Bidirectionally isolating type series resonance DC/DC converter

A series resonant and series resonant circuit technology, applied in the output power conversion device, the conversion equipment with intermediate conversion to AC, the conversion of DC power input to DC power output, etc., can solve the problem of small voltage conversion amplitude and increased harmonic hazards. , slow energy storage and other problems, to achieve the effect of large voltage conversion, increased complexity, and improved service life

Inactive Publication Date: 2011-05-18
刘闯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The bidirectional DC / DC converter of this invention is non-isolated, and requires the design of filter units on both sides, which is relatively cumbersome. If the filter design is unreasonable, the two sides will affect each other, increasing the harm of harmonics between the two sides, and the voltage The conversion range is small, and the energy storage units are connected in series, requiring a voltage equalizing circuit, and the energy storage is slow

Method used

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  • Bidirectionally isolating type series resonance DC/DC converter
  • Bidirectionally isolating type series resonance DC/DC converter
  • Bidirectionally isolating type series resonance DC/DC converter

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Embodiment Construction

[0022] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.

[0023] Such as figure 1 As shown, this embodiment includes: primary side voltage stabilizing capacitor 22, primary side high frequency converter 20, primary side series resonant circuit 30, high frequency transformer 28, secondary side series resonant circuit 40, secondary side high frequency converter 50. The secondary-side stabilizing capacitor 32 and the energy storage unit 60, wherein: the capacitors 22 and 32 enh...

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Abstract

The invention relates to a bidirectionally isolating type series resonance DC/DC converter (100) which comprises voltage-stabilizing capacitors (22, 32), high-frequency converters (20, 50), series resonance circuits (30, 40), a high-frequency transformer (28) and an energy storage unit (60), wherein the voltage-stabilizing capacitors (22, 32) are used for enhancing the stability of a DC voltage; the high-frequency converters (20, 50) have the same structure and comprise four switching elements inversely connected in parallel with a rapid diode and can be used for inversion and rectification; the series resonance circuits are used for converting three kinds of discrete levels output by corresponding high-frequency converters into sinusoidal waveforms and can be used for softly switching the switching elements of the corresponding high-frequency converters, at the same time, only one series resonance circuit (30 or 40) acts; and the high-frequency transformer (28) can be used for isolation and transformation. The transformer (100) can be used for greatly converting the DC voltage, has high efficiency, and can be applied to an electric vehicle power supply, standby power supplies of large-scale equipment, and the like.

Description

technical field [0001] The invention relates to a DC / DC converter, in particular to a bidirectional, isolated DC / DC converter based on series resonance soft switching. Background technique [0002] Bidirectional DC / DC converters are widely used in electric vehicles, energy recovery systems for high-power equipment, and backup power supplies for high-power equipment. The energy storage element adopts a supercapacitor or a storage battery, and its charging and discharging are controlled by a bidirectional DC / DC converter. [0003] At present, the topology of bidirectional DC / DC converters is divided into isolated and non-isolated converters. The structure of the isolated converter is relatively complicated. Considering the cost problem, most of them adopt the non-isolated BUCK / BOOST topology. Due to structural limitations, in the prior art, there are mainly two problems in bidirectional DC / DC converters. First, the gain of the BOOST converter is generally low, usually less t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28H02M3/335
CPCY02B70/1491Y02B70/10
Inventor 刘闯赵伊苓
Owner 刘闯
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