Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449527
A. Credo, L. Di Leonardo, M. D'Andrea, D. Macera
This paper presents different electric motor solutions integrated in primary flight surface actuators for aircraft applications in the field of the so called ‘More Electric Aircraft’ research and development. In particular, the motors have been designed and analyzed with a finite-element study, considering the most severe working-points in terms of thermal conditions and aerodynamic load torque demand, aiming to predict both the performance and the degradation. In addition, magnet-free motor solutions with fault-tolerant capabilities towards possible magnet demagnetization are investigated and compared in the same critical conditions. The comparison between the different motor typologies is carried out considering the thermal issues, the behavior of the motor with respect to the faults, the electromagnetic performances, and the necessity to have a market competitive product.
{"title":"Analysis of electric motor alternatives for Primary Flight Surface Actuators","authors":"A. Credo, L. Di Leonardo, M. D'Andrea, D. Macera","doi":"10.1109/IEMDC47953.2021.9449527","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449527","url":null,"abstract":"This paper presents different electric motor solutions integrated in primary flight surface actuators for aircraft applications in the field of the so called ‘More Electric Aircraft’ research and development. In particular, the motors have been designed and analyzed with a finite-element study, considering the most severe working-points in terms of thermal conditions and aerodynamic load torque demand, aiming to predict both the performance and the degradation. In addition, magnet-free motor solutions with fault-tolerant capabilities towards possible magnet demagnetization are investigated and compared in the same critical conditions. The comparison between the different motor typologies is carried out considering the thermal issues, the behavior of the motor with respect to the faults, the electromagnetic performances, and the necessity to have a market competitive product.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114370395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449493
Jiseon Park, R. Tsunata, M. Takemoto, K. Orikawa, S. Ogasawara
NdFeB permanent magnets (Nd-PM) can achieve a coercivity of up to 21 kOe without dysprosium due to the development of manufacturing technology. However, due to the high-temperature operation characteristics of vehicle traction motors, Nd-PM over 25kOe is mainly applied. In this paper, 21kOe Nd-PM and 5.5kOe ferrite-PM (Fe-PM) are simultaneously applied, and a hybrid PM motor (HPMM) suitable for environmental temperature conditions of vehicle traction motors is proposed. HPMM is divided into serial configuration and parallel configuration according to the arrangement of each PM. This paper compares the pros and cons of each configuration and presents rotor structures that can improve demagnetization durability and torque characteristics. After comparing the performance characteristics of each rotor structure through 2D-FEM, finally, an HPMM suitable for vehicle traction motors is proposed. Also, the proposed HPMM shows the same torque and power density as the traction motor of TOYOTA PRIUS 4th-generation hybrid electric vehicle (HEV), the target motor. At the same time, the proposed HPMM reduced the usage of Nd-PM by 47% and the total PM cost by 10% compared to the target motor.
{"title":"Investigation of Dy-Free Hybrid PM Motor Based on Spoke-Type Rotor for Automotive Applications","authors":"Jiseon Park, R. Tsunata, M. Takemoto, K. Orikawa, S. Ogasawara","doi":"10.1109/IEMDC47953.2021.9449493","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449493","url":null,"abstract":"NdFeB permanent magnets (Nd-PM) can achieve a coercivity of up to 21 kOe without dysprosium due to the development of manufacturing technology. However, due to the high-temperature operation characteristics of vehicle traction motors, Nd-PM over 25kOe is mainly applied. In this paper, 21kOe Nd-PM and 5.5kOe ferrite-PM (Fe-PM) are simultaneously applied, and a hybrid PM motor (HPMM) suitable for environmental temperature conditions of vehicle traction motors is proposed. HPMM is divided into serial configuration and parallel configuration according to the arrangement of each PM. This paper compares the pros and cons of each configuration and presents rotor structures that can improve demagnetization durability and torque characteristics. After comparing the performance characteristics of each rotor structure through 2D-FEM, finally, an HPMM suitable for vehicle traction motors is proposed. Also, the proposed HPMM shows the same torque and power density as the traction motor of TOYOTA PRIUS 4th-generation hybrid electric vehicle (HEV), the target motor. At the same time, the proposed HPMM reduced the usage of Nd-PM by 47% and the total PM cost by 10% compared to the target motor.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116123482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449504
Bryton Praslicka, Matthew Johnson, Daniel Zamarron, Avery Marshall, Shima Hasanpour, M. Gardner, Alex Nguyen, Abas Goodarzi, Enzo Bauk, H. Toliyat
Future space missions require new robotic technologies, such as precision gearboxes capable of achieving speed-reduction ratios in excess of 1000:1, specific torques exceeding 50 N*m/kg, operation in environmental temperatures as low as 40 K, and operation in low-atmosphere or hard vacuum, with high reliability and lifetime. The tribological challenges associated with lengthy missions in harsh space environments may be ameliorated with contactless magnetic gearing solutions. This paper employs an extensive parametric 2-D finite element analysis (FEA) study to optimize the high-torque stage of a two-stage surface permanent magnet radial flux cycloidal magnetic gear train, accounting for the impacts of practical fabrication constraints, which degrade the achievable performance and shift the optimal gear ratio. This paper presents a novel discussion of the internal stress distribution and the reaction forces acting on the structure of the cycloidal magnetic gear. This paper also proposes a rotor with three sections to simultaneously balance the center of mass, radial magnetic forces, and off-axis torques. A proof-of-concept prototype was developed, and the experimental slip torque and specific torque are presented. The specific torque of the prototype discussed in this paper is competitive with commercial mechanical cycloidal-type drives with a similar torque rating.
{"title":"Practical Analysis and Design of a 50:1 Cycloidal Magnetic Gear with Balanced Off-Axis Moments and a High Specific Torque for Lunar Robots","authors":"Bryton Praslicka, Matthew Johnson, Daniel Zamarron, Avery Marshall, Shima Hasanpour, M. Gardner, Alex Nguyen, Abas Goodarzi, Enzo Bauk, H. Toliyat","doi":"10.1109/IEMDC47953.2021.9449504","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449504","url":null,"abstract":"Future space missions require new robotic technologies, such as precision gearboxes capable of achieving speed-reduction ratios in excess of 1000:1, specific torques exceeding 50 N*m/kg, operation in environmental temperatures as low as 40 K, and operation in low-atmosphere or hard vacuum, with high reliability and lifetime. The tribological challenges associated with lengthy missions in harsh space environments may be ameliorated with contactless magnetic gearing solutions. This paper employs an extensive parametric 2-D finite element analysis (FEA) study to optimize the high-torque stage of a two-stage surface permanent magnet radial flux cycloidal magnetic gear train, accounting for the impacts of practical fabrication constraints, which degrade the achievable performance and shift the optimal gear ratio. This paper presents a novel discussion of the internal stress distribution and the reaction forces acting on the structure of the cycloidal magnetic gear. This paper also proposes a rotor with three sections to simultaneously balance the center of mass, radial magnetic forces, and off-axis torques. A proof-of-concept prototype was developed, and the experimental slip torque and specific torque are presented. The specific torque of the prototype discussed in this paper is competitive with commercial mechanical cycloidal-type drives with a similar torque rating.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121869659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449507
Ahmed Selema, M. Ibrahim, R. Sprangers, P. Sergeant
In high speed electrical machines, one of the main challenges that can be faced is the high frequency conduction losses in the machine windings due to both skin and proximity effects. This paper studies the effect of using different types of magnet wires on the AC losses of the electric machine windings. Using finite element modelling (FEM), the conductors are subdivided into multiple strands to calculate the losses in each conductor and in each layer. Further, aiming at loss minimization, different arrangements are introduced and compared at a wide range of frequencies. Moreover, recommendations are provided based on the obtained results and comparison.
{"title":"Effect of Using Different Types of Magnet Wires on the AC Losses of Electrical Machine Windings","authors":"Ahmed Selema, M. Ibrahim, R. Sprangers, P. Sergeant","doi":"10.1109/IEMDC47953.2021.9449507","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449507","url":null,"abstract":"In high speed electrical machines, one of the main challenges that can be faced is the high frequency conduction losses in the machine windings due to both skin and proximity effects. This paper studies the effect of using different types of magnet wires on the AC losses of the electric machine windings. Using finite element modelling (FEM), the conductors are subdivided into multiple strands to calculate the losses in each conductor and in each layer. Further, aiming at loss minimization, different arrangements are introduced and compared at a wide range of frequencies. Moreover, recommendations are provided based on the obtained results and comparison.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127518437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449495
A. Abouzeid, J. Guerrero, Iker Muniategui, A. Endemaño, David Ortega, F. Briz
Traction systems for railway typically use rotor field-oriented control (RFOC) at low speeds, and scalar control at high speeds to overcome the deterioration of the current regulator performance in the overmodulation region. Well-known limitations of scalar control are the slow dynamic response due to the coupling between torque and flux, as well as the risk of overcurrents. While this is not a problem for normal operation, as fast torque variations are not required, there are specific operating conditions in which fast torque response of scalar control might be required. This would include adhesion control, torsional torque vibration mitigation and torque ripple cancellation for traction systems fed from ac catenaries without a 2F filter in the dc-link. This paper proposes a method to enhance the dynamic response of scalar control. The principles of the proposed method are derived from vector control concepts. While the method could be applied to any electric drive using scalar control, the discussion presented in this paper will be targeted towards high power railway traction drives.
{"title":"Torque Dynamics Enhancement of Railway Traction Drives Using Scalar Control","authors":"A. Abouzeid, J. Guerrero, Iker Muniategui, A. Endemaño, David Ortega, F. Briz","doi":"10.1109/IEMDC47953.2021.9449495","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449495","url":null,"abstract":"Traction systems for railway typically use rotor field-oriented control (RFOC) at low speeds, and scalar control at high speeds to overcome the deterioration of the current regulator performance in the overmodulation region. Well-known limitations of scalar control are the slow dynamic response due to the coupling between torque and flux, as well as the risk of overcurrents. While this is not a problem for normal operation, as fast torque variations are not required, there are specific operating conditions in which fast torque response of scalar control might be required. This would include adhesion control, torsional torque vibration mitigation and torque ripple cancellation for traction systems fed from ac catenaries without a 2F filter in the dc-link. This paper proposes a method to enhance the dynamic response of scalar control. The principles of the proposed method are derived from vector control concepts. While the method could be applied to any electric drive using scalar control, the discussion presented in this paper will be targeted towards high power railway traction drives.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126401089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449501
S. Miric, R. Giuffrida, G. Rohner, D. Bortis, J. Kolar
Linear-rotary actuators (LiRAs) are today used in industry applications where a controlled linear and rotary motion is necessary such as pick-and-place robots, servo actuation of gearboxes or tooling machines. However, in special industry applications that require high purity and/or high precision positioning, the usage of conventional LiRAs with mechanical bearings is limited. Therefore, in this paper a LiRA with integrated magnetic bearings, i.e. a selfbearing/bearingless LiRA, is analyzed. The actuator employs concentrically arranged linear and rotary stators placed inside and outside a cylindrically shaped mover, which results in a so-called selfbearing double-stator (SBDS) LiRA. A FEM geometry optimization of the SBDS LiRA is performed and Pareto performance plots concerning linear force and torque generation are obtained. A SBDS LiRA hardware demonstrator and an 18-phase inverter power supply hardware prototype are built and their operation is experimentally verified by rotary and linear position step response measurements.
{"title":"Design and Experimental Analysis of a Selfbearing Double-Stator Linear-Rotary Actuator","authors":"S. Miric, R. Giuffrida, G. Rohner, D. Bortis, J. Kolar","doi":"10.1109/IEMDC47953.2021.9449501","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449501","url":null,"abstract":"Linear-rotary actuators (LiRAs) are today used in industry applications where a controlled linear and rotary motion is necessary such as pick-and-place robots, servo actuation of gearboxes or tooling machines. However, in special industry applications that require high purity and/or high precision positioning, the usage of conventional LiRAs with mechanical bearings is limited. Therefore, in this paper a LiRA with integrated magnetic bearings, i.e. a selfbearing/bearingless LiRA, is analyzed. The actuator employs concentrically arranged linear and rotary stators placed inside and outside a cylindrically shaped mover, which results in a so-called selfbearing double-stator (SBDS) LiRA. A FEM geometry optimization of the SBDS LiRA is performed and Pareto performance plots concerning linear force and torque generation are obtained. A SBDS LiRA hardware demonstrator and an 18-phase inverter power supply hardware prototype are built and their operation is experimentally verified by rotary and linear position step response measurements.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114168692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449601
Xuliang Yao, Tongzhen Liu, Jingfang Wang, He Ma, Shengqi Huang
Model predictive current control has received a great deal of attention in the field of induction motor drives. However, the most methods select voltage vectors based on enumeration and cost function, so it greatly increases control system complexity. In order to reduce control complexity and further improve steady-state control performance, a predictive current duty cycle control based on the reference voltage (PCDCC-RV) is proposed in this paper. The applied voltage vector is determined based on the location of the synthesized reference voltage, so the complicated enumeration process is cancelled. In addition, the control duty cycle is calculated based on the principle of minimum error between the selected vector and reference voltage. Compared with the traditional method, the proposed method of voltage vector selection and duty cycle calculation are more convenient, and the better control performance is obtained. Finally, simulation results prove its effectiveness.
{"title":"Predictive Current Duty Cycle Control for Induction Motor Based on Reference Voltage","authors":"Xuliang Yao, Tongzhen Liu, Jingfang Wang, He Ma, Shengqi Huang","doi":"10.1109/IEMDC47953.2021.9449601","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449601","url":null,"abstract":"Model predictive current control has received a great deal of attention in the field of induction motor drives. However, the most methods select voltage vectors based on enumeration and cost function, so it greatly increases control system complexity. In order to reduce control complexity and further improve steady-state control performance, a predictive current duty cycle control based on the reference voltage (PCDCC-RV) is proposed in this paper. The applied voltage vector is determined based on the location of the synthesized reference voltage, so the complicated enumeration process is cancelled. In addition, the control duty cycle is calculated based on the principle of minimum error between the selected vector and reference voltage. Compared with the traditional method, the proposed method of voltage vector selection and duty cycle calculation are more convenient, and the better control performance is obtained. Finally, simulation results prove its effectiveness.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134453009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449556
Murat G. Kesgin, Peng Han, D. Lawhorn, D. Ionel
The paper presents a study of the torque production in a novel vernier-type axial-flux permanent magnet (PM) machine topology named MAGNUS. Two computational methods are employed, one based on the 3D FEA Maxwell stress calculations on individual stator and rotor components and one based on the analytical derivation of the air-gap flux density harmonics. Examples are provided for a design with a 40-pole spoke-type PM rotor and two stators, one active including a 3-phase winding with 6 concentrated coils wound around main teeth in a single layer arrangement and a second stator that has neither coils nor main slots and is profiled towards the airgap in the same way as the active stator. It is shown that auxiliary small teeth included in the stator main teeth yield a significant increase in the output torque and that the profiled stator has a lower contribution than the active stator to the total torque. A brief report on the ongoing development of a prototype motor is included.
{"title":"Analysis of Torque Production in Axial-flux Vernier PM Machines of the MAGNUS Type","authors":"Murat G. Kesgin, Peng Han, D. Lawhorn, D. Ionel","doi":"10.1109/IEMDC47953.2021.9449556","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449556","url":null,"abstract":"The paper presents a study of the torque production in a novel vernier-type axial-flux permanent magnet (PM) machine topology named MAGNUS. Two computational methods are employed, one based on the 3D FEA Maxwell stress calculations on individual stator and rotor components and one based on the analytical derivation of the air-gap flux density harmonics. Examples are provided for a design with a 40-pole spoke-type PM rotor and two stators, one active including a 3-phase winding with 6 concentrated coils wound around main teeth in a single layer arrangement and a second stator that has neither coils nor main slots and is profiled towards the airgap in the same way as the active stator. It is shown that auxiliary small teeth included in the stator main teeth yield a significant increase in the output torque and that the profiled stator has a lower contribution than the active stator to the total torque. A brief report on the ongoing development of a prototype motor is included.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129014448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449589
Abdalla Hussein Mohamed, H. Vansompel, P. Sergeant
In this paper, an integrated motor drive with modular converter structure is analysed with different number of converter modules per phase. The integration concept is realized by designing a housing structure with a flat outer surface and a circular inner surface with a cooling channel in between. The converter modules are mounted on the outer flat surface and the stator components are attached to the inner surface. This integration topology is applied on a fifteen stator coil concentrated winding permanent magnet axial flux machine. The converter modules are implemented as half-bridge inverter using Gallium Nitride (GaN) technology. The cooling structure is optimized using computational fluid dynamics (CFD) simulations. The maximum thermally safe current that can be injected by one inverter module is computed. The maximum winding current is also calculated. Parallel connection of the inverter modules is suggested to maximize the thermal utilization of the windings while keeping the inverter switches junction temperature under the rated value. The CFD based computations are validated with experimental measurements.
{"title":"An Integrated Motor Drive with Enhanced Power Density Using Modular Converter Structure","authors":"Abdalla Hussein Mohamed, H. Vansompel, P. Sergeant","doi":"10.1109/IEMDC47953.2021.9449589","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449589","url":null,"abstract":"In this paper, an integrated motor drive with modular converter structure is analysed with different number of converter modules per phase. The integration concept is realized by designing a housing structure with a flat outer surface and a circular inner surface with a cooling channel in between. The converter modules are mounted on the outer flat surface and the stator components are attached to the inner surface. This integration topology is applied on a fifteen stator coil concentrated winding permanent magnet axial flux machine. The converter modules are implemented as half-bridge inverter using Gallium Nitride (GaN) technology. The cooling structure is optimized using computational fluid dynamics (CFD) simulations. The maximum thermally safe current that can be injected by one inverter module is computed. The maximum winding current is also calculated. Parallel connection of the inverter modules is suggested to maximize the thermal utilization of the windings while keeping the inverter switches junction temperature under the rated value. The CFD based computations are validated with experimental measurements.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130723182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449564
Dominik Grauvogl, Peter Stauder, B. Hopfensperger, D. Gerling
In this paper a multiphysics development method is used for designing a novel wound field synchronous machine of the future generation of high voltage traction drives. This method covers the domains of electromagnetics, the mechanical strength, thermal behavior and the magnetic noise. It is shown that the proposed novel asymmetric design with a circular flux barrier in combination with an asymmetric pole offset is fulfilling the requirements according to performance and torque ripple. A fatigue strength rotor mechanic concept is included. A hybrid cooling concept consisting of a water jacket cooled stator and air cooled rotor ensures the needed continuous power. Unacceptable noise levels are excluded by investigating the equivalent radiated power (ERP) level due to radial forces in the air gap. Finally, the multi-physical workflow resulted in a fully developed component with a high degree of maturity.
{"title":"Multiphysics Design of a Wound Field Synchronous Machine with Magnetic Asymmetry","authors":"Dominik Grauvogl, Peter Stauder, B. Hopfensperger, D. Gerling","doi":"10.1109/IEMDC47953.2021.9449564","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449564","url":null,"abstract":"In this paper a multiphysics development method is used for designing a novel wound field synchronous machine of the future generation of high voltage traction drives. This method covers the domains of electromagnetics, the mechanical strength, thermal behavior and the magnetic noise. It is shown that the proposed novel asymmetric design with a circular flux barrier in combination with an asymmetric pole offset is fulfilling the requirements according to performance and torque ripple. A fatigue strength rotor mechanic concept is included. A hybrid cooling concept consisting of a water jacket cooled stator and air cooled rotor ensures the needed continuous power. Unacceptable noise levels are excluded by investigating the equivalent radiated power (ERP) level due to radial forces in the air gap. Finally, the multi-physical workflow resulted in a fully developed component with a high degree of maturity.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132880792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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