Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449566
S. Urbanek, Pauline Frey, S. Magerkohl, D. Zimmer, L. Tasche, M. Schaper, B. Ponick
This paper describes the design, construction and manufacturing process of an additively manufactured (AM) permanent magnet synchronous rotor with interior magnets. After this, the AM rotor is mounted into a conventional stator and tested under load and no-load. The rotor active part is manufactured from soft-magnetic ferro-silicon alloy using the powder bed-based AM technology of laser beam melting (LBM). The so-called AM functional rotor model is both designed with extended functionality and with an increased lightweight level. Therefore, the functional model is continuously skewed and its performance is compared to a non-skewed and a step-skewed rotor. In order to reduce eddy current losses, the surface of the functional model was grooved. Furthermore, a new design of the rotor end section is presented. The weight and the inertia of the rotor are reduced by implementing lightweight AM structures, a hollow shaft and a new conical transition region between the active part and the bearings. The building process and design adjustments in order to ensure a robust additive manufacturing process are presented, too. Finally, measurements show that this new design significantly reduces the amplitude of the torque ripple. In summary, the torque of the motor is increased and the mechanical time constant is decreased by inertia reduction.
{"title":"Design and Experimental Investigation of an Additively Manufactured PMSM Rotor","authors":"S. Urbanek, Pauline Frey, S. Magerkohl, D. Zimmer, L. Tasche, M. Schaper, B. Ponick","doi":"10.1109/IEMDC47953.2021.9449566","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449566","url":null,"abstract":"This paper describes the design, construction and manufacturing process of an additively manufactured (AM) permanent magnet synchronous rotor with interior magnets. After this, the AM rotor is mounted into a conventional stator and tested under load and no-load. The rotor active part is manufactured from soft-magnetic ferro-silicon alloy using the powder bed-based AM technology of laser beam melting (LBM). The so-called AM functional rotor model is both designed with extended functionality and with an increased lightweight level. Therefore, the functional model is continuously skewed and its performance is compared to a non-skewed and a step-skewed rotor. In order to reduce eddy current losses, the surface of the functional model was grooved. Furthermore, a new design of the rotor end section is presented. The weight and the inertia of the rotor are reduced by implementing lightweight AM structures, a hollow shaft and a new conical transition region between the active part and the bearings. The building process and design adjustments in order to ensure a robust additive manufacturing process are presented, too. Finally, measurements show that this new design significantly reduces the amplitude of the torque ripple. In summary, the torque of the motor is increased and the mechanical time constant is decreased by inertia reduction.","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":"129934187","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/IEMDC47953.2021.9449547
C. Labuschagne, M. Kamper
In this paper it is proposed that permanent magnet vernier generators be used in a small-scale passive wind generator system. Various aspects such as the machine selection, design optimisation, torque quality and the overall feasibility of the proposal are investigated. The performance and power matching results that are obtained for the permanent magnet vernier generator with a magnetic gearing ratio of eight are very attractive for this application. Only the vernier generator with a magnetic gearing ratio of five is not suited for this application due to poor torque quality. Designs are confirmed by comparing 2D and 3D finite element results.
{"title":"Permanent Magnet Vernier Generator Design for a Small-scale Passive Wind Generator System","authors":"C. Labuschagne, M. Kamper","doi":"10.1109/IEMDC47953.2021.9449547","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449547","url":null,"abstract":"In this paper it is proposed that permanent magnet vernier generators be used in a small-scale passive wind generator system. Various aspects such as the machine selection, design optimisation, torque quality and the overall feasibility of the proposal are investigated. The performance and power matching results that are obtained for the permanent magnet vernier generator with a magnetic gearing ratio of eight are very attractive for this application. Only the vernier generator with a magnetic gearing ratio of five is not suited for this application due to poor torque quality. Designs are confirmed by comparing 2D and 3D finite element results.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"8 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":"128650368","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/IEMDC47953.2021.9449544
O. Tweedy, Y. Akcay, P. Giangrande, M. Galea
This work covers the design and analysis of a coaxial magnetic coupling with the aim to optimize the torque to mass ratio. Magnetic couplings provide several unique benefits over standard mechanical couplings that are made possible via magnetic torque transmission including reduced maintenance, greater tolerance for misalignment and intrinsic overload protection. The main disadvantage of magnetic couplings is that their torque to mass ratio is significantly lower than equivalent mechanical couplings. 2D magnetostatic and 3D finite element mechanical models are used to analyze the proposed coupling geometry and ensure it can transfer a maximum torque of 224 Nm and operate at a steady rotational speed of 1000 RPM. The relationship between the magnetic design parameters (pole pairs number, air gap, etc.) and the target performance parameters (torque and relative rotor angle) are established and used to develop a rotor geometry that maximizes the peak static torque. A parametric static stress analysis of the coupling geometry is also performed to reduce its mass and obtain an optimal torque to mass ratio. Finally, the torque to mass ratio of the optimized magnetic coupling is compared with mechanical couplings to demonstrate improved practicality of the design.
{"title":"Magneto-mechanical Design and Development of a Coaxial Magnetic Coupling with Optimization of Torque to Mass Ratio","authors":"O. Tweedy, Y. Akcay, P. Giangrande, M. Galea","doi":"10.1109/IEMDC47953.2021.9449544","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449544","url":null,"abstract":"This work covers the design and analysis of a coaxial magnetic coupling with the aim to optimize the torque to mass ratio. Magnetic couplings provide several unique benefits over standard mechanical couplings that are made possible via magnetic torque transmission including reduced maintenance, greater tolerance for misalignment and intrinsic overload protection. The main disadvantage of magnetic couplings is that their torque to mass ratio is significantly lower than equivalent mechanical couplings. 2D magnetostatic and 3D finite element mechanical models are used to analyze the proposed coupling geometry and ensure it can transfer a maximum torque of 224 Nm and operate at a steady rotational speed of 1000 RPM. The relationship between the magnetic design parameters (pole pairs number, air gap, etc.) and the target performance parameters (torque and relative rotor angle) are established and used to develop a rotor geometry that maximizes the peak static torque. A parametric static stress analysis of the coupling geometry is also performed to reduce its mass and obtain an optimal torque to mass ratio. Finally, the torque to mass ratio of the optimized magnetic coupling is compared with mechanical couplings to demonstrate improved practicality of the design.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"82 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":"124569789","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/IEMDC47953.2021.9449517
S. Jia, Peixiong Chen, Shuai Feng, D. Liang
In recent years, the fault-tolerant performance of electric machine systems has received much attention in the fields of electric vehicles, military industries, aerospace. This paper focuses on modeling, and field orientation control (FOC) for a novel dual stator/rotor PM and winding flux modulated PM machine (FMPM). The remarkable characteristic of the machine is that both the stator and rotor have PMs and windings. The particular structure enables the machine to generate multiple torque components, improving torque density and fault tolerance. Firstly, the machine's topology and multiple torque components are illustrated, then the mathematical model of the machine and control system based on the FOC method are investigated. Finally, simulation is carried out in MATLAB, and the simulation results verify the feasibility of the proposed method.
{"title":"Simulation of Field Orientation Control for A Dual Stator/Rotor PM and Winding Flux Modulated PM Machine","authors":"S. Jia, Peixiong Chen, Shuai Feng, D. Liang","doi":"10.1109/IEMDC47953.2021.9449517","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449517","url":null,"abstract":"In recent years, the fault-tolerant performance of electric machine systems has received much attention in the fields of electric vehicles, military industries, aerospace. This paper focuses on modeling, and field orientation control (FOC) for a novel dual stator/rotor PM and winding flux modulated PM machine (FMPM). The remarkable characteristic of the machine is that both the stator and rotor have PMs and windings. The particular structure enables the machine to generate multiple torque components, improving torque density and fault tolerance. Firstly, the machine's topology and multiple torque components are illustrated, then the mathematical model of the machine and control system based on the FOC method are investigated. Finally, simulation is carried out in MATLAB, and the simulation results verify the feasibility of the proposed method.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"6 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":"124650048","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/IEMDC47953.2021.9449584
Will Perdikakis, M. Scott, K. Yost, Chad Miller, J. Scofield
Aerospace applications demand power electronics with high power density and high reliability. Many strategies exist to improve power density and researchers are examining new power devices as a tool to achieve this goal. Commercially available silicon carbide (SiC) power devices have Figures of Merit significantly higher than silicon (Si) components. Their smaller on-resistances facilitate lower conduction losses, and their small parasitic capacitances result in reduced switching loss and increased transient switching speed. These advantages, when applied strategically, can increase power density. The reliability of SiC power devices has also improved during the last decade, but questions remain about conducted and radiated emissions that result from SiC-based hardware due to their high switching speed. This research models the conducted electromagnetic interference (EMI) of a three-phase inverter and electric machine. Experimental results confirm the validity of the model under DO-160.
{"title":"Conducted EMI Modeling and Evaluation of Si and SiC devices on Aerospace Machine","authors":"Will Perdikakis, M. Scott, K. Yost, Chad Miller, J. Scofield","doi":"10.1109/IEMDC47953.2021.9449584","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449584","url":null,"abstract":"Aerospace applications demand power electronics with high power density and high reliability. Many strategies exist to improve power density and researchers are examining new power devices as a tool to achieve this goal. Commercially available silicon carbide (SiC) power devices have Figures of Merit significantly higher than silicon (Si) components. Their smaller on-resistances facilitate lower conduction losses, and their small parasitic capacitances result in reduced switching loss and increased transient switching speed. These advantages, when applied strategically, can increase power density. The reliability of SiC power devices has also improved during the last decade, but questions remain about conducted and radiated emissions that result from SiC-based hardware due to their high switching speed. This research models the conducted electromagnetic interference (EMI) of a three-phase inverter and electric machine. Experimental results confirm the validity of the model under DO-160.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"12 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":"121093450","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/IEMDC47953.2021.9449606
Z. Mei, G. Li, Z. Zhu, R. Clark, A. Thomas, Z. Azar
This paper proposes a general analytical model of surface-mounted permanent magnet (SPM) machines with series-connected coils under inter-turn short circuit (ITSC) fault. One prominent feature of this model is that the air-gap and slot-leakage components of inductances under fault are calculated separately, which consider the influences of pole number and spatial distribution of coils. In the model, winding function approach (WFA) is used to calculate the air-gap inductance components by considering all space harmonics whilst slot-leakage inductance components are obtained by using slot permeance method. The proposed faulty machine model built in Matlab/Simulink is validated by time stepping FE simulations for a 3kW 96-slot 32-pole SPM machine. The model is suitable for the fast evaluation of fault performance of SPM machines and the development of faulty model considering core saturation if necessary. Other power ratings (0.5MW and 3MW) have also been investigated to study scaling effect on machine fault-tolerant capability.
{"title":"Scaling Effect on Inter-Turn Short-Circuit of PM Machines for Wind Power Application","authors":"Z. Mei, G. Li, Z. Zhu, R. Clark, A. Thomas, Z. Azar","doi":"10.1109/IEMDC47953.2021.9449606","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449606","url":null,"abstract":"This paper proposes a general analytical model of surface-mounted permanent magnet (SPM) machines with series-connected coils under inter-turn short circuit (ITSC) fault. One prominent feature of this model is that the air-gap and slot-leakage components of inductances under fault are calculated separately, which consider the influences of pole number and spatial distribution of coils. In the model, winding function approach (WFA) is used to calculate the air-gap inductance components by considering all space harmonics whilst slot-leakage inductance components are obtained by using slot permeance method. The proposed faulty machine model built in Matlab/Simulink is validated by time stepping FE simulations for a 3kW 96-slot 32-pole SPM machine. The model is suitable for the fast evaluation of fault performance of SPM machines and the development of faulty model considering core saturation if necessary. Other power ratings (0.5MW and 3MW) have also been investigated to study scaling effect on machine fault-tolerant capability.","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":"133426484","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/IEMDC47953.2021.9449540
R. Liu, Xiao Li, Boxue Hu, Ziwei Ke, J. Pan, Longya Xu, Julia Zhang, Jin Wang
Modular multilevel converters (MMC) are popular for high-voltage, high-power electric energy conversion. To improve the reliability of MMCs, fault diagnosis and tolerant control have been studied by many researchers. Fault reconfiguration, one important step of the fault tolerant control, has become a challenge, especially under high-voltage operation. Arm current overshoot occurs during the reconfiguration if the MMC does not provide redundant submodules (SMs). Existing publications focus on the fault detection and localization. This work investigates the reconfiguration and proposes a suppression control strategy for the overcurrent. The strategy does not require redundant SMs. The proposed method is simulated in Matlab/Simulink and validated by experiments based on a three-phase MMC using an RL load.
{"title":"Arm Current Overshoot Reduction for Submodule Open-circuit Fault Reconfiguration in Modular Multilevel Converters","authors":"R. Liu, Xiao Li, Boxue Hu, Ziwei Ke, J. Pan, Longya Xu, Julia Zhang, Jin Wang","doi":"10.1109/IEMDC47953.2021.9449540","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449540","url":null,"abstract":"Modular multilevel converters (MMC) are popular for high-voltage, high-power electric energy conversion. To improve the reliability of MMCs, fault diagnosis and tolerant control have been studied by many researchers. Fault reconfiguration, one important step of the fault tolerant control, has become a challenge, especially under high-voltage operation. Arm current overshoot occurs during the reconfiguration if the MMC does not provide redundant submodules (SMs). Existing publications focus on the fault detection and localization. This work investigates the reconfiguration and proposes a suppression control strategy for the overcurrent. The strategy does not require redundant SMs. The proposed method is simulated in Matlab/Simulink and validated by experiments based on a three-phase MMC using an RL load.","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":"133037791","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/IEMDC47953.2021.9449604
M. England, Boris Dotz, B. Ponick
Hairpin windings are widely used in automotive traction motors due to their high slot fill factor and their highly automated manufacturing process. The hairpins are arranged in layers in the stator slots, which offer additional degrees of freedom compared to conventional stranded wire windings in the design process. However, a circulating current within the parallel branches can occur, if the electromagnetic force or the effective branch resistance of each parallel branch differs. Consequently, several design rules have been formulated in the past. In this research, designs of short-pitched and full-pitched hairpin windings are presented and their excitation of circulating currents is evaluated. Time-transient finite element analyses of the current displacement effects in hairpin conductors in a single slot and in an exemplary machine are performed. It is shown that commonly applied design guidelines are not sufficient to fully prevent circulating currents. As a consequence, the definitions of weak and strong symmetry are suggested, the latter of which ensuring that circulating currents are not excited.
{"title":"Evaluation of Winding Symmetry and Circulating Currents of Hairpin Windings","authors":"M. England, Boris Dotz, B. Ponick","doi":"10.1109/IEMDC47953.2021.9449604","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449604","url":null,"abstract":"Hairpin windings are widely used in automotive traction motors due to their high slot fill factor and their highly automated manufacturing process. The hairpins are arranged in layers in the stator slots, which offer additional degrees of freedom compared to conventional stranded wire windings in the design process. However, a circulating current within the parallel branches can occur, if the electromagnetic force or the effective branch resistance of each parallel branch differs. Consequently, several design rules have been formulated in the past. In this research, designs of short-pitched and full-pitched hairpin windings are presented and their excitation of circulating currents is evaluated. Time-transient finite element analyses of the current displacement effects in hairpin conductors in a single slot and in an exemplary machine are performed. It is shown that commonly applied design guidelines are not sufficient to fully prevent circulating currents. As a consequence, the definitions of weak and strong symmetry are suggested, the latter of which ensuring that circulating currents are not excited.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"20 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":"115935955","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/IEMDC47953.2021.9449495
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}
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