A buck high-frequency isolated five-level inverter

A high-frequency isolation, five-level technology, used in electrical components, AC power input to DC power output, output power conversion devices, etc. problem, to achieve the effect of good voltage spectrum characteristics, miniaturization and widening of the application range

Inactive Publication Date: 2016-03-23
NANJING UNIV OF SCI & TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It only reduces the voltage stress of the switch tube in the DC / DC converter with high-frequency electrical isolation, but does not really realize multi-level at the front end of the output filter inductor, and does not reduce the voltage stress of the switch tube. The output filter inductor capacitance value have not been reduced

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 buck high-frequency isolated five-level inverter
  • A buck high-frequency isolated five-level inverter
  • A buck high-frequency isolated five-level inverter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

[0022] Such as figure 1 As shown, according to a preferred embodiment of the present invention, a Buck high-frequency isolated five-level inverter is composed of an input DC power supply unit 1, a voltage dividing capacitor 2, and a Buck high-frequency isolated five-level converter connected in sequence Unit 3, high-frequency isolation transformer 4, cycloconverter 5, output filter 6 and output AC load 7; wherein, the input DC power supply unit 1 includes an input DC power supply Ui, one end of the input DC power supply Ui and the voltage dividing capacitor 2 connection, the other end of the voltage dividing capacitor 2 is connected to one end of the Buck high-frequency isolated five-level conversion unit 3, the other end of the Buck high-frequency isolated five-level conversion unit 3 is connected...

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 provides a high-frequency isolation type five-level inverter which is composed of an input direct-current power source, a partial pressure capacitor, a Buck high-frequency isolation five-level conversion unit, a high-frequency isolation transformer, a cycle converter, an output filter and an output alternating-current load. The positive electrode and the negative electrode of the input direct-current power source are connected with the positive electrode and the negative electrode of the partial pressure capacitor respectively. The positive electrode of the partial pressure capacitor is connected with the positive electrode of the Buck high-frequency isolation five-level conversion unit, the negative electrode of an input capacitor is connected with the negative electrode of the Buck high-frequency isolation five-level conversion unit, and the output end of the Buck high-frequency isolation five-level conversion unit is connected with a primary winding of the high-frequency isolation transformer. A secondary winding of the high-frequency isolation transformer is connected with the input end of the cycle converter. The output end of the cycle converter is connected with the input end of the output filter. The output end of the output filter is connected with the output alternating-current load. According to the high-frequency isolation type five-level inverter, the voltage stress of an inverter switching tube can be remarkably reduced, and high-frequency electric isolation is achieved between the alternating-current load and the direct-current power source.

Description

technical field [0001] The invention belongs to the technical field of power electronic conversion, in particular to a Buck high-frequency isolated five-level inverter. Background technique [0002] Direct-to-AC DC-AC conversion technology is a conversion technology that uses power semiconductor devices to convert DC power into constant-voltage and constant-frequency AC power, referred to as inverter technology. It is widely used in national defense, industrial and mining enterprises, scientific research institutes, university laboratories and daily life. With the development and application of new energy technology, the application of inverter technology in new energy is also increasing. [0003] Conventional inverter technology usually adds a first-class power frequency transformer between the inverter and the output to adjust the voltage ratio and serve as electrical isolation, but the power frequency transformer has the characteristics of large volume, audio noise, poor...

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): H02M7/483
Inventor 李磊柳成赵卫胥佳梅项泽宇毕婕
Owner NANJING 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