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

Default phase fault-tolerant control method of nine-phase flux-switching permanent magnetic motor

A permanent magnet motor and magnetic flux switching technology, applied in electronic commutation motor control, motor generator control, control system and other directions, can solve the problem of lack of analysis of multi-phase harmonic subspace harmonic components, lack of versatility and practicability , Unable to calculate the instantaneous value of fault-tolerant current online, etc.

Active Publication Date: 2014-08-06
SOUTHEAST UNIV
View PDF2 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the obtained solution is often not unique, and the optimization method can be used to find out the optimal result of a certain performance index, but this method needs to solve complex equations offline, and the instantaneous value of the fault-tolerant current cannot be calculated online. Lack of versatility and practicality
In addition, since there is no analysis of the multi-phase harmonic subspace harmonic components after phase loss, the algorithm can only use the method of hysteresis comparison in current 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
  • Default phase fault-tolerant control method of nine-phase flux-switching permanent magnetic motor
  • Default phase fault-tolerant control method of nine-phase flux-switching permanent magnetic motor
  • Default phase fault-tolerant control method of nine-phase flux-switching permanent magnetic motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention will be further explained below in conjunction with the accompanying drawings.

[0033] Such as figure 1As shown, a phase loss fault-tolerant control method of a nine-phase magnetic flux switching permanent magnet motor, through a photoelectric encoder 5, a vector control module 6 including a speed outer loop and eight current inner loops, and a space vector pulse width modulation module 7 and the nine-phase voltage type inverter 3 control the nine-phase magnetic flux switching permanent magnet motor 4, including the following specific steps:

[0034] Step 1), measure and calculate the rotor position θ of the motor through the photoelectric encoder r and the actual rotor speed ω r :

[0035] Step 2), the given speed value of the motor and the actual speed ω r After comparison, the quadrature-axis current component of the fundamental wave of the given electromagnetic torque is obtained through the PI regulator of the outer ring of the speed ...

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 default phase fault-tolerant control method of a nine-phase flux-switching permanent magnetic motor. The default phase fault-tolerant control method includes that redundancy characteristics and harmonic current of a nine-phase system are utilized to compensate a fault-tolerant control strategy; when a motor winding or a driving system is in a default-phase failure caused by one-phase circuit breaking or circuit shorting, by online calculating third, fifth and seventh harmonic current momentary values under copper loss minimum boundary conditions in real time and performing closed-loop decoupling control on the harmonic current, the motor can be smoothly transited from a nine-phase normal state to an eight-phase fault state and maintain both output rotating speed and rotating torque to be unchanged, undisturbed running of the driving system is realized, and requirements, of high-reliability application fields like track traffic and electromobiles, on system continuous running capability are met; during designing of the nine-phase flux-switching permanent motor, electromagnetic torque pulsation rate is lowered while high torque density of the special motor is retained.

Description

technical field [0001] The invention relates to a phase-deficiency fault-tolerant control method of a nine-phase magnetic flux switching permanent magnet motor, which belongs to the motor drive technology. Background technique [0002] In recent years, multiphase technology has been successfully applied in the field of high-power motor drive systems. Compared with the speed control system based on three-phase motors, the multi-phase system reduces the torque ripple and reduces the requirements for the capacity of switching devices. In addition, polyphase systems are highly fault-tolerant. Due to its own redundancy characteristics, after one or several phases fail, the motor can still run smoothly under the fault state through proper fault-tolerant control without adding additional hardware costs. [0003] At present, many scholars at home and abroad are devoted to the research of fault-tolerant technology of motor system. In terms of the motor itself, the most widely stud...

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): H02P21/14
Inventor 程明於锋花为邹国棠
Owner SOUTHEAST UNIV
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