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Measuring method for tooth groove torque of permanent magnet motor

A technology of permanent magnet motor and cogging torque, which is applied in force/torque/power measuring instruments, measuring devices, instruments, etc., which can solve the problems of high instrument cost, complicated measurement methods, and single test function

Active Publication Date: 2016-08-10
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method requires high precision torque sensor, complex measurement method, high instrument cost, and single test function

Method used

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  • Measuring method for tooth groove torque of permanent magnet motor
  • Measuring method for tooth groove torque of permanent magnet motor
  • Measuring method for tooth groove torque of permanent magnet motor

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Embodiment Construction

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0056] see figure 1 , is a schematic flowchart of an embodiment of a method for measuring cogging torque of a permanent magnet motor provided by the present invention.

[0057] In this embodiment, by utilizing a measuring device composed of a torque sensor, a signal preprocessing module, a signal acquisition module, a feature extraction module, and an industrial control computer, the method for measuring the cogging torque of a permanent magnet motor includes the following steps S101~step S108:

[0058] Step S101: The torque sensor detects the torque of the permanent magnet motor under test, and sends the sensing signal output by the torque sensor to the signal preprocessing module.

[0059] Step S102: the signal preprocessing module conditions the sensing signal. Specifica...

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Abstract

The invention discloses a wavelet-signal-analysis-based measuring method for tooth groove torque of a permanent magnet motor. The method comprises: a torque sensor is used for detecting a measured permanent magnet motor; a signal pre-treatment module carries out conditioning on a sensing signal; according to a preset sampling frequency fs and a sampling point number N, a signal acquisition module extracts a torque signal output frequency f of the sensing signal after conditioning, wherein the f meets a formula: f=fs / N, and a torque signal of the measured permanent magnet motor is calculated; a feature extraction module carries out multi-resolution decomposition on the torque signal to obtain a wavelet coefficient of the torque signal and corrects the wavelet coefficient; and wavelet reconstruction is carried out by using the corrected wavelet coefficient, thereby obtaining a tooth groove torque of the measured permanent magnet motor. According to the invention, the method is easy to implement; the measurement difficulty is low; the measurement precision is high, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of optimization design and control of permanent magnet motors, in particular to a method for measuring cogging torque of permanent magnet motors. Background technique [0002] With the continuous improvement of the performance of permanent magnet materials, permanent magnet motors are more and more widely used in high-performance speed and position electromechanical transmission control systems, such as numerical control machine tools, robots, electronic manufacturing, elevators and other fields. However, in a permanent magnet motor, the interaction between the permanent magnet and the slotted armature core inevitably produces cogging torque, which results in torque fluctuations, causing vibration and noise, and affecting the control accuracy of the system. [0003] Cogging torque is a problem specific to permanent magnet motors and is a position-related quantity that will not change after the motor is manuf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00
CPCG01L5/0061
Inventor 曾岳南曾励志陈艳张睿彭瑞陈康平
Owner GUANGDONG UNIV OF TECH
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