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A dcdc converter

A technology of converters and transformers, applied in the field of converters, can solve problems such as difficulty in adapting to the range of input and output voltages

Active Publication Date: 2017-02-22
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a DC-DC converter to solve the problem that the existing technology is difficult to adapt to the wide range of input and output voltages

Method used

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047] The invention provides a DC-DC converter to solve the problem that the prior art is difficult to adapt to a wide range of input and output voltages.

[0048] Specifically, such as figure 2 As shown, the transformer of the DCDC converter includes: a first output winding 101 and a second output winding 102; the DCDC converter includes: a first rectifier circuit 201 connected to the first output winding 101, and a second output winding The second rectifi...

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Abstract

The invention provides a DCDC converter. The DCDC converter comprises two output windings and two rectifying circuits, wherein output ends of the two rectifying circuits are connected in series. Compared with the prior art, one output winding and one rectifying circuit are additionally arranged, so that the step-up ratio of the DCDC converter is adjusted on the basis that voltage and current stress of a device connected with a primary side winding of a transformer in the DCDC converter are not changed, and the property of the DCDC converter is not influenced; the winding turn ratio of the transformer is designed and fixed-frequency modulation is carried out so that the output voltage is in an acceptable range even if an input voltage range is relatively wide; and the problem that the too-wide input / output voltage range is difficult to adapt in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of converters, in particular to a DC-DC converter. Background technique [0002] The resonant converter in the DCDC converter has many advantages, such as low noise, low stress, fewer components and only less switching losses. Such as figure 1 As shown, the resonant converter includes a resonant circuit 101, a high-frequency transformer 102, and a rectifier circuit 103; wherein the resonant circuit 101 can work at a fixed frequency near the resonant frequency, but when the input voltage changes, frequency modulation is required to adapt to this voltage change , as the frequency shifts, the circuit loss will increase and the system efficiency will decrease; in addition, the non-linear characteristics of the frequency conversion control may also mismatch the load characteristics of the circuit, resulting in unstable operation of the circuit. It is difficult for the resonant circuit 101 to adapt to a wide ran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/28
Inventor 刘宝其胡兵薛丽英崔开涌
Owner SUNGROW POWER SUPPLY CO LTD