二次磁束制御方式誘導電動機の速度センサレスベクトル制御法

抄録

The vector controlled induction motor has been widely used for variable speed drive systems and its application fields are expanding. In these application fields, drive systems without various sensors are expected to be realized from a simplicity and reliability standpoint.
The paper presents a new type of sensor-less vector controlled Induction Motor (IM), that is, the secondary flux controlled IM without a speed and a voltage sensors. Since the original secondary flux control does not have a direct current loop which is commonly used in the conventional vector control, the proposed sensor-less algorithm is based on the current control error caused by an estimation error of speed. The proposed system only requires a current detector, and whole control processing including the vector control and the speed estimation is performed by a software using DSP-TM S 32010 within 99 μs. The experimental result showed the steady state speed control range of 1:30 under rated load and of 1:100 under no load conditions, respectively. Moreover, an adaptive operation to the unknown mechanical parameter using a learning process was introduced and, as a result, the specified speed transient characteristics were realized.