Motor control method based on hall ellipse correction and sector linear model

The motor control method based on Hall ellipse correction and sector linear model solves the jitter and noise problems caused by motor defects in devices such as drone gimbals, reduces costs and improves supply chain utilization, and is particularly suitable for applications that are sensitive to size, weight and cost.

CN122247260APending Publication Date: 2026-06-19SHINE OPTICS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHINE OPTICS TECH CO LTD
Filing Date
2026-03-11
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Motors used in devices such as drone gimbals have defects such as uneven magnetization, magnetic pole eccentricity, back EMF distortion, and Hall amplitude-phase mismatch, which lead to operating jitter, unstable speed, and high noise. Existing control methods require high-precision sensors and expensive encoders, which increases costs and reduces yield.

Method used

A motor control method based on Hall elliptic correction and sector linear model is adopted. By installing orthogonal Hall sensors on the motor stator, the Hall sensor signals are elliptic corrected and compensated to establish a sector linear model, calculate the real-time mechanical angle and generate motor control signals, replacing high-precision hardware sensors and complex algorithms.

Benefits of technology

It reduces hardware and software costs, improves motor utilization, and enhances product cost-effectiveness, making it suitable for cost-, size-, and weight-sensitive applications.

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Abstract

This invention discloses a motor control method based on Hall effect elliptic correction and sector linear models, comprising: installing orthogonal Hall sensor pairs and determining elliptic correction compensation parameters through offline correction; dividing mechanical sectors and establishing a linear model representing the correspondence between electrical angles and mechanical angles for each mechanical sector; performing elliptic correction on the original output signals of the orthogonal Hall sensor pairs according to the elliptic correction compensation parameters, and calculating the real-time mechanical angles based on the elliptic-corrected output signals; querying the mechanical sector where the real-time mechanical angles are located, and calculating the corresponding real-time electrical angles according to the linear model; and generating corresponding motor control signals based on the real-time electrical angles. This invention replaces hardware precision with algorithms, resulting in extremely low hardware costs, low computational load, low processor requirements, and the ability to correct traditionally defective motors to a usable or even high-performance level, significantly improving supply chain utilization and product cost-effectiveness.
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