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Isolated wide-gain quasi-switch boost DC-DC converter circuit

A quasi-switching step-up, DC-DC technology, applied in the field of power generation, power transformation or power distribution, can solve the problem that the voltage gain of the wide-gain converter needs to be improved

Inactive Publication Date: 2020-10-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the invention of the present invention is to provide an isolated wide-gain quasi-switching step-up DC-DC converter circuit, which realizes the high-gain output of the isolated converter and solves the problem of existing wide-gain conversion. The technical problem that the voltage gain of the device needs to be improved

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  • Isolated wide-gain quasi-switch boost DC-DC converter circuit
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  • Isolated wide-gain quasi-switch boost DC-DC converter circuit

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Embodiment Construction

[0013] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0014] refer to figure 1 , a quasi-switch isolation high-gain DC-DC converter circuit disclosed in the present invention, which includes: a first inductor L 1 , secondary boost network, quasi-switch boost network, transformer T, voltage doubler rectifier, load R L . The secondary boost network consists of the first diode D 1 , the second diode D 2 , the second capacitance C 2 , the second inductance L 2 Composed; quasi-switching boost network consists of the third diode D 3 , the fourth diode D 4 , the first MOS tube S 1 , the second MOS tube S 2 , the third MOS tube S 3 , the fourth MOS tube S 4 and the first capacitor C 1 Formed; the voltage doubler rectifier consists of the first output capacitor C O1 , the second output capacitor C O2 , the first output diode D O1 and the second output diode D O1 Composition; the first inductance...

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Abstract

The invention discloses an isolated wide-gain quasi-switch boost DC-DC converter circuit, and belongs to the technical field of power generation, power transformation or power distribution. The circuit comprises a first-stage boost circuit composed of a first inductor and a secondary boost network, a quasi-switch type second-stage boosting network which consists of a third diode, a fourth diode, four MOS tubes and a first capacitor, a transformer which serves as a third-stage boosting circuit, and a voltage doubling rectifying network which is composed of a first output capacitor, a second output capacitor, a first output diode and a second output diode, wherein the voltage doubling rectifying network serves as a fourth-stage boosting circuit. The whole circuit is high in voltage gain, continuous in input current, continuous in load current and isolated in input and output, and starting impulse current and impulse current at the moment when the MOS tube is turned on do not exist in thecircuit.

Description

technical field [0001] The invention relates to power electronic circuit technology, in particular to an isolated wide-gain quasi-switch boost DC-DC converter circuit suitable for fuel cell power generation and photovoltaic power generation systems, and belongs to the technical field of power generation, power transformation or power distribution. Background technique [0002] In the new energy power generation system, fuel cell power generation and solar photovoltaic power generation have become one of the most widely implemented renewable energy power generation methods today. However, due to the low output voltage level of a single fuel cell and photovoltaic panel, it cannot meet the existing requirements Electrical equipment and grid-connected requirements, so their output voltage must pass through a high-gain step-up DC / DC converter before it can be used. In recent years, relevant scholars have proposed Z-source DC-DC converters and switch boost DC-DC converters. Althou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/36H02M1/32
CPCH02M1/32H02M1/36H02M3/33569Y02E10/56
Inventor 朱小全胡磊金科
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS