Magnetoelectric encoder self correction method based on permanent magnet synchronous motor sensorless speed control

A technology of permanent magnet synchronous motors and magnetoelectric encoders, which is applied in the direction of instruments, can solve the problems of high precision requirements of photoelectric encoders, complex calibration tooling structure, and high calibration costs, so as to improve self-adaptive ability, reduce calibration costs, Effect of removing noise signal

Active Publication Date: 2018-06-19
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

However, the calibration tooling structure of this method is complex, and the accuracy of the photoelectric encoder is extremely high, and the calibration cost is high.

Method used

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  • Magnetoelectric encoder self correction method based on permanent magnet synchronous motor sensorless speed control
  • Magnetoelectric encoder self correction method based on permanent magnet synchronous motor sensorless speed control
  • Magnetoelectric encoder self correction method based on permanent magnet synchronous motor sensorless speed control

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Embodiment Construction

[0051] In order to make the object, technical solution and advantages of the present invention clearer, the present invention is described below through specific embodiments shown in the accompanying drawings. It should be understood, however, that these descriptions are exemplary only and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0052] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 , Figure 8 As shown, the specific implementation mode adopts the following technical scheme: a magnetoelectric encoder self-calibration method based on the sensorless speed control of the permanent magnet synchronous motor, characterized in that: the specific implementation process of the method is:

[0053] The self-calibration method of the magnetoelectric ...

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Abstract

The invention discloses a magnetoelectric encoder self correction method based on permanent magnet synchronous motor sensorless speed control, which relates to the field of magnetoelectric encoder error correction. In order to eliminate angle calculation errors of the magnetoelectric encoder, an angle error compensation method based on permanent magnet synchronous motor sensorless control is put forward. In order to acquire a high-precision virtual angle value, a sensorless speed control method for the permanent magnet synchronous motor is used. According to the deviation between the high-precision virtual angle value and a magnetoelectric encoder angle value, angle compensation is carried out. In order to eliminate noise signals in an angle compensation table and ensure the precision of the compensation table, an oversampling linear interpolation method is put forward. The method is technically characterized by comprising acquisition of a magnetoelectric encoder output angle value, making of the angle compensation table and table making by oversampling linear interpolation.

Description

technical field [0001] The invention relates to a self-calibration method of a magnetoelectric encoder based on sensorless control of a permanent magnet synchronous motor, belonging to the field of magnetoelectric encoder calibration. Background technique [0002] Magnetoelectric encoder is a new type of angle or position measuring device. It has the characteristics of anti-vibration, anti-corrosion, anti-pollution, anti-interference, and small size. It is widely used in machinery manufacturing, military industry, radar and other fields. The resolution of the magnetic encoder is affected by the hardware facilities, which causes the output delay of the angle or position, and needs to be calibrated when it is used. The existing calibration method is mainly to install the photoelectric encoder, motor, and magnetoelectric encoder coaxially. When the three are coaxially rotated, the angle values ​​of the photoelectric encoder and magnetoelectric encoder are uploaded synchronously...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D18/00
CPCG01D18/00Y02P70/10
Inventor 王磊任齐民张洪鑫韩继超
Owner HARBIN UNIV OF SCI & TECH
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