Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 36, Issue 3, Pages 3063-3077Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2020.3014505
Keywords
Stability analysis; Voltage control; Switches; Steady-state; ISO; Inductors; Thermal stability; Building block method; input series; open-loop driver; stability; voltage sharing modules (VSM)
Categories
Funding
- Shenzhen Science and Technology Project [JSGG20170824092049631]
- Shenzhen Basic Research Project [JCYJ20190806142612714]
- Guangdong Basic and Applied Basic Research Fund [2019A1515011480]
- Pengcheng Laboratory
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This article introduces a modular method for constructing input-series-connected DC-DC converters, using voltage sharing modules to simplify the complexity of converters while maintaining excellent sharing effects. Additionally, the article analyzes the working principle of the converter, reveals stability constraints of the proposed method, and verifies theoretical analysis results through simulation.
DC/DC converters are connected in series at the input so that low power devices can be used in high-voltage conversion applications. This article proposes a building block method for constructing an input-series-connected dc-dc converter, which combines voltage sharing modules (VSM) with voltage source modules or current source modules. A VSM consists of two MOSFETs, an inductor, and an open-loop driver. The input voltage sharing between the individual modules is achieved by connecting one VSM to the inputs of the two power modules. The proposed method makes the standardized functional modules can be combined together like building blocks, which greatly simplifies the converter complexity and shortens the system development cycle without sacrificing the high dynamic response performance and excellent sharing effect. This article first analyzes the working principle of the converter. Second, the stability constraints of the proposed method are revealed, and the effects of various parameters on the performance are discussed. Furthermore, the theoretical analysis results are verified by simulation. Finally, taking the voltage source module as an example, a prototype is built to test its steady-state and dynamic performance.
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