DC voltage balance control for three-level npc power converters with even-order harmonic elimination scheme

A three-level power supply, power conversion system technology, applied in the output power conversion device, irreversible DC power input to AC power output, electrical components and other directions, can solve problems such as expensive

Inactive Publication Date: 2007-02-28
ROCKWELL AUTOMATION TECH
View PDF0 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this closed-loop neutral balancing approach is expensive, requiring feedback sensing devices and ad

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
  • DC voltage balance control for three-level npc power converters with even-order harmonic elimination scheme
  • DC voltage balance control for three-level npc power converters with even-order harmonic elimination scheme
  • DC voltage balance control for three-level npc power converters with even-order harmonic elimination scheme

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Referring now to the drawings, several embodiments or implementations of the invention are described below in conjunction with the drawings, wherein like numerals are used to refer to like elements throughout. FIG. 1A shows an exemplary three-level inverter power conversion system 100 including a DC connection 100, a three-phase AC connection 120, and three phases including switch banks 130a, 130b, and 130c that commonly couple the DC and AC connections 110 and 120, respectively. stage switch network 130. The conversion system 100 also includes a space vector modulation (SVM) switch control 140 that provides open circuit suppression of even harmonics to effectively balance the neutral 0 of the DC connection 110 in accordance with one or more aspects of the present invention. DC link 110 includes first and second DC terminals 112a and 112b, respectively, for receiving DC power from a power source 114, and first and second capacitors C1 and C2 coupled in series between te...

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

Three-level inverter and rectifier power conversion systems and space vector modulation (SVM) controls having even-order harmonic elimination for neutral voltage balancing with a predefined vector switching sequences for half-wave symmetry in open loop system operation. The vector sequence listings for each SVM diagram segment includes switching state entries individually indicating one of three possible switching state levels positive (P), zero (0), or negative (N) for each of three or more switching groups of the power conversion system, with listings for each pair of first and second diametrically opposite diagram segments include symmetrically opposite switching states, with positive levels in the entries of the listing for the first segment corresponding to negative levels in the entries of the listing for the second segment and vice versa.

Description

[0001] related application [0002] This application requires serial number 60 / 671,714 submitted on April 15, 2005 entitled "DC VoltageBalance Control for Three-Level NPC Inverter with Selective Harmonic EliminationScheme" (using the selected harmonic elimination scheme for three-level NPC inverter Priority and rights to the U.S. Provisional Application for DC Voltage Balance Control), which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to power conversion, and more particularly to controls and methods for pulse width modulated operation of three-level inverter and rectifier type power converters. Background technique [0004] Power converters have been widely used in medium voltage motor drives, and other applications where power needs to be converted from DC to AC or vice versa. Such conversion means are typically referred to as inverters for converting DC to AC, or rectifiers if converting from AC to...

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): H02M7/48H02M7/537H02M7/5387H02M1/14
Inventor W·W·冯B·吴C·刘D·徐
Owner ROCKWELL AUTOMATION 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