Pub Date : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235847
H. Matsumori, Yuto Maeda, T. Kosaka, N. Matsui, S. Saha
A dual inverter-fed open winding interior permanent magnet synchronous motor employing a dual battery source is found to be a promising drive system configuration for a high-power premium class electric vehicle. From the standpoints of high drive system efficiency and low motor acoustic noise, in this paper, selection of different optimum PWM switching modes according to the vehicle driving states is proposed for such a drive system configuration. Suitable simulation and experimental results for the motor drive system with 65 kW are presented to validate the proposed selection of different optimum PWM switching modes based on the vehicle driving states.
{"title":"Optimum PWM Switching Mode Selection of Dual Inverter-fed Open Winding IPMSM Drive System for High-power Premium Class EV","authors":"H. Matsumori, Yuto Maeda, T. Kosaka, N. Matsui, S. Saha","doi":"10.1109/ECCE44975.2020.9235847","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235847","url":null,"abstract":"A dual inverter-fed open winding interior permanent magnet synchronous motor employing a dual battery source is found to be a promising drive system configuration for a high-power premium class electric vehicle. From the standpoints of high drive system efficiency and low motor acoustic noise, in this paper, selection of different optimum PWM switching modes according to the vehicle driving states is proposed for such a drive system configuration. Suitable simulation and experimental results for the motor drive system with 65 kW are presented to validate the proposed selection of different optimum PWM switching modes based on the vehicle driving states.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121709334","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235884
Semih Isik, M. Alharbi, S. Bhattacharya
MMC has drawn broad interest in high voltage applications due to its superior features such as scalability, modularity, inherent redundancy, and low harmonic generation. The control algorithm of a high voltage MMC application needs a meticulous design, as the number of floating capacitors can be quite a large number. Any voltage mismatch between these capacitors causes a circulating current, which increases the RMS and the peak value of the arm currents, component ratings, and the ripple in the capacitor voltages. In this paper, an optimized closed-loop circulating current control method is proposed based on Proportional Resonant (PR) and Proportional Integral (PI) controllers in stationary abc reference frame to prevent high circulating current inside an MMC. The proposed method is simple and can be applied to single-phase or three-phase MMC applications. More importantly, it suppresses the magnitude of circulating current while reducing the ripple in capacitor voltages. Furthermore, it reduces the ripple in the DC link voltage without any supplementary controller. The verification of the method is verified on a 161- level MMC HVDC system, which is modeled on a Real-Time Digital Simulator (RTDS) and Xilinx Virtex-7 Field Gate Programmable Array (FPGA) units.
{"title":"Optimized Circulating Current Control Method based on Proportional Resonant and Proportional Integral Controllers for Modular Multi-level Converter Applications","authors":"Semih Isik, M. Alharbi, S. Bhattacharya","doi":"10.1109/ECCE44975.2020.9235884","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235884","url":null,"abstract":"MMC has drawn broad interest in high voltage applications due to its superior features such as scalability, modularity, inherent redundancy, and low harmonic generation. The control algorithm of a high voltage MMC application needs a meticulous design, as the number of floating capacitors can be quite a large number. Any voltage mismatch between these capacitors causes a circulating current, which increases the RMS and the peak value of the arm currents, component ratings, and the ripple in the capacitor voltages. In this paper, an optimized closed-loop circulating current control method is proposed based on Proportional Resonant (PR) and Proportional Integral (PI) controllers in stationary abc reference frame to prevent high circulating current inside an MMC. The proposed method is simple and can be applied to single-phase or three-phase MMC applications. More importantly, it suppresses the magnitude of circulating current while reducing the ripple in capacitor voltages. Furthermore, it reduces the ripple in the DC link voltage without any supplementary controller. The verification of the method is verified on a 161- level MMC HVDC system, which is modeled on a Real-Time Digital Simulator (RTDS) and Xilinx Virtex-7 Field Gate Programmable Array (FPGA) units.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132070895","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9236399
A. Felinto, C. Jacobina
This work proposes a three-phase AC-DC-AC converter suitable for operation as unified power quality conditioner (UPQC). The proposed converter is composed of a six-leg three-phase cell connected with H-bridge floating cells at the grid side. This configuration makes three-legs of the six-leg cell shared between load and grid. The six-leg cell is naturally able to cope with all load unbalance, such that no current unbalance is transmitted from load to grid. Additionally, the H-bridges provide multilevel features to the converter grid side, reducing harmonic distortion. Two operations of the proposed converter are analysed: DC-link voltage ratio of 3:1 and 2:1. Converter model, space vector pulse width modulation (SVPWM) and control strategy are presented. The proposed converter is compared with conventional solutions considering harmonic distortion, semiconductor losses, average switching frequency, number and reverse blocking voltage of semiconductor devices. Experimental results are presented for validation.
{"title":"Three-phase AC-DC-AC converter with shared legs and floating H-bridges","authors":"A. Felinto, C. Jacobina","doi":"10.1109/ECCE44975.2020.9236399","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9236399","url":null,"abstract":"This work proposes a three-phase AC-DC-AC converter suitable for operation as unified power quality conditioner (UPQC). The proposed converter is composed of a six-leg three-phase cell connected with H-bridge floating cells at the grid side. This configuration makes three-legs of the six-leg cell shared between load and grid. The six-leg cell is naturally able to cope with all load unbalance, such that no current unbalance is transmitted from load to grid. Additionally, the H-bridges provide multilevel features to the converter grid side, reducing harmonic distortion. Two operations of the proposed converter are analysed: DC-link voltage ratio of 3:1 and 2:1. Converter model, space vector pulse width modulation (SVPWM) and control strategy are presented. The proposed converter is compared with conventional solutions considering harmonic distortion, semiconductor losses, average switching frequency, number and reverse blocking voltage of semiconductor devices. Experimental results are presented for validation.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132252936","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235814
M. Lucu, Markel Azkue, H. Camblong, E. Martinez-Laserna
Conventional Li-ion battery ageing models require a significant amount of time and experimental resources to provide accurate predictions under realistic operating conditions. Furthermore, there is still an uncertainty on the validity of purely laboratory data-based ageing models for the accurate ageing prediction of battery systems deployed in field.At the same time, there is significant interest from industry in the introduction of new data collection telemetry technology. This implies the forthcoming availability of a significant amount of in-field battery operation data. In this context, the development of ageing models able to learn from in-field battery operation data is an interesting solution to mitigate the need for exhaustive laboratory testing, reduce the development cost of ageing models and at the same time ensure the validity of the model for prediction under real operating conditions.In this paper, a holistic data-driven ageing model developed under the Gaussian Process framework is validated with experimental battery ageing data. Both calendar and cycle ageing are considered, to predict the capacity loss within real EV driving scenarios. The model can learn from the driving data progressively observed, improving continuously its performances and providing more accurate and confident predictions.
{"title":"Data-Driven Nonparametric Li-Ion Battery Ageing Model Aiming At Learning From Real Operation Data: Holistic Validation With Ev Driving Profiles","authors":"M. Lucu, Markel Azkue, H. Camblong, E. Martinez-Laserna","doi":"10.1109/ECCE44975.2020.9235814","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235814","url":null,"abstract":"Conventional Li-ion battery ageing models require a significant amount of time and experimental resources to provide accurate predictions under realistic operating conditions. Furthermore, there is still an uncertainty on the validity of purely laboratory data-based ageing models for the accurate ageing prediction of battery systems deployed in field.At the same time, there is significant interest from industry in the introduction of new data collection telemetry technology. This implies the forthcoming availability of a significant amount of in-field battery operation data. In this context, the development of ageing models able to learn from in-field battery operation data is an interesting solution to mitigate the need for exhaustive laboratory testing, reduce the development cost of ageing models and at the same time ensure the validity of the model for prediction under real operating conditions.In this paper, a holistic data-driven ageing model developed under the Gaussian Process framework is validated with experimental battery ageing data. Both calendar and cycle ageing are considered, to predict the capacity loss within real EV driving scenarios. The model can learn from the driving data progressively observed, improving continuously its performances and providing more accurate and confident predictions.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129986752","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235933
Minjae Sung, Geon-Hong Min, Jung-Ik Ha
In this paper, with two H-bridge inverters like a dual active bridge, a dual side controlled wireless power transfer (WPT) system is proposed, especially without communication. In conventional dual side-controlled communication-less WPT studies, load condition is unknown at the primary side inverter. So, the primary side inverter usually operates in the full load condition. This paper proposes a way for controlling the primary side inverter according to load conditions with the estimation of secondary side inverter information. For the way, the estimation procedure of mutual inductance considering the change of self-inductance at the primary side is proposed. The proposed method improves efficiency at the overall load condition, which is verified with the experimental results.
{"title":"Dual Side Control of Wireless Power Transfer with Mutual Inductance Estimation","authors":"Minjae Sung, Geon-Hong Min, Jung-Ik Ha","doi":"10.1109/ECCE44975.2020.9235933","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235933","url":null,"abstract":"In this paper, with two H-bridge inverters like a dual active bridge, a dual side controlled wireless power transfer (WPT) system is proposed, especially without communication. In conventional dual side-controlled communication-less WPT studies, load condition is unknown at the primary side inverter. So, the primary side inverter usually operates in the full load condition. This paper proposes a way for controlling the primary side inverter according to load conditions with the estimation of secondary side inverter information. For the way, the estimation procedure of mutual inductance considering the change of self-inductance at the primary side is proposed. The proposed method improves efficiency at the overall load condition, which is verified with the experimental results.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"05 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130204313","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235762
H. N, Tomoyuki Mannen, K. Wada
This paper discusses a three-phase isolated rectifier with integrated buck functionality, derived from an unfolding three-phase inverter and a 7-level forward converter. Its operating principle is based on current shaping and unfolding methods. The circuit consists of 10 diodes, 3 low-frequency bidirectional switches and 8 high-frequency switches. It operates as a current source converter and requires only 3 filter capacitors at the ac input and a dc filter inductor at the dc output. Parasitic inductances from the ac grid enable direct connection to the utility. This paper discusses the basic operating principle and control method of the proposed inverter. It proposes a new unsymmetrical modulation method that can reduce switching frequency while maintaining the accuracy of current sampling. Also, an active damping method is used to overcome intrinsic oscillation due to unfolding operation. Finally, experimental verification is carried out to confirm stable operation of the proposed three-phase isolated rectifier.
{"title":"A Three-Phase Isolated Rectifier using Current Unfolding and Active Damping Methods","authors":"H. N, Tomoyuki Mannen, K. Wada","doi":"10.1109/ECCE44975.2020.9235762","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235762","url":null,"abstract":"This paper discusses a three-phase isolated rectifier with integrated buck functionality, derived from an unfolding three-phase inverter and a 7-level forward converter. Its operating principle is based on current shaping and unfolding methods. The circuit consists of 10 diodes, 3 low-frequency bidirectional switches and 8 high-frequency switches. It operates as a current source converter and requires only 3 filter capacitors at the ac input and a dc filter inductor at the dc output. Parasitic inductances from the ac grid enable direct connection to the utility. This paper discusses the basic operating principle and control method of the proposed inverter. It proposes a new unsymmetrical modulation method that can reduce switching frequency while maintaining the accuracy of current sampling. Also, an active damping method is used to overcome intrinsic oscillation due to unfolding operation. Finally, experimental verification is carried out to confirm stable operation of the proposed three-phase isolated rectifier.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134025952","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235479
E. Serban, Mohammad Ali Saket, M. Ordonez
Power semiconductor devices require advanced pulse-width gate-driver capability to successfully convert power for high performance operation. In this paper, a simplified forward isolated converter topology with an integrated planar transformer is proposed, which eliminates the need of output filter inductor while rearranging the clamp circuit for reduced components ratings and voltage stress in a cost-effective solution. The proposed single-switch forward converter topology employs switch protection and transformer core demagnetization with Zener diode voltage-clamped circuit. Through the converter analysis, the switching frequency has been selected in relationship to the transformer inductance and the equivalent circuit capacitance for the benefit of soft-switching devices transitions. The converter features multiple isolated secondaries necessary for independent gate-driver voltage supplies in multi-level converters. Specifically, the proposed converter provides voltage supplies for a gate-driver power devices pair, such as half-bridge SiC devices. The integrated solution reduces the total number of gate-drivers transformers necessary in multilevel-based 1500V converters. The simulation and experimental results are obtained from a gate-drive application platform to demonstrate the validity of the proposed isolated dc-dc converter design with integrated planar transformer.
{"title":"High Performance Gate-Driver Power Supply for Multilevel-based 1500 V Converters","authors":"E. Serban, Mohammad Ali Saket, M. Ordonez","doi":"10.1109/ECCE44975.2020.9235479","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235479","url":null,"abstract":"Power semiconductor devices require advanced pulse-width gate-driver capability to successfully convert power for high performance operation. In this paper, a simplified forward isolated converter topology with an integrated planar transformer is proposed, which eliminates the need of output filter inductor while rearranging the clamp circuit for reduced components ratings and voltage stress in a cost-effective solution. The proposed single-switch forward converter topology employs switch protection and transformer core demagnetization with Zener diode voltage-clamped circuit. Through the converter analysis, the switching frequency has been selected in relationship to the transformer inductance and the equivalent circuit capacitance for the benefit of soft-switching devices transitions. The converter features multiple isolated secondaries necessary for independent gate-driver voltage supplies in multi-level converters. Specifically, the proposed converter provides voltage supplies for a gate-driver power devices pair, such as half-bridge SiC devices. The integrated solution reduces the total number of gate-drivers transformers necessary in multilevel-based 1500V converters. The simulation and experimental results are obtained from a gate-drive application platform to demonstrate the validity of the proposed isolated dc-dc converter design with integrated planar transformer.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134040975","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9236059
D. F. Laborda, David Diaz Reigosa, Daniel Fernández, Kensuke Sasaki, Takashi Kato, F. Briz
Permanent magnet synchronous machines (PMSMs) performance is highly dependent on the Permanent Magnets (PMs) temperature. Knowledge of the PMs temperature is therefore of great importance both for control and monitoring purposes. An increase in the PM temperature during motor operation, decreases PMs magnetic flux strength and consequently the PMSM torque production capability, eventually causing irreversible demagnetization of the PMs; for the case of variable leakage flux PMSMs (VLF- PMSMs), it will affect the variable leakage property of the machine, which will place additional concerns on the machine control. This paper proposes a PM temperature estimation method for VLF-PMSMs from the PM flux linkage. PM flux linkage is obtained from the response of the machine to a small-amplitude, low frequency, square-wave signal (either voltage or current). The signal is injected on top of the fundamental excitation, allowing on-line temperature estimation without interfering with the operation of the machine
{"title":"Magnet Temperature Estimation in Variable Leakage Flux Permanent Magnet Synchronous Machines Using the Magnet Flux Linkage","authors":"D. F. Laborda, David Diaz Reigosa, Daniel Fernández, Kensuke Sasaki, Takashi Kato, F. Briz","doi":"10.1109/ECCE44975.2020.9236059","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9236059","url":null,"abstract":"Permanent magnet synchronous machines (PMSMs) performance is highly dependent on the Permanent Magnets (PMs) temperature. Knowledge of the PMs temperature is therefore of great importance both for control and monitoring purposes. An increase in the PM temperature during motor operation, decreases PMs magnetic flux strength and consequently the PMSM torque production capability, eventually causing irreversible demagnetization of the PMs; for the case of variable leakage flux PMSMs (VLF- PMSMs), it will affect the variable leakage property of the machine, which will place additional concerns on the machine control. This paper proposes a PM temperature estimation method for VLF-PMSMs from the PM flux linkage. PM flux linkage is obtained from the response of the machine to a small-amplitude, low frequency, square-wave signal (either voltage or current). The signal is injected on top of the fundamental excitation, allowing on-line temperature estimation without interfering with the operation of the machine","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132607840","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9236026
Md Nazmul Islam, R. Mikail, Ritvik Chattopadhyay, I. Husain
A novel 3D-airgap electric machine concept with multiple torque producing planes within the same structure is proposed to enhance the torque density of conventional machine topologies. The airgap of conventional machine topologies is limited to one fixed plane. The 3D-airgap configuration can be conceived in several different ways. In this research, one planar axial airgap and one cylindrical airgap is electromagnetically integrated into one 3D-airgap machine which increases mass utilization by integrating structural components into torque producing components. Moreover, the 3D-airgap concept maximizes the use of the end-winding section of the radial flux portion by converting it into a torque producing component. The 3D-airgap machine concept is validated through 3D-finite element analysis (FEA). It is found that the 3D-airgap concept can have more than double torque density compared to the 2D-airgap machine within the same active volume. It also helps to increase the torque per unit conductor loss; thus, it will have a better thermal performance for the same output torque. Resulting power density (kW/liter and kW/kg) also improves substantially. Additionally, a simulation method is proposed to predict 3D-airgap machines’ performances using the superposition principle. The proposed simulation method significantly reduces the computational time required for 3D-FEA.
{"title":"A 3D-Airgap Slotless Permanent Magnet Machine for Transportation Applications","authors":"Md Nazmul Islam, R. Mikail, Ritvik Chattopadhyay, I. Husain","doi":"10.1109/ECCE44975.2020.9236026","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9236026","url":null,"abstract":"A novel 3D-airgap electric machine concept with multiple torque producing planes within the same structure is proposed to enhance the torque density of conventional machine topologies. The airgap of conventional machine topologies is limited to one fixed plane. The 3D-airgap configuration can be conceived in several different ways. In this research, one planar axial airgap and one cylindrical airgap is electromagnetically integrated into one 3D-airgap machine which increases mass utilization by integrating structural components into torque producing components. Moreover, the 3D-airgap concept maximizes the use of the end-winding section of the radial flux portion by converting it into a torque producing component. The 3D-airgap machine concept is validated through 3D-finite element analysis (FEA). It is found that the 3D-airgap concept can have more than double torque density compared to the 2D-airgap machine within the same active volume. It also helps to increase the torque per unit conductor loss; thus, it will have a better thermal performance for the same output torque. Resulting power density (kW/liter and kW/kg) also improves substantially. Additionally, a simulation method is proposed to predict 3D-airgap machines’ performances using the superposition principle. The proposed simulation method significantly reduces the computational time required for 3D-FEA.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125231006","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9236391
R. Wróbel, D. Reay
This theoretical feasibility study explores the use of heat pipes (HPs) in thermal management of electrical machines. The research focus has been placed on the statorwinding assembly to assess suitability and effectiveness of HP- based heat removal systems. The proposed approach targets the main heat source in electrical machines, which frequently is associated with the winding subassembly. Two generic concept thermal management systems are investigated. The first one uses HPs to enhance heat removal for a machine with conventional cooling, e.g. a liquid or air-cooled housing. The second concept uses HPs as the main heat transfer path, e.g. a fully enclosed machine with no integrated, actively cooled housing. The electromagnetic and thermal compatibility of the proposed HP-based thermal management systems is analysed by means of three-dimensional (3D) finite element analyses (FEAs). The theoretical findings show that the proposed thermal management systems allow for a considerable improvement in heat removal from the machine body, up to 43% and 25% for the concept one and two respectively, as compared with a more conventional heat removal system. The overall performance gains are subject to the specific manufacture and assembly processes used in construction of the stator-winding.
{"title":"A Feasibility Study of Heat Pipes for Thermal Management of Electrical Machines","authors":"R. Wróbel, D. Reay","doi":"10.1109/ECCE44975.2020.9236391","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9236391","url":null,"abstract":"This theoretical feasibility study explores the use of heat pipes (HPs) in thermal management of electrical machines. The research focus has been placed on the statorwinding assembly to assess suitability and effectiveness of HP- based heat removal systems. The proposed approach targets the main heat source in electrical machines, which frequently is associated with the winding subassembly. Two generic concept thermal management systems are investigated. The first one uses HPs to enhance heat removal for a machine with conventional cooling, e.g. a liquid or air-cooled housing. The second concept uses HPs as the main heat transfer path, e.g. a fully enclosed machine with no integrated, actively cooled housing. The electromagnetic and thermal compatibility of the proposed HP-based thermal management systems is analysed by means of three-dimensional (3D) finite element analyses (FEAs). The theoretical findings show that the proposed thermal management systems allow for a considerable improvement in heat removal from the machine body, up to 43% and 25% for the concept one and two respectively, as compared with a more conventional heat removal system. The overall performance gains are subject to the specific manufacture and assembly processes used in construction of the stator-winding.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117325603","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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