JFEスチールにおける無方向性電磁鋼板の最近の進歩

1 JFE No. 36. 2015 8 p. 6-11. JFE . Recent Development of Non-Oriented Electrical Steel in JFE Steel ODA Yoshihiko JFE . OKUBO Tomoyuki JFE . TAKATA Masaaki JFE .. JFE 1954 . HEV EV .. JNE JNP .. JNEH JNT . Abstract: Since the first production of cold rolled non-oriented electrical steel strip in 1954, JFE Steel has developed various kinds of electrical steels for use as a core material for motor applications. In recent years, the application of this material ranges from automobile usage such as hybrid electric vehicle (HEV)/electric vehicle (EV) traction motors for vehicles to appliances and other applications such as electric power steering motors, high efficiency air-conditioner compressor motors, vacuum cleaner motors, energy ef ficient induction motors, and hydraulic/thermal power generators.

2 Responding to customer demands, JFE Steel has further diversified properties of cold rolled non-oriented . electrical steel sheets. In this paper, we introduce distinctive products such as the JNE series for energy efficient . motors, the JNP series for high torque motors, the JNEH series for high frequency motors as well as the JNT. series for high speed rotors. 1 . RP 1985 . 1 . 6 .. 1 50 RMA . 1 1990 .. JFE .. - JNE .. JNEH .. JNP .. JNT .. JFE 1954 2 HEV/EV . 1978 . HEV/EV . 50RM270 1983 50RM250. 1997 HEV . 2015 1 8 . 6 . Copyright 2015 JFE Steel Corporation. All Rights Reserved. JFE . Requirement for material at high torque Thickness: mm Magnetic flux density, B50 (T). High magnetic flux density High saturation magnetization 35 JNE -Series High Hightorque torque Requirement for material at high speed Torque Starting Low iron loss at high frequency Accelerating Hill-climbing High strength 35JN-Series High fatigue strength High thermal conductivity High High efficiency High speed High speed efficiency City driving High way driving 10 15 20 25 30.

3 Iron loss, W10/400 (W/kg). Speed 2 . 1 . HEV . Fig. 2 Magnetic properties of non-oriented electrical steel sheets for energy efficient motor Fig. 1 Demands for hybrid electric vehicle (HEV) motors and core materials 240. Thickness: mm 220. Vickers hardness, HV. 35JN-Series 200. HEV . 180. 35 JNE -Series 160. HEV HEV . 2 140. 1 . 120. 10 15 20 25 30. Iron loss, W10/400 (W/kg).. 3 - . Fig. 3 Vickers hardness of non-oriented electrical steel sheets for energy efficient motor . IPM . 100 . 110 . 3, 4 .. 2 JNE - . 2 . JN JNE . - . 3 JNE . JNE JN .. JNE . JNE . HEV/EV / . HEV .. JNP .. Si HEV/EV . Si 3 Si .. Si - JNP . 5 . - .. Si Al 4 JNP JNE . 7 JFE No. 36 2015 8 . JFE . T . JNP kW IPM.

4 Si Al Mn 5 . 1 250 r/min 60 km/h . 5 . 35 JNP5 . 35JN250 . HEV/EV . HEV .. JNEH .. EV HEV . 6 7 .. 1 2 . 8 .. W (p Bm f t)2/6r 1 . Magnetic flux density, B50(T). 35 JNP Series 35 JNP5 Bm f t r .. 35 JNE Series . 35 JNP7. 1 .. 2 . 35JN series 35JN250 6 .. 14 16 18 20 22 24 9 . Iron loss, W10/400(W/kg) . 7 mm . 4 JNP 20 30 .. Fig. 4 Magnetic properties of JNP series 100 3 Si Steel Saturation magnetization (T). 1 250 r/min (125 Hz) 90. Iron loss, W10/1k (W/kg). 35 JNP5 80. Torque (Nm). 70. 60. 50 35JN250. 40 87 88 89 90 91 92 Motor efficiency ( ) Thickness (mm). 5 6 . Fig. 5 Motor properties of 35 JNP5 used for the direct drive Fig. 6 Effect of thickness on iron loss and saturation motor magnetization JFE No.

5 36 2015 8 8 . JFE . 35. 35 JNE -Series Iron loss, W10/400 (W/kg). Magnetic flux density, B50(T) mm Thick 30. 35 JNT590T. Thin-gauge 35JN Series electrical steel 25 35 JNE-S. 30 JNE. 25 JNE mm mm 20. 35 JNE . 35JN-Series 15 Series 20 JNEH1200 mm Thick mm 10. 100 200 300 400 500 600 700. 5 10 15 20 25 Yield strength, YS (MPa). Iron loss, W10/400 (W/kg). 9 - . 7 Fig. 9 Magnetic and mechanical properties of high-strength Fig. 7 Magnetic properties of thin-gauge electrical steel sheets electrical steel sheets 1 . Table 1 Magnetic and mechanical properties of high-strength electrical steel sheets Magnetic Yield Tensile Iron loss, Vickers Dy Grade W10/400. flux density, strength, strength, hardness, B50 YS TS.

6 (W/kg). (T) (MPa) (MPa). HV. 35JN250 17 397 517 213. 35 JNE-S 23 480 570 205. JNT . 35 JNT590T 29 590 640 220. IPM 8 .. 35 JNE-S 2 35 JNT590T 5 .. 7 . 3 EPS .. HEV/EV. 9 1 EPS . 35 JNE-S 35 JNT590T EPS 3 5 . 10, 11 .. EPS. Bridge . EPS . EPS . 2020 2012 6550 . Magnet . 12 .. Stator Rotor EPS . 8 IPM .. 13 . Fig. 8 Schematic diagram of interior permanent magnet (IPM).. motor . 9 JFE No. 36 2015 8 . JFE . 50 Hysteresisloss Erectric power steering (EPS) type: Column Motor type Brush direct current (DC) Brush loss Bearing loss Loss torque (mN m). 40. 30 50JN1000. 50JN700. 20. 50 JNE300. 10. 0 0. Loss torque 50A1000 1 . Hysteresis loss, W10 (J/kg) 12 EPS . 50JN1000 1 . 10 Fig. 12.. Loss torque of JNE series used for the EPS motor Fig.

7 10 Relationship between hysteresis loss of core materials (Loss torque is normalized by the value of 50JN1000). and loss torque of electric power steering (EPS) motors 4 . Hysteresis loss (J/kg). 1 . 25 . JN Series ( mm) CO2 .. JNE Series 2006 APF Annual performance factor . ( mm). APF .. 15 . APF . Iron loss, W15/50 (W/kg).. 11 JNE . Fig. 11 Hysteresis loss of non-oriented electrical steel sheet . for energy efficient motors .. 10 EPS . DC . 9 . 16 . 1 . 2 .. EPS 2011 . 17 . 11 JN JNE 2015 4 IE3 . 2 . JNE JN . EPS . JNE EPS . 18 . DC . 14 . 12 50JN1000 . 1 JNE . 19 .. JNP 13 mm 50 Hz .. JNE JNP JNE .. EPS JNP - .. JFE No. 36 2015 8 10 . JFE . 6 . 35 JNP Series Magnetic flux density, B50(T).

8 35 JNE Series .. 35JN Series JFE .. Iron loss, W15/50 (W/kg) . 13 JNE JNP . 1 . Fig. 13 Magnetic properties of JNE series and JNP series in 2009, p. 13. commercial frequency 2 Oda, Y.; Kohno, M.; Honda, A. Journal of magnetism and magnetic materials. 2008, vol. 30, no. 20, p. 2430-2435. 3 2001, vol. 33, no. 2, p. 5 92. 4 A . 2003, vol. 123, no. 1, p. 83-88. 5 . 2011 2011, vol. 50, p. 33-35. 6 1992. 7 Kamiya, M. The 2005 International Power Electronics Conference. 2005, 20 . p. 1474-1481. 8 Golding, E. W. Electrical Measurement and Measuring Instruments. 5th . ed. London Pitman, 1963. 9 Hiura, A.; Oda, Y.; Tomida, K.; Tanaka, Y. J. Phys. 4. 1998, vol. 8, Pr2, p. 499-502. 10 1997, no.

9 514, p. 47. 11 Koyo Engineering Journal. 1998, no. 153, p. 28. 1 . 2 12 . 2013.. 3 . 13 . 1996, vol. 70, no. 9, p. 923-928. 50JN230 35JN200 14 NKK 2002, vol. 178, p. 16-20. 14 15 2014 . 16 2011, p. 1. 17 2013, p. 4. 18 2013, vol. 77, no. 4, p. 187-191. 19 D 1987, vol. 107, no. 9, p. 1153-1158. Magnetic flux density, B50(T). 20 2014, vol. 88, no. 9, p. 526-531. 35JN Series 50JN Series 50JN230. 35JN200. Iron loss, W15/50(W/kg). 14 . Fig. 14 Magnetic properties of generator core materials . 11 JFE No. 36 2015 8 . Copyright 2015 JFE Steel Corporation. All Rights Reserved.