An improved torque sensorless speed control method for electric assisted bicycle with consideration of coordinate conversion

In this paper, we propose an improved torque sensorless speed control method for electric assisted bicycle, this method considers the coordinate conversion. A low-pass filter is designed in disturbance observer to estimate and compensate the variable disturbance during cycling. A DC motor provides a...

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Bibliographic Details
Published in:IEEE/CAA journal of automatica sinica 2020-11, Vol.7 (6), p.1575-1584
Main Authors: Li, Tinghua, Yang, Qinghua, Tu, Xiaowei, Ren, Bin
Format: Article
Language:English
Subjects:
Angular velocity
Bicycles
Bicycling
Control methods
Conversion
Coordinates
D C motors
Disturbance observers
Electric motors
Kinetic energy
Low pass filters
Roads
Speed control
Stability
Torque
Velocity control
Wheels
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Summary:In this paper, we propose an improved torque sensorless speed control method for electric assisted bicycle, this method considers the coordinate conversion. A low-pass filter is designed in disturbance observer to estimate and compensate the variable disturbance during cycling. A DC motor provides assisted power driving, the assistance method is based on the real-time wheel angular velocity and coordinate system transformation. The effect of observer is proved, and the proposed method guarantees stability under disturbances. It is also compared to the existing methods and their performances are illustrated through simulations. The proposed method improves the performance both in rapidity and stability.
ISSN:2329-9266
2329-9274
DOI:10.1109/JAS.2020.1003360