Isolated Boost Bidirectional DC-DC Converter Topology
A DC-DC, topology technology, applied in the direction of converting DC power input to DC power output, instruments, adjusting electrical variables, etc., can solve problems such as inability to integrate, discontinuous input current, and many devices
Active Publication Date: 2022-03-08
TSINGHUA UNIV
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Problems solved by technology
[0003] The isolated boost bidirectional DC-DC converter is generally realized by a Boost converter and a DAB circuit, which has many devices and poor integration
In the traditional isolated step-up bidirectional DC-DC converter, the input side inductance is large and cannot be integrated into the transformer, so the circuit will be bulky
For a single-phase coupled inductance boost converter, the input current is discontinuous during normal operation, so it is not suitable for lithium battery application scenarios that have high requirements on current ripple
In addition, the traditional isolated boost bidirectional DC-DC converter adopts the cascade connection of Boost converter and DAB circuit to achieve a high boost ratio, and the circuit components are many and the circuit is complex
Method used
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[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0023] The following describes the topology of the isolated boost bidirectional DC-DC converter according to the embodiments of the present invention with reference to the accompanying drawings.
[0024] figure 1 It is a structural schematic diagram of an isolated boost bidirectional DC-DC converter topology according to an embodiment of the present invention.
[0025] like figure 1 As shown, the isolated boost bidirectional DC-DC converter topology includes: a front-stage Boost circuit 100 , an integrated transformer 200 and a...
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The invention discloses a topological structure of an isolated step-up bidirectional DC-DC converter, comprising: a front-stage Boost circuit, an integrated transformer and a rear-stage H-bridge circuit, wherein the front-stage Boost circuit includes a first two-phase interleaved and parallel-connected Boost Converter, the integrated transformer is a coupled inductance structure including a Boost inductor part and an ideal transformer structure, the first two-phase interleaved parallel Boost converter is connected in series with the Boost inductor part of the integrated transformer, and the ideal transformer structure of the integrated transformer is connected in series with the subsequent H-bridge circuit . This topology structure uses few components, simple circuit and high integration, which can better solve the problem of discontinuous input current, and greatly suppress the input current ripple and output voltage ripple, making it more demanding for current ripple. Lithium battery application scenarios.
Description
technical field [0001] The invention relates to the technical field of power electronics and electric energy conversion in electrotechnical technology, in particular to a novel topology of an isolated boost bidirectional DC-DC converter. Background technique [0002] With the intensification of energy crisis and global warming, renewable energy sources such as lithium batteries, solar energy, and wind energy have attracted more and more attention. Compared with traditional batteries, lithium batteries have the advantages of long cruising range, repeated use, clean and pollution-free, and high energy density. Isolated boost bidirectional DC-DC converters are widely used in renewable energy fields such as lithium batteries due to the advantages of bidirectional energy flow, high boost ratio, and adjustable ratio. [0003] The isolated boost bidirectional DC-DC converter is generally realized by a Boost converter and a DAB circuit, which has many devices and poor integration. ...
Claims
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IPC IPC(8): H02M3/335
CPCH02M3/33584
Inventor 郑泽东刘基业李驰王哲
Owner TSINGHUA UNIV