Robust digital position control of brushless DC motor with adaptive load torque observer

Author

Ko, J.S. ; Lee, J.H. ; Youn, M.J.

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea

Volume

141

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

63

Lastpage

70

Abstract

A new control method for the robust position control of a brushless DC (BLDC) motor using the adaptive load torque observer is presented. It is shown that the augmented state variable feedback can be applied to the BLDC motor system approximately linearised using the field-orientation method. To overcome the problem of an unknown parameter or a parameter variation such as a flux linkage, an adaptive mechanism is employed. As a result, the robustness can be obtained without affecting the overall system response. The load disturbance is detected by the adaptive 0-observer of an unknown and inaccessible input, and is compensated by feedforwarding the equivalent current having the fast response

Keywords

DC motors; digital control; machine control; model reference adaptive control systems; parameter estimation; position control; power engineering computing; torque control; adaptive 0-observer; adaptive load torque observer; augmented state variable feedback; brushless DC motor; equivalent current feedforward; field-orientation method; flux linkage; load disturbance; model reference adaptive control; robust digital position control; unknown parameter;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:19949858

Filename

277977