A Discrete-time Variable Structure Control for Brushless DC Motor Drives
Date Issued
2005
Date
2005
Author(s)
Chang, Tien-Hao
DOI
zh-TW
Abstract
This thesis realizes non-uniform sampling discrete time variable structure control for brushless dc motor by DSP TMS320F243. Because the system information (the position and speed ) is implied in the trajectory and obtained through Hall sensor device, thus, the opportunity of measurement is closely related to speed of the system, have formed a non-uniform sampling time. The parameters of the motor will cause the change because of temperature , or some external factors in addition, so this thesis adopts discrete time variable structure control. The most salient feature of this control method is its robustness to the system uncertainties, and the phenomenon of non-uniform sampling will be considered. We obtain the state variable by feedback the dc bus current of inverter, and calculate motor speed by Hall sensor signal, then get the ordering value of dc bus current with the discrete time variable structure control, adjust the current flowing through the dc bus, reach the speed control. Simulation result is based on MATLAB/SIMULINK. Experimental results obtained from the implementation on a DC brushless motor. To prove smooth and accurate control can be achieved.
Subjects
離散時間可變結構控制
直流無刷馬達
滑順模式控制
Discrete-time variable structure control
BLDC motor
Sliding mode control
Type
thesis
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