Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5542381
J. Wolmarans, H. Polinder, J. A. Ferreria, D. Clarenbach
Electrical machines used in aerospace applications require fault tolerance to ensure high availability. This frequently includes partitioning, increasing the number of machine and drive phases. Fitting every partitioned phase with a localised controller increases the autonomy of each phase. Using the magnetisation of the rotor as reference, minimal communication between phases is required. An overhead controller is used for open loop startup. Due to the high rotor speed, sensorless control is implemented to avoid reliability problems with encoders. Low frequency commutation is used to lower computational effort and converter loss.
{"title":"Modular sensorless control of high speed, fault tolerant machines","authors":"J. Wolmarans, H. Polinder, J. A. Ferreria, D. Clarenbach","doi":"10.1109/IPEC.2010.5542381","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5542381","url":null,"abstract":"Electrical machines used in aerospace applications require fault tolerance to ensure high availability. This frequently includes partitioning, increasing the number of machine and drive phases. Fitting every partitioned phase with a localised controller increases the autonomy of each phase. Using the magnetisation of the rotor as reference, minimal communication between phases is required. An overhead controller is used for open loop startup. Due to the high rotor speed, sensorless control is implemented to avoid reliability problems with encoders. Low frequency commutation is used to lower computational effort and converter loss.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131244972","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5544580
M. Cao
An electrical losses (copper and iron losses) minimization control of interior permanent magnet synchronous motors is proposed in this paper. Until now a Look-up Table based maximum torque per armature current control strategy was proposed by authors. That is a control to minimize copper losses. Meanwhile, the efficiency deteriorates as a result that the iron losses increase sharply in high speed area. In this paper, a model considering iron losses is discussed and the relationship between the electrical losses and d-q axes current, motor torque, motor speed is clarified at first. Next, measurement experiments are made to prove that there is an optimal armature current phase which minimize the electrical losses for given motor speed and load torque. Then, an online loss minimization algorithm with steepest descent method (golden section method) is proposed. The electrical losses in id=3D0 control and loss minimization control are compared with experiment results. The effectiveness of the proposed control is verified by experiments.
{"title":"Online Loss Minimization Control of IPMSM for Electric Scooters","authors":"M. Cao","doi":"10.1109/IPEC.2010.5544580","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5544580","url":null,"abstract":"An electrical losses (copper and iron losses) minimization control of interior permanent magnet synchronous motors is proposed in this paper. Until now a Look-up Table based maximum torque per armature current control strategy was proposed by authors. That is a control to minimize copper losses. Meanwhile, the efficiency deteriorates as a result that the iron losses increase sharply in high speed area. In this paper, a model considering iron losses is discussed and the relationship between the electrical losses and d-q axes current, motor torque, motor speed is clarified at first. Next, measurement experiments are made to prove that there is an optimal armature current phase which minimize the electrical losses for given motor speed and load torque. Then, an online loss minimization algorithm with steepest descent method (golden section method) is proposed. The electrical losses in id=3D0 control and loss minimization control are compared with experiment results. The effectiveness of the proposed control is verified by experiments.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133362899","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5544509
C. Yamazaki, E. Ikawa, T. Yoshino, Kosuke Sato, F. Saito, S. Nakamura, H. Matsumoto, H. Kobayashi
A 10 MW-class high-precision power supply was developed for the electromagnets of a large proton accelerator (J-PARC). This power supply consists of an advanced self-commutated current-source type converter (ACSC) using IEGTs and a hybrid filter. The current ripple was less than 1×10−6, and the tracking error was less than ±0.5×104. With this power supply, the proton beam was successfully accelerated to 30 GeV, which is the target energy of the first stage of J-PARC.
{"title":"Beam acceleration experiment with developed 10 MW class high-precision power supply for accelerator electromagnets","authors":"C. Yamazaki, E. Ikawa, T. Yoshino, Kosuke Sato, F. Saito, S. Nakamura, H. Matsumoto, H. Kobayashi","doi":"10.1109/IPEC.2010.5544509","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5544509","url":null,"abstract":"A 10 MW-class high-precision power supply was developed for the electromagnets of a large proton accelerator (J-PARC). This power supply consists of an advanced self-commutated current-source type converter (ACSC) using IEGTs and a hybrid filter. The current ripple was less than 1×10−6, and the tracking error was less than ±0.5×104. With this power supply, the proton beam was successfully accelerated to 30 GeV, which is the target energy of the first stage of J-PARC.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"59 20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133483789","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5543727
K. Takao, S. Harada, T. Shinohe, H. Ohashi
In high-power density power converter designs, power losses of power devices are essential design parameters because they determines the volume of cooling systems. The power loss of a SiC power module using a SiC Implantation and Epitaxial MOSFET (SiC-IEMOSFET) has been evaluated in the junction temperature range from 150 °C to 250 °C and the current density range from 100 A/cm2 to 250 A/cm2. By using the power loss data, design criteria of the junction temperature and current density of the SiC-IEMOSFET to realize the power density of 50W/cm3 have been extracted.
在大功率密度变换器设计中，功率器件的功率损耗是重要的设计参数，因为它决定了冷却系统的体积。在结温为150 ~ 250℃，电流密度为100 ~ 250 a /cm2的情况下，对采用SiC植入外延MOSFET (SiC- iemosfet)的SiC功率模块的功率损耗进行了评估。利用功率损耗数据，提取了实现功率密度为50W/cm3的SiC-IEMOSFET结温和电流密度的设计准则。
{"title":"Performance evaluation of all SiC power converters for realizing high power density of 50 W/cm3","authors":"K. Takao, S. Harada, T. Shinohe, H. Ohashi","doi":"10.1109/IPEC.2010.5543727","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543727","url":null,"abstract":"In high-power density power converter designs, power losses of power devices are essential design parameters because they determines the volume of cooling systems. The power loss of a SiC power module using a SiC Implantation and Epitaxial MOSFET (SiC-IEMOSFET) has been evaluated in the junction temperature range from 150 °C to 250 °C and the current density range from 100 A/cm2 to 250 A/cm2. By using the power loss data, design criteria of the junction temperature and current density of the SiC-IEMOSFET to realize the power density of 50W/cm3 have been extracted.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133537754","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5542275
C. Wildmann, T. Nussbaumer, J. W. Kolar
This paper presents conceptual ideas for an ultra-high speed spinning ball motor with a target speed in the range of several tens of million rotations per minute. The research should prepare the next generation of ultrahigh speed motors. The focus of this work is to investigate physical limitations and discuss feasible concepts for the realization of such drive systems. One major issue is the analysis of the mechanical stresses occurring in the rotor during centrifugal rotation with focus on the rotor shape by using 3D FEM simulation tools. Furthermore, magnetic levitation concepts for a friction-less bearing system are presented and discussed. Two alternative concepts for the position sensing system, which is necessary for detecting the rotor position for the magnetic bearing, are presented and compared. Finally, a first motor prototype is presented to offer basic behavioral insights into the system and its stability.
{"title":"10 Mrpm spinning ball motor: Preparing the next generation of ultra-high speed drive systems","authors":"C. Wildmann, T. Nussbaumer, J. W. Kolar","doi":"10.1109/IPEC.2010.5542275","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5542275","url":null,"abstract":"This paper presents conceptual ideas for an ultra-high speed spinning ball motor with a target speed in the range of several tens of million rotations per minute. The research should prepare the next generation of ultrahigh speed motors. The focus of this work is to investigate physical limitations and discuss feasible concepts for the realization of such drive systems. One major issue is the analysis of the mechanical stresses occurring in the rotor during centrifugal rotation with focus on the rotor shape by using 3D FEM simulation tools. Furthermore, magnetic levitation concepts for a friction-less bearing system are presented and discussed. Two alternative concepts for the position sensing system, which is necessary for detecting the rotor position for the magnetic bearing, are presented and compared. Finally, a first motor prototype is presented to offer basic behavioral insights into the system and its stability.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132162192","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5542349
B. Song, Ki-Chan Chang, Jang-young Choi
This paper proposes an outer-rotor-type permanent magnet motor for electric scooter propulsion systems. The designed motor is integrated into the wheel rim on the tire and meets the specifications of the electric scooter. The simulation using non-linear finite element analysis (FEA) method results match experimental data obtained from the prototype 20-poles motor for electric scooter propulsion systems. The overall efficiency achieved 87% at rated speed. The detailed test results have been presented.
{"title":"Design of an outer-rotor-type permanent magnet motor for electric scooter propulsion systems","authors":"B. Song, Ki-Chan Chang, Jang-young Choi","doi":"10.1109/IPEC.2010.5542349","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5542349","url":null,"abstract":"This paper proposes an outer-rotor-type permanent magnet motor for electric scooter propulsion systems. The designed motor is integrated into the wheel rim on the tire and meets the specifications of the electric scooter. The simulation using non-linear finite element analysis (FEA) method results match experimental data obtained from the prototype 20-poles motor for electric scooter propulsion systems. The overall efficiency achieved 87% at rated speed. The detailed test results have been presented.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123176508","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5543546
N. Mutoh, Yoshifumi Ohnuma, Kota Suzuki
There is a problem peculiar to photovoltaic (PV) generation systems that output power changes with weather conditions. The paper describes a PV generation system with high reliability which can always stably supply clean electric power to loads. The stabilization of the PV generation system is realized here by compensating the generated electric power, which changes with weather, in cooperation with a polymer electrolyte fuel cell (PEFC) using electric double layer capacitors (EDLCs). Normally, the PV generation system supplies the acquired electric power as the first priority to loads. Only when the voltage of the EDLCs increases to a predetermined value, is the acquired electric power regenerated for the utility. Consumption of the PEFC fuel and regeneration for the utility are suppressed as much as possible. The effectiveness of the proposed PV generation system as a power supply was verified through transient analyses using a simulator electrically equivalent to PV arrays actually used.
{"title":"A high reliability photovoltaic (PV) generation system in cooperation with a polymer electrolyte fuel cell (PEFC) using electric double layer capacitors (EDLCs)","authors":"N. Mutoh, Yoshifumi Ohnuma, Kota Suzuki","doi":"10.1109/IPEC.2010.5543546","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543546","url":null,"abstract":"There is a problem peculiar to photovoltaic (PV) generation systems that output power changes with weather conditions. The paper describes a PV generation system with high reliability which can always stably supply clean electric power to loads. The stabilization of the PV generation system is realized here by compensating the generated electric power, which changes with weather, in cooperation with a polymer electrolyte fuel cell (PEFC) using electric double layer capacitors (EDLCs). Normally, the PV generation system supplies the acquired electric power as the first priority to loads. Only when the voltage of the EDLCs increases to a predetermined value, is the acquired electric power regenerated for the utility. Consumption of the PEFC fuel and regeneration for the utility are suppressed as much as possible. The effectiveness of the proposed PV generation system as a power supply was verified through transient analyses using a simulator electrically equivalent to PV arrays actually used.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128813981","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5542095
H. Nagura, Y. Iwaji, J. Nakatsugawa, Norihisa Iwasaki
A new magnetic-flux saturation model has been developed for permanent magnet synchronous motors. In the new model, simple first-order functions Φd(id, iq) and Φq(id, iq) express the relationships between d-q axis currents and each axis magnetic flux, considering magnetic saturation and cross-coupling effects. Taking advantage of these new features, we developed a current controller that introduced the precise inverse model of the motor using the above function. Furthermore, simulations of the proposed current controller were evaluated under ideal conditions without any modeling error. Moreover, it showed, in principle, that the ideal first-order lag characteristic without the current interference between d-q axes could be realized in the conditions of cross-coupling magnetic flux saturation.
{"title":"New vector controller for PM motors which modeled the cross-coupling magnetic flux saturation","authors":"H. Nagura, Y. Iwaji, J. Nakatsugawa, Norihisa Iwasaki","doi":"10.1109/IPEC.2010.5542095","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5542095","url":null,"abstract":"A new magnetic-flux saturation model has been developed for permanent magnet synchronous motors. In the new model, simple first-order functions Φd(id, iq) and Φq(id, iq) express the relationships between d-q axis currents and each axis magnetic flux, considering magnetic saturation and cross-coupling effects. Taking advantage of these new features, we developed a current controller that introduced the precise inverse model of the motor using the above function. Furthermore, simulations of the proposed current controller were evaluated under ideal conditions without any modeling error. Moreover, it showed, in principle, that the ideal first-order lag characteristic without the current interference between d-q axes could be realized in the conditions of cross-coupling magnetic flux saturation.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127661950","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5542360
Liang-Rui Chen, C. Young, N. Chu, R. Liang, Wen-Ren Yang
A novel high efficiency Current-Shared Photovoltaic Power System (CS-PPS), mainly constructed by the Maximum Power Point Tracking and Power Conditioning System (MPPT-PC), is proposed in this paper. The proposed MPPT-PC can track the MPPT and regulate the load energy condition at the same time for increasing the circuit efficiency and providing stable power to critical loads. A 200W prototype is designed and implemented to assess the performance of the proposed CS-PPSS. Experimental results show that the proposed CS-PPSS can track the maximum power point of the PV panel, regulate the load energy, increase the circuit efficiency, and reduce the circuit cost as we wanted.
{"title":"Current-Shared Photovoltaic Power System","authors":"Liang-Rui Chen, C. Young, N. Chu, R. Liang, Wen-Ren Yang","doi":"10.1109/IPEC.2010.5542360","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5542360","url":null,"abstract":"A novel high efficiency Current-Shared Photovoltaic Power System (CS-PPS), mainly constructed by the Maximum Power Point Tracking and Power Conditioning System (MPPT-PC), is proposed in this paper. The proposed MPPT-PC can track the MPPT and regulate the load energy condition at the same time for increasing the circuit efficiency and providing stable power to critical loads. A 200W prototype is designed and implemented to assess the performance of the proposed CS-PPSS. Experimental results show that the proposed CS-PPSS can track the maximum power point of the PV panel, regulate the load energy, increase the circuit efficiency, and reduce the circuit cost as we wanted.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134486555","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5542119
T. Igarashi, H. Funato, S. Ogasawara, M. Hara, Y. Hirota
Recently, high performance power switching devices realize high performance power converters. High speed turn-on and turn-off switching causes Electro Magnetic Interference (EMI). EMI filters or shieldings will reduce EMI, however, they usually increase the cost and size of power modules. Authors proposed a new method to reduce high-frequency noise at specific frequency bands with modification of switching transient slopes. In this paper, the characteristics of power converter applying the proposed switching transient will be analyzed from the viewpoint of output voltage, controllability.
{"title":"Performance of power converter applied switching transient waveform modification","authors":"T. Igarashi, H. Funato, S. Ogasawara, M. Hara, Y. Hirota","doi":"10.1109/IPEC.2010.5542119","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5542119","url":null,"abstract":"Recently, high performance power switching devices realize high performance power converters. High speed turn-on and turn-off switching causes Electro Magnetic Interference (EMI). EMI filters or shieldings will reduce EMI, however, they usually increase the cost and size of power modules. Authors proposed a new method to reduce high-frequency noise at specific frequency bands with modification of switching transient slopes. In this paper, the characteristics of power converter applying the proposed switching transient will be analyzed from the viewpoint of output voltage, controllability.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124529131","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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