期刊
IET ELECTRIC POWER APPLICATIONS
卷 10, 期 5, 页码 375-383出版社
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-epa.2015.0369
关键词
electric potential; sensorless machine control; torque control; voltage control; linear motors; advanced angle control strategy; doubly salient electromagnetic motor; DSEM torque output performance improvement; commutation signal; silent phase voltage; preset threshold value; excitation back electromotive force; excitation field saturation; sensorless advanced angle control strategy; sensorless AAC strategy; piecewise linear fitting EBEMF; advance commutation interval; steady procedure; dynamic procedure
This paper proposes a sensorless method for doubly salient electro-magnetic motor (DSEM). The commutation signals are obtained through the comparison between the voltage of silent phase and a pre-set threshold value based on the characteristic that the excitation back electromotive force (EBEMF) at commutation points is unaffected by the saturation of excitation field. Furthermore, in order to improve the torque output performance of DSEM, a novel sensorless advanced angle control (AAC) is investigated. Unlike traditional AAC, through piecewise linear fitting EBEMF in advance commutation interval, this method does not require the detection of standard commutation points. The experiments implemented on a 12/8-pole DSEM validate the proposed methods over a wide range of speed and load conditions in both steady and dynamic procedures.
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