Common resonant inductor type wide-input-range LLC resonant converter

A resonant converter and resonant inductor technology, applied in the direction of converting DC power input to DC power output, adjusting electrical variables, and high-efficiency power electronic conversion, etc. The effect of improving the utilization rate, reducing the volume and reducing the cost

Active Publication Date: 2017-05-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The design value of the total input voltage range of the above two schemes is 4 times, whi

Method used

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  • Common resonant inductor type wide-input-range LLC resonant converter
  • Common resonant inductor type wide-input-range LLC resonant converter
  • Common resonant inductor type wide-input-range LLC resonant converter

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Embodiment Construction

[0045] The technical solution of the present invention will be described in detail in conjunction with the accompanying drawings.

[0046] as attached Figure 5 Shown, described a kind of common resonant inductance type wide input range LLC resonant converter is by input source (U in ), primary switch network (10), shared resonant inductance (L r ), the first resonant capacitor (C r1 ), the second resonant capacitor (C r2 ), the first transformer (T 1 ), the second transformer (T 2 ), secondary side rectification circuit (20), output filter capacitor (C o ) and the output load (R o ) form, where the first transformer (T 1 ) The primary side magnetizing inductance value is L m1 , the second transformer (T 2 ) The primary side magnetizing inductance value is L m2 ; The input two ends of the primary side switch network (10) are respectively connected with the input source (U in ) are connected to each other, the output b of the primary switch network (10) is connected ...

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Abstract

The invention discloses a common resonant induction type wide-input-range LLC resonant converter and belongs to the technical field of power electronic converters. The common resonant induction type wide-input-range LLC resonant converter comprises an input source, a primary side switch network, a common resonant inductor, two resonant capacitors, two transformers, a secondary side rectifying circuit, an output filter capacitor and an output load; the input voltage range of the converter is widened by using the dynamically adjustable topological structure. The common resonant induction type wide-input-range LLC resonant converter has a special operating mode, and has voltage gain 0.75 times of that of a traditional full-bridge LLC resonant converter, the input voltage range in the single operating mode can be reduced significantly, resonant cavity parameters are optimized, availability of the transformers is improved, device cost is reduced, the power and power density of the converter are increased, and the demand for high efficiency and high power density in wide input range applications is met.

Description

technical field [0001] The invention relates to a shared resonant inductance type wide input range LLC resonant converter, which belongs to the technical field of power electronic converters, in particular to the technical field of isolated DC-DC power conversion. Background technique [0002] With the increasingly serious problems of environmental pollution and energy shortage, people pay more and more attention to renewable energy. The forms of renewable energy power generation mainly include photovoltaic power generation, wind power generation, hydropower generation and fuel cell power supply, all of which have the characteristics of wide output voltage range. Therefore, in order to efficiently utilize renewable energy and reduce energy waste, a DC / DC converter capable of operating in a wide input voltage range is required. [0003] In recent years, conventional LLC resonant converters have been widely used due to their high efficiency, high power density, and low cost. ...

Claims

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Application Information

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IPC IPC(8): H02M3/338
CPCH02M3/3381H02M3/3385Y02B70/10
Inventor 孙文进邢岩胡海兵吴红飞丁杰曹炀
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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