A kind of bidirectional dc/dc converter and its modulation method

A modulation method and converter technology, applied in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve the problems of large input and output current ripple, loss of inner tube duty cycle, and reduced power quality and other issues to achieve stable modulation, improve stability, and prevent loss of duty cycle

Active Publication Date: 2022-04-08
SUNGROW POWER SUPPLY CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above single-stage modulation method can operate stably and efficiently under most working conditions. However, if the voltage at both ends of the bidirectional DC / DC converter is the same or the voltage difference is less than a certain value, the modulation will be too large, resulting in the emptying of the inner tube. The ratio is lost, and there is an out-of-control area, which will lead to large input and output current ripples, resulting in lower power quality and system oscillation when multiple machines are running in parallel.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of bidirectional dc/dc converter and its modulation method
  • A kind of bidirectional dc/dc converter and its modulation method
  • A kind of bidirectional dc/dc converter and its modulation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0067] 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.

[0068] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention provides a bidirectional DC / DC converter and a modulation method thereof. According to the detected high-voltage side voltage and low-voltage side voltage of the bidirectional DC / DC converter, the voltage difference on both sides is determined, and the voltage difference on both sides is judged to be at a preset value. After the voltage difference range, the modulation mode of the control bidirectional DC / DC converter is switched from single-level modulation to dual-level modulation; that is, when the voltages at both ends are close to or consistent, dual-level modulation is used instead of single-level modulation to avoid single-level modulation down-regulation The system is too large to prevent the loss of duty cycle, so that the charge and discharge of the inductor can be balanced and the input and output current ripple is small, and the stable modulation of the bidirectional DC / DC converter in the full voltage range can be realized, and the current waveform is improved. quality, and improved system stability.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a bidirectional DC / DC converter and a modulation method thereof. Background technique [0002] The topology of a bidirectional DC / DC converter is as follows figure 1 As shown, in the prior art, single-stage modulation is usually used to control the operation mode of the bidirectional DC / DC converter, that is, chopping control is performed on the high voltage side, the outer tube is turned on and the inner tube is turned off at the low voltage side. When the current flows from the high-voltage side to the low-voltage side, it operates in the buck mode, that is, the step-down mode; when the current flows from the low-voltage side to the high-voltage side, it operates in the boost mode, that is, the boost mode; bidirectional buck-boost free switching. [0003] The above single-stage modulation method can operate stably and efficiently under most working conditions. Howeve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M1/14
CPCH02M3/33584H02M1/14
Inventor 刘亮丁杰申智程林陈方林李海涛
Owner SUNGROW POWER SUPPLY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products