벡터인버터 응용을 위한 동작중 폐루프 플랜트식별 = In-Situ Closed-Loop Plant Identification for Vector Inverter Applications

다국어 초록 (Multilingual Abstract)

A vector inverter-driven induction motor generally shows very good torque and speed performance for some well-defined loads while these loads actually vary in a wide range. This paper proposes an On-Line/In-Situ identification(ID) for the time-varying loads with a view to an auto-tuning approach where a vector torque controller gives a stable operation point(Q point) for the speed loop ID. For the implementation of the identification, an extended recursive least square algorithm is coded in C-language in a factorized form for some numerical computing efficiency and robustness. A pseudo-random binary sequence is designed and used after being filtered as input signals for ID algorithm, which are added to a Q point(synchronous stator q-current level). Some conditions for the inner curernt loop, so torque loop needed for In-Situ ID are also considered and implemented such as low-pass filtering of synchronous stator q-current level.
The experimental results confirmed the validity of this approach in a special motor-servomotor type generator testing set.