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MRAC load torque observer for position control of brushless DC motor

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4 Author(s)
Jong Sun Ko ; Production Eng. Center, Samsung Electron., Suwon, South Korea ; Young Seok Jung ; Sung Kwun Kim ; Myung Joong Youn

A new control method for the robust position control of a brushless DC (BLDC) motor using the adaptive load torque observer is presented. For the BLDC motor system approximately linearized using the field-orientation method, it is shown that the augmented state variable feedback can be applicable to this system. To overcome the problem of the unknown parameter or the parameter variation such as a flux linkage, a model following adaptive control mechanism is employed for the load torque observer. Stability analysis is carried out using Lyapunov stability theorem. As a result, the robustness can be obtained without affecting the overall system response. The load disturbance detected by the adaptive 0-observer is compensated by feedforwarding the equivalent current having the fast response

Published in:

Power Electronics and Drive Systems, 1995., Proceedings of 1995 International Conference on

Date of Conference:

21-24 Feb 1995

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