無感測元件之感應馬達轉速估計

Abstract

應用傳統的轉速計來量測感應馬達的速度，將使得感應馬達原本的優點例 如：耐粗、不需維護、工作於惡劣環境等，受到相當的限制。因此有許多 無感測元件感應馬達轉速估測的方式被提出。本篇論文使用馬達模型估測 定子磁通，依此建立估測馬達轉速之模型進行模擬，並且使用定子感應轉 子齒槽諧波實際去估測轉速。實驗及模擬比較的結果，可以分別看出兩種 方式的的特性和限制。 The conventional speed transdusers in induction motor drives impose restrictions on the mechanical ruggedness, the maintenance and the use in poor enviroment. Therefor, a large number of schemes for speed sensorless ac drives has been proposed. In this thesis, the stator flux space vector is estimated in terms of mathematic induction motor model using measured currents and voltages to and calculate the rotor speed. This rotor speed signal is simulated to be a reference signal. Another rotor speed estimation is based on rotor slots harmonics detection. Experiment results are presented to demonstrate the characteristics and restrictions of the two different speed estimation methods.