Unlock instant, AI-driven research and patent intelligence for your innovation.

Permanent magnet synchronous motor rotor position observer

A permanent magnet synchronous motor, rotor position technology, applied in the control of generator, motor generator control, control of electromechanical brakes, etc., can solve the problem of 6th harmonic pulsation observation error, achieve good dynamic performance, satisfactory control performance, The effect of improving control performance

Active Publication Date: 2015-04-15
哈工科讯(沈阳)智能工业技术有限公司
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the existing sensorless permanent magnet synchronous motor control technology suitable for medium and high speeds, that is, the model method. The obtained rotor position angle observation value contains 6th harmonic pulsation observation error problem, and provides a Permanent Magnet Synchronous Motor Rotor Position Observer

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
  • Permanent magnet synchronous motor rotor position observer
  • Permanent magnet synchronous motor rotor position observer
  • Permanent magnet synchronous motor rotor position observer

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0024] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the permanent magnet synchronous motor rotor position observer described in this embodiment, it includes sliding mode observer 1, saturation function processing module 2, low-pass filter 3, per unit processing module 4, neural network filter 5 and PLL 6,

[0025] The stator voltage u in the two-phase stationary coordinate system of the permanent magnet synchronous motor s Output stator current observation value after observation by sliding mode observer 1 The stator current observed value and stator current value i s The difference is taken as the stator current observation error i s , the stator current observation error i s After being processed by the saturation function processing module 2, the sliding mode control vector z under the two-phase stationary coordinate system is output, and the described sliding mode control vector z is processed by the low-pass filter ...

specific Embodiment approach 2

[0043] Specific implementation mode two: the following combination figure 2 Describe this embodiment, this embodiment will further explain Embodiment 1, and obtain the observed value of the α-axis back electromotive force e afα The process is:

[0044] Step a, get the rotor position observation value output by phase-locked loop 6 The sine term is multiplied by a gain of 5 7 times gain Rotor position observations The cosine term is multiplied by a gain of 5 7 times gain As a reference input to the neural network filter,

[0045] Step b, the last cycle α-axis counter electromotive force observation value e output by the neural network filter 5 afα (n-1) multiplied by the gain k 11 (n), k 12 (n), k 21 (n) and k 22 (n) Get four products,

[0046] Step c, the four products obtained in step b and the filter coefficient w of the previous cycle respectively 11 (n-1), w 12 (n-1), w 21 (n-1) and w 22 (n-1) are added to get the filter coefficient w 11 (n),w 12 (n...

specific Embodiment approach 3

[0049] Specific implementation mode three: the following combination image 3 Describe this embodiment. This embodiment is a further limitation of Embodiment 1, and the observed value e of the β-axis counter electromotive force is obtained afβ The process is:

[0050] Step 1. Obtain the rotor position observation value output by phase-locked loop 6 The sine term is multiplied by a gain of 5 7 times gain Rotor position observations The cosine term is multiplied by a gain of 5 7 times gain As a reference input to the neural network filter,

[0051] Step 2, the last cycle β-axis counter electromotive force observation value e output by the neural network filter 5 afβ (n-1) multiplied by the gain k 11 (n), k 12 (n), k 21 (n) and k 22 (n) Get four products,

[0052] Step 3. Combine the four products obtained in step 2 with the filter coefficient w of the previous cycle respectively 11 (n-1), w 12 (n-1), w 21 (n-1) and w 22 (n-1) are added to get the filter coe...

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 permanent magnet synchronous motor rotor position observer, belonging to the field of motor control, and aiming at solving the problem that a rotor position angle observed value obtained by an existing model method contains six subharmonic pulsation observation errors. The observer comprises a sliding mode observer, a saturation function processing module, a lowpass filter, a per unit processing module, a neural network filter and a phase locked loop. A stator current observed value is output after the stator voltage us of a permanent magnet synchronous motor is observed by the sliding mode observer, the difference between a stator current value is and the stator current observed value is taken as a stator current observed error is, a sliding mode control vector z is output after is is processed by the saturation function processing module, a reverse electromotive force vector e is output after z is processed by the lowpass filter, z is fed back to the sliding mode observer as input, per unit is output after e is processed by the per unit processing module, a reverse electromotive force observed vector is output after the reverse electromotive force vector is processed by the neutral network filter, and a rotor position observed value and a rotating speed observed value omega e of the permanent magnet synchronous motor are output after the reverse electromotive force vector is processed by the phase locked loop.

Description

technical field [0001] The invention relates to a rotor position observer of a permanent magnet synchronous motor, which belongs to the field of motor control. Background technique [0002] In recent years, the speed control system of permanent magnet synchronous motor has gradually become a research hotspot in the field of AC speed control transmission. The reason is that compared with the traditional asynchronous motor, the advantages of the permanent magnet synchronous motor are: simple structure, small size, light weight, reliable operation, high power density, good speed regulation performance, etc. It is the ideal choice for high-speed electric drive system, and its application field is very wide. According to the structure of the permanent magnet of the permanent magnet synchronous motor rotor, it can be divided into two types: surface mount type and built-in type. [0003] At present, in the application of high-performance permanent magnet synchronous motor speed c...

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): H02P21/13
Inventor 王高林张国强李卓敏李铁链于泳杨荣峰徐殿国
Owner 哈工科讯(沈阳)智能工业技术有限公司