A High-Gain Step-Up DC Converter

A DC converter and step-up technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve the problems of low energy conversion efficiency, too many switching devices, large voltage stress of switching tubes and diodes, etc., to achieve voltage stress Reduced, simple circuit topology, small EMI effect

Active Publication Date: 2015-09-30
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention solves the problems of the existing converters such as reduced energy conversion efficiency, too many switching devices, and large voltage stress on the switching tube and diode, and provides a high-gain step-up DC-DC converter

Method used

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  • A High-Gain Step-Up DC Converter
  • A High-Gain Step-Up DC Converter
  • A High-Gain Step-Up DC Converter

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Such as figure 2 As shown, a step-up DC converter with high gain capability is composed of a low-voltage input power supply and a DC / DC boost circuit; the high-gain step-up DC converter includes two inductors L 1 , L 2 , two power switches S 1 , S 2 , two output diodes D 01 、D 02 And three voltage doubler units (composed of 6 diodes and 6 capacitors); the number of voltage doubler units connected should be determined according to the actual application.

[0020] see image 3 , each voltage doubler unit consists of two diodes and two capacitors to form a unit with four ports, the first port is connected to the third port through the first diode, and the first port is connected to the fourth port through the first capacitor; The second port is connected to the fourth port through the second diode, and the second port is c...

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Abstract

The invention provides a high-gain boosting type direct-current converter, comprising two inductors, two power switches, two output diodes and a voltage-multiplying unit, wherein input ends of the first inductor and the second inductor are connected with an anode of an input power supply; output ends of the first inductor and the second inductor are connected with drain electrodes of the first power switch and the second power switch; source electrodes of the first power switch and the second power switch are connected with a cathode of the input power supply; grid electrodes of the two power switches are respectively connected with respective controllers; a phase difference between driving phases of the two power switches is 180 degrees, namely an interleaving control policy is adopted; and one time of basic gain is improved on the basis of the gain of the previous circuit by additionally arranging one voltage-multiplying unit in the circuit. Compared with the existing high-gain boosting type direct-current converter, the high-gain boosting type direct-current converter has the advantages that the circuit topology is simple and the coupling inductance does not exist (EMI (Electro-Magnetic Interference) is small); and voltage stress of a switching element can be greatly reduced and the whole working efficiency of the converter is improved.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a high-gain step-up DC converter. Background technique [0002] In the prior art, the basic step-up (Boost) interleaved parallel converter, see the attached figure 1 (Take two-phase interleaved parallel connection as an example), it includes two inductors, two power switch tubes, and two output diodes. Among them, the input terminal of the first inductor and the input terminal of the second inductor are connected to the positive pole of the input power supply, the output terminal is connected to the anode of the first output diode, and the cathode of the first diode is connected to the cathode of the second diode together. The positive pole of the output terminal of the converter; the drain of the first power switch is connected between the first inductor and the anode of the first diode, and the source of the first power switch is connected to the negative pole of the converter; the output ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/10
Inventor 罗全明邾玢鑫周雒维卢伟国
Owner CHONGQING UNIV
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