NDLI: Initial rotor alignment method for doubly salient electromagnetic machine position sensorless startup

Content Provider	IET Digital Library
Author	Zhou, Xingwei Zhou, Bo Wang, Kaimiao
Abstract	The initial rotor alignment process plays an important role in ‘align and go’ which is a simple, implementable and widely industrial used position sensorless startup method. To deal with the possible jitter and reverse in the initial startup process, this Letter proposes a novel initial rotor alignment method for the position sensorless startup of the doubly salient electromagnetic machine (DSEM). According to the analysis of the generated electromagnetic torque, the relation between the alignment pulse and stable locating position is studied at first. Then, to improve the initial startup performance, the alignment pulse of switching on two upper transistors and one lower transistor is proposed to be injected as the alignment pulse since the stable locating position is around the middle point of rotor sector; it owns the benefit of better selection for the initial energising phase windings. The initial sensorless startup performance is desired to be improved in terms of no jitter or reverse. The experiments of initial alignment, as well as, the full process of the sensorless startup based on ‘align and go’ on a 12/8-pole DSEM validate the flexibility and effectiveness of the proposed method.
Starting Page	542
Ending Page	544
Page Count	3
ISSN	00135194
Volume Number	56
e-ISSN	1350911X
Issue Number	Issue 11, May (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/56/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2019.3472
Journal	Electronics Letters
Publisher Date	2020-01-22
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Alignment Pulse Control of Electric Power System D.C. Machines Doubly Salient Electromagnetic Machine Position Sensorless Startup DSEM Electric Generators Electromagnetic Torque Energising Phase Windings Initial Alignment Initial Rotor Alignment Method Initial Rotor Alignment Process Initial Sensorless Startup Performance Initial Startup Process Mechanical Variables Control Position Control Rotor Sector Rotors Sensorless Machine Control Spatial Variables Control Stable Locating Position Torque Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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