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

A cascaded six-switch multilevel inverter

A multi-level inverter and six-switch technology, applied to electrical components, AC power input conversion to DC power output, output power conversion devices, etc., can solve problems such as difficult control of capacitor voltage balance and increase in the number of switching devices , to achieve the effect of reducing the number of switching elements, reducing harmonic content, and optimizing system efficiency

Active Publication Date: 2019-02-12
EAST CHINA JIAOTONG UNIVERSITY
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When it is necessary to achieve a higher voltage level and number of levels, the number of clamping diode devices or clamping capacitor devices required for the diode clamping multilevel inverter and the flying capacitor clamping multilevel inverter will increase sharply, and there is a problem that the capacitor voltage balance control is difficult
The cascaded H-bridge multilevel inverter is easier to achieve a larger number of levels and voltage levels, but as the voltage level increases, the number of cascaded units of the cascaded H-bridge multilevel inverter also decreases. will increase, and the number of switching devices will increase accordingly

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
  • A cascaded six-switch multilevel inverter
  • A cascaded six-switch multilevel inverter
  • A cascaded six-switch multilevel inverter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The specific embodiment of the present invention is as shown in the accompanying drawings.

[0026] figure 1 Shown is a structural schematic diagram of a cascaded six-switch multilevel inverter of the present invention. The inverter is composed of N power units sequentially cascaded; the midpoint of the second bridge arm of the main switch group of the previous power unit is connected with the midpoint of the first bridge arm of the main switch group of the next power unit to form a cascade connection ;The midpoint of the first bridge arm of the main switch group of the first cascaded power unit is the positive output terminal of the inverter, and the midpoint of the second bridge arm of the main switch group of the last cascaded power unit is the inverter negative terminal of the output.

[0027] figure 2 Shown is an implementation of the topology of a cascaded six-switch multilevel inverter power unit. Such as figure 2 As shown, the power unit is composed of a ...

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

A cascaded six-switch multilevel inverter, including a power unit composed of a main switch group and a switched capacitor group, wherein the main switch group is a traditional full-bridge structure, and the switched capacitor group consists of a switched capacitor and two power switches Tube and three uncontrollable diodes, the midpoint of the first bridge arm and the second bridge arm midpoint of the main switch group are the output of the power unit; the inverter is composed of multiple power units cascaded in sequence. In the inverter of the present invention, since each power unit can generate a five-level output voltage, when the output voltage of the same level number is realized, the number of power switching devices is greatly reduced, the complexity of the device is reduced, and the inverter has the advantages of Features of high efficiency and strong reliability.

Description

technical field [0001] The invention relates to a cascaded six-switch multilevel inverter, which belongs to the field of inverter technology. Background technique [0002] Under the prospect of wide application of medium and high voltage large-capacity frequency converters and power active filters, multilevel inverters have become an important research hotspot in the field of power electronics power conversion. It has the following advantages: the total harmonic distortion of the output voltage decreases significantly with the increase of the number of levels; under the condition of outputting the same quality voltage waveform, the switching loss is small and the switching frequency is low; compared with the two-level converter , at the phase voltage level, du / dt is significantly reduced. In the high-voltage and large-capacity motor drive, it can effectively prevent the insulation breakdown of the motor rotor winding and improve the electromagnetic interference characteristi...

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): H02M7/483H02M7/5387H02M1/32
CPCH02M1/32H02M7/483H02M7/5387H02M1/0038H02M1/007H02M7/4835
Inventor 叶满园肖云煌李宋宋平岗
Owner EAST CHINA JIAOTONG UNIVERSITY