A method for estimating initial rotor position of surface-mounted permanent magnet synchronous motor

A technology of rotor initial position and permanent magnet synchronous motor, which is applied in the control of generators, motor generators, and electromechanical transmissions. Difficulty and other problems, to achieve the effect of improving selection accuracy, reducing mutual influence, and improving accuracy

Active Publication Date: 2015-08-05
YOUIBOT ROBOTICS CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for surface-mounted permanent magnet synchronous motors where the saliency effect is not obvious, only the pulse vibration high-frequency injection method can be used.
[0005] The pulse vibration high-frequency injection method has complex algorithms, difficult signal processing, and high requirements for hardware processing capabilities, so it is difficult to implement

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 method for estimating initial rotor position of surface-mounted permanent magnet synchronous motor
  • A method for estimating initial rotor position of surface-mounted permanent magnet synchronous motor
  • A method for estimating initial rotor position of surface-mounted permanent magnet synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] A method for identifying the initial position of a surface-mounted permanent magnet synchronous motor rotor, comprising the following steps, see figure 1 Shown:

[0033] (1) To the two-phase rotation estimation coordinate system of the motor rotor of Inject pulse vibration high-frequency voltage signal on the shaft exist No signal is injected on the axis, where U dh is the amplitude of the injected voltage, ω h is the angular frequency of the injection voltage; the injection angle is scanned within the range of 360° electrical angle to obtain the estimated coordinate system high-frequency feedback current signal of the shaft, draw a high-frequency feedback current amplitude curve according to the high-frequency feedback current signal, and judge whether the motor has a saliency effect, and if the motor has a saliency effect, continue to step (1), ot...

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 surface-mounted type permanent magnet synchronous motor rotor initial position estimation method. Firstly, according to the sensitive degree of a salient pole characteristic and produced position vibration and vibration noise of a motor rotor, an injecting voltage amplitude and frequency suitable for a specific motor are chosen; then, according to determined parameters, pulse vibration high-frequency injection is carried out in an optimized injection angle scanning mode, and the peak position of a high-frequency current amplitude curve is extracted; at last, according to a nonlinear magnetization characteristic of a stator core, the N and S polarities of a permanent magnet are determined, and therefore the initial position of the rotor is determined. The surface-mounted type permanent magnet synchronous motor rotor initial position estimation method resolves various realistic problems of an initial position estimation stage, improves recognition precision, weakens negative influences of an injection process, and can effectively estimate any surface-mounted type permanent magnet synchronous motor rotor initial positions.

Description

technical field [0001] The invention relates to the field of vector control of permanent magnet synchronous motors, in particular to a method for estimating the initial position of a surface-mounted permanent magnet synchronous motor rotor. Background technique: [0002] When performing vector control on permanent magnet synchronous motors, both Clarke transformation and Park transformation need to use electrical angle information. For speed loops, speed feedback is even more essential, so it is necessary to be able to obtain the position of the permanent magnet synchronous motor rotor information. Commonly used position and speed feedback components mainly include photoelectric encoders, Hall sensors, resolvers, inductive synchronizers, gratings, laser interferometers, etc. Among them, in permanent magnet synchronous motors, rotary photoelectric encoders are commonly used, and photoelectric encoders are installed at the end of the rotor shaft of most permanent magnet synch...

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): H02P21/14
Inventor 梅雪松孔凡峰张迎庆陶涛许睦旬刘善慧
Owner YOUIBOT ROBOTICS CO LTD
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