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A Novel Interleaved Parallel Buck Converter and Its Ripple Elimination Method

A ripple elimination and converter technology, applied in the direction of converting DC power input to DC power output, instruments, adjusting electrical variables, etc., can solve the problems of high cost and volume, switching loss, etc., and achieve reduced switching loss, volume and cost. , the effect of improving efficiency

Active Publication Date: 2022-01-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a novel interleaved parallel BUCK converter and its ripple elimination method to solve the problems of traditional interleaved parallel BUCK converter switching loss, cost and high volume

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Embodiment Construction

[0028] 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.

[0029] The object of the present invention is to provide a novel interleaved parallel BUCK converter and its ripple elimination method, which can reduce the switching loss, cost and volume of the interleaved parallel BUCK converter.

[0030] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and spe...

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Abstract

The invention relates to a novel interleaved parallel BUCK converter and a ripple elimination method thereof. The converter includes: 2n+2 IGBTs, n+1 inductors and two capacitors; n is a natural number; two IGBTs and an inductor form a phase bridge arm, and the converter has n+1 phase bridge arms in total; Wherein, the bridge arm of the second phase to the n+1th phase bridge arm are connected in parallel, and the bridge arm after parallel connection is directly connected to the capacitor C P connected in parallel, capacitor C S Inductor L connected in series with the first phase bridge arm S and capacitor C P Between; the first phase bridge arm is used as an output ripple compensation bridge arm, and the second phase bridge arm to the n+1th phase bridge arm are all used as power bridge arms for power transmission. The invention can reduce the switching loss, cost and volume of the interleaved parallel BUCK converter.

Description

technical field [0001] The invention relates to the field of power supply design, in particular to a novel interleaved parallel BUCK converter and a ripple elimination method thereof. Background technique [0002] In some special application scenarios, the converter is required to output direct current with low voltage and high current, and it is also required to have small output ripple and high energy efficiency. The traditional interleaved parallel BUCK converter has been widely used in low-voltage and high-current scenarios due to its unique advantages. The traditional interleaved parallel BUCK converter adopts the phase-shifting and interleaved conduction control method to reduce the output ripple to a certain extent, but if If you want to further reduce the output ripple, you can only increase the switching frequency or increase the inductance and capacitance of the filter. However, the increase of the switching frequency will increase the switching loss of the conver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/158H02M1/14
CPCH02M3/1584H02M1/14
Inventor 韩民晓张理范溢文
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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