Direct torque control method for six-phase synchronous motor with zero-sequence current self-correction

A technology of direct torque control and zero-sequence current, applied in the field of multi-phase permanent magnet motor drive control, can solve the increase of low-order harmonic components of phase current, decrease of steady-state performance of direct torque control drive system, and decrease of load capacity And other issues

Active Publication Date: 2015-02-04
SOUTHEAST UNIV
View PDF5 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the voltage vector is used to achieve high-performance control of electromagnetic torque and stator flux linkage, if the remaining three degrees of freedom lack correct and effective control,

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
  • Direct torque control method for six-phase synchronous motor with zero-sequence current self-correction
  • Direct torque control method for six-phase synchronous motor with zero-sequence current self-correction
  • Direct torque control method for six-phase synchronous motor with zero-sequence current self-correction

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0062] The present invention will now be further described in conjunction with the embodiments and the drawings of the specification.

[0063] In the embodiment of the present invention, the drive system hardware structure is as Picture 8 Shown, including: rectifier circuit, filter capacitor, six-phase inverter, 60-degree biased six-phase symmetric winding permanent magnet synchronous motor, six-phase winding current acquisition circuit, rotor position angle acquisition circuit, isolation drive, central controller, Human-machine interface. A suitable DC power supply can also be used to provide the DC bus voltage of the three-phase inverter. The power tube in the inverter uses IGBT or MOFET, and the central controller uses DSP or single-chip microcomputer. The winding current acquisition circuit is composed of a combination of a Hall current sensor and an operational amplifier, or a combination of a winding string power resistance followed by a differential operational amplifier...

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 direct torque control method for a six-phase synchronous motor with zero-sequence current self-correction. The direct torque control method for the six-phase synchronous motor with the zero-sequence current self-correction comprises firstly, performing voltage vector reconstruction based on an idea that a zero-sequence current is equal to zero and accordingly proposing an idea DTC (Direct Torque Control); secondly, performing discrete compensation on the actual voltage vector acting time based on the dead-time compensation principle; finally, continuously compensating the voltage vector acting time through a PI adjuster and achieving a purpose that the zero-sequence current is equal to zero. The direct torque control method for the six-phase synchronous motor with the zero-sequence current self-correction solves the problem of eliminating low-order harmonic currents in a six-phase symmetrical winding permanent magnet motor DTC system of a torque and magnetic flux linkage double-hysteresis-loop structure.

Description

technical field [0001] The invention belongs to the field of multi-phase permanent magnet motor drive control and relates to a direct torque control method of a six-phase permanent magnet synchronous motor. Background technique [0002] As warship and submarine propulsion systems, aerospace propulsion systems, electric / hybrid fuel vehicle drives, electric locomotive traction and other key areas have higher and higher reliability requirements for motor drive systems, traditional three-phase motor drives are becoming more and more difficult to meet the requirements. High-reliability multi-phase motor drive systems are increasingly favored and used in these fields. Common multi-phase motors are divided into induction motors and permanent magnet synchronous motors. Among them, multi-phase permanent magnet synchronous motors have the advantages of high efficiency and fast response speed, and are increasingly becoming a strong competitor of multi-phase induction motors. [0003] ...

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): H02P21/13
Inventor 周扬忠程明
Owner SOUTHEAST 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