed converter. The efficiency is demonstrated to peak at 96.6% for both the step-up and step-down modes. |
| Starting Page | 2571 |
| Ending Page | 2579 |
| Page Count | 9 |
| ISSN | 17554535 |
| Volume Number | 9 |
| e-ISSN | 17554543 |
| Issue Number | Issue 13, Oct (2016) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/9/13 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2015.0841 |
| Journal | IET Power Electronics |
| Publisher Date | 2016-10-26 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Bidirectional DC-DC Converter Buck-boost Converter Control of Electric Power System DC Transformers DC-DC Power Converter DC-transformer Design Considerations Energy Storage Energy Storage System High Step-up-step-down Non-isolated BDC High-voltage Conversion Ratio Load Flow Control Operation Principles Phase-shift Angle Power 1 KW Power Conversion Application Power Flow Regulation Power Range Regulation Power Transmission, Distribution And Supply Pulse-width Modulation Plus Phase-shift Control Strategy PWM Power Converter Soft-switching Switching Bridges Switching Converter Transformer And Reactors Voltage 400 V Voltage 48 V Voltage Range Regulation Voltage Stress |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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