Matrix analysis of space harmonics of asymmetrical stator windings

Štěpina, Jaroslav

doi:10.1049/ip-b.1987.0035

Cited by 15 publications

(2 citation statements)

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“…Concentrated winding is well known for subharmonics in its MMF distribution [7]. Although not commonly used, unbalanced distributed winding also suffers from low order MMF harmonic [8,9]. Unbalanced winding is a result of improper slot/pole combination whose major advantage is lower cogging torque.…”

Section: Performance Of the Designmentioning

confidence: 99%

Design of a high performance servo motor for low speed high torque application

Meşe

Yaşa²,

Ertugrul

et al. 2014

2014 International Conference on Electrical Machines (ICEM)

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Design considerations of a direct drive servo motor will be presented in this paper. The application is a turret platform for remote weapon stations where low speed and high torque are the major requirements along with low cogging and pulsating torque. Motor outer envelope dimensions are dictated by the application's geometric restrictions. Design process of other internal dimensions and parameters has been introduced. The sensitivity of the motor performance based on the dimensions has been analyzed. Finite element analysis and experimental results have been provided. The motor has also been compared with an off the shelf motor which can be adopted for the same application. Two designs have identical outer envelope which includes stator outer diameter and active axial length. The main difference between the peculiar and the off the self motor is the winding. They have concentrated and distributed winding respectively. Studies show that two motors have comparable torque constant for rated loading conditions. Under heavy load conditions, designed motor yields higher torque constant. Thermal analysis results also revealed that designed motor has lower temperature rise than off the shelf motor. The paper tries to shed light for the reasons of such performance discrepancies between two motors with the help of finite element and experimental analysis.

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Section: Performance Of the Designmentioning

confidence: 99%

Design of a high performance servo motor for low speed high torque application

Meşe

Yaşa²,

Ertugrul

et al. 2014

2014 International Conference on Electrical Machines (ICEM)

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“…The results are all checked for a high winding factor by two different programmes depending on two different calculation methods [12][13][14][15][16][17].…”

Section: Optimization Softwarementioning

confidence: 99%

Maximum MMF reduction using the Newton Raphson method

Kocabaş¹

2008

The International Conference on Electrical Engineering

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This paper accompanies and complements a related companion paper [1]. Previous contributions have discussed the disturbing effects of space harmonics in induction motors, and several techniques to reduce or eliminate them have been proposed. Since these unwanted effects are produced by the stator winding, it is possible to eliminate or at least to significantly reduce some of the space harmonics, by changing the winding structure that is responsible for producing them. It is shown here that, by regarding the mmf waveform as a stepped function, this can be achieved by optimizing the slot positions and the number of conductors in the slots, using software designed for Matlab, and prepared using the Newton Raphson method. The conventional waveform is analyzed and optimized for convenient numbers of slots, and the necessary mathematical relationships are presented, together with equations for the chosen waveform, and a flow-chart for the associated software.

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Optimale Auslegung von getriebelosen, permanentmagneterregten Windgeneratoren mit Zahnspulenwicklung und massivem Rotorjoch

Erd

Binder

2020

Elektrotech. Inftech.

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ZusammenfassungGetriebelose Windgeneratoren mit Zahnspulen und massivem Rotorjoch sowie der Möglichkeit zum Weiterbetrieb bei teilweisem Umrichterausfall stellen eine besondere Herausforderung in der Auslegung dar. Zunächst wird untersucht, welche Zahnspulenwicklungen im Hinblick auf die zulässigen Rotorverluste geeignet sind. Nachdem entsprechende Wicklungsvarianten gefunden sind, wird die Maschinengeometrie optimiert. Dabei wird das Optimierungspotenzial, welches in den kurzen Wickelköpfen der Zahnspulenmaschine liegt, berücksichtigt. Nach der Optimierung erfolgt eine Nachrechnung der Verlustbilanz und eine Auswertung der magnetischen Geräuschanregung mithilfe von transienten, nichtlinearen Finite-Elemente-Simulationen.

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Matrix analysis of space harmonics of asymmetrical stator windings

Cited by 15 publications

References 0 publications

Design of a high performance servo motor for low speed high torque application

Design of a high performance servo motor for low speed high torque application

Maximum MMF reduction using the Newton Raphson method

Optimale Auslegung von getriebelosen, permanentmagneterregten Windgeneratoren mit Zahnspulenwicklung und massivem Rotorjoch

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