Open-winding six-phase inverter modulation method for inhibiting third harmonic and common-mode voltage

A technology of common-mode voltage and modulation method, which is applied in the field of open-winding six-phase inverter modulation, and can solve problems such as large third-order harmonic currents

Active Publication Date: 2019-07-02
SHANGHAI JIAO TONG UNIV
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned common-mode voltage suppression scheme will cause a large third harmonic current and cause a large loss

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
  • Open-winding six-phase inverter modulation method for inhibiting third harmonic and common-mode voltage
  • Open-winding six-phase inverter modulation method for inhibiting third harmonic and common-mode voltage
  • Open-winding six-phase inverter modulation method for inhibiting third harmonic and common-mode voltage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0053] Under the vector space decoupling (VSD) method, the six-dimensional electromagnetic quantity (f A ,f B ,f C ,f D ,f E ,f F ) will be mapped into three orthogonal two-dimensional subspaces. Its transformation formula and equal-amplitude transformation matrix are:

[0054] [f α ,f β ,f x ,f y ,f o1 ,f o2 ] T =T αβ [f A ,f B ,f C ,f D ,f E ,f F ] T (1)

[0055]

[0056] The frequency components corresponding to the transformed three orthogonal subspaces are as follows:

[...

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 an open-winding six-phase inverter modulation method for inhibiting a third harmonic and a common-mode voltage. The method comprises the following steps: mapping a six-dimensional electromagnetic quantity of a six-phase motor into three orthogonal two-dimensional subspaces; obtaining frequency components corresponding to the orthogonal two-dimensional subspaces; mapping thethird harmonic component to o1-o2 subspaces according to the frequency components corresponding to the orthogonal two-dimensional subspaces, wherein the o1-o2 subspaces refer to zero sequence subspaces; controlling the plane projection of a voltage vector in the o1-o2 subspace to be 0; controlling the common-mode voltage of a six-phase inverter of an independent bus topology to be 0 so as to obtain a voltage vector used for PWM modulation; and controlling the open-winding six-phase inverter according to the voltage vector used by the PWM modulation. Therefore, the common-mode voltage and the third harmonic current of the open-winding six-phase permanent magnet synchronous motor can be suppressed at the same time, and the motor loss caused by the harmonic current is reduced while the common-mode voltage is suppressed.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an open-winding six-phase inverter modulation method for suppressing third harmonics and common-mode voltage. Background technique [0002] Compared with the ordinary six-phase motor with independent neutral point, the open-winding six-phase motor will generate a large third harmonic current when the ordinary six-phase inverter modulation method is used, so a new PWM modulation method is required to suppress the third harmonic current Harmonic current. Also, since the windings of the six-phase motor are open, the neutral point no longer exists, requiring rejection of the common-mode voltage caused by the dual-inverter topology. The permanent magnet synchronous motor has the advantages of no excitation current, less stator current, copper loss, and rotor loss; the six-phase permanent magnet synchronous motor has higher fault tolerance, higher torque density, and smaller...

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): H02M7/5387H02M7/5395H02M1/12H02P27/12
CPCH02M1/12H02M7/53875H02M7/5395H02P27/12H02M1/123H02M7/53876
Inventor 高强陈浩
Owner SHANGHAI JIAO TONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap