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

A current control method for a permanent magnet motor servo system

A servo system and current control technology, applied in the fields of substation or power distribution, power generation, and servo system motor drive control, can solve the problem of difficulty in taking into account the rapidity and stability of current response, and achieve the purpose of suppressing influence, improving performance, and improving stability. sexual effect

Active Publication Date: 2021-09-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the present invention provides a current control method for a permanent magnet motor servo system, which can suppress the influence of sampling errors on the current during the current steady-state process, and solves the problem of using a PI regulator in the servo system. It is difficult to balance the technical problem of rapidity and stability of current response

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
  • A current control method for a permanent magnet motor servo system
  • A current control method for a permanent magnet motor servo system
  • A current control method for a permanent magnet motor servo system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0044] The current control method of the permanent magnet motor servo system proposed by the application, its block diagram is as follows figure 1 shown. The collected information such as current and angle is calculated by the current controller to obtain the dq axis voltage, and then the αβ axis voltage is obtained through coordinate transformation, and the space vector modulation is notified to drive the power tube to be turned on and off, and then drive the motor.

[0045] The specific implementation is as follows

[0046] Build the motor model:

[0047]

[0048] And the rotor position θ, angular velocity ω e , three-phase current and other information are collected: and the coordinate transformation of the three-phase current is carried out to obtain the current i of the dq axis d i q ;

[0049]

[0050]

[0051] figure 2 is a d...

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 current control method of a permanent magnet motor servo system, which belongs to the technical field of power generation, power transformation or power distribution. In this method, the three-phase current at time k is obtained by sensor sampling, and the Park and Clark transformation is performed to obtain the dq-axis current in the rotating coordinate system, and then the dq-axis current value is predicted at the next time through the dq-axis current, and the predicted current value at time k is The current value sampled at time k is weighted and then averaged to obtain the corrected current value at time k. The corrected current value at time k is used to further predict the voltage value of the dq axis at the next time, and then the voltage value of the αβ axis is obtained by inverse park transformation. Combined with the DC side voltage of the three-phase inverter, the conduction sequence of the switch tubes is controlled by space vector pulse width modulation, and then the control of the motor is realized, which can suppress the influence of the sampling error on the current control in the steady state process.

Description

technical field [0001] The invention discloses a current control method of a permanent magnet motor servo system, relates to the field of servo system motor drive control, and belongs to the technical field of power generation, power transformation or power distribution. Background technique [0002] Permanent Magnet Synchronous Motor (PMSM, Permanent Magnet Synchronous Motor) is widely used in the servo field due to its advantages of high efficiency, small size, and high power density. In the early 1970s, German Siemens engineer F. Blasschke invented Field-Oriented Control (FOC, Field-Oriented Control), that is, after the vector control algorithm, the control performance of permanent magnet synchronous motors was greatly improved. On this basis, researchers, Combining FOC with modern control algorithms greatly improves the dynamic response, speed tracking and stability of the AC servo system. However, with the development of the industry, the performance requirements of th...

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 Patents(China)
IPC IPC(8): H02P21/22
CPCH02P21/22
Inventor 姜哲卜飞飞杨晓婷轩富强潘子昊
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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