Murat Tezcan - Academia.edu (original) (raw)

Papers by Murat Tezcan

International Review of Electrical Engineering-iree, 2013

Examining a failed induction motor is a complex problem. It is very important to monitor inductio... more Examining a failed induction motor is a complex problem. It is very important to monitor induction motor faults such as broken rotor bar or end ring fault under the laboratory conditions. Since such faults do not frequently occur, they have to be created by the researcher himself or herself. Induction motor rotor bar faults are generally created by drilling holes to the rotor bars or to the end rings. Transient analyses are carried out both for the faulted and healthy conditions. In this study, an experimental test bed was developed to examine the experienced broken rotor bar faults for induction motors. By using the developed test bed, all possible combinations of broken rotor bar faults can be created. This test bed can successfully be used to model different fault types. In the case of broken rotor bar faults, extensive examination of motor behaviors for training purposes will also be possible. Also for faulted and healthy conditions by performing no-load and blocked rotor test ...

Electric Power Components and Systems, 2017

Abstract Fast and accurate electromagnetic torque calculation of unconventional Permanent Magnet ... more Abstract Fast and accurate electromagnetic torque calculation of unconventional Permanent Magnet Synchronous Machines (PMSMs) is very important in order to reduce design effort. Dual winding PMSMs (DWPMSMs) can be categorized as unconventional and commonly available fast design software that usually lacks predicting machine performance. In this study, an analytical modeling approach has been proposed to calculate electromagnetic torque of DWPMSMs, which has motor and generator windings in a single stator core. Conformal mapping is used for the calculation of flux levels at various locations in the machine. Radial and tangential components of flux densities due to magnet and winding are determined analytically. Instantaneous value of electromagnetic torque due to generator or motor windings is calculated by integrating the Maxwell stress tensor in the middle of the air gap. Accuracy of the proposed analytical solution is confirmed with finite element analysis results. For further validation, an experimental setup with a 24-slot 22-pole DWPMSM is used. Experimental results have close agreement with analytical results obtained by conformal transform-based modeling.

2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012

This paper presents design and analysis performed for a dual winding electric machine. Windings o... more This paper presents design and analysis performed for a dual winding electric machine. Windings of the machine are concentrated type so that electrical and magnetic isolation is maintained. For this reason, the proposed structure could be a reasonable candidate for fault tolerant applications. As required by some applications (electric accessory drive system (EADS) for hybrid electric vehicles), simultaneous motoring and generating operations can be implemented in a single housing of electric machine. Design considerations of the proposed electric machine are outlined in the paper. Also a comparison between distributed winding topology and concentrated winding topologies is performed. Finally experimental results discussed.

2018 6th International Conference on Control Engineering & Information Technology (CEIT), 2018

Permanent Magnet Synchronous Machines (PMSMs) are getting popular in the automotive applications ... more Permanent Magnet Synchronous Machines (PMSMs) are getting popular in the automotive applications which are necessary for high power density in low volumes. Also they have a huge usage potential in other industrial applications like robotics, naval applications, space applications etc. In this paper, design parameters of a special PMSM are analyzed which has two independent winding set for motor and generator operations in a simple stator instead of two separate electrical machine. Important design parameters like skew, airgap length, slot-pole combination, magnet height-width which affect the output performance are investigated for multi tasked PMSM. Performance output values are analyzed for two operation situation of multitasked PMSM and optimum design values are determined. These values are obtained from Maxwell-Simplorer softwares where co-simulation analysis has been run.

2013 3rd International Conference on Electric Power and Energy Conversion Systems, 2013

ABSTRACT In this paper, converter options for an automotive class permanent magnet synchronous ge... more ABSTRACT In this paper, converter options for an automotive class permanent magnet synchronous generator (PMSG) are investigated. There are two options to rectify and regulate voltage from AC to DC. These are uncontrolled rectifier/dc-dc converter and controlled rectifier. Each converter topologies are explained and their comparison is performed. The comparison considers generator apparent power, efficiency, power flow ad cost. As far as converter effects on the generator apparent power rating and system efficiency are concerned, uncontrolled rectifier/dc-dc converter seems to be superior. On the other hand, controlled rectifier option has cost advantage over uncontrolled rectifier/dc-dc converter topology. A tradeoff exists between converter cost and PMSG utilization while making decision between two topologies.

Bu makalede serbest duysal osteokutanoz fibula flebi ile falloplasti yapilan bir transseksuel olg... more Bu makalede serbest duysal osteokutanoz fibula flebi ile falloplasti yapilan bir transseksuel olgu sunulmustur. Uygulanan teknigin seciminde hastanin tercihi ve beklentileri de dikkate alinmistir. Ameliyatin tek oturumlu olmasi, uzun ve guvenilir damar pedikulu, icerdigi kemik bileseni sayesinde cinsel birlesme icin gerekli olan sertligi tasimasi, yeni penisin duysal karakter kazanabilmesi, verici olanin gizlenebilir ve morbiditesinin goreceli olarak az olmasi teknigin avantajlari olarak siralanabilir. Olgu 8 ay sure ile izlenmis olup, erken ve gec donemde flebe ve verici alana ait sorun gorulmemistir.

Concentrated windings, in other words fractional slot windings are getting popular because of man... more Concentrated windings, in other words fractional slot windings are getting popular because of many proven advantages. In this study, a concentrated winding electric machine is designed for industrial applications. Although, in concentrated winding, mutual coupling between two adjacent coils is assumed to be zero, finite element analysis indicates that significant coupling may exist. Studies indicate that the coupling phenomena degrades fault tolerant capabilities of the concentrated winding structure. This paper, first, investigates the existence of mutual coupling then presents a new concentrated winding structure which still exploits benefits of conventional concentrated winding.

Electric Power Systems Research, 2016

International Journal of Vehicle Design, 2015

The history of faults in electric motors is nearly the same age as the history of electric motors... more The history of faults in electric motors is nearly the same age as the history of electric motors. In the beginning, producers and users were considering simple solutions in the presence of faults. These were rather dealt with excessive current protection, voltage regulator or taking grounding precautions. However, identification of the faults and solutions of the problems are getting more difficult in parallel with the developments of electric motors and increase in the type of effects that occur. In view of these faults, the financial losses of the businesses are growing. Therefore, rapid identification of faults and intervention to the faults has become important. In squirrel-cage asynchronous motors, the type of fault that is generally encountered in dense labor conditions are the faults of broken rotor bars. Modeling this type of fault in computer environment and analysis of the solutions of twodimensional finite elements of the motor according to the type of fault forms the ba...

This paper introduces design and analysis performed for a dual winding electric machine that oper... more This paper introduces design and analysis performed for a dual winding electric machine that operates both motor and generator mode. The proposed structure could be a considerable choice for multitasking operation and fault tolerant applications. Motor and generator windings of the electric machine are located on the same stator core. Windings are concentrated type so that electrical and magnetic isolation is maintained. With the proposed technique, simultaneous motoring and generating operations can be implemented in the single housing of electric machine. This structure provides low volume, low mass and low inertia for industrial applications. It also provides economical benefit compared to using separate motor and generator. Design considerations of the proposed electric machine are outlined in the paper. Also a comparison between distributed winding topology and concentrated winding topologies is performed. Finally experimental results are discussed.

In this paper, an algorithm for three-phase induction motor's design and calculation of equiv... more In this paper, an algorithm for three-phase induction motor's design and calculation of equivalent circuit parameters and performance characteristics was introduced. Using this algorithm, an induction motor can be designed for various rotor and stator slot geometries giving nameplate data and magnetic flux densities for used materials. For obtained geometries, equivalent circuit parameters was calculated and compared with open and

2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012

This paper presents design and analysis performed for a dual winding electric machine. Windings o... more This paper presents design and analysis performed for a dual winding electric machine. Windings of the machine are concentrated type so that electrical and magnetic isolation is maintained. For this reason, the proposed structure could be a reasonable candidate for fault tolerant applications. As required by some applications (electric accessory drive system (EADS) for hybrid electric vehicles), simultaneous motoring and generating operations can be implemented in a single housing of electric machine. Design considerations of the proposed electric machine are outlined in the paper. Also a comparison between distributed winding topology and concentrated winding topologies is performed. Finally experimental results discussed.

In faulty working conditions, precise analysis of an induction motor is a complex problem. In thi... more In faulty working conditions, precise analysis of an induction motor is a complex problem. In this study, thanks to experimental methods, which are committed to these methods, indications of rotor failures in induction machines are investigated. Thanks to the experimental set, which is developed to monitor the failures in a laboratory environment and to record in the failures occurred in the rotor, a sharper impression can be gained concerning whether the simulations made are veridical or not. Regarding the experiments made, the performance of induction motor in the case of various broken rotor bars is monitored and thus the opportunity of comparing it to the rates that are taken in healthy working conditions is seized. Finally, it can be intended to model the changes that may occur in an induction motor at some point in rotor failures, which may happen in industry. 1. Giriş

2013 3rd International Conference on Electric Power and Energy Conversion Systems, 2013

In this paper, converter options for an automotive class permanent magnet synchronous generator (... more In this paper, converter options for an automotive class permanent magnet synchronous generator (pMSG) are investigated. There are two options to rectify and regulate voltage from AC to DC. These are uncontrolled rectifier/dc-dc converter and controlled rectifier. Each converter topologies are explained and their comparison is performed. The comparison considers generator apparent power, efficiency, power flow ad cost.

International Review of Electrical Engineering-iree, 2013

Examining a failed induction motor is a complex problem. It is very important to monitor inductio... more Examining a failed induction motor is a complex problem. It is very important to monitor induction motor faults such as broken rotor bar or end ring fault under the laboratory conditions. Since such faults do not frequently occur, they have to be created by the researcher himself or herself. Induction motor rotor bar faults are generally created by drilling holes to the rotor bars or to the end rings. Transient analyses are carried out both for the faulted and healthy conditions. In this study, an experimental test bed was developed to examine the experienced broken rotor bar faults for induction motors. By using the developed test bed, all possible combinations of broken rotor bar faults can be created. This test bed can successfully be used to model different fault types. In the case of broken rotor bar faults, extensive examination of motor behaviors for training purposes will also be possible. Also for faulted and healthy conditions by performing no-load and blocked rotor test ...

Electric Power Components and Systems, 2017

Abstract Fast and accurate electromagnetic torque calculation of unconventional Permanent Magnet ... more Abstract Fast and accurate electromagnetic torque calculation of unconventional Permanent Magnet Synchronous Machines (PMSMs) is very important in order to reduce design effort. Dual winding PMSMs (DWPMSMs) can be categorized as unconventional and commonly available fast design software that usually lacks predicting machine performance. In this study, an analytical modeling approach has been proposed to calculate electromagnetic torque of DWPMSMs, which has motor and generator windings in a single stator core. Conformal mapping is used for the calculation of flux levels at various locations in the machine. Radial and tangential components of flux densities due to magnet and winding are determined analytically. Instantaneous value of electromagnetic torque due to generator or motor windings is calculated by integrating the Maxwell stress tensor in the middle of the air gap. Accuracy of the proposed analytical solution is confirmed with finite element analysis results. For further validation, an experimental setup with a 24-slot 22-pole DWPMSM is used. Experimental results have close agreement with analytical results obtained by conformal transform-based modeling.

2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012

This paper presents design and analysis performed for a dual winding electric machine. Windings o... more This paper presents design and analysis performed for a dual winding electric machine. Windings of the machine are concentrated type so that electrical and magnetic isolation is maintained. For this reason, the proposed structure could be a reasonable candidate for fault tolerant applications. As required by some applications (electric accessory drive system (EADS) for hybrid electric vehicles), simultaneous motoring and generating operations can be implemented in a single housing of electric machine. Design considerations of the proposed electric machine are outlined in the paper. Also a comparison between distributed winding topology and concentrated winding topologies is performed. Finally experimental results discussed.

2018 6th International Conference on Control Engineering & Information Technology (CEIT), 2018

Permanent Magnet Synchronous Machines (PMSMs) are getting popular in the automotive applications ... more Permanent Magnet Synchronous Machines (PMSMs) are getting popular in the automotive applications which are necessary for high power density in low volumes. Also they have a huge usage potential in other industrial applications like robotics, naval applications, space applications etc. In this paper, design parameters of a special PMSM are analyzed which has two independent winding set for motor and generator operations in a simple stator instead of two separate electrical machine. Important design parameters like skew, airgap length, slot-pole combination, magnet height-width which affect the output performance are investigated for multi tasked PMSM. Performance output values are analyzed for two operation situation of multitasked PMSM and optimum design values are determined. These values are obtained from Maxwell-Simplorer softwares where co-simulation analysis has been run.

2013 3rd International Conference on Electric Power and Energy Conversion Systems, 2013

ABSTRACT In this paper, converter options for an automotive class permanent magnet synchronous ge... more ABSTRACT In this paper, converter options for an automotive class permanent magnet synchronous generator (PMSG) are investigated. There are two options to rectify and regulate voltage from AC to DC. These are uncontrolled rectifier/dc-dc converter and controlled rectifier. Each converter topologies are explained and their comparison is performed. The comparison considers generator apparent power, efficiency, power flow ad cost. As far as converter effects on the generator apparent power rating and system efficiency are concerned, uncontrolled rectifier/dc-dc converter seems to be superior. On the other hand, controlled rectifier option has cost advantage over uncontrolled rectifier/dc-dc converter topology. A tradeoff exists between converter cost and PMSG utilization while making decision between two topologies.

Bu makalede serbest duysal osteokutanoz fibula flebi ile falloplasti yapilan bir transseksuel olg... more Bu makalede serbest duysal osteokutanoz fibula flebi ile falloplasti yapilan bir transseksuel olgu sunulmustur. Uygulanan teknigin seciminde hastanin tercihi ve beklentileri de dikkate alinmistir. Ameliyatin tek oturumlu olmasi, uzun ve guvenilir damar pedikulu, icerdigi kemik bileseni sayesinde cinsel birlesme icin gerekli olan sertligi tasimasi, yeni penisin duysal karakter kazanabilmesi, verici olanin gizlenebilir ve morbiditesinin goreceli olarak az olmasi teknigin avantajlari olarak siralanabilir. Olgu 8 ay sure ile izlenmis olup, erken ve gec donemde flebe ve verici alana ait sorun gorulmemistir.

Concentrated windings, in other words fractional slot windings are getting popular because of man... more Concentrated windings, in other words fractional slot windings are getting popular because of many proven advantages. In this study, a concentrated winding electric machine is designed for industrial applications. Although, in concentrated winding, mutual coupling between two adjacent coils is assumed to be zero, finite element analysis indicates that significant coupling may exist. Studies indicate that the coupling phenomena degrades fault tolerant capabilities of the concentrated winding structure. This paper, first, investigates the existence of mutual coupling then presents a new concentrated winding structure which still exploits benefits of conventional concentrated winding.

Electric Power Systems Research, 2016

International Journal of Vehicle Design, 2015

The history of faults in electric motors is nearly the same age as the history of electric motors... more The history of faults in electric motors is nearly the same age as the history of electric motors. In the beginning, producers and users were considering simple solutions in the presence of faults. These were rather dealt with excessive current protection, voltage regulator or taking grounding precautions. However, identification of the faults and solutions of the problems are getting more difficult in parallel with the developments of electric motors and increase in the type of effects that occur. In view of these faults, the financial losses of the businesses are growing. Therefore, rapid identification of faults and intervention to the faults has become important. In squirrel-cage asynchronous motors, the type of fault that is generally encountered in dense labor conditions are the faults of broken rotor bars. Modeling this type of fault in computer environment and analysis of the solutions of twodimensional finite elements of the motor according to the type of fault forms the ba...

This paper introduces design and analysis performed for a dual winding electric machine that oper... more This paper introduces design and analysis performed for a dual winding electric machine that operates both motor and generator mode. The proposed structure could be a considerable choice for multitasking operation and fault tolerant applications. Motor and generator windings of the electric machine are located on the same stator core. Windings are concentrated type so that electrical and magnetic isolation is maintained. With the proposed technique, simultaneous motoring and generating operations can be implemented in the single housing of electric machine. This structure provides low volume, low mass and low inertia for industrial applications. It also provides economical benefit compared to using separate motor and generator. Design considerations of the proposed electric machine are outlined in the paper. Also a comparison between distributed winding topology and concentrated winding topologies is performed. Finally experimental results are discussed.

In this paper, an algorithm for three-phase induction motor's design and calculation of equiv... more In this paper, an algorithm for three-phase induction motor's design and calculation of equivalent circuit parameters and performance characteristics was introduced. Using this algorithm, an induction motor can be designed for various rotor and stator slot geometries giving nameplate data and magnetic flux densities for used materials. For obtained geometries, equivalent circuit parameters was calculated and compared with open and

2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012

This paper presents design and analysis performed for a dual winding electric machine. Windings o... more This paper presents design and analysis performed for a dual winding electric machine. Windings of the machine are concentrated type so that electrical and magnetic isolation is maintained. For this reason, the proposed structure could be a reasonable candidate for fault tolerant applications. As required by some applications (electric accessory drive system (EADS) for hybrid electric vehicles), simultaneous motoring and generating operations can be implemented in a single housing of electric machine. Design considerations of the proposed electric machine are outlined in the paper. Also a comparison between distributed winding topology and concentrated winding topologies is performed. Finally experimental results discussed.

In faulty working conditions, precise analysis of an induction motor is a complex problem. In thi... more In faulty working conditions, precise analysis of an induction motor is a complex problem. In this study, thanks to experimental methods, which are committed to these methods, indications of rotor failures in induction machines are investigated. Thanks to the experimental set, which is developed to monitor the failures in a laboratory environment and to record in the failures occurred in the rotor, a sharper impression can be gained concerning whether the simulations made are veridical or not. Regarding the experiments made, the performance of induction motor in the case of various broken rotor bars is monitored and thus the opportunity of comparing it to the rates that are taken in healthy working conditions is seized. Finally, it can be intended to model the changes that may occur in an induction motor at some point in rotor failures, which may happen in industry. 1. Giriş

2013 3rd International Conference on Electric Power and Energy Conversion Systems, 2013

In this paper, converter options for an automotive class permanent magnet synchronous generator (... more In this paper, converter options for an automotive class permanent magnet synchronous generator (pMSG) are investigated. There are two options to rectify and regulate voltage from AC to DC. These are uncontrolled rectifier/dc-dc converter and controlled rectifier. Each converter topologies are explained and their comparison is performed. The comparison considers generator apparent power, efficiency, power flow ad cost.