DC/DC converter based on segmented transformer

A DC-DC, segmented technology, used in output power conversion devices, DC power input conversion to DC power output, instruments, etc., can solve the problems of low conversion efficiency and limited input voltage range, and achieve high work efficiency. , reduce the complexity and keep the output stable

Inactive Publication Date: 2019-07-05
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the defects of the prior art, the purpose of the present invention is to provide a DC-DC converter based on segmented transformers, aiming to solve the problem of limited input voltage range and low conversion efficiency of existing single-stage DC-DC converters. question

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  • DC/DC converter based on segmented transformer
  • DC/DC converter based on segmented transformer
  • DC/DC converter based on segmented transformer

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] The invention provides a DC-DC converter based on a segmented transformer, including: a segmented transformer, a flyback output circuit, a resonant circuit and a filter circuit;

[0038] The segmented transformer includes a primary winding and a segmented secondary winding;

[0039] The primary winding includes a field winding N connected in series P1 and flyback winding N P2 , the field winding N P1 and flyback winding N P2 The winding direction is the same;

[0040] The field winding N P1 After being connected in series with the flyback output circuit, the input power supply is conne...

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PUM

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Abstract

The invention discloses a DC / DC converter based on a segmented transformer. The DC / DC converter comprises a segmented transformer, a flyback output circuit, a resonance circuit and a filter circuit, wherein the segmented transformer comprises a primary winding and a segmented secondary winding; the flyback output circuit is configured to provide a flyback voltage; the flyback voltage and an inputvoltage provided by an input power source are used as the input voltage of a primary-side exciting winding of the segmented transformer; the segmented secondary winding is configured to, according tothe input voltage provided by the input power source, change a transformer ratio, realize a stable output voltage, reduce the complexity of the frequency conversion control in a wide voltage input range, and reduce the voltage stress of a main switching transistor Q; the resonance circuit is configured to implement soft turn-on of a forward diode D2; and the filter circuit is configured to reduceoutput ripple. The DC-DC converter greatly reduces the complexity of the frequency conversion control in a wide input range, breaks through the limitation of the limited frequency modulation, and hashigh work efficiency.

Description

technical field [0001] The invention belongs to the field of switching power supplies, and more specifically relates to a DC-DC converter based on a segmented transformer. Background technique [0002] With the advancement of science and technology, power electronic conversion devices are widely used in communications, data centers, lighting and other fields. However, due to problems such as different standard grid voltages and grid voltage fluctuations in different countries, it is difficult for a single standardized DC-DC converter to meet the needs of different users. Therefore, DC-DC converters with wide-range input are more and more favored by users. In addition, in some special applications, the output of power supply equipment often changes beyond the normal working range, such as tanks, railway locomotives, etc. In order to ensure the normal operation of these equipment, a DC-DC converter that can adapt to a wide range of input changes is necessary. indispensable. ...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/335H02M1/0054H02M1/0083Y02B70/10
Inventor 彭晗刘洋
Owner HUAZHONG UNIV OF SCI & TECH
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