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

Design scheme of three-phase to nine-phase step-up step-down auto-coupling phase-shifting transformer

A technology of phase-shifting transformers and autotransformers, which is applied in the direction of transformers, fixed transformers, and parts of transformers/inductors. It can solve problems such as bad, not strict symmetry, and weakening effects of low-order current harmonics, and achieve weakening effects. Good, good symmetry, less winding turns

Pending Publication Date: 2019-03-29
吉安伊戈尔电气有限公司 +2
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example US Patent 2011 / 0051480A1, such as figure 1 As shown, although the three secondary windings are designed with a 20° electrical angle difference in turn, and each iron core column has six coils, but the phase part of the first autocoupling winding A (B, C) on the secondary side is connected to the third autocoupling The phase part of the coupling winding A (B, C) is not strictly symmetrical with respect to the axis of the second winding A (B, C) phase in practical applications, resulting in poor current low-order harmonic weakening effect on the primary winding side in practical applications.

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
  • Design scheme of three-phase to nine-phase step-up step-down auto-coupling phase-shifting transformer
  • Design scheme of three-phase to nine-phase step-up step-down auto-coupling phase-shifting transformer
  • Design scheme of three-phase to nine-phase step-up step-down auto-coupling phase-shifting transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The structure, voltage phase vector diagram, etc. of the three-phase to nine-phase step-down or step-up auto-phase-shifting transformer product using the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] The first one is a three-phase to nine-phase step-down autophase-shifting transformer: the voltage phasor diagram is as follows figure 2 as shown, figure 2 The thick solid line in represents the turn distribution and connection, figure 2 The thin solid line in represents the voltage phasor.

[0021] 0A Indicates the phase A phase voltage of the primary side winding, Oa 1 , Oa 2 , Oa 3 Represents the three windings on the secondary side a 1 Mutually, a 2 Mutually, a 3 phase-to-phase voltage. OA and Oa 3 same phase, Oa 1 advanced Oa 3 20°, Oa 2 lag Oa 3 20°, Oa 1 and Oa 2 Corresponding coils about 0A perfectly symmetrical, 0a 3 and 0A Overlap...

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 design scheme of a three-phase to nine-phase step-up step-down auto-coupling phase-shifting transformer. Secondary side windings are successively displaced by an electrical angle of 20 degrees. The secondary side 20-degree winding and a 20-degree winding are symmetric about its 20-degree winding axis, so a 20-degree voltage vector and a 20-degree voltage vector are symmetric about a voltage vector. The scheme has less additional winding turns of the three windings on the secondary side (20 degrees, 0, 20 degrees), good symmetry, and a resultant magnetic potential closer to a sine wave. A primary winding side has a good current low-order harmonic attenuation effect. The phase-shifting transformer with the auto-coupling structure has a design capacity only about 10%of a phase-shifting transformer of isolation structure, which can greatly reduce manufacturing cost.

Description

technical field [0001] The invention relates to an AC-to-DC power converter, in particular to a three-phase to nine-phase step-up and step-down self-coupling phase-shifting transformer in the AC-to-DC power converter. Background technique [0002] With the improvement of rectification power level, multi-pulse rectification circuits have been widely used in power electronics, motor drives, aircraft conversion systems, high-voltage direct current transmission and other fields. Although high-frequency PWM rectification can make the input current close to a sine wave, the cost is high, the switching loss is large, and the efficiency is not high, which limits the application of PWM rectification in high-power occasions. The multi-pulse rectification technology represented by the phase-shifting transformer plus uncontrolled rectification technology can effectively reduce the harmonic current on the input side, and has the advantages of high efficiency and strong overload capacity,...

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): H01F30/02H01F30/14H01F27/28H01F27/30
CPCH01F27/28H01F27/306H01F30/02H01F30/14
Inventor 陈乔夫张今朝李敬民肖俊承
Owner 吉安伊戈尔电气有限公司
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