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Direct-current converter

A technology of DC converter and voltage conversion, which is applied in the direction of converting DC power input to DC power output, instruments, and conversion equipment with intermediate conversion to AC, which can solve the problems of reduced efficiency, increased circuit volume and cost, etc.

Inactive Publication Date: 2016-07-13
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a DC converter to solve the problems of reduced efficiency or increased circuit size and cost in the prior art when the DC conversion gain is increased during boost conversion

Method used

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Embodiment Construction

[0050] 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.

[0051] Such as figure 1 As shown, the DC converter described in the embodiment of the present invention includes a voltage dividing unit 11 and a conversion circuit 12, the voltage dividing unit 11 is used to divide the DC voltage Ui provided by the DC voltage source 10, and the voltage dividing The unit includes three terminals, namely: positive DC voltage input terminal In+, negative DC voltage input terminal In- and divided voltage output terminal OUT;

[...

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Abstract

The invention provides a direct-current (DC) converter comprising a voltage division unit and a conversion circuit. The conversion circuit comprises a first switch unit, a second switch unit, an inductor unit, a first one-way conductive unit, and a second one-way conductive unit. The inductor unit comprises a control module and at least two switched inductors. The control module is used for making the at least two switched inductors connected in parallel between a positive-phase conversion voltage output end and a negative-phase conversion voltage output end when the first switch unit and the second switch unit are both switched on, and making the at least two switched inductors connected in series between the positive-phase conversion voltage output end and the negative-phase conversion voltage output end when the first switch unit is switched on and the second switch unit is switched off or when the second switch unit is switched on and the first switch unit is switched off. According to the invention, the requirement of the circuit for the ability to bear the stress at the two ends of a switching device is lowered while the voltage gain is increased, and the problem of efficiency decrease or circuit size and cost increase is not caused.

Description

technical field [0001] The invention relates to the technical field of DC conversion, in particular to a DC converter. Background technique [0002] DC-DC (direct current-direct current) converters with high voltage conversion ratios are widely used in electric vehicles, renewable energy systems, and uninterruptible battery backup systems. Usually, methods to increase the voltage gain of the DC converter include selecting an extreme duty cycle in the traditional DC-DC converter or introducing structural units such as transformers to increase the voltage gain of the circuit. However, when the duty ratio D is greater than 0.9 or the duty ratio D is smaller than 0.1, the efficiency of the DC-DC converter will decrease. In addition, when in a DC-DC converter that does not require isolation, the use of a transformer will greatly increase the size and cost of the circuit. Contents of the invention [0003] The main purpose of the present invention is to provide a DC converter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/1584H02M3/158H02M3/335H02J3/185H02M3/07H02M3/139H02M3/142H02M3/28H02J9/063
Inventor 管恩慧陈硕
Owner BOE TECH GRP CO LTD
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