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

Three-phase PWM rectifier control method based on deadbeat and triangular wave comparison

A deadbeat control and control method technology, applied in the field of three-phase rectification, can solve the problems of large input current ripple and complex algorithm, and achieve the effect of low input current ripple, simple algorithm and small ripple

Inactive Publication Date: 2016-03-09
SOUTH CHINA UNIV OF TECH
View PDF3 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The commonly used control strategies for three-phase voltage-type PWM rectifiers are: hysteresis comparison control, feedforward decoupling control, current prediction control, dead beat control, but these controls still have shortcomings: simple hysteresis comparison control The input current ripple is still relatively large; feedforward decoupling control, current predictive control, and deadbeat control need to add SVPWM or SPWM links, and the algorithm is complex

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 PWM rectifier control method based on deadbeat and triangular wave comparison
  • Three-phase PWM rectifier control method based on deadbeat and triangular wave comparison
  • Three-phase PWM rectifier control method based on deadbeat and triangular wave comparison

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto. It should be pointed out that, if there are any processes or parameters that are not specifically described in detail below, those skilled in the art can refer to the prior art.

[0024] Such as figure 1 As shown, a schematic diagram of a three-phase PWM rectification control method based on deadbeat and triangular wave comparison of the present invention, the main steps are as follows:

[0025] (S1) Use the phase-locked circuit to obtain the zero-crossing point of the grid A-phase voltage ea, DSP calculates the grid cycle in real time according to the zero-crossing point of the grid A-phase voltage ea, and changes the control cycle accordingly, and calculates according to the zero-crossing point of the grid A-phase voltage ea The voltage values ​​(ea, eb, ec) of the three-ph...

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 three-phase PWM rectifier control method based on deadbeat and triangular wave comparison, which belongs to the field of power electronic conversion technology and intelligent control. The control method of the invention mainly comprises steps of voltage outer loop, deadbeat control and triangular wave comparison control, wherein the voltage outer loop is a PI step; and the deadbeat control is current inner loop control. The control method is simple; and advantages of the triangular wave comparison control and the deadbeat control realize fixed frequency control with an input power factor 1, AC-side input current low harmonic and DC-side voltage stable tracking when switching frequency is low.

Description

technical field [0001] The invention relates to the technical field of three-phase rectification, in particular to a three-phase PWM rectification control method based on deadbeat and triangular wave comparison. Background technique [0002] With the development of my country's economy, the demand for high-power power supply is increasing day by day. The input current harmonics of traditional linear power supply and phase-controlled power supply are large, and the low power factor has a great impact on the power grid; while the three-phase PWM rectifier can eliminate the input current harmonics from the root. Wave, which can realize the unit power factor operation of the AC side, so it is a research hotspot in the field of power electronics. [0003] The commonly used control strategies for three-phase voltage-type PWM rectifiers are: hysteresis comparison control, feedforward decoupling control, current prediction control, dead beat control, but these controls still have sho...

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
IPC IPC(8): H02M1/12H02M7/12
CPCH02M1/12H02M7/12
Inventor 杜贵平柳志飞杜发达
Owner SOUTH CHINA UNIV OF 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