Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Flyback high frequency isolated three-level inverter

A high-frequency isolation, three-level technology, applied in electrical components, AC power input is converted into AC power output, AC power input is converted into DC power output, etc. , can not be applied and other problems, to achieve the effect of good voltage spectrum characteristics, less power conversion stages, and improved efficiency

Inactive Publication Date: 2017-06-27
NANJING UNIV OF SCI & TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they are all two-level inverters. Due to the limitation of topology, the voltage and current stress of the switching tube are relatively large, and the output capacity is small, so they cannot be used in high-voltage and high-power electric energy conversion occasions.

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
  • Flyback high frequency isolated three-level inverter
  • Flyback high frequency isolated three-level inverter
  • Flyback high frequency isolated three-level inverter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The basic working principle of the flyback high-frequency isolated three-level inverter of the present invention is as follows: the inverter can adopt an active-clamp pulse modulation (SPWM) chopping control mode. When the unstable high voltage input DC power supply U to the AC load Z L When transmitting power, the DC input voltage can obtain two levels (+U, +U / 2) after being filtered and divided by the input filter. The high-frequency isolation transformer converts the DC voltage energy into pulsating current energy and stores it in the energy storage type. In the transformer, the cycloconverter demodulates the high-frequency pulsating current at low frequency, obtains low-frequency alternating current after filtering, and supplies power to the load; when the load feeds back energy to the input power supply, the cycloconverter works in the modulation state, and the flyback high-frequency isolation type The three-level transformation unit works in a rectification state....

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 flyback high-frequency isolated three-level inverter. The circuit structure of the inverter is composed of an input DC power supply, an input filter, a high-frequency isolated flyback three-level conversion unit, a cycloconverter, an output filter and an AC load; The function of converting DC voltage into the required stable and high-quality sinusoidal AC voltage. By changing the type of the high-frequency isolated flyback three-level conversion unit and the cycloconverter, a single-tube flyback type, a double-tube flyback type, a half-bridge flyback type, and a full-bridge flyback type can be obtained. Family of circuit topologies for flat inverters. The invention has good characteristics such as simple circuit topology, two-stage conversion of bidirectional power flow, small voltage stress of power switch tube, good voltage spectrum characteristics at the front end of output filter, small size of output filter, strong load adaptability, etc., and is suitable for high voltage input occasions .

Description

technical field [0001] The invention belongs to the technical field of power electronic conversion, in particular to a flyback high-frequency isolated three-level inverter. Background technique [0002] DC-AC conversion technology is a static conversion technology that uses power semiconductor devices to convert DC power into constant-voltage and constant-frequency AC power. It is used for AC loads and is widely used in national defense, industrial and mining enterprises, scientific research institutes, and university experiments. room and daily life. [0003] So far, research on DC-AC converters by power electronics researchers at home and abroad has mainly focused on non-electrically isolated, low-frequency and high-frequency electrically isolated two-level DC-AC converters; for multi-level converters Research mainly focuses on multi-level DC-DC, AC-AC and AC-DC converters, while research on multi-level DC-AC converters is very little, and is limited to non-isolated, low-...

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): H02M7/483H02M5/293
Inventor 项泽宇李磊赵卫胥佳梅柳成
Owner NANJING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com