EPE Association: EPE 1999 - Topic 05f: Design and Diagnosis

EPE 1999 - Topic 05f: Design and Diagnosis
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1999 - Conference > EPE 1999 - Topic 05: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 1999 - Topic 05f: Design and Diagnosis

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   A Conceptual Optimal Design of Switched Reluctance Motors under S...
By A. Deihimi; S. Farhangi [View]
[Download]

Abstract: This paper represents the possibility of optimal design and construction of Switched Reluctance (SR) motors along with some constraints governed by similar asynchronous motors. These constraints such as the type of laminated material, the cross-section dimensions of motor and the size of the case and brackets, are considered to use the major portion of the present asynchronous motors production line for the SR motors production. The paper describes an efficient conceptual optimal design procedure for constrained SR motors. Also, a simple approximate magnetic loss calculation method, based on laminated iron loss measurements on Epstein test bench, is introduced to estimate the motor efficiency.

   An Automated Insulation Failure Detection System for Working Indu...
By M. G. Melero; M. F. Cabanas; G. A. Orcajo; J.M. Cano; G.A.Capolino [View]
[Download]

Abstract: The present paper describes a system for detecting interturn shortcircuits in working induction motors using instantaneous motor voltages and currents to obtain a parameter called negative sequence impedance, which is directly related to stator asymmetry. By means of analogue circuits and a PLC a whole system for the supervision of insulation condition is developed to be applied to working induction motors.

   Behaviour of polymide-based insulation systems for inverter-fed traction motors
By L. Egiziano; V. Tucci; C. Petrarca; M. Vitelli [View]
[Download]

Abstract: The considerable harmonic content and sharp commutation pulses occuring in the output wave shapes of modern adjustable speed drives adversely affect the life of the induction motor insulation. The thermal aging is enhanced by the increased dielectric losses caused by the higher order harmonics, whereas the electrical strength of the material is decreased as a result of the more intense partial discharge (PD) activity. In order to understand the failure mechanisms and determine the life performances of several insulation systems adopted in medium voltage traction motors an experimental research has been carried out. In particular, two typical insulation systems based on impregnated polyimide (Kapton) have been subjected to non sinusoidal wave shapes with controlled characteristics. The effects of the applied voltage wave-shapes parameters such as the frequency, slew rate (dv/dt) and voltage peak value are analysed for different material thickness and impregnation resin adopted. The obtained results, by elucidating the factors influencing the insulation duration, provide a useful background for electrical design engineers involved in the development of new generation adjustable speed drives.

   Fault Diagnosis in a Rectifier-Inverter System Used in Variable Speed AC Drives, by the Average Current Park's Vector Approach
By A. M. S. Mendes; A. J. Marques Cardoso [View]
[Download]

Abstract: This paper introduces a new approach, based on the average current Park’s Vector monitoring, at both sides of a rectifier-inverter system used for speed control of three-phase induction motors, for the purposes of on-line fault diagnosis. Both simulation and laboratory tests results demonstrate the effectiveness of the proposed diagnostic technique.

   Modelling Induction Motors for Diagnostic Purposes
By A. Abed; L. Baghli; H. Razik; A. Rezzoug [View]
[Download]

Abstract: The paper presents a mathematical model of a three-phase induction machine, suitable for the simulation of machines behaviour under fault conditions. For on-line diagnostic analysis, various developments have been carried out using a complex model based on circuit theory. Unfortunately, the complexity of such a model makes the diagnostic procedure hard and increases the time of computation. The aim of this paper is to develop a model of induction machine with rotor broken bars which, in spite of its simplicity, is able to provide useful indications for diagnostic purposes. The proposed simulation tool, based on the mesh model analysis of the rotor, uses an extension of Park's transformation method to obtain a d-q model of a faulty rotor cage. The simulation results are in agreement with those obtained by the other complex models.

   Tensile Force and Angular Synchronism Control for Drives
By U. Riefenstahl; N. H. Ha; A. Bannack [View]
[Download]

Abstract: Stranding basketmachines are used to produce all kinds of ropes and cables. The rotating baskets of the machine carry the spools, from which the elastic cores or bundles are removed with defined tensile force. Then the elastic cores or bundles are cabled with selected spin through torsion and finally it is rolled up on spools again. In the project, constructively optimally adapted drive-solutions as well as adaptive procedures should be developed for synchronism and traction-regulation at the machine.

EPE 1999 - Topic 05f: Design and Diagnosis
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1999 - Conference > EPE 1999 - Topic 05: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 1999 - Topic 05f: Design and Diagnosis
	[return to parent folder]

	A Conceptual Optimal Design of Switched Reluctance Motors under S... By A. Deihimi; S. Farhangi	[View] [Download]
Abstract: This paper represents the possibility of optimal design and construction of Switched Reluctance (SR) motors along with some constraints governed by similar asynchronous motors. These constraints such as the type of laminated material, the cross-section dimensions of motor and the size of the case and brackets, are considered to use the major portion of the present asynchronous motors production line for the SR motors production. The paper describes an efficient conceptual optimal design procedure for constrained SR motors. Also, a simple approximate magnetic loss calculation method, based on laminated iron loss measurements on Epstein test bench, is introduced to estimate the motor efficiency.

	An Automated Insulation Failure Detection System for Working Indu... By M. G. Melero; M. F. Cabanas; G. A. Orcajo; J.M. Cano; G.A.Capolino	[View] [Download]
Abstract: The present paper describes a system for detecting interturn shortcircuits in working induction motors using instantaneous motor voltages and currents to obtain a parameter called negative sequence impedance, which is directly related to stator asymmetry. By means of analogue circuits and a PLC a whole system for the supervision of insulation condition is developed to be applied to working induction motors.

	Behaviour of polymide-based insulation systems for inverter-fed traction motors By L. Egiziano; V. Tucci; C. Petrarca; M. Vitelli	[View] [Download]
Abstract: The considerable harmonic content and sharp commutation pulses occuring in the output wave shapes of modern adjustable speed drives adversely affect the life of the induction motor insulation. The thermal aging is enhanced by the increased dielectric losses caused by the higher order harmonics, whereas the electrical strength of the material is decreased as a result of the more intense partial discharge (PD) activity. In order to understand the failure mechanisms and determine the life performances of several insulation systems adopted in medium voltage traction motors an experimental research has been carried out. In particular, two typical insulation systems based on impregnated polyimide (Kapton) have been subjected to non sinusoidal wave shapes with controlled characteristics. The effects of the applied voltage wave-shapes parameters such as the frequency, slew rate (dv/dt) and voltage peak value are analysed for different material thickness and impregnation resin adopted. The obtained results, by elucidating the factors influencing the insulation duration, provide a useful background for electrical design engineers involved in the development of new generation adjustable speed drives.

	Fault Diagnosis in a Rectifier-Inverter System Used in Variable Speed AC Drives, by the Average Current Park's Vector Approach By A. M. S. Mendes; A. J. Marques Cardoso	[View] [Download]
Abstract: This paper introduces a new approach, based on the average current Park’s Vector monitoring, at both sides of a rectifier-inverter system used for speed control of three-phase induction motors, for the purposes of on-line fault diagnosis. Both simulation and laboratory tests results demonstrate the effectiveness of the proposed diagnostic technique.

	Modelling Induction Motors for Diagnostic Purposes By A. Abed; L. Baghli; H. Razik; A. Rezzoug	[View] [Download]
Abstract: The paper presents a mathematical model of a three-phase induction machine, suitable for the simulation of machines behaviour under fault conditions. For on-line diagnostic analysis, various developments have been carried out using a complex model based on circuit theory. Unfortunately, the complexity of such a model makes the diagnostic procedure hard and increases the time of computation. The aim of this paper is to develop a model of induction machine with rotor broken bars which, in spite of its simplicity, is able to provide useful indications for diagnostic purposes. The proposed simulation tool, based on the mesh model analysis of the rotor, uses an extension of Park's transformation method to obtain a d-q model of a faulty rotor cage. The simulation results are in agreement with those obtained by the other complex models.

	Tensile Force and Angular Synchronism Control for Drives By U. Riefenstahl; N. H. Ha; A. Bannack	[View] [Download]
Abstract: Stranding basketmachines are used to produce all kinds of ropes and cables. The rotating baskets of the machine carry the spools, from which the elastic cores or bundles are removed with defined tensile force. Then the elastic cores or bundles are cabled with selected spin through torsion and finally it is rolled up on spools again. In the project, constructively optimally adapted drive-solutions as well as adaptive procedures should be developed for synchronism and traction-regulation at the machine.