High efficiency DC/DC converter

A converter, high-efficiency technology, applied in the field of high-efficiency DC/DC converters, can solve the problems of increasing switching loss, prone to breakdown, damage to the switch tube, etc., and achieve the effect of suppressing voltage spikes and avoiding the phenomenon of breakdown

Inactive Publication Date: 2020-06-05
WUHAN UNIV OF TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The switch tube in the DC / DC converter is the core component. Numerous experimental studies have concluded that the switch tube is easily affected by the Miller effect during high-frequency switching, causing gate voltage oscillations and resulting in false turn-on or gate-source breakdown. , and then increase the switching loss, and damage the switching tube in severe cases
[0003] The traditional method is to use the RC snubber circuit, but in the case of high frequency, the oscillation of the switching tube is still serious, not only the loss is large, but also the phenomenon of breakdown is easy to occur

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Embodiment Construction

[0049] 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.

[0050] like figure 1 As shown, the high-efficiency DC / DC converter provided in this embodiment includes: a power conversion circuit, a controller and a buffer circuit;

[0051] The buffer circuit is arranged between the input end and the power conversion circuit;

[0052] The controller is connected to the power conversion circuit;

[0053] The power conversion circuit includes a switching tube Q and an LC oscillating circuit;

[0054] The snubber circuit i...

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Abstract

The invention relates to the field of power conversion of power electronics, in particular to a high-efficiency DC / DC converter which comprises a power conversion circuit, a controller and a buffer circuit. The buffer circuit is arranged between an input end and the power conversion circuit, the controller is connected with the power conversion circuit, the power conversion circuit comprises a switching tube and an LC oscillation circuit, and the buffer circuit is used for slowing down the rising speed of the voltages at the two ends of a source electrode and a drain electrode of the switchingtube. According to the invention, the voltage spike when the switching tube is turned off can be suppressed, thereby avoiding a breakdown phenomenon.

Description

technical field [0001] The invention relates to the field of power electronic power conversion, in particular to a high-efficiency DC / DC converter. Background technique [0002] The switching tube in the DC / DC converter is the core component. Numerous experimental studies have concluded that the switching tube is easily affected by the Miller effect during the high-frequency switching process, which causes gate voltage oscillation and leads to false turn-on or gate-source breakdown. , and then increase the switching loss, and damage the switching tube in severe cases. [0003] The traditional method is to use RC snubber circuit, but in the case of high frequency, the oscillation of the switching tube is still serious, not only the loss is large, but also the phenomenon of breakdown is prone to occur. Contents of the invention [0004] The high-efficiency DC / DC converter provided by the present invention can solve the problems in the prior art, suppress the voltage peak wh...

Claims

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Application Information

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IPC IPC(8): H02M3/156H02M1/34
CPCH02M1/34H02M3/156H02M1/0038H02M1/346Y02B70/10
Inventor 陈启宏吕新奇陈凯风肖刚张立炎周克亮肖朋刘莉
Owner WUHAN UNIV OF TECH
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