NDLI: Position sensorless control for doubly salient electro-magnetic motor based on line-to-line voltage

Content Provider	IET Digital Library
Author	Zhou, Xingwei Zhou, Bo Yang, Lan
Abstract	This study first proposes a novel position sensorless control method for doubly salient electro-magnetic motor (DSEM) based on line-to-line voltage. The commutation instants are estimated by comparing the proper line-to-line voltage with a commutation threshold value, which is preset according to motor speed and field current. Since only line-voltage is required, the negative influence of DSEM neutral point voltage variation is eliminated. Moreover in addition, line-to-line voltage has a gain of phase back-electromotive force (EMF), so the application speed range is desired to be extended. Then, the sensorless commutation lags introduced by reluctance back EMFs and low-pass filters are analysed in detail, with the obtained mathematic expressions, a uniform compensation strategy by adjusting the commutation threshold value is proposed. With no need for extra hardware, the compensation strategy has the merit of easy implementation. What is more, to overcome the restriction of the distorted commutation signal arising in freewheeling process, a constraint of three-phase currents is developed to avoid false commutation. Finally, the experiments on a 12/8-pole DSEM validate the correctness and feasibility of the proposed techniques.
Starting Page	81
Ending Page	90
Page Count	10
ISSN	17518660
Volume Number	12
e-ISSN	17518679
Issue Number	Issue 1, Jan (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/12/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2017.0102
Journal	IET Electric Power Applications
Publisher Date	2017-08-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	A.C. Machine Commutation Instant Estimation Commutation Threshold Value Adjustment Compensation Control of Electric Power System D.C. Machines Distorted Commutation Signal Doubly Salient Electromagnetic Motor DSEM Neutral Point Voltage Variation Electric Motors Electric Potential Electrostatics Field Current Freewheeling Process Line-to-line Voltage Low-pass Filter Mathematic Expressions Motor Speed Phase Back-electromotive Force Position Control Position Sensorless Control Method Reluctance Back EMF Sensorless Commutation Lags Sensorless Machine Control Spatial Variables Control Three-phase Current Constraint Uniform Compensation Strategy
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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