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

Abstract

The embodiment of the invention provides a magnetic encoder, a calibration method and calibration device thereof, a motor and an unmanned aerial vehicle, and belongs to the field of electronic control. The calibration method comprises the following steps of acquiring a detection angle detected by the magnetic encoder; adjusting an electric angle of a rotor of a three-phase symmetric motor based onthe space vector pulse width according to the difference between the detection angle and a to-be-calibrated given mechanical angle, thereby enabling the difference to be located in the preset threshold range; under the condition that the difference is located in the preset threshold range, taking the current electric angle as a first electric angle calibration value corresponding to the given mechanical angle to store in a storage unit corresponding to the given mechanical angle, thereby accomplishing the calibration on the given mechanical angle. Therefore, the calibration between the detection angle of a side type magnetic encoder and the electric angle of the three-phase symmetric motor can be accomplished, so that the side magnetic encoder can be applied to the angle detection of thethree-phase symmetric motor, thereby realizing a miniaturization design aim of the cloud cradle and like equipment.

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...

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

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