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

Topology capable of realizing multiple phase current reconstruction algorithms

A phase current reconstruction and topology technology, which is applied in the estimation/correction of motor parameters, etc., can solve the problems of reduced working area and inability to perform overmodulation

Active Publication Date: 2019-04-16
HARBIN INST OF TECH
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also certain disadvantages, mainly because the effective working area will be reduced and overmodulation cannot be performed.

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
  • Topology capable of realizing multiple phase current reconstruction algorithms
  • Topology capable of realizing multiple phase current reconstruction algorithms
  • Topology capable of realizing multiple phase current reconstruction algorithms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but it is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be covered by the present invention. within the scope of protection.

[0019] The invention proposes a new topology capable of realizing multiple phase current reconstruction algorithms, and simultaneously collects the sum of currents of three branches through a wire-wound current sensor. Such as figure 1 As shown, the topology includes bus positive pole, bus negative pole, power tube Q 1 ~Q 6 . The isolated current sensor, wherein: the isolated current sensor is installed in the power tube Q 1 and Q 3 Between, Q 6 and Q 2 Between and Q 4 Between the negative pole of the busbar, it is used to detect Q 1 and Q 3 Be...

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 topology capable of realizing multiple phase current reconstruction algorithms. The topology comprises a positive DC bus, a negative DC bus, power transistors of Q1 to Q6 andan isolated current sensor, wherein the isolated current sensor is used to detect current between the Q1 and the Q3, between the Q6 and the Q2, and between the Q4 and a bus negative electrode. Compared with a topology adopted by the traditional zero voltage vector sampling method, the topology used in the invention can integrate the advantages of the previous algorithms. When an SVPWM runs in a normal area, phase current reconstruction can be completed through two fixed sampling points, and information of the other two sampling points can be used to correct reconstructed phase current. When the SVPWM enters an over-modulated running state, the existing algorithms can be used to reconstruct the phase current, and thus, reconstruction of phase current in the whole running state can be realized.

Description

technical field [0001] The invention relates to a new topology for phase current reconstruction performed by a single current sensor, which can realize the effect of integrating multiple phase current reconstruction algorithms. Background technique [0002] The traditional permanent magnet synchronous motor control system has been widely used in the industrial field. Most of the existing control systems need to collect phase current information to complete the current loop control. This requires at least two current sensors to complete the sampling of the phase current. A high-precision current sensor is not only expensive, but also occupies a certain volume. Saving one current sensor will save a lot of cost and a certain space, so the single current sensor technology has become a research hotspot. [0003] The existing topologies that use a single current sensor to complete phase current reconstruction are mainly divided into two categories. One is to install the current ...

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): H02P23/14
CPCH02P23/14
Inventor 徐永向卢伟邹继斌肖利军邹继明禹国栋
Owner HARBIN INST 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