Hysteresis Loop for Ferromagnetic Materials. B r remnant flux or residue flux H c coercive flux or coercivity

Transcription

1 Manetic Materials

2 Hysteresis Loop for Ferroanetic Materials B r renant flux or residue flux H c coercive flux or coercivity

3 Manetization Curves for Hard Materials (I)

4 Manetization Curves for Hard Materials (II) 1T = 10 kgauss, 1A/ = Oe or 1 Oe = 79.6 A/

5 Hard Manetic Material Properties Fro Yeadon Handbook of Sall Electric Motors

6 cross section area A Fro Load line: Hard Material Circuit Analysis (1) F _ + B d Actual direction of H B B A B A A B A B 0 d cross section area A A A H H c Device line: B =(B r /H c )(H +H c ) = r H +B r H F H d H H H d d Fro anetic circuit H F H F F 0 B B r B 0 H 0 B B d H H 0

7 cross section area A F Fro Hard Material Circuit Analysis (2) _ + B B d A B A B 2 Fro B 0 H B 0 H B 0 ( H B ) A Vol ap d Actual direction of H Vol a cross section area A 0 Vol ( H ap B B ) axiu BH product 2 d H c B A A H d A H B r Vol B B The required volue of anet can be iniized by operatin the anet at the point of axiu BH (or enery) product. a H Device line: B = r H +B r

8 Hard Material Equivalent Circuit B B H r 0 r BA BA AH r 0 r r Load Line: B H d P c A A 0 H P c is called pereance coefficient 0 where F R r BA r r A d H d R A r 0 r d 0 r F Hd P c d A A / A A / d R R P P d r F

9 Loaded PM Circuit B B r B R H d H Ni d H H Ni 0H c 0HR 0 H B A B A A A A N B B H P H i A A A 0 0 c 0 AC load line

10 Special Operation of Hard Material (a) Operation at reanence (S.C.); (b) Operation at coercivity (O.C.) D. Hanselan, Brushless Peranent anet Motor Desin, 2 nd Edition, p. 36, Mana Physics Publishin, 2006.

11 Influence of Teperature B ( T) B ( T ) ( T T ) r r 0 B 0 D. Hanselan, Brushless Peranent anet Motor Desin, 2 nd Edition, p. 37, Mana Physics Publishin, 2006.

12 Soft Manetic Materials Ferrite aterials Carbon steels Silicon steels Hih saturation alloys Aorphous ferroanetic alloys Soft anetic powder coposites Nanostructured aterials

13 Soft Manetic Material Properties Fro Yeadon Handbook of Sall Electric Motors

14 Ferrite Materials (1) 3C81 is fro Philips, USA. Philips Coponents, 3C81Material Grade Specification, 1997

15 Ferrite Materials (2) 3F3 is fro Philips, USA. Philips Coponents, 3F3Material Grade Specification, 2000

16 Ferrite Materials (3) 4F1 is fro Philips, USA. Philips Coponents, 4F1Material Grade Specification, 2000

17 Carbon Steel Manetic Enineerin Forus Maxwell SV Software

18 Carbon Steel Manetic Enineerin Forus Maxwell SV Software

19 Carbon Steel Manetic Enineerin Forus Maxwell SV Software

20 Nonoriented Silicon Steel Fe-Si alloys with rando orientation of crystal cubes and practically have the sae properties in any direction in the plane of the sheet. Arco M-19 M-19 eans core losses shall be below 1.9 W/lb at 1.5 T and 60 Hz. J. F. Gieras, Advanceents in Electric Machines, Spriner, 2008.

21 Arco M-27, 36 and 43

22 Hih Frequency Electric Steel (1) To reduce core loss, lainations with thin aues are anufactured. Arnon TM 5 is fro Arnold Manetic Technoloies Corp., Rochester, NY, USA.

23 Hih Frequency Electric Steel (2) Coent Power Ltd., Newport, UK. J. F. Gieras, Advanceents in Electric Machines, Spriner, 2008.

24 Hih Saturation Alloys Fe-Co alloys with Co contents fro 15 to 50% have the hihest known saturation flux density and hihest Curie teperature of any alloy faily.. Hiperco50 is fro Carpenter, USA.

25 Hiperco50 Core Loss

26 Vacoflux50 B-H curve Vacoflux50 is fro Vacuuschelze, Hanau, Gerany.

27 Aorphous Ferroanetic Materials (1) J. F. Gieras, Advanceents in Electric Machines, Spriner, 2008.

28 Aorphous Ferroanetic Materials (2)

29 Soft Manetic Powder Coposites (1) Soft anetic powder coposites are coposed of iron powder, dielectric (epoxy resin) and filler (lass or carbon fibers) for echanical strenthenin. Accucore fro TSC Ferrite International, Wadsworth, IL.

30 Soft Manetic Powder Coposites (2) Soaloy TM 500 fro Höanäs, Sweden.

31 Soft Manetic Powder Coposites (3) Soaloy TM 500 fro Höanäs, Sweden.

32 Soft Manetic Nanocrystalline Coposites