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

VIENNA rectifier single-period control method for eliminating triple frequency pulsation

A single-cycle control and rectifier technology, which is applied in the direction of irreversible AC power input conversion to DC power output, output power conversion device, AC power input conversion to DC power output, etc., can solve problems such as difficulty in determining coefficients, and achieve elimination Triple-frequency fluctuations, easy-to-implement, and easy-to-understand effects

Active Publication Date: 2019-09-20
YANGZHOU UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also difficult to determine the coefficient of the above-mentioned third harmonic injection calculation formula load

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
  • VIENNA rectifier single-period control method for eliminating triple frequency pulsation
  • VIENNA rectifier single-period control method for eliminating triple frequency pulsation
  • VIENNA rectifier single-period control method for eliminating triple frequency pulsation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The VIENNA rectifier belongs to the three-level structure, which has the advantages of small output ripple and low voltage when the power device is turned off. Single-cycle control is an important control method for the VIENNA rectifier because of its simplicity and low implementation cost, but this method will The three-fold frequency pulsation of the voltage on the upper and lower capacitors on the DC side occurs, that is, the neutral point potential pulsation; the present invention directly starts from the mathematical model, and obtains the conditions that need to be satisfied to eliminate the neutral point pulsation, and directly calculates the proportion of the neutral point according to this condition. The empty ratio is easier to implement than the conventional method of inserting the third harmonic to eliminate the pulsation. Aiming at the phenomenon that the voltage on the upper and lower capacitors on the DC side will have a DC deviation, a voltage equalization...

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 VIENNA rectifier single-period control method for eliminating triple frequency pulsation, and belongs to the field of electrical engineering. The method comprises the steps that a VIENNA rectifier topology structure introduces a variable as the duty ratio to control the operation of three bi-directional switching tubes in the VIENNA rectifier. The triple frequency fluctuation of the neutral point potential can be completely eliminated, and the problem of the complicated method for injecting the triple harmonic component and difficult determination of parameters can be solved; besides, the DC and AC fluctuation of the midpoint potential can be effectively suppressed so that the output capacitance can be greatly maintained in the voltage-sharing state.

Description

technical field [0001] The invention relates to a VIENNA rectifier, in particular to a VIENNA rectifier control method. Background technique [0002] Traditional uncontrolled rectifiers (diode rectifiers) or phase-controlled rectifiers (thyristor rectifiers) have been widely used in the power electronics industry. And many other problems, serious pollution to the power grid. With the strict restrictions on the current harmonic content in electrical equipment and the demand for converters to work in a wide range of input voltages, VIENNA rectifiers have been widely used. [0003] The VIENNA rectifier is a two-quadrant mid-point clamped three-level PWM rectifier topology. In applications where energy does not need to flow in both directions, VIENNA rectifiers have many advantages. On the one hand, compared with the traditional two-level structure, due to the increase in the number of levels, the harmonic distortion rate (THD) of the current and the voltage stress of the pow...

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 Applications(China)
IPC IPC(8): H02M7/06H02M1/14
CPCH02M1/14H02M7/062
Inventor 李彬史旺旺吴海龙陶君怡
Owner YANGZHOU UNIV
PatSnap Eureka logo

PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.

X (Twitter)LinkedInYouTubeSubstack

© 2026 PatSnap. All rights reserved. 

Terms of Service

 | 

Privacy policy

 | 

Modern Slavery Act Transparency Statement