Motor current harmonic suppression device and method based on improved repetitive controller

A repetitive controller and harmonic suppression technology, which is used in the control of electromechanical transmissions, electromechanical brakes, and generators.

Active Publication Date: 2018-09-14
BEIHANG UNIV
View PDF1 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the purpose of the present invention is to overcome the deficiencies in the prior art, and solve the deviation between the targ...

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
  • Motor current harmonic suppression device and method based on improved repetitive controller
  • Motor current harmonic suppression device and method based on improved repetitive controller
  • Motor current harmonic suppression device and method based on improved repetitive controller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0067] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0068] In the specific implementation process, the specific implementation steps of the present invention are as follows:

[0069] (1) Perform coordinate conversion on the harmonic current, and calculate the dq axis harmonic current in the dq motor synchronous coordinate system.

[0070] When the motor is actually running, the stator three-phase current will contain a series of 6k±1 (k=1,2,…) harmonic components such as 5, 7, 11, and 13, as shown below:

[0071]

[0072] where i a i b i c Respectively A phase, B phase, C phase phase current; i 1 i 5 i 7 i 11 i 13 Respectively, the fundamental wave, the 5th harmonic, the 7th harmonic, the 11th harmonic, and the 13th harmonic current amplitude; θ 1 , θ 2 , θ 3 , θ 4 , θ 5 They are the initial phase angles of the fundamental wave, the 5th harmonic, the 7th harmonic, the 11th harmon...

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 relates to a motor current harmonic suppression device and method based on an improved repetitive controller. Stator harmonic current stored in a motor body coordinate system is switchedto a dq motor synchronization coordinate system through transformation of coordinates, then the improved repetitive controller is embedded in a current loop, and high-order current harmonics in the current loop are suppressed by high gain of the repetitive controller at specific frequency point, so that the stator harmonic current in the motor body coordinate system is suppressed. The device caneffectively suppress a series of 6k plus/minus 1(k=1, 2,...)-order harmonic components in the stator current, original system parameters need no change for embedding of the improved repetitive controller, and flexibility of an overall control algorithm is improved.

Description

technical field [0001] The invention belongs to the field of motor control, and in particular relates to a device and method for suppressing motor current harmonics based on an improved repetitive controller. Background technique [0002] Permanent magnet synchronous motors have the advantages of compact structure, high air gap flux, and high operating efficiency. They are widely used in electric vehicle drive systems, molecular pumps, centrifugal compressors, and wind power generation systems. [0003] The permanent magnet motor stator current contains With a large number of high-order harmonic components, the current waveform is seriously distorted. The existence of harmonics will increase the loss of the motor, especially the iron loss of the stator, which will cause the motor to heat up, and will also affect the smoothness of the motor's output speed and torque. Therefore, how to effectively suppress the harmonic current, reduce the loss of the motor, and improve the s...

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): H02P21/00H02P29/50
CPCH02P21/00H02P29/50H02P2207/05
Inventor 宋欣达吴永燎韩邦成郑世强李红
Owner BEIHANG 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