Author： Ko Jong Sun Jung Young Seok Youn Myung Joong
Publisher： Taylor & Francis Ltd
ISSN： 1362-3060
Source： International Journal of Electronics, Vol.80, Iss.2, 1996-02, pp. : 201-209
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Abstract
A new control method for the robust position control of a brushless DC (BLDC) motor using the adaptive load torque observer is presented. For a 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 of 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 theLyapunov stability theorem. As a result, the robustness can be obtained without a response. The load disturbance detected by the adaptive 0-observer is compensated for by feedforwarding the equivalent current having the fast response. ecting the overall system
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