EPE Association: EPE 2013 - DS3d: Synchronous, Permanent Magnet Synchronous and Brushless DC motors

EPE 2013 - DS3d: Synchronous, Permanent Magnet Synchronous and Brushless DC motors
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 10: Electrical machines > EPE 2013 - DS3d: Synchronous, Permanent Magnet Synchronous and Brushless DC motors

   [return to parent folder]

   An adaptive incremental predictive current control method of PMSM
By Weihua WANG, Xi XIAO, Youshuang DING [View]
[Download]

Abstract: An incremental predictive current control method of PMSM is presented, where two adjacent prediction models are subtracted to eliminate back EMF items. It is promising to realize the fastest dynamic response while just one parameter of motor, the q-axis inductance, is needed. Parameter stability analysis of the method is carried out in discrete domain. The result shows that the stable range is not wide enough, which leads that the predictive algorithm is difficult to be adopted in practical applications. To overcome this problem, an online identification method of q-axis inductance based on incremental mode of MRAS is proposed to eliminate the interference of parameter mismatch. Simulation results verify the feasibility of the methods proposed.

   An Error Compensation Method of Position Sensors for Cylindrical Linear Motors without Any Additional Sensors
By Toshiya YOSHIDA, Osamu MIYASHITA, Yuki KOBAYASHI [View]
[Download]

Abstract: A new method for compensating position error of the Hall-element linear position sensors equipped in a cylindrical linear motor is proposed. The compensation is characterized by the filtered position signal processing when the mover is driven at a constant speed at preliminary test. An additional linear scale is not required. The method is verified by experiment.

   Analytical Approach for Optimal Design of a Line-Start Internal Permanent Magnet Synchronous Motor
By Vera ELISTRATOVA, Michel HECQUET, Pascal BROCHET, Darius VIZIREANU, Maxime DESSOUDE [View]
[Download]

Abstract: The work described in this paper deals with the analytical design and optimization of a line-start permanent magnet synchronous motor (LSPM) with a series magnetic circuit structure. The design approach considers a LSPM as an induction motor (IM) combined with a permanent magnet rotor arrangement and takes into account the characteristics of both asynchronous and synchronous regimes.

   Analytical Modeling of Balanced and Unbalanced Short-Circuits of SMPM Motors – Analyses of Currents, Torque and PM Eddy-Current Losses
By Mohand SOUGH, Christophe ESPANET, Benali BOUALEM, Frederic DUBAS, Daniel DEPERNET [View]
[Download]

Abstract: In this paper, the authors present an analytical modeling of short-circuit currents, corresponding electromagnetic torque and permanent-magnet (PM) eddy-current losses to resistance-limited (i.e., without eddy-current reaction field) during fault operations. Three short-circuits types are considered: on the one hand balanced three-phase short-circuit, and on the other hand unbalanced two-phase and asymmetrical short-circuits. The main results of this work are the time evolution of short-circuit currents and corresponding torque reinforced by numerical and experimental validation. Moreover, using Fortescue transformation the permanent-magnet losses are calculated during unbalanced short circuit.

   Analytical Modeling of the Magnetic Field in Axial Field Flux-Switching Permanent Magnet Machines at No-Load
By Mouheb DHIFLI, Habiba BALI, Yanis LAOUBI, Georges BARAKAT, Yacine AMARA [View]
[Download]

Abstract: In this paper an analytical model for prediction of the no-load magnetic field in axial field flux switching permanent magnet machines (FSPM) is presented. The proposed method is based on an exact 2D analytical solution of Maxwell’s equations in low permeability regions (stator/rotor slots, air gap, permanent magnets (PMs) and surrounding air regions), using the separation of variables technique. For each region, the magnetic vector potential solution is expressed as a sum of Fourier series. Combining obtained solutions in each region and boundary conditions leads to a set of linear equations which allows calculation of the coefficients of the Fourier series in the different regions. The developed model is validated by comparing magnetic field components for a machine modeled with this analytical model and the finite element method (FEM).

   Axial-flux vs. radial-flux permanent-magnet synchronous generators for micro wind turbine application
By Adrian Augustin POP, Florin JURCA, Claudiu OPREA, Mihai CHIRCA, Stefan BREBAN, Mircea M. RADULESCU [View]
[Download]

Abstract: This paper presents a comparative study between the axial-flux and radial-flux permanent-magnetsynchronous generators for a 3 kW wind turbine application. This study emphasizes the most cost-effectivesolution to be implemented by the industrial partner. There are three constructive types ofelectric generators considered in this work. All are based on permanent-magnet synchronousgenerators (PMSGs), but one has an axial-flux topology, the other one is a radial-flux outer-rotormachine and the third one is a radial-flux inner-rotor machine. Finite-element field analysis was madefor the three PMSGs in order to compare their efficiency and active materials estimated cost. Theresults show that the axial-flux PMSG is the best solution for micro-wind turbine application.

   Calculation of Eddy Current Loss in Permanent Magnet Motor Caused by Carrier Harmonics Based on Reluctance Network Analysis
By Yukihiro YOSHIDA, Kenji NAKAMURA, Osamu ICHINOKURA [View]
[Download]

Abstract: This paper presents a method for calculating eddy current loss in a permanent magnet (PM) of a surface permanent magnet (SPM) motor based on electric and magnetic networks. First, a reluctance network analysis (RNA) model of the SPM motor and coupling between the RNA model and electric network model are described. To take account of the carrier harmonics caused by PWM switching, input current waveforms are calculated by a motor drive circuit. Then, the eddy current loss in the magnet and iron loss in the stator core of the SPM motor including carrier harmonics are calculated by the proposed model.

   Design Using Simple Modeling and Experimental Study on Direct-drive Disk-type Motor with Dense Stator Configuration
By Yuta YAMAMOTO, Ryuji WATANABE, Yasuhiro TAKADA, Takafumi KOSEKI, Yasuaki AOYAMA [View]
[Download]

Abstract: Electric propulsion system in marine application has been given high attention due to energy saving and low maintenance requirements. A transverse flux-type machine (TFM) with permanent magnets (PMs) has been developed as a direct-drive propulsion motor without gearbox called for high torque at low speed and high reliability simultaneously. This manuscript describes design procedure of the TFM using simple modeling focused on magnetic-circuit structure of the motor. The electrical design of the motor is based on electrical and magnetic theory. The minimalist design is shown to be advantageous for effective use in three-dimensional numerical analysis. The validity of the proposed method and the fulfillment of design requirements, torque density defined as torque to total volume ratio of more than 10kNm/m 3 and power factor (PF) of more than 0.80, are verified through the numerical computation and experimental result on a prototype machine. High torque density and high PF contributes to compactness of whole motor-drive system including motor and power converter system.

   Effects of Pole Changing in a Permanent Magnet Motor
By Kazuto SAKAI, Nariaki YUZAWA [View]
[Download]

Abstract: To reduce energy consumption, we developed a technique that varies the number of magnetic poles in a permanent magnet (PM) motor. We propose a PM motor that can change the number of magnetic poles and produce two types of torque. When the motor operates with 8 poles, it produces a PM torque at low speeds. When the motor changes to 4 poles, it produces both PM torque and reluctance torque at high speeds. We explain the principle and basic characteristics of the motor, which has a PM magnetized by the pulse d-axis current of the armature winding. The results of our experiment show that the proposed motor reduces core loss by 49\% or 33\% and triples the speed range of the motor.

   Electrical and mechanical design for a traction motor with tooth coils
By Pia LINDH, Juha PYRHONEN, Ville NAUMANEN, Emil KURVINEN, Maria POLIKARPOVA, Janne HEIKKINEN [View]
[Download]

Abstract: The design process for a permanent magnet (PM) AC traction motor is analyzed here taking both electromagnetic design and mechanical design aspects into account. The traction motor was designed for tooth coil windings. It has embedded permanent magnets for easy manufacture and to satisfy electromagnetic performance requirements. Key mechanical design aspects are introduced, and the most important force characteristics are pointed out. The project culminated with the design, build, and test of a prototype machine, and significant performance measurements are reported here.

   Experimental comparison of small wind turbine vector control with and without position sensor - Extended Kalman Filter application
By Hossam AL-GHOSSINI, Fabrice LOCMENT, Manuela SECHILARIU [View]
[Download]

Abstract: In this paper two vector controls, applied on small wind turbine with permanent magnets synchronousgenerator, with sensor and sensorless, are experimentally validated and compared. The results showthat the performance of sensorless vector control, based on Extended Kalman Filter method, isadequate and economically valuable for small wind turbine.

   High Performance Torque Controller for Wound Field Flux Switching Motor
By Takashi KOSAKA, Yu KUWAHARA, Nobuyuki MATSUI, Yoshinobu KAMADA, Hiroaki KAJIURA [View]
[Download]

Abstract: The EPE’13 – ECCE Europe-team regrets to inform you that this full paper was not uploaded before the finaldeadline. As a consequence, this paper could not be included in these proceedings.

   High-performance PMASynRM with Ferrite Magnet for EV/HEV Applications
By Masahiro OBATA, Shigeo MORIMOTO, Masayuki SANADA, Yukinori INOUE [View]
[Download]

Abstract: Although motors that use rare-earth permanent magnets typically exhibit high performance, high costs and concerns about the stability of raw material supplies can limit production. This paper proposes a permanent-magnet-assisted synchronous reluctance motor (PMASynRM) with ferrite magnets that do not use rare earth materials. The performance of the proposed PMASynRM is evaluated based on the 2-D finite element method and an experiment using a prototype machine. The motor parameters, torque, output power, and efficiency characteristics are discussed. The analysis and experimental results reveal that the proposed PMASynRM has an efficiency equivalent to that of conventional rare-earth permanent magnet synchronous motors used in EV/HEVs.

   Improvement of Characteristics by Flux Barrier Shape and Magnet Thickness of IPMSM with Dy-free Rare-Earth Magnet
By Keigo IMAMURA, Shigeo MORIMOTO, Masayuki SANADA, Yukinori INOUE [View]
[Download]

Abstract: Interior permanent magnet synchronous motors (IPMSMs) that employ rare-earth permanent magnets (PMs) containing dysprosium (Dy) are used in home appliances, electric vehicles and hybrid electric vehicles. However, it is desirable to reduce the amount of Dy used in such PMs due to its high cost. This study investigates the rotor structure of an IPMSM with a Dy-free rare-earth PM. Flux barrier shapes and PM thicknesses that enhance the irreversible demagnetization are investigated. In addition, a rotor structure that improves the irreversible demagnetization is proposed. We demonstrate that the proposed rotor structure without Dy improves the irreversible demagnetization without degrading the motor performance.

   Model elicitation of Interior Permanent Magnet Synchronous Motor Drive by sine source
By David UZEL, Karel ZEMAN, Vaclav SMIDL, Zdenek PEROUTKA [View]
[Download]

Abstract: This paper introduces a survey about model elicitation of interior permanent magnet synchronous motors (IPMSMs). In many cases, the magnetic flux of these motors contains significant higher harmonics due to their real design. From this reason, the classic model in d, q reference frame (Clark-Park transformation, space vectors) doesn’t describe exactly the motor behavior. For motor without damper winding, the model in a, b, c coordinates has been elected and determined. Elicitation was done by several measurements with 1-phase sinusoidal voltage source and scope. The measured and evaluated parameters, which are carried out on developed laboratory prototype of IPMSM by two proposed measure methods, have been shown and compared.

   Modeling and current control of a Double Salient Permanent Magnet Generator (DSPMG)
By Hao CHEN, Mohamed el hadi ZAIM, Mohamed MACHMOUM, Nadia AIT-AHMED, Emmanuel SCHAEFFER [View]
[Download]

Abstract: This paper deals with the modeling and current control of non-conventional electrical machine dedicated to marine tidal current applications. The dynamic modeling of a Double Salient Permanent Magnet Generator, based on the analysis of the flux and inductances characteristics calculated by finite element method is deduced. A simple current control on dq reference frame is tested and simulation results are presented to validate the proposed model and to discuss the appropriate control strategy.

   Optimal Cogging Torque Reduction Design of Dual Stator Radial Flux Permanent Magnet Generator
By Lee GYEONG-CHAN, Jung TAE UK [View]
[Download]

Abstract: In this paper, the design of the electromagnetic structure of the dual stator type radial flux permanent magnet generator, which has an advantage over the axial flux permanent magnet generator, has been discussed from the perspective of reducing the cogging torque. To reduce the cogging torque, firstly, stator tooth pairing was designed; secondly, permanent magnet displacement was designed, and finally, stator tooth pairing and permanent magnet displacement were carried out simultaneously. The dual stator radial flux permanent magnet generator in this study was analyzed by the two-dimensional finite element method.

   Performance Analysis of Windings Configuration of Fractional-Slots PMSM for Embedded Applications
By Hussein DOGAN, Albert FOGGIA, Frédéric WURTZ, Lauric GARBUIO [View]
[Download]

Abstract: During the first steps of machines design, engineers have to choose the topology the most appropriate to the specifications. The topology includes the number of stator’s slots, the number of rotor’s poles and the winding associated. Traditionally, designers choose one of the common used topology in the industry and consequently, a lot of solutions are not studied. In fact, the performances of the machines are strongly linked to this choice that has to be fully justified. Then, in this paper, a method from the star of slots is presented and also the way to determine the different winding configuration that could exist for each slots/poles combination. An approach to rapidly evaluate the overall performance of Permanent Magnet Synchronous Machines (PMSM) is also used. Thus, designers can perform better choice of the PMSM’s topology regarding the specifications.

   Simple Lumped Parameter Thermal Model with Practical Experimental Fitting Method for Synchronous Reluctance Machine
By Mohd Azri Hizami RASID, Vincent LANFRANCHI, Luis Alejandro OSPINA VARGAS, Khadija EL KADRI BENKARA [View]
[Download]

Abstract: With the ever increasing pressures in automotive industries to develop smaller and more efficient electrical motors for their applications, it becomes necessary to have a thermal model at the design stage. This study proposes a fast, precise and practical thermal model construction that requires minimal development time for a synchronous reluctance machine which is to be used in automotive applications. It uses a method we call “practical experimental fitting method” which corrects a basic and simple thermal model by adding corrector coefficients into the model in order to fit it to experimental results obtained from the first machine prototype.

   Stability Issues of High-Speed PMSM Feedback Control Systems
By Zdenek NOVAK, Martin NOVAK [View]
[Download]

Abstract: CZ68407700

   The issues of multiple-pole cylindrical rotor synchronous machine excitation winding
By Karel HRUSKA, Vladimir KINDL, Roman PECHANEK [View]
[Download]

Abstract: The paper deals with problems of cylindrical rotor synchronous machine excitation winding, its design and analyses of resulting excitation magnetic field. Furthermore it includes possibilities of suppression of harmonic components using suitable stator winding topology.

   Vibration behaviour of the asynchronous machine magnetic core
By Lukas BOUZEK, Roman PECHANEK [View]
[Download]

Abstract: This paper deals with the effect of laminations on natural frequencies of asynchronous machinemagnetic core. Measurement of natural frequency of stator core is presented. Numerical model andcalculation of natural frequency of core is described in next part. Comparison of measurement andmathematical model is discussed.

EPE 2013 - DS3d: Synchronous, Permanent Magnet Synchronous and Brushless DC motors
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 10: Electrical machines > EPE 2013 - DS3d: Synchronous, Permanent Magnet Synchronous and Brushless DC motors
	[return to parent folder]

	An adaptive incremental predictive current control method of PMSM By Weihua WANG, Xi XIAO, Youshuang DING	[View] [Download]
Abstract: An incremental predictive current control method of PMSM is presented, where two adjacent prediction models are subtracted to eliminate back EMF items. It is promising to realize the fastest dynamic response while just one parameter of motor, the q-axis inductance, is needed. Parameter stability analysis of the method is carried out in discrete domain. The result shows that the stable range is not wide enough, which leads that the predictive algorithm is difficult to be adopted in practical applications. To overcome this problem, an online identification method of q-axis inductance based on incremental mode of MRAS is proposed to eliminate the interference of parameter mismatch. Simulation results verify the feasibility of the methods proposed.

	An Error Compensation Method of Position Sensors for Cylindrical Linear Motors without Any Additional Sensors By Toshiya YOSHIDA, Osamu MIYASHITA, Yuki KOBAYASHI	[View] [Download]
Abstract: A new method for compensating position error of the Hall-element linear position sensors equipped in a cylindrical linear motor is proposed. The compensation is characterized by the filtered position signal processing when the mover is driven at a constant speed at preliminary test. An additional linear scale is not required. The method is verified by experiment.

	Analytical Approach for Optimal Design of a Line-Start Internal Permanent Magnet Synchronous Motor By Vera ELISTRATOVA, Michel HECQUET, Pascal BROCHET, Darius VIZIREANU, Maxime DESSOUDE	[View] [Download]
Abstract: The work described in this paper deals with the analytical design and optimization of a line-start permanent magnet synchronous motor (LSPM) with a series magnetic circuit structure. The design approach considers a LSPM as an induction motor (IM) combined with a permanent magnet rotor arrangement and takes into account the characteristics of both asynchronous and synchronous regimes.

	Analytical Modeling of Balanced and Unbalanced Short-Circuits of SMPM Motors – Analyses of Currents, Torque and PM Eddy-Current Losses By Mohand SOUGH, Christophe ESPANET, Benali BOUALEM, Frederic DUBAS, Daniel DEPERNET	[View] [Download]
Abstract: In this paper, the authors present an analytical modeling of short-circuit currents, corresponding electromagnetic torque and permanent-magnet (PM) eddy-current losses to resistance-limited (i.e., without eddy-current reaction field) during fault operations. Three short-circuits types are considered: on the one hand balanced three-phase short-circuit, and on the other hand unbalanced two-phase and asymmetrical short-circuits. The main results of this work are the time evolution of short-circuit currents and corresponding torque reinforced by numerical and experimental validation. Moreover, using Fortescue transformation the permanent-magnet losses are calculated during unbalanced short circuit.

	Analytical Modeling of the Magnetic Field in Axial Field Flux-Switching Permanent Magnet Machines at No-Load By Mouheb DHIFLI, Habiba BALI, Yanis LAOUBI, Georges BARAKAT, Yacine AMARA	[View] [Download]
Abstract: In this paper an analytical model for prediction of the no-load magnetic field in axial field flux switching permanent magnet machines (FSPM) is presented. The proposed method is based on an exact 2D analytical solution of Maxwell’s equations in low permeability regions (stator/rotor slots, air gap, permanent magnets (PMs) and surrounding air regions), using the separation of variables technique. For each region, the magnetic vector potential solution is expressed as a sum of Fourier series. Combining obtained solutions in each region and boundary conditions leads to a set of linear equations which allows calculation of the coefficients of the Fourier series in the different regions. The developed model is validated by comparing magnetic field components for a machine modeled with this analytical model and the finite element method (FEM).

	Axial-flux vs. radial-flux permanent-magnet synchronous generators for micro wind turbine application By Adrian Augustin POP, Florin JURCA, Claudiu OPREA, Mihai CHIRCA, Stefan BREBAN, Mircea M. RADULESCU	[View] [Download]
Abstract: This paper presents a comparative study between the axial-flux and radial-flux permanent-magnetsynchronous generators for a 3 kW wind turbine application. This study emphasizes the most cost-effectivesolution to be implemented by the industrial partner. There are three constructive types ofelectric generators considered in this work. All are based on permanent-magnet synchronousgenerators (PMSGs), but one has an axial-flux topology, the other one is a radial-flux outer-rotormachine and the third one is a radial-flux inner-rotor machine. Finite-element field analysis was madefor the three PMSGs in order to compare their efficiency and active materials estimated cost. Theresults show that the axial-flux PMSG is the best solution for micro-wind turbine application.

	Calculation of Eddy Current Loss in Permanent Magnet Motor Caused by Carrier Harmonics Based on Reluctance Network Analysis By Yukihiro YOSHIDA, Kenji NAKAMURA, Osamu ICHINOKURA	[View] [Download]
Abstract: This paper presents a method for calculating eddy current loss in a permanent magnet (PM) of a surface permanent magnet (SPM) motor based on electric and magnetic networks. First, a reluctance network analysis (RNA) model of the SPM motor and coupling between the RNA model and electric network model are described. To take account of the carrier harmonics caused by PWM switching, input current waveforms are calculated by a motor drive circuit. Then, the eddy current loss in the magnet and iron loss in the stator core of the SPM motor including carrier harmonics are calculated by the proposed model.

	Design Using Simple Modeling and Experimental Study on Direct-drive Disk-type Motor with Dense Stator Configuration By Yuta YAMAMOTO, Ryuji WATANABE, Yasuhiro TAKADA, Takafumi KOSEKI, Yasuaki AOYAMA	[View] [Download]
Abstract: Electric propulsion system in marine application has been given high attention due to energy saving and low maintenance requirements. A transverse flux-type machine (TFM) with permanent magnets (PMs) has been developed as a direct-drive propulsion motor without gearbox called for high torque at low speed and high reliability simultaneously. This manuscript describes design procedure of the TFM using simple modeling focused on magnetic-circuit structure of the motor. The electrical design of the motor is based on electrical and magnetic theory. The minimalist design is shown to be advantageous for effective use in three-dimensional numerical analysis. The validity of the proposed method and the fulfillment of design requirements, torque density defined as torque to total volume ratio of more than 10kNm/m 3 and power factor (PF) of more than 0.80, are verified through the numerical computation and experimental result on a prototype machine. High torque density and high PF contributes to compactness of whole motor-drive system including motor and power converter system.

	Effects of Pole Changing in a Permanent Magnet Motor By Kazuto SAKAI, Nariaki YUZAWA	[View] [Download]
Abstract: To reduce energy consumption, we developed a technique that varies the number of magnetic poles in a permanent magnet (PM) motor. We propose a PM motor that can change the number of magnetic poles and produce two types of torque. When the motor operates with 8 poles, it produces a PM torque at low speeds. When the motor changes to 4 poles, it produces both PM torque and reluctance torque at high speeds. We explain the principle and basic characteristics of the motor, which has a PM magnetized by the pulse d-axis current of the armature winding. The results of our experiment show that the proposed motor reduces core loss by 49\% or 33\% and triples the speed range of the motor.

	Electrical and mechanical design for a traction motor with tooth coils By Pia LINDH, Juha PYRHONEN, Ville NAUMANEN, Emil KURVINEN, Maria POLIKARPOVA, Janne HEIKKINEN	[View] [Download]
Abstract: The design process for a permanent magnet (PM) AC traction motor is analyzed here taking both electromagnetic design and mechanical design aspects into account. The traction motor was designed for tooth coil windings. It has embedded permanent magnets for easy manufacture and to satisfy electromagnetic performance requirements. Key mechanical design aspects are introduced, and the most important force characteristics are pointed out. The project culminated with the design, build, and test of a prototype machine, and significant performance measurements are reported here.

	Experimental comparison of small wind turbine vector control with and without position sensor - Extended Kalman Filter application By Hossam AL-GHOSSINI, Fabrice LOCMENT, Manuela SECHILARIU	[View] [Download]
Abstract: In this paper two vector controls, applied on small wind turbine with permanent magnets synchronousgenerator, with sensor and sensorless, are experimentally validated and compared. The results showthat the performance of sensorless vector control, based on Extended Kalman Filter method, isadequate and economically valuable for small wind turbine.

	High Performance Torque Controller for Wound Field Flux Switching Motor By Takashi KOSAKA, Yu KUWAHARA, Nobuyuki MATSUI, Yoshinobu KAMADA, Hiroaki KAJIURA	[View] [Download]
Abstract: The EPE’13 – ECCE Europe-team regrets to inform you that this full paper was not uploaded before the finaldeadline. As a consequence, this paper could not be included in these proceedings.

	High-performance PMASynRM with Ferrite Magnet for EV/HEV Applications By Masahiro OBATA, Shigeo MORIMOTO, Masayuki SANADA, Yukinori INOUE	[View] [Download]
Abstract: Although motors that use rare-earth permanent magnets typically exhibit high performance, high costs and concerns about the stability of raw material supplies can limit production. This paper proposes a permanent-magnet-assisted synchronous reluctance motor (PMASynRM) with ferrite magnets that do not use rare earth materials. The performance of the proposed PMASynRM is evaluated based on the 2-D finite element method and an experiment using a prototype machine. The motor parameters, torque, output power, and efficiency characteristics are discussed. The analysis and experimental results reveal that the proposed PMASynRM has an efficiency equivalent to that of conventional rare-earth permanent magnet synchronous motors used in EV/HEVs.

	Improvement of Characteristics by Flux Barrier Shape and Magnet Thickness of IPMSM with Dy-free Rare-Earth Magnet By Keigo IMAMURA, Shigeo MORIMOTO, Masayuki SANADA, Yukinori INOUE	[View] [Download]
Abstract: Interior permanent magnet synchronous motors (IPMSMs) that employ rare-earth permanent magnets (PMs) containing dysprosium (Dy) are used in home appliances, electric vehicles and hybrid electric vehicles. However, it is desirable to reduce the amount of Dy used in such PMs due to its high cost. This study investigates the rotor structure of an IPMSM with a Dy-free rare-earth PM. Flux barrier shapes and PM thicknesses that enhance the irreversible demagnetization are investigated. In addition, a rotor structure that improves the irreversible demagnetization is proposed. We demonstrate that the proposed rotor structure without Dy improves the irreversible demagnetization without degrading the motor performance.

	Model elicitation of Interior Permanent Magnet Synchronous Motor Drive by sine source By David UZEL, Karel ZEMAN, Vaclav SMIDL, Zdenek PEROUTKA	[View] [Download]
Abstract: This paper introduces a survey about model elicitation of interior permanent magnet synchronous motors (IPMSMs). In many cases, the magnetic flux of these motors contains significant higher harmonics due to their real design. From this reason, the classic model in d, q reference frame (Clark-Park transformation, space vectors) doesn’t describe exactly the motor behavior. For motor without damper winding, the model in a, b, c coordinates has been elected and determined. Elicitation was done by several measurements with 1-phase sinusoidal voltage source and scope. The measured and evaluated parameters, which are carried out on developed laboratory prototype of IPMSM by two proposed measure methods, have been shown and compared.

	Modeling and current control of a Double Salient Permanent Magnet Generator (DSPMG) By Hao CHEN, Mohamed el hadi ZAIM, Mohamed MACHMOUM, Nadia AIT-AHMED, Emmanuel SCHAEFFER	[View] [Download]
Abstract: This paper deals with the modeling and current control of non-conventional electrical machine dedicated to marine tidal current applications. The dynamic modeling of a Double Salient Permanent Magnet Generator, based on the analysis of the flux and inductances characteristics calculated by finite element method is deduced. A simple current control on dq reference frame is tested and simulation results are presented to validate the proposed model and to discuss the appropriate control strategy.

	Optimal Cogging Torque Reduction Design of Dual Stator Radial Flux Permanent Magnet Generator By Lee GYEONG-CHAN, Jung TAE UK	[View] [Download]
Abstract: In this paper, the design of the electromagnetic structure of the dual stator type radial flux permanent magnet generator, which has an advantage over the axial flux permanent magnet generator, has been discussed from the perspective of reducing the cogging torque. To reduce the cogging torque, firstly, stator tooth pairing was designed; secondly, permanent magnet displacement was designed, and finally, stator tooth pairing and permanent magnet displacement were carried out simultaneously. The dual stator radial flux permanent magnet generator in this study was analyzed by the two-dimensional finite element method.

	Performance Analysis of Windings Configuration of Fractional-Slots PMSM for Embedded Applications By Hussein DOGAN, Albert FOGGIA, Frédéric WURTZ, Lauric GARBUIO	[View] [Download]
Abstract: During the first steps of machines design, engineers have to choose the topology the most appropriate to the specifications. The topology includes the number of stator’s slots, the number of rotor’s poles and the winding associated. Traditionally, designers choose one of the common used topology in the industry and consequently, a lot of solutions are not studied. In fact, the performances of the machines are strongly linked to this choice that has to be fully justified. Then, in this paper, a method from the star of slots is presented and also the way to determine the different winding configuration that could exist for each slots/poles combination. An approach to rapidly evaluate the overall performance of Permanent Magnet Synchronous Machines (PMSM) is also used. Thus, designers can perform better choice of the PMSM’s topology regarding the specifications.

	Simple Lumped Parameter Thermal Model with Practical Experimental Fitting Method for Synchronous Reluctance Machine By Mohd Azri Hizami RASID, Vincent LANFRANCHI, Luis Alejandro OSPINA VARGAS, Khadija EL KADRI BENKARA	[View] [Download]
Abstract: With the ever increasing pressures in automotive industries to develop smaller and more efficient electrical motors for their applications, it becomes necessary to have a thermal model at the design stage. This study proposes a fast, precise and practical thermal model construction that requires minimal development time for a synchronous reluctance machine which is to be used in automotive applications. It uses a method we call “practical experimental fitting method” which corrects a basic and simple thermal model by adding corrector coefficients into the model in order to fit it to experimental results obtained from the first machine prototype.

	Stability Issues of High-Speed PMSM Feedback Control Systems By Zdenek NOVAK, Martin NOVAK	[View] [Download]
Abstract: CZ68407700

	The issues of multiple-pole cylindrical rotor synchronous machine excitation winding By Karel HRUSKA, Vladimir KINDL, Roman PECHANEK	[View] [Download]
Abstract: The paper deals with problems of cylindrical rotor synchronous machine excitation winding, its design and analyses of resulting excitation magnetic field. Furthermore it includes possibilities of suppression of harmonic components using suitable stator winding topology.

	Vibration behaviour of the asynchronous machine magnetic core By Lukas BOUZEK, Roman PECHANEK	[View] [Download]
Abstract: This paper deals with the effect of laminations on natural frequencies of asynchronous machinemagnetic core. Measurement of natural frequency of stator core is presented. Numerical model andcalculation of natural frequency of core is described in next part. Comparison of measurement andmathematical model is discussed.