Soft magnetic materials of TOHO ZINC *Dust core? *Use dust core efficiently Toho Technical Center TOHO ZINC CO., LTD.
Typical soft magnetic materials
Comparison of dust core and ferrite Ferrite HK: Sendust HKB: Sendust Hi B HM: Amorphous dust MK: MPP dust HF: Hi flux dust SK: Pure iron dust HK HKB HM MK HF SK
Frequency chracteristic Electrical steel core Pure iron dust Amorphous dust Sendust Ferrite
DC Bias characteristic of dust core and Ferrite core B
Temperature characteristic (1) 160 140 120 Change rate of permeability (%) 0 80 60 40 20 0-60 -40-20 0 20 40 60 80 0 120 140 160-20 -40 HK Ni-Zn(850) Mn-Zn(5000) -60 Temperature (deg.c.)
Temperature characteristic (2) 8 6 Change rate of permeability (%) 4 2 0-60 -40-20 0 20 40 60 80 0 120 140 160-2 -4-6 HKB HK MPP(125) HF(125) SK HM -8 - Temperature (deg.c.)
Example of a core loss calculation Vin Vout VL ) 16.7( 1.37 12.2 ) / 12.2( 0 14.55 2.848 ( ) 29.1( ) 0.0291 ( 50 0.275 2 5) (25 ) (, 1.37, 0.275 ), 50 ( 50Turns core, HK12S : 2, 0, 5, 25 : 1.5980 2.0950 5 4 6 2 mw Pfe cc mw P f B C f B C P mt T B N Ae Ton Vout Vin B Then cc Ve cm Ae Turns N Winding S Ton khz f V Vout V Vin Conditions b a b a VL Vin-Vout -Vou t Ton Tof f
Approximate formula and parameter for a core loss calculation P[mW/cc]= C B [mt] a F [khz] b Materials a b C SK 1.9897 1.4332 6.375E-04 HK 2.0950 1.5980 2.848E-05 HKL 2.1252 1.5449 4.177E-05 HKS 2.1167 1.6161 2.098E-05 HKH 2.0967 1.5817 2.527E-05 HKBL 1.9782 1.4878 1.344E-04 HKBS 2.0075 1.5256 8.381E-05 HKBH 1.9992 1.4845 1.068E-04 HM 2.0148 1.7221 1.828E-05 MPP(60) 2.1917 1.5341 2.434E-05 MPP(90) 2.1899 1.5322 2.823E-05 MPP(120) 2.23 1.5706 2.147E-05 HF(60) 2.0323 1.5530 1.234E-04 HF(125) 2.1168 1.5695 4.805E-05
Example of an inductance calculation under DC Bias A DC at H H L Le e Ae N L e m AT f e d c b a e m AT H Le N I H Then DCBias Winding 5 ) 65.2( ) ( 65.2 4.99 37.7 0.275 50 4 4 37.7 99.8 50 0.00872 50 4.062 50 1.078 50 9.825 50 3.143 ) / ( x : x x x x x ) / 50( 4.99 50 5, DC5A : 0.275cm 4.99cm, Ae Le 50 Turns HK12S core, : 6 2 4 2 7 2 7 2 6 3 9 4 14 5 18 2 3 4 5 2 2
Approximate formula and parameter for an inductance calculation under DC Bias e = a x 5 + b x 4 + c x 3 + d x 2 + e x + f x[at/m] Materials a b c d e f SK 4.620E-18-1.400E-13 1.529E-09-6.725E-06 0.0031 72.9 HK 3.143E-18-9.825E-14 1.078E-09-4.062E-06-0.0087 99.8 HKL 1.552E-18-4.485E-14 4.376E- -1.226E-06-0.0064 58.7 HKS 3.380E-18-9.769E-14 9.567E- -2.782E-06-0.0112 86.7 HKH 3.055E-18-9.065E-14 8.962E- -2.147E-06-0.0181 115.1 HKBL 9.266E-19-2.699E-14 2.669E- -7.292E-07-0.0053 55.4 HKBS 2.405E-18-7.382E-14 8.040E- -3.144E-06-0.0055 83.2 HKBH 2.728E-18-8.196E-14 8.372E- -2.371E-06-0.0148 114.1 HM 3.353E-16-3.614E-12 1.409E-8-2.167E-05-0.002 60.9 MPP(60) 1.293E-19-5.001E-15 9.834E-11-8.939E-07-0.0008 59.4 MPP(90) 1.696E-18-5.479E-14 6.573E- -3.067E-06-0.0041 87.2 MPP(120) 6.825E-18-2.060E-13 2.188E-09-8.293E-06-0.0092 124.2 HF(60) -3.570E-20 1.600E-15-1.6E-11-1.240E-07-0.0002 55.4 HF(125) 3.922E-19-2.362E-14 5.116E- -4.381E-06 0.0039 112.5
Wave form simulation from approximate formula of DC Bias Waveform Minor loop Major loop VL (V) 70 7 60 50 6 40 5 30 20 4 3 0-0 2 4 6 8 12 2-20 1-30 -40 0 Time (us) Hystrisis curve IL (A) 600 500 400 300 200 300 250 0 200 B (mt) 150 0 0 0 2000 4000 6000 8000 000 12000 50 0 0 00 2000 3000 4000 H (AT/m)
Core parameter table (1) 22.41 13.16 6.58 4.47 2.74 1.37 0.96 0.47 0.22 0.09 0.05 Volume cc 146 143 129 148 91 69 70 60 54 31 29 AL value nh 57.1 44.0 33.6 27.2 27.2 20.8 17.3 13.4.3 8.2 6.3 O.D. mm 35.3 27.5 19.8 14.6 14.6 12.4.2 7.7 5.1 4.3 3.5 I.D. mm 15.0 15.0 12.2 11.9 7.3 6.7 6.7 5.4 4.0 2.5 2.5 Ht mm 13.97 1.604 36D.83 1.215 28D 8.01 0.822 20D 6.16 0.726 14D 6.16 0.445 14S 4.99 0.275 12S 4.13 0.232 S 3.15 0.150 08S 2.23 0.0 05S 1.83 0.047 04S 1.45 0.034 03S Le cm Ae cm 2 Size Toroidal core O.D. I.D. Ht HK core
Core parameter table (2) 6.3 3.4 3.4 2.9 5.5 5.1 5.1 4.3 2.1 G mm 36.2 25.4 21.1 19.8 29.5 24.5 20.0 16.0 11.8 E mm 12.4 14.7 12.5 6.2 15.5 9.1 8.1 5.5 5.2 F mm 17.2 11.4 11.4 7.5 19.8.0 11.0 6.0 5.0 C mm 17.2 11.4 9.9 7.5 11.9.1.8 6.0 4.1 D mm 20.9 20.7 17.0 9.2 21.0 15.0 13.4 9.8 7.1 B mm 49.0 35.0 28.0 25.5 42.0 35.3 30.2 24.6 16.0 A mm 22.26.24 6.63 2.16 22.74 7.29 6.73 1.94 0.71 Volume cc 290 140 120 0 300 197 253 129 77 AL value nh 9.72 2.290 49EER 9.45 1.084 35EERL 7.83 0.847 28EERL 5.00 0.432 25EER 9.79 2.323 42EE 6.81 1.070 35EE 5.78 1.165 30EE 4.35 0.445 25EE 3.40 0.209 16EE Le cm Ae cm 2 Size EE, EERL core HK core
Standard power capacity to core size (1)
Standard power capacity to core size (2)
Standard power capacity to core size (3)
Temperature characteristic of core loss (1)
Temperature characteristic of core loss (2)
Winding tuning for loss reduction (1)
Winding tuning for loss reduction (2)
Core,LossLoss