Results 131 to 140 of about 285 (175)
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Real-Time Speed and Position Estimation Using Rotor Slot Harmonics
IEEE Transactions on Industrial Informatics, 2013It is well known that slotting harmonics exist in most of the electrical machines. So far, these harmonics are mainly identified using spectral estimation techniques. However, this approach requires long sampling and computation periods. In this study, a novel speed and position estimation method based on identification of rotor slot harmonics (RSH ...
Ozan Keysan, H. Bulent Ertan
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IEEE Power Engineering Review, 2001
Detection of rotor slot and other eccentricity related harmonics in the line current of a three phase induction motor is important both from the viewpoint of sensorless speed estimation as well as eccentricity related fault detection. However, it is now clear that not all three phase induction motors are capable of generating such harmonics in the line
S. Nandi, S. Ahmed, H.A. Toliyat
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Detection of rotor slot and other eccentricity related harmonics in the line current of a three phase induction motor is important both from the viewpoint of sensorless speed estimation as well as eccentricity related fault detection. However, it is now clear that not all three phase induction motors are capable of generating such harmonics in the line
S. Nandi, S. Ahmed, H.A. Toliyat
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A New Slip Frequncy Detector of an Induction Motor Utilizing Rotor Slot Harmonics
IEEE Transactions on Industry Applications, 1984A method to detect slip frequency from rotor slot harmonics of a three-phase squirrel-cage induction motor is proposed. The rotor slot harmonic voltage Is obtained by summing the three phase voltages, and after being sampled with a multiple of the stator frequency, it is changed into slip frequency waves, from which a voltage proportional to the slip ...
Muneaki Ishida, Koji Iwata
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Impact of MMF Space Harmonic on Rotor Losses in Fractional-Slot Permanent-Magnet Machines
IEEE Transactions on Energy Conversion, 2009The fractional-slot permanent-magnet (PM) machines are used in many applications due to their high torque density, low torque ripple, and high efficiency. However, the fractional-slot machines are characterized by high contents of space harmonics in the air-gap MMF distribution.
BIANCHI, NICOLA, FORNASIERO, EMANUELE
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IEEE Transactions on Magnetics, 2012
This paper proposed a semi-analytical method for calculating eddy-currents losses in an inner-rotor type axial flux permanent magnet machine (AFPM), which have surface-mounted PM rotor structure and inserted PM rotor structure. The fractional slot concentrated winding has large amount of magneto-motive force (MMF) harmonics, which induce extra eddy ...
Jian Li +3 more
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This paper proposed a semi-analytical method for calculating eddy-currents losses in an inner-rotor type axial flux permanent magnet machine (AFPM), which have surface-mounted PM rotor structure and inserted PM rotor structure. The fractional slot concentrated winding has large amount of magneto-motive force (MMF) harmonics, which induce extra eddy ...
Jian Li +3 more
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Current Harmonics in Induction Machine With Closed-Slot Rotor
IEEE Transactions on Industry Applications, 2015Usually an induction machine with closed slots on rotor has lower harmonics in line currents than that with open slots. However, in this paper, finite element analysis shows that some induction motors with single-layer windings may have an opposite characteristic, say, such motors with closed slots exhibit significant 5th- and 7th-order harmonics. This
null Gui-Yu Zhou, null Jian-Xin Shen
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Rotor slot harmonics based induction machine speed estimation
2017 International Symposium on Power Electronics (Ee), 2017Some of the most common types of electrical drives imply the use of induction machines as their integral part. Making use of the economically most viable solution, the researchers have always strived to increase the reliability of such drives, while constantly trying to decrease maintenance cost.
Popadic Bane +4 more
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Advanced model of IM including rotor slot harmonics
COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 2015Purpose – The purpose of this paper is to present a detailed advanced dynamical model of induction machine (IM) with unskewed rotor bars, including rotor slot harmonics. Design/methodology/approach – Procedure of IM modeling using results from finite element ...
Dejan Jerkan, Darko Marčetić
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Higher order rotor slot harmonics for rotor speed & position estimation
2010 12th International Conference on Optimization of Electrical and Electronic Equipment, 2010Air-gap flux of all electrical machines contains harmonics. Some of these harmonics stem from rotor slotting of the machine. These harmonics can be utilized for control or diagnostic purposes. In the literature, rotor slot harmonics are mostly utilized for condition monitoring.
Ozan Keysan, H. Bulent Ertan
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Speed & position estimation by demodulating rotor slot harmonics
The XIX International Conference on Electrical Machines - ICEM 2010, 2010It is well known that slotting harmonics exist in most of the electrical machines. These harmonics may supply valuable information for condition monitoring of bearings, windings or rotor bars. Utilization of these harmonics for rotor speed and position estimation is limited mainly due to long sampling periods required by spectral estimation techniques.
Ozan Keysan, H. Bulent Ertan
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