Three-phase interleaved Boost integrated bidirectional CLLLC resonant converter and control method thereof

A resonant converter, an integrated technology, used in control/regulation systems, conversion of DC power input to DC power output, instruments, etc., can solve the problem of multi-phase resonant converter energy unable to flow in both directions, limited voltage adjustment range, and input current. Large ripple and other problems, to achieve the effect of natural and smooth switching, increasing the voltage gain range, and reducing the current ripple
CN112701916AInactive Publication Date: 2021-04-23HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2021-04-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a three-phase interleaved Boost integrated bidirectional CLLLC resonant converter and a control method thereof, and belongs to the technical field of power electronic converters. The converter is composed of a primary side circuit, a secondary side circuit, an isolation transformer and a CLLLC type resonance network; and bidirectional energy flow between a primary side power supply and a secondary side power supply can be achieved by controlling the duty ratio of a primary side full-bridge unit switch tube. A non-isolated three-phase interleaved Boost converter and an isolated bidirectional CLLLC resonant converter are integrated, so that switch bridge arm multiplexing is realized, the number of switch tubes is reduced, the loss and the cost are reduced; a symmetrical resonant tank structure ensures consistent resonant network characteristics during forward and reverse operation, and the design difficulty is reduced. The converter and control method thereof of the invention have the advantages of high efficiency, high power density, wide voltage gain, low input current ripple, natural and smooth switching of energy flow direction and the like, and are particularly suitable for the fields of direct-current micro-grids containing energy storage systems, electric vehicles, new energy power generation and the like.
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Description

technical field

[0001] The invention relates to the technical field of power electronic converters in energy storage systems, electric vehicles, and new energy power generation systems, in particular to a three-phase interleaved Boost integrated bidirectional CLLLC resonant converter and a control method thereof. Background technique

[0002] In today's world, the energy problem is becoming more and more serious. The energy shortage and the environmental pollution caused by the use of traditional energy have become major challenges that we have to face. In this context, the development and innovation of related technologies for the application of a large number of renewable distributed energy sources such as wind power and photovoltaics has attracted more and more attention. In order to improve the impact of the unstable output of renewable energy on power quality, it is often necessary to add energy storage units to improve the stability of the system.

[0003] In the powe...

Claims

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