A sensorless boost-type direct vector control for induction motor drive

In this paper, a novel sensorless boost-type DC/AC motor drive is proposed. Based on a generalized zero vector technique, the proposed drive has several advantages such as higher output voltage to increase motor efficiency, reduced weight and space of the battery etc. The magnitude, phase and frequency of air-gap flux can be obtained by adopting 120° control strategy for motor coil. Therefore, using the signals of air-gap flux some motor parameters can be modified easily in real time to achieve real vector control for driving motor. Besides, the proposed drive can regenerate energy back to source to increase efficiency such that it can be applied to hybrid vehicle. Finally, some experimental results are presented for verification.