Unlock instant, AI-driven research and patent intelligence for your innovation.

Reflux Power Suppression of Double Active Bridges Based on Modal Analysis

An analysis method and dual-active technology, applied in the application field of dual-active active bridges, can solve the problems of poor scalability and complex analysis process of the DAB backflow power suppression method, achieve immediate suppression of backflow power, simple analysis method, and simplified analysis process Effect

Active Publication Date: 2019-01-22
HUNAN UNIV
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for suppressing and analyzing the backflow power of dual active active bridges based on modal analysis, so as to solve the complex analysis process of the existing DAB analysis method, and the need for re-analysis and current analysis when DAB works in different working modes. The problem of poor scalability of the DAB backflow power suppression method with SPS control

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
  • Reflux Power Suppression of Double Active Bridges Based on Modal Analysis
  • Reflux Power Suppression of Double Active Bridges Based on Modal Analysis
  • Reflux Power Suppression of Double Active Bridges Based on Modal Analysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] 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.

[0053] The topological circuit of DAB such as figure 1 As shown, it is composed of high-frequency transformer, inductance L (external inductance plus transformer leakage inductance), primary and secondary H-bridge circuits, and capacitors C1 and C2; among them, the transformation ratio of high-frequency transformer is k:1.

[0054] figure 2 Shown are the main waveforms of DAB under SPS control, including switch drive signal, H-bridge DC side voltage u AB an...

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 invention discloses a double active bridge backflow power suppression based on modal analysis, an analysis method, and an analysis of the working process under three working modes in which an inductor current is greater than zero, equal to zero and less than zero at the time of secondary side switching operation in one switching cycle of a DAB controlled by SPS. Then the DAB mode is defined according to the circuit characteristics of each working mode, and the working process of DAB in various working modes is reconstructed based on the DAB mode. Analyze the working process of DAB with multiple modes of modal reconstruction, and analyze the cause of the reflux power; Then, based on the cause of the reflux power, the extended phase-shift control method is adopted to change the duty cycle of phase-shift and the timing of the driving signal of DAB primary switch, and the reflux power is reduced by adding the freewheeling mode similar to that of the basic DC / DC converter through the diode freewheeling mode during the DAB mode evolution. Finally, the reflux power after DAB suppression is analyzed, and the control parameters to reduce the reflux power are determined.

Description

technical field [0001] The invention belongs to the technical field of application of dual active active bridges, and in particular relates to a method for suppressing and analyzing backflow power of dual active active bridges based on modal analysis. Background technique [0002] Dual Active Bridge (DAB) has the advantages of bidirectional flow of energy, electrical isolation of input and output, high power density, and easy realization of soft switching. It is a very promising DC converter topology for research and application. The improved multi-phase-shift control strategy based on single-phase-shift control brings complex working mode and work analysis process to DAB, and lacks the circuit mechanism of backflow power generation and suppression. A DAB analysis method with simple analysis process and flexible application is needed . [0003] At present, the control strategies adopted by DAB are improved based on the traditional single phase shift control (single phase sh...

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
IPC IPC(8): H02M3/335
CPCH02M3/33584H02M1/0038
Inventor 涂春鸣肖凡帅智康管亮葛钦葛平娟
Owner HUNAN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com