Faculty Information - Katsumi Yamazaki

Office

Present specialized field

Research activities

Works

Home Page

Committee and society

（Last updated : 2025-03-24 13:43:00）

Katsumi Yamazaki
Department of Electrical and Electronic Engineering, Faculty of Engineering

Graduate School of Engineering

Master's Program in Electrical and Electronic Engineering, Graduate School of Engineering

Professor

■ Office

Tsudanuma Campus, No.2 Building,13th floor room 011308

■ Present specialized field

Power engineering (Key Word：Electric Machinery, Numerical Analysis, Electromagnetic field analysis, Rotating machines)

■ Research activities

1.	2010/10～	International Compumag Society
2.	2016/10～	∟ Board Member
3.	1996/03～	IEEE

■ Works

1.	Article	Mechanism of Torque Ripple Generation by Time and Space Harmonic Magnetic Fields in Permanent Magnet Synchronous Motors IEEE Transactions on Industrial Electronics 69(10),pp.9884-9894 (Collaboration) 2022/10/01
2.	Article	Rotor Surface Optimization of Interior Permanent Magnet Synchronous Motors to Reduce Both Rotor Core Loss and Torque Ripples IEEE Transactions on Industry Applications 58(4),pp.4488-4497 (Collaboration) 2022/07/01
3.	Article	Separation of Winding Losses of Permanent Magnet Motors by Considering Eddy Currents and Parallel Circuit Connections IEEE Transactions on Magnetics 57(6),pp.8204304 (Collaboration) 2021/06/01
4.	Article	Parallel Computing of 3-D FEA Including Matrix Preconditioning for Analysis of Rotating Machines Coupled With Circuit Equations IEEE Transactions on Magnetics 57(6),pp.8105304 (Collaboration) 2021/06/01
5.	Article	Induction Motor Analysis by Considering Hysteresis Loops in Stator and Rotor IEEE Transactions on Magnetics 57(6),pp.8203704 (Collaboration) 2021/06/01
6.	Article	Characteristics Improvement of Claw-Pole Alternators for Automobile Applications by Analyzing 3-D Flux Paths in Rotors IEEE Transactions on Industry Applications 56(2),pp.1443-1451 (Collaboration) 2020/04/01
7.	Article	Iron Loss Analysis of Permanent-Magnet Machines by Considering Hysteresis Loops Affected by Multi-Axial Stress IEEE Transactions on Magnetics 56(1),pp.7503003 (Collaboration) 2020/01/01
8.	Article	Fast Estimation of Harmonic Losses Caused by Inverter Carrier in Interior Permanent-Magnet Synchronous Motors by Using Combination of Time- and Frequency-Domain Finite-Element Analyses IEEE Transactions on Magnetics 56(1),pp.7504704 (Collaboration) 2020/01/01
9.	Article	Fast Characteristics Calculation of Large Transformers With Step-Lap Joints by Dividing Regions of Finite-Element Analysis IEEE Transactions on Magnetics 56(1),pp.7504204 (Collaboration) 2020/01/01
10.	Book	Magnetic Material for Motor Drive System (Collaboration) 2019/12/13
11.	Article	Analysis and Reduction of Circulating Current Loss of Armature Wires in Permanent Magnet Synchronous Machines IEEE Transactions on Industry Applications 55(6),pp.5888-5896 (Collaboration) 2019/11/01
12.	Article	Procedure for Optimization of Interior Permanent Magnet Synchronous Motors with Concentrated Windings by Considering End-Leakage Flux IEEJ Journal of Industry Applications 8(5),pp.820-826 (Collaboration) 2019/09/01
13.	Article	Parallel Computing of Finite-Element Analysis Coupled With Circuit Equations for 3-D Eddy Current Analysis of Segmented Transformers by Using Combination of Central and Graphical Processing Units IEEE Transactions on Magnetics 55(6),pp.1300204 (Collaboration) 2019/06/01
14.	Article	Iron Loss Analysis of Permanent Magnet Motors by Considering Minor Hysteresis Loops Caused by Inverters IEEE Transactions on Magnetics 55(6),pp.1300304 (Collaboration) 2019/06/01
15.	Article	Analyses of Circulating-current Loss in Armature Windings and In-plane Eddy-current Loss in Electrical Steel Sheets of Permanent-magnet Synchronous Machines IEEJ Journal of Industry Applications 8(3),pp.452-457 (Collaboration) 2019/05/01
16.	Article	Reduction of Inverter Carrier Harmonic Losses in Interior Permanent Magnet Synchronous Motors by Optimizing Rotor and Stator Shapes IEEE Transactions on Industry Applications 55(1),pp.306-315 (Collaboration) 2019/01
17.	Article	Impact of Core Material Grades on the Performance of Variable Speed Induction Motors Fed by Inverters IEEE Transactions on Industry Applications 54(6),pp.5833-5842 (Collaboration) 2018/12
18.	Article	Analysis and Characteristics Improvement of Claw-Pole Alternators by Reducing Armature Reaction IEEE Transactions on Industrial Electronics 65(11),pp.8740-8748 (Collaboration) 2018/11
19.	Article	Shape Optimization Procedure of Interior Permanent Magnet Motors Considering Carrier Harmonic Losses Caused by Inverters IEEE Transactions on Magnetics 54(3),pp.1300404 (Collaboration) 2018/03
20.	Article	Electromagnetic Field Analysis Considering Reaction Field Caused by Eddy Currents and Hysteresis Phenomenon in Laminated Cores IEEE Transactions on Magnetics 54(3),pp.1300204 (Collaboration) 2018/03
21.	Article	Effects of Multi-Axial Mechanical Stress on Loss Characteristics of Electrical Steel Sheets and Interior Permanent Magnet Machines IEEE Transactions on Magnetics 54(3),pp.1300304 (Collaboration) 2018/03
22.	Article	Characteristics Analysis of Claw-Pole Alternator for Automobiles by Nonlinear Magnetic Field Decomposition for Armature Reaction IEEJ Journal of Industry Applications 6(6),pp.362-369 (Collaboration) 2017/11
23.	Article	Impact of Mechanical Stress on Characteristics of Interior Permanent Magnet Synchronous Motors IEEE Transactions on Industry Applications 53(2),pp.963-970 (Collaboration) 2017/03
24.	Article	3-D Electromagnetic Field Analysis Combined with Mechanical Stress Analysis for Interior Permanent Magnet Synchronous Motors IEEE Transactions on Magnetics 52(3),pp.2000704 (Collaboration) 2016/03
25.	Article	Rotor Shape Optimization for Output Maximization of Permanent-Magnet-Assisted Synchronous Machines IEEE Transactions on Industry Applications 51(4),pp.3077-3085 (Collaboration) 2015/07
26.	Article	Loss Analysis of Induction Motors by Considering Shrink Fitting of Stator Housings IEEE Transactions on Magnetics 51(3),pp.8102994 (Collaboration) 2015/03
27.	Article	3-D Finite Element Meshing for Skewed Rotor Induction Motors IEEE Transactions on Magnetics 51(3),pp.7401704 (Collaboration) 2015/03
28.	Article	Investigation of Additional Harmonic Losses in Induction Motors Driven by PWM Inverters: Variation with Slot Shapes and Load Conditions IEEJ Journal of Industry Applications 3(6),pp.405-413 (Collaboration) 2014/11
29.	Article	Reduction of Rotor Losses in Multi Layer Interior Permanent Magnet Synchronous Motors by Introducing Novel Topology of Rotor Flux Barriers IEEE Transactions on Industry Applications 50(5),pp.3185-3193 (Collaboration) 2014/09
30.	Article	Torque Analysis of Interior Permanent Magnet Synchronous Motors by Considering Cross Magnetization: Variation in Torque Components with Permanent-Magnet Configurations IEEE Transactions on Industrial Electronics 61(7),pp.3192-3201 (Collaboration) 2014/07
31.	Article	Iron Loss Analysis of Interior Permanent Magnet Synchronous Motors by Considering Mechanical Stress and Deformation of Stators and Rotors IEEE Transactions on Magnetics 50(2),pp.7022504 (Collaboration) 2014/02
32.	Article	Output Maximization of Salient-Pole Synchronous Machines by Using Additional Permanent Magnets IEEJ Journal of Industry Applications 2(6),pp.276-282 (Collaboration) 2013/11
33.	Article	A Novel Rotor Design of Interior Permanent-Magnet Synchronous Motors to Cope with Both Maximum Torque and Iron-Loss Reduction IEEE Transactions on Industry Applications 49(6),pp.2478-2486 (Collaboration) 2013/11
34.	Article	Shape Optimization of Induction Machines by Using Combination of Frequency- and Time-Domain Finite Element Methods IEEE Transactions on Magnetics 49(5),pp.2185-2188 (Collaboration) 2013/05
35.	Article	Optimization of High-Speed Motors Considering Centrifugal Force and Core Loss Using Combination of Stress and Electromagnetic Field Analyses IEEE Transactions on Magnetics 49(5),pp.2181-2184 (Collaboration) 2013/05
36.	Article	Circuit Parameters Determination Involving Stray Load Loss and Harmonic Torques for High-Speed Induction Motors Fed by Inverters IEEE Transactions on Energy Conversion 28(1),pp.154-163 (Collaboration) 2013/03
37.	Article	Investigation of Locked Rotor Test for Estimation of Magnet PWM Carrier Eddy Current Loss in Synchronous Machines IEEE Transactions on Magnetics 48(11),pp.3327-3330 (Collaboration) 2012/12
38.	Article	Harmonic Loss and Torque Analysis of High-Speed Induction Motors IEEE Transactions on Industry Applications 48(3),pp.933-941 (Collaboration) 2012/06
39.	Article	Estimation of Assist Effects by Additional Permanent Magnets in Salient-Pole Synchronous Generators IEEE Transactions on Industrial Electronics 59(6),pp.2515-2523 (Collaboration) 2012/02
40.	Article	Characteristics Analysis of Large High Speed Induction Motors Using Finite Element Method IEEE Transactions on Magnetics 48(2),pp.995-998 (Collaboration) 2012/02
41.	Article	Modeling of Salient Pole Synchronous Machines Assisted by Permanent Magnets IEEE Transactions on Magnetics 47(10),pp.3028-3031 (Collaboration) 2011/10
42.	Article	Torque and Loss Calculation of Rotating Machines Considering Laminated Cores Using Post 1-D Analysis IEEE Transactions on Magnetics 47(5),pp.994-987 (Collaboration) 2011/05
43.	Article	Equivalent Circuit Modeling of Induction Motors Considering Stray Load Loss and Harmonic Torques Using Finite Element Method IEEE Transactions on Magnetics 47(5),pp.986-989 (Collaboration) 2011/05
44.	Article	Effect of Eddy-Current Loss Reduction by Magnet Segmentation in Synchronous Motors With Concentrated Windings IEEE Transactions on Industry Applications 47(2),pp.779-788 (Collaboration) 2011/03
45.	Article	Reduction of Magnet Eddy-Current Loss in Interior Permanent-Magnet Motors With Concentrated Windings IEEE Transactions on Industry Applications 46(6),pp.2434-2441 (Collaboration) 2010/11
46.	Article	In-Plane Eddy Current Analysis for End and Interior Stator Core Packets of Turbine Generators The Inernational Journal for Computation and Mathematics in Electrical and Electronic Engineering 29(5),pp.1218-1231 (Collaboration) 2010/10
47.	Article	Iron Loss Model for Rotating Machines Using Direct Eddy Current Analysis in Electrical Steel Sheets IEEE Transactions on Energy Conversion 25(3),pp.633-641 (Collaboration) 2010/09
48.	Article	Shape Optimization of Rotating Machines Using Time-Stepping Adaptive Finite-Element Method IEEE Transactions on Magnetics 46(8),pp.3113-3116 (Collaboration) 2010/08
49.	Article	Iron Loss Modeling for Rotating Machines: Comparison between Bertotti's Three-Term Expression and 3-D Eddy-Current Analysis IEEE Transactions on Magnetics 46(8),pp.3121-3124 (Collaboration) 2010/08
50.	Article	Rotor-Shape Optimization of Interior-Permanent-Magnet Motors to Reduce Harmonic Iron Losses IEEE Transactions on Industrial Electronics 57(1),pp.61-69 (Collaboration) 2010/01
51.	Article	Effect of eddy current loss reduction by segmentation of magnets in synchronous motors: Difference between iterior and surface types IEEE Transactions on Magnetics 45(10),pp.4756-4759 (Collaboration) 2009/10
52.	Article	Loss investigation of interior permanent magnet motors considering carrier harmonics and magnet eddy currents IEEE Transactions on Industry Applications 45(2),pp.659-665 (Collaboration) 2009/04
53.	Article	Rotor Loss Analysis of Interior Permanent Magnet Motors Using Combination of 2-D and 3-D Finite Element Method IEEE Transactions on Magnetics 45(3),pp.1772-1775 (Collaboration) 2009/03
54.	Article	Investigation of eddy current loss in divided Nd-Fe-B sintered magnet for synchronous motors due to insulation resistance and frequency IEEE Transactions on Magnetics 44(11),pp.4269-4273 (Collaboration) 2008/11
55.	Article	Eddy Current Analysis Considering Lamination for Stator Core Ends of Turbine Generators IEEE Transactions on Magnetics 44(6),pp.1502-1505 (Collaboration) 2008/06
56.	Article	An adaptive finite element method for minor shape modification in optimization algorithms IEEE Transactions on Magnetics 44(6),pp.1202-1205 (Collaboration) 2008/06
57.	Article	Development of electromagnetic field analysis for rotating machines Prezegrad elektrotechniczny 2007(3),pp.19-24 (Single) 2007/06
58.	Article	Hi-speed prediction of strict numerical solutions using multi-adaptive-meshing IEEE Transactions on Magnetics 43(4),pp.1477-1480 (Collaboration) 2007/04
59.	Article	Iron loss analysis of interior permanent magnet synchronous motors -Variation of main loss factors due to driving conditions IEEE Transactions on Industry Applications 42(4),pp.1045-1052 (Collaboration) 2006/08
60.	Article	Inter-bar current analysis of induction motors using 3-D finite element method considering lamination of rotor core IEEE Transactions on Magnetics 42(4),pp.1287-1290 (Collaboration) 2006/04
61.	Article	Loss analysis of permanent-magnet motor considering carrier harmonics of PWM inverter using combination of 2-D and 3-D finite-element method IEEE Transactions on Magnetics 41(5),pp.1980-1983 (Collaboration) 2005/05
62.	Article	Stray load loss analysis of induction motors due to harmonic electromagnetic fields of stator and rotor European Transactions on Electrical Power 15(1),pp.299-310 (Single) 2005/04
63.	Article	Stray Load Loss Analysis of Induction Motor -Comparison of Measurement Due to IEEE Standard 112 and Direct Calculation by Finite Element Method IEEE Transactions on Industry Applications 40(2),pp.543-549 (Collaboration) 2004/04
64.	Article	Investigation of Benchmark Model for Estimating Iron Loss in Rotating Machine IEEE Transactions on Magnetics 40(2),pp.794-797 (Collaboration) 2004/04
65.	Article	Calculation of Negative Torque Caused by Slot Ripples of Induction Motors IEEE Transactions on Magnetics 40(2),pp.778-781 (Collaboration) 2004/04
66.	Article	Adaptive Finite Element Meshing for Eddy Current Analysis of Moving Conductor IEEE Transactions on Magnetics 40(2),pp.993-996 (Collaboration) 2004/04
67.	Article	Torque and Efficiency Calculation of an Interior Permanent Magnet Motor Considering Harmonic Iron Losses of Both the Stator and Rotor IEEE Transactions on Magnetics 39(3),pp.1460-1463 (Single) 2003/05
68.	Article	Adaptive Mesh Generation within Nonlinear Iterative Calculations for Analyses of Electric Machines IEEE Transactions on Magnetics 39(3),pp.1654-1657 (Collaboration) 2003/05
69.	Article	Efficiency Analysis of Induction Motor Considering Rotor and Stator Surface Loss Caused by Rotor Movement Int. J. Applied Electromagnetics and Materials 13(1),pp.229-234 (Single) 2002/12
70.	Article	Time-Domain Finite Element Analysis of Remote Field ECT Excited by Pulse Current Electromagnetic Nondestructive Evaluation 4(1),pp.116-123 (Single) 2002/08
71.	Article	An Efficient Procedure to Calculate Equivalent Circuit Parameter of Induction Motor Using 3D Nonlinear Time-Stepping Finite Element Method IEEE Transactions on Magnetics 38(2),pp.1281-1284 (Single) 2002/04
72.	Article	Combined 3-D-2-D Finite Element Analysis of Induction Motors Considering Vairation of Neutral Point Potential in Star Connection IEEE Transactions on Magnetics 37(5),pp.3706-3710 (Collaboration) 2001/09
73.	Article	Transient Eddy Current Analysis for Moving Conductors Using Adaptive Moving Coordinate Systems IEEE Transactions on Magnetics 36(4),pp.785-789 (Single) 2000/07
74.	Article	Comparison of Induction Motor Characteristics Calculated from Electromagnetic Field and Equivalent Circuit Determined by 3D FEM IEEE Transactions on Magnetics 36(4),pp.1881-1885 (Single) 2000/07
75.	Article	Induction Motor Analysis Considering both Harmonics and End Effects Using Combination of 2D and 3D Finite Element Method IEEE Transactions on Energy Conversion 14(3),pp.698-703 (Single) 1999/09
76.	Article	3D Eddy Current Formulation for Moving Conductors with Variable Velocity of Coordinate System Using Edge Finite Elements IEEE Transactions on Magnetics 35(3),pp.1594-1597 (Single) 1999/05
77.	Article	A Quasi 3D Formulation for Analyzing Characteristics of Induction Motors with Skewed Slots IEEE Transactions on Magnetics 34(5),pp.3624-3627 (Single) 1998/09
78.	Article	Modification of 2D Nonlinear Time-Stepping Analysis by Limited 3D Analysis for Induction Machines IEEE Transactions on Magnetics 33(2),pp.1694-1697 (Single) 1997/03
79.	Article	Generalization of 3D Eddy Current Analysis for Moving Conductors Due to Coordinate Systems and Gauge Conditions IEEE Transactions on Magnetics 33(2),pp.1259-1262 (Single) 1997/03
80.	Article	Finite Element Analysis of a Canned Motor Applied Electromagnetics in Material 6,pp.285-288 (Collaboration) 1995/02
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■ Home Page

http://www.eece.it-chiba.ac.jp/teacher/01_professor/yamazaki.html

■ Committee and society

1.	2018/04/01～	International Steering Committee of ICEMS (Internationla confenrence on electric machines and systems) Member
2.	2019/01/01～2019/10/31	2019 IEEE Energy Conversion Congress and Expo (ECCE2019) Topic Chair of Modeling and Analysis Methods
3.	2018/01/01～2018/10/31	2018 IEEE Energy Conversion Congress and Expo (ECCE2018) Topic Chair of Modeling and Analysis Methods
4.	2016/09～2017/07	2017 IEEE International Electric Machines and Drives Conference Topic Chair of Optimization for Electrical Machines
5.	2011/09/01～2013/03/31	ICEMS2012 (International Conference on Electric Machines and Systems) Program committee chair