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Wide-range input efficient direct current-direct current converter

A DC converter, input high-efficiency technology, applied in the direction of DC power input conversion to DC power output, high-efficiency power electronic conversion, output power conversion device, etc., can solve the problems of high switching loss, EMI characteristic deterioration, etc., to achieve switching loss Small size, better EMI performance, and the effect of expanding the application range

Inactive Publication Date: 2015-09-30
苏州舜唐新能源电控设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large RMS current value caused by a narrow duty cycle, high switching loss and the deterioration of EMI characteristics are the main factors that affect the normal application of a single topology under wide-range input conditions.

Method used

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  • Wide-range input efficient direct current-direct current converter

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0029] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

[0030] Such as figure 1 and 2 Shown is an implementation of a wide-range input high-efficiency DC-DC converter according to the present invention, which includes:

[0031] The BOOST interleaved parallel boost circuit 3 is composed of two BOOST circuits, the input and output ends of each BOOST circuit are set in parallel respectively, and the input terminals of the BOOST interleaved parallel boost circuits are connected to a DC power supply. In this embodiment, the first BOOST circuit is composed of the first inductor L1, the first diode D1, the first switch tube S1, the fourth ...

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Abstract

The invention discloses a wide-range input efficient direct current-direct current converter, which comprises a boost interleaved boosted circuit, a resonance half-bridge transformation circuit, a synchronous rectification and filter circuit and a DSP (digital signal processor) digital control circuit, wherein the boost interleaved boosted circuit consists of two boost circuits; the resonance half-bridge transformation circuit consists of two resonance circuits, and input ends of the two resonance circuits are connected in series, and are connected with the output end of the boost interleaved boosted circuit; the synchronous rectification and filter circuit consists of two synchronous rectification networks arranged in parallel, and the input end of each synchronous rectification network is connected with the output end of the corresponding resonance circuit; the DSP digital control circuit is respectively connected with the boost interleaved boosted circuit, the resonance half-bridge transformation circuit and the synchronous rectification and filter circuit. According to the wide-range input efficient direct current-direct current converter disclosed by the invention, the disadvantages of high switching loss and brought EMI (electro-magnetic interference) characteristic worsening of a direct current-direct current converter are solved.

Description

technical field [0001] The invention belongs to the technical field of DC voltage conversion, in particular to a wide-range input high-efficiency DC-DC converter. Background technique [0002] With the further development of the power electronics industry and the further improvement of the requirements for power products, especially the increasing application of high-voltage supercapacitor power batteries today, higher requirements are placed on DC voltage conversion devices. For example, in medium power applications, It is often required that the DC-DC converter can work stably and efficiently within the voltage range of 200V-700V. [0003] At present, under such a wide-range voltage input environment, the common PWM-type converter will have such a wide range of effective duty cycle changes accordingly. Due to the large RMS current value caused by the narrow duty cycle, the high switching loss and the deterioration of the EMI characteristics are the main factors that affec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCY02B70/10
Inventor 米长宝方波
Owner 苏州舜唐新能源电控设备有限公司
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