Title :
Robust speed control of brushless direct-drive motor using integral variable structure control
Author :
Chung, S.K. ; Lee, J.H. ; Ko, J.S. ; Youn, M.J.
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
fDate :
11/1/1995 12:00:00 AM
Abstract :
A robust speed control technique for a brushless direct-drive motor (BLDDM) using a variable structure control (VSC) approach is presented. The significant problems of conventional VSC are investigated in view of the practical implementation and an integral variable structure control with a load torque observer is proposed as an effective way of overcoming these problems. By employing the proposed control scheme, the robustness against the unknown disturbance can be improved in the transient state and the steady-state error can be minimised by an integral action. Furthermore, the reduction of the chattering is also realised by using a load torque observer. The proposed algorithms are implemented using the software of DSP TMS320C30 and the effectiveness is verified through the comparative simulations and experiments for the BLDDM driven by a three phase voltage-fed PWM inverter
Keywords :
AC motor drives; PWM invertors; brushless machines; digital control; digital signal processing chips; machine control; observers; power engineering computing; robust control; torque control; variable structure systems; velocity control; DSP TMS320C30; brushless direct-drive motor; chattering reduction; integral variable structure control; load torque observer; robust speed control; steady-state error minimisation; three phase voltage-fed PWM inverter; transient state; unknown disturbance robustness;
Journal_Title :
Electric Power Applications, IEE Proceedings -
DOI :
10.1049/ip-epa:19952230
