論文 - 小坂 卓
-
State-of-art of research and development of vehicle motors 査読あり
T. Kosaka, M. Arata, H. Arita, K. Sakai, A. Sanada and M. Maemura
Proc. of 2013 IEEE 5th IEEE Annual International Energy Conversion Congress and Exhibition, ECCE Asia Downunder (ECCE Asia) 153 - 158 2013年06月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper overviews recent trend of research and development of main traction motors for automotive application in Japan. The main traction motors must be with high torque and power densities, wider torque-speed operating range and high efficiency under frequent operating conditions. As high performance motor candidates, novel ones with variable machine constant employing a change of a number of turns and remnant of permanent magnet are proposed by many researchers. In other circumferences, many researchers also pay attentions to developments of non- or less-permanent magnet machines because of risks of cost-up and undersupply of rare-earth materials.
-
PWM-based Instantaneous Current Profile Tracknig Control for Torque Ripple Suppression in Switched Reluctance Servomotors 査読あり
H.Makino, T.Kosaka, N.Matsui, M.Hirayama and M.Ohto
Proc. of 2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS) 1055 - 1060 2013年04月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper proposes instantaneous current profile
tracking control for minimizing torque ripple of switched reluctance
motors. Because of its unique principle of torque generation
different from conventional AC motors, instantaneous current
profiling control is essential to regulate the torque with
ripple minimized. In addition, since its conventional motor model
in order to determine an adequate applied voltage reference is
established not yet, a hysteresis current regulator is generally
employed, in which it is rather difficult to design switching frequency
of converter. In the proposed scheme, the controller can
calculate the adequate applied voltage reference which can determined
based on the voltage equation derived from non-linear
magnetizing curve model. The applied voltage reference is realized
under conventional subharmonic PWM with a carrier frequency
of 12 KHz and fixed DC-voltage of 283V. The experimental
results using 400W test motor with 8/6 poles configuration
verify that the measured instantaneous current profiles well
follow the reference profiles. -
Precise pulsewise current drive of SRM under PWM control 査読あり
Y. Kuwahara, H. Ono, T. Kosaka, N.Matsui, and H. Shimada
Proc. of 2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS), 1049 - 1054 2013年04月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
In this paper, precise pulsewise current drive for
switched reluctance motor under subharmonic PWM voltage
control is presented. Different from the conventional hysteresis
current control, sub-harmonic PWM scheme enables to design
switching frequency of converter. However, subharmonic PWM
voltage control requires adequate voltage references, that is,
PWM duty ratios according to given operating conditions. In the
proposed control, the adequate voltage references are calculated
from an analytical model of non-linear magnetizing curves of
target motor. Some experimental investigations using 20kW
SRM into drive performances under the proposed control are
made from the viewpoints of torque ripple and vibration. -
Design of saliency-based sensorless drive IPM motors for hybrid electric vehicles 査読あり
Yoshiaki Kano, Takashi Kosaka, Nobuyuki Matsui, Tomoya Takahashi, Masami Fujitsuna
Proceedings of IEEE Energy Conversion Congress and Exposition 4362 - 4369 2012年09月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper presents the design of concentrated winding IPMSM under the saliency-based sensorless drive using a high-frequency signal injection. The finite element (FE) analysis is used to examine the feasible region of the sensorless drive in consideration of the cross-coupling magnetic saturation and the space harmonics. The reliability of the feasible region is verified by experiment using two prototypes. Then, the influence of the IPM motor geometry on the feasible region is examined. Consequently, the design guideline is established to obtain a suitable motor geometry which can maximize the torque capability and stability of the sensorless drive. Under the restricted specifications of dimensions and requirements, the 100Nm-10kW 12-pole-18slot IPMSM is optimally designed for HEV applications. The validity of the proposed design is verified using the MATLAB/SIMULINK based dynamic simulator
-
Signal-injection-based sensorless IPM traction drive for wide-torque range operation at low speed 査読あり
Yoshiaki Kano, Takashi Kosaka, Nobuyuki Matsui, Tomoya Takahashi, Masami Fujitsuna
Proceedings of IEEE Energy Conversion Congress and Exposition 2284 - 2291 2012年09月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
Generally, the sensorless control technique based on the high-frequency voltage signal injection method is used to detect the rotor position of an interior permanent magnet synchronous motor (IPMSM) at the low-speed region. However, this technique does not work well at heavy load conditions, because the rotor incremental saliency decreases due to magnetic saturation. Here we present a high-frequency signal injection-based sensorless control approach, which is applicable over a wide range of torques. The proposed approach makes use of beneficial inductance phenomena appearing in the IPMSM under heavy load operations. The results of our experiments using a 36 kW-350 Nm IPMSM show that the proposed sensorless drive meets the requirements for the target HEV application.
-
Sensorless-Oriented Design of Concentrated-Winding IPM Motors for HEV Drive Application 査読あり
Y.Kano, T.Kosaka, N.Matsui, M.Fujitsuna
Proceedings of the 2012 XXth International Conference on Electrical Machines 2709 - 2715 2012年09月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
We present the design of a saliency-based sensorless drive interior permanent magnet synchronous motor (IPMSM) for a traction drive in hybrid electric vehicles (HEVs), and we introduce the sensorless safety operation region (SSOR), which accounts for cross-coupling magnetic saturation and harmonics of inductance distributions. The SSOR defines a working point under the maximum torque per ampere (MTPA) trajectory in which the motor can perform sensorless operation with a guaranteed performance in the steady state. The reliability of the SSOR was verified by experiments using two prototypes. The influence of the IPM motor geometry on the SSOR was then examined. Consequently, the design guidelines were established to obtain a suitable motor geometry that can maximize the torque capability and the stability during the sensorless drive. Under the restricted specifications of dimensions and requirements, the 100 Nm-10 kW 12-pole, 18-slot IPMSM is optimally designed for the target traction drive in HEVs. The validity of the proposed design was verified using a MATLAB/SIMULINK-based dynamic simulator.
-
Design Study and Experimental Analysis of Wound Field Flux Switching Motor for HEV Applications 査読あり
Erwan Bin Sulaiman, Takashi Kosaka and Nobuyuki Matsui
Proceedings of the 2012 XXth International Conference on Electrical Machines 1269 - 1275 2012年09月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper presents design study, optimization and performance analysis of wound field flux switching machine with non-rare-earth magnet for hybrid electric vehicle drive applications. The stator of proposed machine consists of iron core made of electromagnetic steels, armature coils and field excitation coils as the only field mmf source. The rotor is composed of only stack of iron and hence, it is robust and suitable for high speed operation. The design target is a machine with the maximum torque and power density, and the maximum speed more than 210Nm and 3.5kW/kg, and 20,000r/min, respectively, which competes with interior permanent magnet synchronous machine used in an existing hybrid electric vehicle. Deterministic optimization method is applied to design the proposed machine until the target performances are achieved. Some experimental studies using a prototype of the finally designed machine are demonstrated to validate the effectiveness of the proposed machine.
-
Design Optimization and Perfromance of Novel 6-Slot 5-Pole PMFSM with Hybrid Excitation for Hybrid Electric Vehicle （共著） 査読あり
Erwan Sulaiman, Takashi Kosaka, Nobuyuki Matsui
電気学会論文誌D 132 ( 2 ) 211 - 218 2012年02月
記述言語：英語 掲載種別：研究論文（学術雑誌）
This paper presents an investigation into design possibility of 6-slot 5-pole PMFSM with hybrid excitation for traction drives in HEVs. An improved design is examined to gain a better performance in its maximum torque and power production. The final designed machine enables to keep much power density compared to existing IPMSM installed on the commercial SUV-HEV.
-
High Power Density Design of 6-Slot-8-Pole Hybrid Excitation Flux Swicthing Machines for Hybrid Electric Vehicles （共著） 査読あり
E. Sulaiman, T. Kosaka, N. Matsui
IEEE Transactions on Magnetics 47 ( 10 ) 4453 - 4456 2011年10月
記述言語：英語 掲載種別：研究論文（学術雑誌）
This paper deals with a 6-slot-8-pole hybrid excitation flux switching machine, in which both permanent magnets and wound field excitation are employed as magnetomotive force sources. This machine has all active parts on the stator body and a rugged rotor structure similar to that of swicthed reluctance motor suitable for high-speed operation. Some design parameter refinments are conducted to the machine in order to evaluate maximum torque capability and maximum power density as much as possible under given design requirement and constraints. As a result, it is demonstaated that the machine desgined becomes a good candidate for the target HEV drive application.
-
Design Reconsiderations of High Speed Permanent Magnet Hybrid Excitatiion Motor for Main Spindle Drive in Machine Tools Based on Experimental Results of Prototype Machine（共著） 査読あり
Muthubabu Sridharbabu, Takashi Kosaka, Nobuyuki Matsui
IEEE Transactions on Magnetics 47 ( 10 ) 4469 - 4472 2011年10月
記述言語：英語 掲載種別：研究論文（学術雑誌）
This paper presents design reconsiderations of the proposed permanent magnet hybrid excitation motor (HEM) for high-speed main spindle drive in machine tools based on detailed analyses of experimental results obtained using prototype machine.
-
Parameter optimization study and performance analysis of 6S-8P permanent magnet flux switching machine with field excitation for high speed hybrid electric vehicles （共著） 査読あり
Erwan Sulaiman, Takashi Kosaka, Nobuyuki Matsui
Proc. of 14th European Conference on Power Electronics and Applications 2011年08月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
Over the past decade, many automotive companies have been commercializing HEVs. Most of them employ interior permanent magnet synchronous machine (IPMSM) using rare-earth magnet as their main traction drives from viewpoints of high torque and power density and high efficiency over most of operating torque-speed ranges. However, since all permanent magnets (PMs) are located on rotor part, a design approach to ensure mechanical strength of the rotor depends on rib thickness and number of bridges between PMs. The increase in the number of bridges improves the mechanical strength, but reduces the maximum torque of the machine due to an increase in leakage flux of PM. To overcome this problem, 6S-8P permanent magnet flux switching machine with additional field excitation coil is presented. The proposed machine has all active parts on the stator body and a rugged rotor structure suitable for high speed operation. Some design parameter refinements are conducted to this machine in order to elevate maximum torque and maximum power densities. As a result, it is shown that the proposed machine after the design refinements becomes a good candidate for target HEV drive applications.
-
A new structure of 12Slot-10Pole field-excitation flux switching synchronous machine for hybrid electric vehicles（共著） 査読あり
Erwan Sulaiman, Takashi Kosaka, Nobuyuki Matsui
Proc. of 14th European Conference on Power Electronics and Applications 2011年08月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper presents a new structure of 12Slot-10Pole field-excitation flux switching synchronous machine (FEFSSM) with all active parts namely field excitation coil (FEC) and armature coil are located on the stator, applied for hybrid electric vehicles (HEVs). The rotor part consists of single piece iron makes it more robust and becoming more suitable to apply for high speed motor drive system application coupled with reduction gear. The design target is the motor with a maximum torque of 210Nm with reduction gear ratio of 4:1, a maximum power of 123kW, a maximum power density more than 3.5kW/kg, and a maximum speed of 20, 000r/min with similar restrictions and specifications in IPMSM used for LEXUS RX400h. The deterministic design optimization approach is used to treat design parameters defined in rotor, armature and FEC repeatedly until the target performances are achieved, under maximum current density 21A/mm2 for both armature and FEC. A result shows that the proposed design enables to keep the same power density in existing IPMSM installed on a commercial SUV-HEV.
-
A novel hybrid excitation flux switching synchronous machine for a high-speed hybrid electric vehicle applications（共著） 査読あり
Erwan Sulaiman, Takashi Kosaka, Nobuyuki Matsui
Proc. of the 2011 International Conference on Electrical Machines and System 2011年08月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
Hybrid excitation machines (HEMs) that consist of permanent magnet (PM) and field excitation coil (FEC) as their main flux sources has several attractive features compared to interior permanent magnet synchronous machines (IPMSM) conventionally employed in hybrid electric vehicles (HEVs). Among various types of HEM, the machine with both permanent magnet and field excitation coil located on the stator has the advantage of robust rotor structure similar as switch reluctance machine (SRM). In addition, the variable flux control capabilities from field excitation coil make this machine becoming more attractive to be applied for high-speed motor drive systems, coupled with reduction gear. This HEM can be categorized as hybrid excitation flux switching synchronous machine (HEFSSM). In this paper, a novel 12Slot-10Pole HEFSSM where the field excitation coil is wounded in radial direction in the stator is proposed for traction drives in HEVs. The design target of the proposed machine is a maximum torque of 210Nm with reduction gear ratio of 4:1, a maximum power of 123kW, a maximum power density more than 3.5kW/kg, and a maximum speed of 20,000r/min with similar restrictions and specifications in IPMSM used for LEXUS RX400h. The deterministic design optimization method based on 2D-FEA is used to treat design parameters defined in rotor, armature coil slot and field excitation coil slot until the target performances are achieved, under maximum current density condition for both armature coil and field excitation coil. The final results show that the final design HEFSSM is able to keep the same torque density in existing IPMSM installed on a commercial SUV-HEV.
-
Design studies of hybrid excitation motor for main spindle drive using 3D-FEA applying manufacturing constraints （共著） 査読あり
Muthubabu Sridharbabu, Takashi Kosaka, Nobuyuki Matsui
Proc. of the 2011 International Conference on Electrical Machines and System 2011年08月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper presents detailed design studies of the proposed permanent magnet hybrid excitation motor (HEM) for high-speed main spindle drive in machine tools based on results obtained from experiment using prototype motor. The proposed HEM has been intentionally designed using 3D-FEA for the target application. Although the basic working principle of HEM has been proven by the experimental results, the induced voltage waveforms measured have shown a large deviation from those computed by 3D-FEA due to 5th harmonics. This has been a primary factor which has degraded the drive performances of test machine. After checking the differences between the designed drawing and real prototype motor, design studies are conducted to the tested HEM using 3D-FEA. As a result, the stator parameters such as, the stator pole shoe arc angle, the stator teeth, are studied for relatively good agreement with the tested results.
-
Design analysis and improvement high speed hybrid excitation motor for main spindle drive in machine tools based on experimental results of prototype machine（共著） 査読あり
Muthubabu Sridharbabu, Takashi Kosaka, Nobuyuki Matsui
Prof. of the 2011 International Conference on Power Electronics and ECCE Asia 1935 - 1939 2011年05月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper presents design analysis and improvement of the proposed high speed hybrid excitation motor (HEM) for main spindle drive in machine tools based on experimental results obtained using prototype motor. The proposed HEM is intentionally designed using 3D-FEA for target application taking into account of practical design constraints. The basic working principle and the unique field weakening control method of the proposed HEM are studied from the prototype machine. The influence of manufacturing constraints in the design parameters of the motor are studied carefully and an improved design of the proposed HEM is analyzed. In particular, the induced voltage distortion, magnetic flux saturation in the stator pole shoe have been a major factor which has impact in the performance of the test machine, are considered in the improvement of machine design.
-
Experimental Studies on Drive Performances of Less Rare-Earth PM Hybrid Excitation Motor（共著） 招待あり 査読あり
Takashi Kosaka, Takaaki Hirose, Nobuyuki Matsui
Prof. of the 2011 International Conference on Power Electronics and ECCE Asia 161 - 168 2011年05月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper presents feasibility studies on hybrid excitation motor (HEM) as a candidate of less rare earth permanent magnet and high power density machine for hybrid electric vehicle drives. The construction, the basic working principle focusing on variable field control capability and the design concept of HEM are overviewed. After making the design restrictions and specifications clear, the drive performances of HEM designed are evaluated based on 3D-FEA. As a result, the proposed motor makes possible to reduce the volume of rare permanent magnet by approximately half of that used in existing interior permanent magnet synchronous motor for LEXUS RX400h while keeping the power density intact. With comparisons between the measured and the computed drive performances of the trial manufacturing of the downsized motor, it is verified that HEM becomes an attractive candidate as a less-rare-earth permanent magnet and high power density motor for HEV drives.
-
Design optimization of 12Slot-10Pole hybrid excitation flux switching synchronous machine with 0.4kg permanent magnet for hybrid electric vehicles 査読あり
Erwan Sulaiman, Takashi Kosaka, Nobuyuki Matsui
Prof. of the 2011 International Conference on Power Electronics and ECCE Asia 1913 - 1920 2011年05月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
Hybrid excitation flux switching synchronous machine (HEFSSM) has several attractive features compared to interior permanent magnet synchronous machines (IPMSM) conventionally employed in hybrid electric vehicles (HEV). Among various types of HEFSSM, the machine with both permanent magnet (PM) and field excitation coil (FEC) on the stator has the advantages of robust rotor structure together with variable flux control capabilities that make this machine becoming more attractive to apply for high-speed motor drive systems. This paper presents an investigation into the design possibility and parameter optimization study of 12Slot-10Pole HEFSSM for traction drives in HEV The research target is to design a machine with reduced amount of rare-earth magnet, a maximum torque of 210Nm, a maximum power of more than 123kW, and a maximum power density of more than 3.5kW/kg. Extensions in speed and torque ranges are chosen for optimization aims. The deterministic design approach is used to treat ten design parameters in an effort to achieve the target performances. As a result, the designed HEFSSM with 0.4kg PM is able to get much higher power density compared to existing IPMSM installed on a commercial SUV-HEV.
-
Design Studies on Hybrid Excitation Motor for Main Spindle Drive in Machine Tool（共著） 査読あり
Takashi Kosaka, Sridharbabu Muthubabu Masayoshi Yamamoto, Nobuyuki Matsui
IEEE Transactions on Industrial Electronics 57 ( 11 ) 3807 - 3813 2010年11月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
工作機械主軸用高速モータに好適な新たなモータ形式として，永久磁石と界磁コイルを界磁源として併用したハイブリッド界磁モータを提案している。基本設計法を述べ、主軸用モータとして要求性能の観点から，提案モータの優位性について検討している。
-
Design and Performance of 6-Slot 5-Pole PMFSM with Hybrid Excitation for Hybrid Electric Vehicle Applications（共著） 査読あり
Erwan Sulaiman, Takashi Kosaka, Nobuyuki Matsui
Proc. of the 2010 International Power Electronics Conference ( 23E3-3 ) 1962 - 1968 2010年06月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
ハイブリッド自動車駆動用モータとして，永久磁石と界磁巻線とを界磁源として併用し，電機子巻線を含む全てのコイル，磁石を固定子側へ配した６スロット－５突極のハイブリッド界磁フラックススイッチングモータを提案し，３次元有限要素磁場解析による基本設計法と性能評価を示し、その有用性を検証している。
-
Brushless Synchronous Machines with Wound-Field Excitation using SMC Core Designed for HEV Drives（共著） 招待あり 査読あり
Takashi Kosaka, Takaaki Hirose, Nobuyuki Matsui
Proc. of the 2010 International Power Electronics Conference ( 23G2-1 ) 1794 - 1800 2010年06月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
ハイブリッド自動車駆動用モータとして，省レアアース高出力密度のブラシレスハイブリッド界磁モータ，レアアースレス高出力密度モータのブラシレス巻線界磁形同期モータを提案している。ハイブリッド界磁モータについて、試作機試験結果を示し、その有用性を検証している。
