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

Single-phase nine-level converter

A technology of level converters and converters, applied in the direction of converting AC power input to DC power output, electrical components, output power conversion devices, etc., can solve problems such as reduction, achieve flexible configuration, high reliability, and simple structure Effect

Inactive Publication Date: 2012-11-28
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
View PDF16 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to overcome the shortcomings of the existing single-phase nine-level converter, reduce the DC voltage and DC capacitance, and improve the reliability of the multi-level converter while reducing the harmonic content of the output voltage

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
  • Single-phase nine-level converter
  • Single-phase nine-level converter
  • Single-phase nine-level converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Such as figure 1 As shown, the single-phase nine-level converter of the present invention is composed of a diode-clamped three-level three-phase bridge and two coupled inductors. The diode-clamped three-level three-phase bridge is composed of two DC power supplies, a first bridge arm, a second bridge arm and a third bridge arm. The three bridge arms of the diode-clamped three-level three-phase bridge are composed of twelve fully-controlled power electronic switching devices S 11 -S 14 , S 21 -S 24 , S 31 -S 34 and eighteen diodes D 11 -D 14 、D 21 -D 24 、D 31 -D 34 ,constitute. with S 11 -S 14 Taking the case of IGBT (Insulated Gate Bipolar Transistor) as an example, the connection method between each device is:

[0018] The two DC power supplies E 1 and E 2 It is connected in series, that is, the first DC power supply E...

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 single-phase nine-level converter. The single-phase nine-level converter is composed of a diode clamping type three-level three-phase bridge and two coupling inductances, whereon a center point of one bridge arm of the diode clamping type three-level three-phase bridge is used as one terminal of an output end of the single-phase nine-level converter, the center points of other two bridge arms of the diode clamping type three-level three-phase bridge are respectively connected with two non-public connecting points of the two coupling inductances, a public connecting point of the two coupling inductances are used as the other terminal of the output end of the single-phase nine-level converter, and the two coupling inductances are in sequence connection. The single-phase nine-level converter disclosed by the invention can be used as a converter such as a single-phase inverter and a rectifier, and a three-phase nine-level converter can be formed so as to be applied to a three-phase occasion; and in a high voltage needing occasion, the converter with more levels can be formed through the cascade connection of a nine-level converter.

Description

technical field [0001] The invention relates to a multilevel power electronic converter. Background technique [0002] In order to improve the voltage tolerance level, reduce the harmonic content of the output voltage, and reduce the electromagnetic interference caused by the high dv / dt (voltage rise rate), multi-level power electronic converters have always been obtained It has attracted extensive attention and research, and also produced a large number of practical application devices. Relevant research institutions and R&D enterprises and units at home and abroad have also proposed multi-level converters with various topological structures. [0003] However, almost all current multilevel power electronic converters use multiple DC power supplies to achieve multiple (more than three) levels of output voltage. For example, the traditional cascaded H-bridge multilevel converter needs to use multiple independent DC power supplies; while the diode-clamped multilevel converte...

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 Applications(China)
IPC IPC(8): H02M7/487
Inventor 李子欣李耀华王平
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI