High-efficiency converter with high boost capability

A high-efficiency, high-boost technology, applied in high-efficiency power electronic conversion, conversion of DC power input to DC power output, and output power conversion devices, etc., can solve the problem that the system efficiency is difficult to further improve, the structural complexity and cost are not obvious Improvement and other issues to achieve the effect of reducing system loss and cost and improving efficiency

Active Publication Date: 2020-10-16
NANTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the converter contains two switching tubes and four diodes, and the structure complexity and cost have not been significantly improved; and two diodes are in a hard switching state, and the system efficiency is difficult to further improve

Method used

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  • High-efficiency converter with high boost capability
  • High-efficiency converter with high boost capability
  • High-efficiency converter with high boost capability

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.

[0030] see figure 1 , the embodiment of the present application provides a high-efficiency converter with high boost capability, including a DC voltage source U in , the first switch tube S 1 , the second switch tube S 2 , Diode D 1 , the first inductance L 1 , the second inductance L 2 , the first capacitance C 1 , the second capacitance C 2 , the third capacitor C 3 and load R, where:

[0031] DC power supply U in The positive pol...

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Abstract

The invention belongs to the technical field of DC-DC converters, and discloses a high-efficiency converter with high boost capability, which is composed of two switching tubes, a diode, two inductorsand three capacitors. The two switching tubes in the converter are in complementary conduction. The converter provided by the invention has low voltage stress and current stress of the power tube andthe filter element, so that the system loss and the cost are reduced; meanwhile, natural turn-off of ZVSs and diodes of all switching tubes is realized, and the efficiency of the system is further improved. In addition, the voltage gain of the converter is G=(1 + D) / (1-D), the duty ratio interval is [0, 1], the converter can be adjusted in a wide range, and the converter is particularly suitablefor occasions with medium voltage gain requirements (G is smaller than or equal to 9).

Description

technical field [0001] The invention relates to the technical field of DC-DC converters, in particular to a high-efficiency converter with high boosting capability. Background technique [0002] Boost converter is the most widely used boost converter, and its voltage gain can reach infinity under ideal conditions. However, due to the limitations of the boost inductor and parasitic resistance in the power device, the actual boost capability of the Boost converter is very limited. Moreover, even if a voltage increase of more than 8 times can be achieved, the duty cycle of the switch tube needs to be increased to the extreme, resulting in a sharp drop in conversion efficiency. [0003] In order to obtain higher conversion efficiency while increasing the voltage gain, scholars from various countries have proposed many high-gain converter topologies, which can be roughly divided into two types: transformer (including coupled inductor) and transformerless. Compared with the form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/158H02M1/0058Y02B70/10
Inventor 秦岭田民周磊沈家鹏高娟段冰莹许兴钱天泓马宇昂
Owner NANTONG UNIVERSITY
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