Isolated double-full-bridge active neutral-point-clamped three-level DC/DC converter

A dual full-bridge, isolated technology, applied in the direction of regulating electrical variables, high-efficiency power electronic conversion, DC power input conversion to DC power output, etc. question

Active Publication Date: 2020-02-21
HUAZHONG UNIV OF SCI & TECH
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the defects of the prior art, the purpose of the present invention is to solve the problem of high voltage level of the prior art switching tube, low switching frequency, difficulty in transformer design, low efficiency, and less freedom of control in powe

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
  • Isolated double-full-bridge active neutral-point-clamped three-level DC/DC converter
  • Isolated double-full-bridge active neutral-point-clamped three-level DC/DC converter
  • Isolated double-full-bridge active neutral-point-clamped three-level DC/DC converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0064] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0065] The technical problem to be solved by the present invention is that the DC bus voltage and switching frequency of the dual active bridge isolated bidirectional DC / DC converter based on the double H bridge are severely limited by device performance.

[0066] The invention provides an isolated double active bridge DC / DC converter composed of double full bridge ANPC. The converter can be ap...

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 an isolated double-full-bridge ANPC three-level DC/DC converter which comprises two full-bridge ANPCs, a transformer and an inductor. Each full-bridge ANPC is composed of two voltage dividing capacitors and two half-bridge ANPCs. The voltage dividing capacitors are connected to Vdc in series, the voltage of each voltage dividing capacitor is Vdc/2, and the half-bridge ANPCsconnect the midpoint of bridge arms of series-connected switching tubes to the series midpoint of the two DC voltage dividing capacitors, so that the voltage stress borne by the switching tube in each half-bridge ANPC is Vdc/2. Each half-bridge ANPC can output three levels, namely, Vdc/2, 0 and -Vdc/2. The output level of each full-bridge ANPC is determined by the difference value of the output levels of the two half-bridge ANPCs, and five levels of Vdc, Vdc/2, 0, -Vdc/2 and -Vdc can be output. The two full-bridge ANPC active bridges can output five levels to enable the voltage at the two ends of the inductor to have nine levels. According to the invention, the AC voltage series is increased, and a higher degree of control freedom is obtained.

Description

technical field [0001] The present invention relates to the field of DC / DC converters, in particular to an isolated double full-bridge active neutral point clamping type (Active Neutral Point Clamped, ANPC) three-level DC / DC converter. Background technique [0002] A DC / DC converter with galvanic isolation and bidirectional power transmission capability can realize power transmission and voltage transformation between grids of different voltage levels. Dual Active Bridge (DAB) DC / DC converter has the advantages of electrical isolation, high power density, bidirectional flow of energy, and easy realization of soft switching. It has been used in the fields of renewable energy and DC power transmission and distribution. It has been extensively researched and applied. [0003] A common DAB topology is a dual H-bridge DAB, where the voltage stress on the switching devices is the DC bus voltage. Since the withstand voltage level of the full-control power device is much lower tha...

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): H02M3/335H02M7/487H02M7/49
CPCH02M3/33523H02M3/33584H02M7/487H02M7/49H02M1/0058Y02B70/10
Inventor 张宇关清心
Owner HUAZHONG UNIV OF SCI & TECH
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap