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Magnetic encoder and its calibration method and calibration device, motor and unmanned aerial vehicle

A calibration method and magnetic encoder technology, applied in the direction of transmitting sensing components, instruments, etc. by using electric/magnetic devices, can solve problems such as unfavorable miniaturization of the pan/tilt design

Active Publication Date: 2021-10-08
GUANGZHOU XAIRCRAFT TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the magnetic encoder is used in scenarios such as the gimbal of an unmanned aerial vehicle, a miniaturized design is often required
The existing installation method of the magnetic sensor and the magnet facing each other usually requires a space of about 1.5-3mm for installation, which is not conducive to the miniaturization design of the gimbal

Method used

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  • Magnetic encoder and its calibration method and calibration device, motor and unmanned aerial vehicle
  • Magnetic encoder and its calibration method and calibration device, motor and unmanned aerial vehicle
  • Magnetic encoder and its calibration method and calibration device, motor and unmanned aerial vehicle

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Embodiment Construction

[0041] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0042] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be understood as indicating or implying Its relative importance o...

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Abstract

The embodiment of the present invention provides a magnetic encoder, its calibration method and calibration device, a motor, and an unmanned aerial vehicle, belonging to the field of electronic control. The calibration method includes: obtaining the detection angle detected by the magnetic encoder; adjusting the electrical angle of the rotor of the three-phase symmetrical motor based on the space vector pulse width modulation according to the difference between the detection angle and the given mechanical angle to be calibrated, so as to Make the difference be within the preset threshold range; when the difference is within the preset threshold range, store the current electrical angle as the first electrical angle calibration value corresponding to the given mechanical angle to the corresponding storage unit to complete the calibration of the given mechanical angle. In this way, the calibration between the detection angle of the side-type magnetic encoder and the electrical angle of the three-phase symmetrical motor can be completed, so that the side-type magnetic encoding can be applied to the angle detection of the three-phase symmetrical motor, so as to realize the The purpose of miniaturization design.

Description

technical field [0001] The invention relates to the field of electronic control, in particular to a magnetic encoder, its calibration method and calibration device, a motor and an unmanned aerial vehicle Background technique [0002] Magnetic encoders are widely used as sensors in angle and position detection due to their non-contact, small size, low cost, simple structure and high reliability. In applications involving motor positioning, such as gimbals, magnetic encoding schemes are usually used to detect the angle and position of the motor. Such as figure 1 As shown, in the current magnetic encoder, the magnetic sensor is usually used facing the magnet. The advantage of this is that the magnetic field generated by the magnet is evenly distributed at the magnetic sensor, and the angular output of the magnetic sensor is linear to the actual mechanical angle of the motor. In this way, the magnetic encoder can basically not be calibrated, or it can be calibrated by connecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/244G01D18/00
Inventor 于江涛
Owner GUANGZHOU XAIRCRAFT TECH CO LTD
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