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

Three-phase cascaded converter

A converter and cascading technology, applied in the field of three-phase cascaded converters, can solve problems such as low reliability, and achieve the effects of improving reliability, high switching frequency, and avoiding bridge arm shoot-through.

Active Publication Date: 2017-07-14
BEIJING HYPERSTRONG TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a three-phase cascaded converter to overcome the problem of low reliability caused by bridge wall direct connection in the prior art

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
  • Three-phase cascaded converter
  • Three-phase cascaded converter
  • Three-phase cascaded converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0040] figure 1 This is a schematic structural diagram of a three-phase cascade converter provided in the first embodiment of the present invention. The device of this embodiment may include: three sets of single-phase cascade converters 101,

[0041] Each group of single-phase cascaded converters 101 includes at least two cascaded doub...

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 three-phase cascaded converter, including: three sets of single-phase cascaded converters, and each set of single-phase cascaded converters includes at least two double-buck inverters, each double The step-down inverter includes a first AC terminal and a second AC terminal. The second AC terminal of the upper-stage dual-step-down inverter is connected to the first AC terminal of the adjacent next-stage dual-step-down inverter. The AC terminals are connected, and the first AC terminal of the first-stage double-buck inverter of each of the three sets of single-phase cascaded converters is connected to the AC power supply, and the last stage of the double-buck inverter is connected to the AC power supply. The second AC terminals of the double-buck inverter are connected to each other. Since the double-buck inverter itself has no bridge arm through-through, the danger of bridge arm through-through can be effectively avoided, and the switching frequency can be designed to be very high, effectively improving the three-phase The reliability of the cascaded converter, furthermore, the body diode of the double-buck inverter has no reverse recovery problem, which effectively improves the service life of the three-phase cascaded converter.

Description

Technical field [0001] The invention relates to electric energy conversion technology, in particular to a three-phase cascade converter. Background technique [0002] In recent years, the application of new energy has presented new challenges to the development of power electronics technology, especially in the fields of electric vehicles, wind power generation, etc., for three-phase AC / DC (Alternating Current / Direct Current, referred to as: AC / DC) conversion The performance of the device puts forward higher requirements. Therefore, it is very important to improve the reliability of the three-phase AC / DC converter, optimize the quality of the output waveform, and improve the topology of the converter. [0003] Among a variety of three-phase AC / DC converters, three-phase multilevel converters have been widely used in high-power applications due to their superior performance. The multilevel converter synthesizes multiple levels into a step wave, which is close to the sinusoidal out...

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): H02M7/483H02M7/5387
CPCH02M7/53875H02M7/5388H02M7/5395
Inventor 钱昊张剑辉舒鹏
Owner BEIJING HYPERSTRONG TECH