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

Parameter identification control device and control method of sensorless permanent magnet synchronous motor

A permanent magnet synchronous motor, parameter identification technology, applied in the direction of motor generator control, electromechanical transmission control, electronic commutation motor control, etc., can solve the problem of parameter identification

Inactive Publication Date: 2012-10-17
HARBIN INST OF TECH
View PDF5 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the existing positionless control method of permanent magnet synchronous motor cannot realize the identification of parameters when the motor runs within the speed range, and provides a sensorless permanent magnet synchronous motor parameter identification control device and control method

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
  • Parameter identification control device and control method of sensorless permanent magnet synchronous motor
  • Parameter identification control device and control method of sensorless permanent magnet synchronous motor
  • Parameter identification control device and control method of sensorless permanent magnet synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0042] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the parameter identification control device of sensorless permanent magnet synchronous motor described in this embodiment, it includes permanent magnet synchronous motor 11, it also includes position sensor 1, speed controller 2, d-axis current controller 3, q Shaft current controller 4, first Park transformation circuit 5-1, second Park transformation circuit 5-2, inverse Park transformation circuit 6, first Clark transformation circuit 7-1, second Clark transformation circuit 7-2, space vector Pulse width modulation circuit 8, inverter 9, current transformer 10, voltage sensor 12, low-speed parameter identification circuit 13, first LC filter circuit 14-1, second LC filter circuit 14-2, high-speed parameter identification circuit 15, Resistance decoupling circuit 16, flux linkage decoupling circuit 17, speed decoupling circuit 18, operational amplifier integration circuit 19...

specific Embodiment approach 2

[0048] Specific implementation mode two: the following combination figure 1 This embodiment is described. This embodiment is a parameter identification control method for a sensorless permanent magnet synchronous motor based on the parameter identification control device for a sensorless permanent magnet synchronous motor described in Embodiment 1.

[0049] Comparator circuit 20 takes motor rotor speed given signal value ω ref Compared with the motor rotor speed ω bAfter the comparison, the operating mode of the control device is controlled by the comparison result, specifically:

[0050]

[0051] when ω ref b , the low-speed parameter identification circuit 13 is enabled under the control of the selection control signal output by the comparison circuit 20, and the flux linkage decoupling circuit 17 and the resistance decoupling circuit 16 stop running. At this time, the β output from the first LC filter circuit 14-1 The axis filtered voltage signal and the α-axis filter...

specific Embodiment approach 3

[0054] Specific implementation mode three: the following combination figure 2 Describe this embodiment, this embodiment is a further description of Embodiment 2, the d-axis current component and q-axis current It is obtained by solving the following formula:

[0055] d dt i ^ d 1 i ^ q 1 = - R s L s ...

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 parameter identification control device and a parameter identification control method of a sensorless permanent magnet synchronous motor, belongs to the technical field of control over the sensorless permanent magnet synchronous motor, and solves the problem that parameters cannot be identified by the conventional permanent magnet synchronous motor positionless control method when a motor operates in a rotating speed range. Parameter identification of the sensorless permanent magnet synchronous motor in each speed stage is realized by improvement of a control policy and a control method. In medium-high-speed stages, input amount is modeled by constructing a circuit, and output parameters are obtained; and in low-speed and zero-speed stages, the accuracy of model output amount is realized according to the accuracy of model input parameters. By the invention, a three-closed-loop control mode is employed, and the working modes of a system are switched according to the size of rotating speed in the parameter identification process. The invention is applicable to parameter identification of the sensorless permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to a parameter identification control device and a control method of a sensorless permanent magnet synchronous motor, belonging to the technical field of sensorless permanent magnet synchronous motor control. Background technique [0002] With its high power density, high efficiency, wide speed range, and fast response, permanent magnet synchronous motors are widely used in high-precision transmission fields such as CNC machine tools, industrial robots, and aerospace equipment, as well as energy-saving fields such as household appliances, fans, and pumps. . In order to detect the speed and position of the permanent magnet synchronous motor, it is necessary to add sensors to the motor. At present, the mechanical position sensors commonly used in permanent magnet synchronous motors include photoelectric encoders, resolvers, Hall and inductive synchronizers. While these mechanical position sensors can provide rotor magnetic pole pos...

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): H02P21/14H02P21/13H02P21/18
Inventor 刘剑李彦杨贵杰苏建勇宋和义张微
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