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

Carrier frequency conversion technology-based space vector modulation method

A space vector modulation and carrier frequency conversion technology, which is applied in the field of power electronics, can solve the problems of asymmetric waveform and high even harmonic components, achieve even harmonic suppression, suppress even harmonic component output, and achieve simple effects

Active Publication Date: 2012-11-21
STATE GRID CORP OF CHINA +3
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the classic SVPWM space vector modulation technology has the disadvantage of high even harmonic components
The reason is that the PWM waveform corresponding to the positive and negative half waves of the modulating wave is asymmetrical

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
  • Carrier frequency conversion technology-based space vector modulation method
  • Carrier frequency conversion technology-based space vector modulation method
  • Carrier frequency conversion technology-based space vector modulation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] The space vector modulation method based on the carrier frequency conversion technology provided in this embodiment has the same vector distribution as the classic SVPWM, and there are 8 kinds of basic vectors, which are divided into 6 sectors, as shown in the attached figure 2 shown. In each carrier period, the target vector is constructed by the basic vector of the sector where it is located, using a 7-segment construction method.

[0028] In the control of the voltage source converter, the target voltage vector rotates with the vector circle. In each control cycle, first determine the sector N where the target vector is located.

[0029] The corresponding basic vector is selected according to the value of sector N, and the calculation of the action time of each basic vector follows the principle of average v...

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 carrier frequency conversion technology-based space vector modulation method. According to the method, during space vector modulating, a transient variable frequency is inserted into a carrier frequency in a given state; and when in short, the carrier frequency is doubled to 2fc or reduced to 2fc / 3. The method provided by the invention can effectively restrain even-order harmonic component output, and has no new requirement on the original design and control of a system. As for a classic SVPWM (Space Vector Pulse Width Modulation) realization method which has the advantage that every time, only one switch acts, the method provided by the invention also has the advantage, and the switch loss is basically the same.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a space vector modulation method based on carrier frequency conversion technology. Background technique [0002] In recent years, with the rapid development of power electronic technology, power electronic devices have been widely used in various fields such as energy saving and emission reduction, new energy and so on. The comprehensive use of non-linear loads such as rectifiers and frequency converters, especially the harmonic pollution caused by high-power frequency conversion devices connected to the grid cannot be ignored. Reducing or eliminating harmonics from the control mechanism is an effective technical way to solve the problem of harmonic pollution. [0003] The voltage source converter is the most commonly used structural form in frequency conversion and current conversion devices. Its basic topology is as follows: figure 1 shown. The control of the conve...

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): H02M7/48
Inventor 周敏胡朝燕瞿兴鸿赵紫龙
Owner STATE GRID CORP OF CHINA
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