Thin-gauge silicon steel strips and Applied products silicon steel strips provide superior cost...

NIKKIN DENJI KOGYO Co., Ltd.NIKKIN DENJI KOGYO Co., Ltd.

Thin-gauge silicon steel strips and Applied products

0.1 mm

0.05 mm

渦電流

0.2 mm

0.1 mm

0.05 mm

渦電流

0.2 mm

Con

vent

iona

l si

licon

ste

el st

rips

Th

in-g

uage

silic

on s

teel

stri

ps

Very low core loss can be achieved by usingthin-gauge strips due to its small eddy currents.

0.1 mm

0.05 mm

渦電流

0.2 mm

0.1 mm

0.05 mm

渦電流

0.2 mm

Con

vent

iona

l si

licon

ste

el st

rips

Th

in-g

uage

silic

on s

teel

stri

ps

Very low core loss can be achieved by usingthin-gauge strips due to its small eddy currents.

High

極薄珪素鋼帯

高珪素鋼

Frequency

Low

Perf

orm

ance

Cost HighLow

High

Low

High silicon steel strips

Thin-guagesilicon steel strips

High

極薄珪素鋼帯

高珪素鋼

Frequency

Low

Perf

orm

ance

Cost HighLow

High

Low

High silicon steel strips

Thin-guagesilicon steel strips

◆ Thin-gauge silicon steel strips provide superior cost performance at high frequencies.

1

Thin-gauge silicon steel stripsThin-gauge silicon steel strips

Conventional silicon steels are widely used for electrical power apparatus, electrical components in industrial products and home electronics. However, most silicon steel strips are more than 0.2mm in thickness, and applied only to apparatus operated at industrial frequencies. On the other hand, thin-gauge silicon steel strips have advantage for use at higher frequencies. The thickness of our silicon steel strips have been reduced to the world’s thinnest level so that the core loss caused by eddy currents is compressed to the lowest level and combined with our insulation coating technology, the lamination factor has been improved. Our thin-gauge silicon steel strips assist saving energy and down-sizing high-frequency reactors, transformers, and motors. Our thin-gauge silicon steel strips allow superior cost saving as well as performance at high frequencies.

0.05mm0.08mm 0.1mm 0.025mm

BulkBulk

GT-080 Highsilicon steel

Ferrite(Mn-Zn)

50

100

0

Cor

e lo

ss (

W/k

g)

極薄珪素鋼帯

GTシリーズ

極薄珪素鋼帯

GTシリーズ

GT-050 Amorphous Sendust

Thin-guage silicon steel stripsGT Series

20kHz／0.1T

0.05mm0.08mm 0.1mm 0.025mm

BulkBulk

GT-080 Highsilicon steel

Ferrite(Mn-Zn)

50

100

0

Cor

e lo

ss (

W/k

g)

極薄珪素鋼帯

GTシリーズ

極薄珪素鋼帯

GTシリーズ

GT-050 Amorphous Sendust

Thin-guage silicon steel stripsGT Series

20kHz／0.1T

Inde

x of

cost

per

form

ance

(Cos

t×Lo

ss×

Volu

me)

Highsilicon steel

Amorphous Sendust Ferrite(Mn-Zn)GT-080GT-050Inde

x of

cost

per

form

ance

(Cos

t×Lo

ss×

Volu

me)

Highsilicon steel

Amorphous Sendust Ferrite(Mn-Zn)GT-080GT-050

2

◆ Thin-gauge silicon steel strips demonstrate their true abilities only after application.

◆ Thin-gauge silicon steel strips contribute to down sizing , saving energy and lower costs.

Examples of design of 4kVA reactor ( Ref. page 10 )

Cost performances of thin-guage silicon steel strips

Advantages of applicationsAdvantages of applications

Amorphousand ferriteexhibit excellentperformance ina evaluation ofthe core loss.

Amorphousand ferriteexhibit excellentperformance ina evaluation ofthe core loss.

Have materials been chosen for their characteristics ? Have materials been chosen for their characteristics ?

Evaluation ofperformance willchange accordingto the total lossincluding lossesfrom the sizeand copper wires.

Evaluation ofperformance willchange accordingto the total lossincluding lossesfrom the sizeand copper wires.

Additionally,considering costperformance,the advantagesof thin-gaugesilicon steel stripsis apparent.

Additionally,considering costperformance,the advantagesof thin-gaugesilicon steel stripsis apparent.

GT-050 GT-080

銅線

Images of required sizes to get the same output

Tota

l Los

s (W

)

Highsilicon steel

Amorphous Sendust Ferrite(Mn-Zn)

Copperwire

Coil

CoilCoil Coil

Core Core CoreCore Core

Copperwire Copper

wireCopperwire

Copperwire

Copperwire

GT-050 GT-080

銅線

GT-050 GT-080GT-050 GT-080

銅線

Images of required sizes to get the same output

Tota

l Los

s (W

)

Highsilicon steel

Amorphous Sendust Ferrite(Mn-Zn)

Copperwire

Coil

CoilCoil Coil

Core Core CoreCore Core

Copperwire Copper

wireCopperwire

Copperwire

Copperwire

High-frequency reactors

Motor cores

Applications of the GT series Thin-guage silicon steel strips Applications of the ST series

◆ Oriented thin-guage silicon steel strips GT series

◆ Non-oriented thin-guage silicon steel strip ST series

Table １ Types of thin-gauge silicon steel stripsClassification Grade Thickness Characteristics

GT series GT-100 0.10mm※GT-080 0.08mm　 GT-050 0.05mm※GT-040 0.04mm

ST series ST-150 0.15mm

ST-100 0.10mm

ST-050 0.05mm　Notes) Grade(※）shows newly developed products.

＊Similar oriented magnetic properties relative to the rolling direction＊Very low core loss at high frequencies and high saturation flux density＊Most suitable for reactors, transformers, and shields

＊The same as magnetic properties of GT series＊No orientation in magnetic properties＊Most suitable for motors, shields and also for high frequency reactors

Oriented thin-gauge silicon steel strips

Non-oriented thin-gauge silicon steel strips

Types and applications of thin-gauge silicon steel strips

Crystalline orientation

Mainly applied to wound cores (Wound for use)

3

The crystalline orientations which can be easily magnetized are oriented to the rolling direction.

The crystalline orientation is directed randomly in the plane.

Mainly applied to motor cores (Stamped out for use)

Types of thin-gauge silicon steel strips Types of thin-gauge silicon steel strips

Low core lossThey have low core lossat high frequencies andallow improvements inefficiency, and savesenergy of reactors andtransformers.

High saturation flux densityThey contribute to down-sizing of high frequencyreactors and transformersdue to high saturation fluxdensity.

High permeabilityHigh permeabilityallows use for shields. (Ref. figure on page 6)

Excellent insulation coatingThe inorganic coatingallows excellent insulation,which enables the beststress relief annealing(results).

Thin-guagesilicon steel

strips

Low core lossThey have low core lossat high frequencies andallow improvements inefficiency, and savesenergy of reactors andtransformers.

High saturation flux densityThey contribute to down-sizing of high frequencyreactors and transformersdue to high saturation fluxdensity.

High permeabilityHigh permeabilityallows use for shields. (Ref. figure on page 6)

Excellent insulation coatingThe inorganic coatingallows excellent insulation,which enables the beststress relief annealing(results).

Thin-guagesilicon steel

strips

<Reference > Required properties for magnetic materials<Reference > Required properties for magnetic materials

Core loss

Energy saving and high efficiency are achieved.

Eddy current loss渦電流

The joule heat caused by eddy currents increasesthe energy loss.

◆The lower the core loss, the smaller the energy loss.

H

Ｂ

渦電流Eddy current

Hysteresis loss

Core loss

Energy saving and high efficiency are achieved.

Eddy current loss渦電流渦電流渦電流

The joule heat caused by eddy currents increasesthe energy loss.

◆The lower the core loss, the smaller the energy loss.

H

Ｂ

渦電流渦電流Eddy current

Hysteresis loss

Characteristics of thin-guage silicon steel strips

■ High flux density、High permeability

■ Low core loss

4

CharacteristicsCharacteristics

The thickness significantly effects core loss, therefore, allowing thin with very low core loss at high frequencies to contribute to higher efficiency and saving energy.

Magnetic saturation flux density of oriented thin gauge silicon steel strips

フェライト

アモルファス

ＧＴ－０４０

ＧＴ－０５０

ＧＴ－０８０

ＧＴ－１００

高珪素鋼（ 0.1ｔ）

センダスト

1

Mag

netic

flux

den

sity

　（

T）

Core loss f = 20kHz

0.1

理想の方向

1 10 100 1000

0.1

0.01

0.001

Ｗ2/20k

Ｗ

Ｗ0.5/20k

Ｗ0.1/20k

フェライト

アモルファス

ＧＴ－０４０

ＧＴ－０５０

ＧＴ－０８０

ＧＴ－１００


センダスト

(W/kg)

0.1

Comparison of core loss of oriented thin-guagesilicon steel strips and other Magnetic materials

1 10 100 1000

フェライト

アモルファス

ＧＴ－０４０

ＧＴ－０５０

ＧＴ－０８０

ＧＴ－１００


センダスト

f = 20kHz

0.1 1 10 100 1000

Ferrite

Amorphous

GT-040GT-050

GT-080

GT-100High silicon steel strips(0.1t)

Sendust

0.1 1 10 100 1000

1/20k

The desireddirection

フェライト

アモルファス

ＧＴ－０４０

ＧＴ－０５０

ＧＴ－０８０

ＧＴ－１００


センダスト

1

Mag

netic

flux

den

sity

　（

T）

Core loss f = 20kHz

0.1

理想の方向

1 10 100 1000

0.1

0.01

0.001

Ｗ2/20k

Ｗ

Ｗ0.5/20k

Ｗ0.1/20k

フェライト

アモルファス

ＧＴ－０４０

ＧＴ－０５０

ＧＴ－０８０

ＧＴ－１００


センダスト

(W/kg)

0.1

Comparison of core loss of oriented thin-guagesilicon steel strips and other Magnetic materials

1 10 100 1000

フェライト

アモルファス

ＧＴ－０４０

ＧＴ－０５０

ＧＴ－０８０

ＧＴ－１００


センダスト

f = 20kHz

0.1 1 10 100 1000

Ferrite

Amorphous

GT-040GT-050

GT-080

GT-100High silicon steel strips(0.1t)

Sendust

0.1 1 10 100 1000

1/20k


0 0.050 0.100 0.150 0. 200

10

20

30

40

50

60

0. 250

STシリーズSTSTシリーズシリーズ

GTシリーズGTシリーズ

高珪素鋼板

高珪素鋼板

W1/20K

W 0.5/20K

Thickness (mm)Relation between core loss and thicknessin high-frequency ranges

Thin-guage silico n steel strips Coventional silicon steel strips



0 0.050 0.100 0.150 0. 200

10

20

30

40

50

60

0. 250

ST series

GT series

High siliconsteel strips

W 1/20K

W0.5/20K

Cor

e lo

ss (W

/kg)

ST series

High siliconsteel stripsGT series

0 0.050 0.100 0.150 0. 200

10

20

30

40

50

60

0. 250



高珪素鋼板

高珪素鋼板

W1/20K

W 0.5/20K

Thickness (mm)Relation between core loss and thicknessin high-frequency ranges

Thin-guage silico n steel strips Coventional silicon steel strips



0 0.050 0.100 0.150 0. 200

10

20

30

40

50

60

0. 250

ST series

GT series

High siliconsteel strips

W 1/20K

W0.5/20K

Cor

e lo

ss (W

/kg)

ST series

High siliconsteel stripsGT series

Mag

netic

sat

urat

ion

flux

dens

ity（

T） 0.10mm0.10mm0.05mm0.05mm

フェライト

アモルファスダストコア

極薄化の効果極薄珪素鋼

高珪素鋼

理想の方向

一般珪素鋼

0.35mm0.35mm小型化、省エネを

実現2.0

2.5

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.100.10 mm0.05mm0.05mm

フェライト



高珪素鋼

一般珪素鋼

0.350.23mm

を実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

1.5

f=20kHz B=0.05T

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

1.0

1 10 1000

0.5

0.100.10 mm0.05mm0.05mm

Ferrite

AmorphousDust core

Effect of thinner materialThin-gauge silicon steel

High silicon steel

Conventional silicon steel

0.350.23mm

Core loss (W/kg)

The down-sizing and energy savingsare possible.

Comparison of magnetic properties of oriented thin-guagesilicon steel strips and other magnetic materials


Mag

netic

sat

urat

ion

flux

dens

ity（

T） 0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現2.0

2.5

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.100.10 mm0.05mm0.05mm

フェライト



高珪素鋼

一般珪素鋼

0.350.23mm

を実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

1.5

f=20kHz B=0.05T

0.10mm0.10mm0.05mm0.05mm

フェライト



高珪素鋼

理想の方向

一般珪素鋼


実現

1.0

1 10 1000

0.5

0.100.10 mm0.05mm0.05mm

Ferrite

AmorphousDust core

Effect of thinner materialThin-gauge silicon steel

High silicon steel

Conventional silicon steel

0.350.23mm

Core loss (W/kg)

The down-sizing and energy savingsare possible.

Comparison of magnetic properties of oriented thin-guagesilicon steel strips and other magnetic materials


Thin-gauge silicon steel strips have high saturation flux density which contributes to the downsizing.

Core loss of thin gauge silicon steel strips at high frequencies

5

Seeing the effect of the thickness

Properties of thin-gauge silicon steel stripsProperties of thin-gauge silicon steel strips

The most suitable thin-gauge silicon steel strips can be selected according to the required magnetic properties.

Mag

netic

flux

den

sity

　B

25（

T）

f=10kHz B=0.1TCore loss (W/kg)

Comparison of core loss of non-oriented thin-gauge siliconsteel strips with other non-oriented silicon steel strips

ＳＴ－１００

ＳＴ－０５０

高珪素鋼

0

理想の方向

60 80 100

1.5

理想の方向

20 40

1.6

1.7

ＳＴ－１５０

珪素鋼 0.50mm

珪素鋼 0.35mm

珪素鋼 0.20mm

極薄珪素鋼

ＳＴ－１００

ＳＴ－０５０

高珪素鋼

理想の方向理想の方向

ＳＴ－１５０

珪素鋼 0.50mm

珪素鋼 0.35mm

珪素鋼 0.20mm

極薄珪素鋼

ＳＴ－１００

ＳＴ－０５０

高珪素鋼


ＳＴ－１５０

珪素鋼 0.50mm

珪素鋼 0.35mm

珪素鋼 0.20mm

極薄珪素鋼

ST-100

ST-050High silicon steel

1.4

1.3

ST-150

0.50 mm

0.35 mm0.20mm

Thin-gauge silicon steels

Silicon steel

The

desired

directionM

agne

tic fl

ux d

ensi

ty　

B25

（T）

f=10kHz B=0.1TCore loss (W/kg) f=10kHz B=0.1TCore loss (W/kg)

Comparison of core loss of non-oriented thin-gauge siliconsteel strips with other non-oriented silicon steel strips

ＳＴ－１００

ＳＴ－０５０

高珪素鋼

0

理想の方向

60 80 100

1.5

理想の方向

20 40

1.6

1.7

ＳＴ－１５０

珪素鋼 0.50mm

珪素鋼 0.35mm

珪素鋼 0.20mm

極薄珪素鋼

ＳＴ－１００

ＳＴ－０５０

高珪素鋼


ＳＴ－１５０

珪素鋼 0.50mm

珪素鋼 0.35mm

珪素鋼 0.20mm

極薄珪素鋼

ＳＴ－１００

ＳＴ－０５０

高珪素鋼


ＳＴ－１５０

珪素鋼 0.50mm

珪素鋼 0.35mm

珪素鋼 0.20mm

極薄珪素鋼

ST-100

ST-050High silicon steel

1.4

1.3

ST-150

0.50 mm

0.35 mm0.20mm

Thin-gauge silicon steels

Silicon steel

The

desired

direction

0 1 2 3 4 5 6 7

t=0.10mm

t=0.10mm

t=0.10mm

ST100

ST050

GT100

GT050

GT100

GT050 ST100ST050

ST100

GT100

Cor

e lo

ssM

axim

um

perm

eabi

lity

DC

m

agne

tost

rict

ion

cons

tant

Si content (%)Magnetic properties of silicon steels

0

t=0.10mm

t=0.10mm

t=0.10mm

ST100

ST050

GT100

GT050

GT100

GT050 ST100ST050

ST100

GT100

Thin -gauge silicon steel High silicon steel

0 1 2 3 4 5 6 7

t=0.10mm

t=0.10mm

t=0.10mm

ST100

ST050

GT100

GT050

GT100

GT050 ST100ST050

ST100

GT100

Max

imum

pe

rmea

bilit

yD

C

mag

neto

stri

ctio

n co

nsta

nt

Si content (%)

0

t=0.10mm

t=0.10mm

t=0.10mm

ST100

ST050

GT100

GT050

GT100

GT050 ST100ST050

ST100

GT100

Thin -

80 1 2 3 4 5 6 7

t=0.10mm

t=0.10mm

t=0.10mm

ST100

ST050

GT100

GT050

GT100

GT050 ST100ST050

ST100

GT100

Cor

e lo

ssM

axim

um

perm

eabi

lity

DC

m

agne

tost

rict

ion

cons

tant

Si content (%)Magnetic properties of silicon steels

0

t=0.10mm

t=0.10mm

t=0.10mm

ST100

ST050

GT100

GT050

GT100

GT050 ST100ST050

ST100

GT100

Thin -gauge silicon steel High silicon steel

0 1 2 3 4 5 6 7

t=0.10mm

t=0.10mm

t=0.10mm

ST100

ST050

GT100

GT050

GT100

GT050 ST100ST050

ST100

GT100

Max

imum

pe

rmea

bilit

yD

C

mag

neto

stri

ctio

n co

nsta

nt

Si content (%)

0

t=0.10mm

t=0.10mm

t=0.10mm

ST100

ST050

GT100

GT050

GT100

GT050 ST100ST050

ST100

GT100

Thin -

8

6

Magnetic flux density of non-oriened thin-guage silicon steel strips

Comparison of magnetic properties of silicon steel

Non-oriented thin-gauge silicon steel strips is the ideal material due to its low core loss and high saturation flux density.

Properties of Thin-gauge silicon steel stripsProperties of thin-gauge silicon steel stripsProperties of Thin-gauge silicon steel stripsProperties of thin-gauge silicon steel strips

We sell thin-gauge silicon steel strips as well as designing, manufacturing, and sales of wound cores and applied products in which thin-gauge silicon steel strips are used. Based on our wealth of technical experience, we can design and manufacture the products to meet your demands. We offer wound cores in small lots which exhibit excellent cost performances. Using our wound cores is less costly than stamped cores since die assembly is unnecessary. We assist customers in selecting suitable cores by using our wealth of technical experience.

The design of applied products

Examples of application

Wound cores

We manufacture various wound cores and reactors.

Applied products (Electronic parts)

7

The design and manufacturing of applied productsThe design and manufacturing of applied products

12．防錆処理12．防錆処理

６．歪み取り焼鈍６．歪み取り焼鈍

９．切断９．切断

７．樹脂真空含浸７．樹脂真空含浸

10．研磨、エッチング10．研磨、エッチング

11．鉄心特性試験11．鉄心特性試験

８．加熱硬化８．加熱硬化

1.圧延（日本金属）1.圧延（日本金属）

２．焼鈍＋絶縁皮膜コーティング２．焼鈍＋絶縁皮膜コーティング

３．３．

４．スリット加工４．スリット加工

５．コア成形５．コア成形





10．研磨、エッチング10．カット面処理





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12．防錆処理12.防錆処理




10．研磨、エッチング10 .カット面処理

11．鉄心特性試験11.鉄心特性試験




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12．防錆処理12. Rust proofing

６．歪み取り焼鈍6. Annealing

９．切断9. Cutting

７．樹脂真空含浸7. Vacuum impregnation

10．研磨、エッチング10. Cut surface polishing / processing

．鉄心特性試験11. Test of core properties

８．加熱硬化8. Heat curing

1.圧延（日本金属）1. Rolling (Nippon Kinzoku)

２．2. Annealing & insulation coating

３．3. Magnetic property test (Epstein test)

４．スリット加工4. Slitting

5. Core making










３．３．












３．３．












３．３．



12．防錆処理12.防錆処理




10．研磨、エッチング10 .カット面処理

11．鉄心特性試験11.鉄心特性試験




３．３.












３．３．












３．３．












３．３．



12．防錆処理12. Rust proofing

６．歪み取り焼鈍6. Annealing

９．切断9. Cutting

７．樹脂真空含浸7. Vacuum impregnation

10．研磨、エッチング10. Cut surface polishing / processing

．鉄心特性試験11. Test of core properties

８．加熱硬化8. Heat curing

1.圧延（日本金属）1. Rolling (Nippon Kinzoku)

２．2. Annealing & insulation coating

３．3. Magnetic property test (Epstein test)

４．スリット加工4. Slitting

5. Core making

Manufacturing process of applied products

From rolling to assembly, we manufacture thin-gauge silicon steel strips and applied products under strict quality control.

8

Production processProduction process

Table 2 Dimensional notations

Shape Notations SN SN a×b×c×d (×e×f-R) EN EN a×b×c×d (×e×f-R) TN TN a×d×Di (×Do) SC SC a×b×c×d (×e×f-R) EC EC a×b×c×d (×e×f-R) TC TC a×d×Di (×Do)

ECP a1 d1

ECP a2×b×c×d2(×e×f-R) a3 d3

SCP SCP a1×b×c×d1(×e×f-R) a2 d2

Wound cores are available to meet customers requirements. Please specify the following.

Standard cores : CS series, SC series, EC series

9

Standard coresStandard cores

Saturationproperty Core size

selection

Inductance

Rated current

Carrier frequency

Carrier current

Selection of thelarger core size

①

②

Rea

ctor

spe

cific

atio

n

Core lossproperty Core size

selection

Saturationproperty Core size

selection

Inductance

Rated current

Carrier frequency

Carrier current

Selection of thelarger core size

①

②

Rea

ctor

spe

cific

atio

n

Core lossproperty Core size

selection

Table 3 Comparison of designs of reactors between various magnetic materials Materials Parameters

GT-100

GT-080

GT-050

GT-040

High silicon steel 0.1t

Amor- phous

Sendust

Ferrite Mn-Zn

Inductance(µＨ) 1000 ← ← ← ← ← ← ← Rated current (Ａ) 25 ← ← ← ← ← ← ← Frequency(kＨz) 20 ← ← ← ← ← ← ← Carrier current(Ap-p) 5 ← ← ← ← ← ← ← Inductance(µＨ)at50A ≧600 ← ← ← ← ← ← ← E

lect

rica

l sp

ecifi

catio

n

Temperature rise(K) ≦70 ← ← ← ← ← ← ← B(T) 0.90 1.03 1.06 1.06 0.87 0.91 0.39 0.46 Core loss(W) 19.1 14.4 11.5 9.2 14.8 3.2 5.7 1.1 Mass(kg) 1.27 1.11 0.96 0.92 1.23 1.27 2.27 1.10 C

ore

Ratio of cost *1 1.00 0.92 0.97 0.97 1.03 1.16 1.19 1.20 DC resistance(ｍΩ) 20.1 18.9 20.3 20.7 20.1 19.4 31.5 38.4 Copper loss(Ｗ) 12.6 11.8 12.7 13.0 12.6 12.2 19.7 24.2 Mass(kg) 0.60 0.57 0.61 0.62 0.60 0.58 1.13 1.63 C

oil

Ratio of cost *1 1.00 0.95 1.02 1.03 1.00 0.97 1.88 2.72 Total mass(kg) 1.87 1.68 1.57 1.54 1.83 1.85 3.40 2.73 Ratio of Loss(%) *2 0.79 0.66 0.61 0.56 0.69 0.39 0.64 0.63 ①Ratio of volume *1 1.00 0.92 0.87 0.83 1.00 1.09 2.00 1.99 ②Ratio of loss *1 1.00 0.83 0.77 0.70 0.86 0.49 0.80 0.80 ③Ratio of cost *1 1.00 0.93 0.98 0.98 1.02 1.11 1.36 1.57 R

eact

or

④Index of cost performance *3 1.00 0.71 0.65 0.57 0.88 0.59 2.18 2.49

*1 Values are calculated on the condition that values of GT-100.are set at 1.00. *2 Ratio of loss is the ratio of total loss (core loss plus copper loss) to capacity (4kVA). *3 Index of cost performance is calculated as ①×②×③.(The smaller number, better cost performance)

Design examples

The following is the example of a reactor for 4kVA photovoltaics generation. We can design the optimal reactor, by the specifications of inductance, rated current, carrier frequency, carrier current, etc.

10

Design examplesDesign examples

Δ B

②鉄損（＝マイナーループの面積）

Saturation propertyof Reactor

Δ B

② Core loss(=Area of minar loop)

B

①

Current

Indu

ctan

ce

Magneticflux density

Magnetic force

Δ B

②鉄損（＝マイナーループの面積）

Saturation propertyof Reactor

Δ B

② Core loss(=Area of minar loop)

B

①

Current

Indu

ctan

ce

Current

Indu

ctan

ce

Magneticflux density

Magnetic force

Table 4 Dimension Thickness Width

Grade Dimension (mm)

Tolerance (mm)

Cross-directional thickness deviation

(mm) Dimension

(mm) Tolerance

(mm)

Coil inner diameter

(mm)

GT-100 0.10 +0.010 -0.015 0.010 MAX 300 ±0.4 250

GT-050 0.05 +0.008 -0.010 0.010 MAX 300 ±0.4 250

ST-150 0.15 ±0.020 0.020 MAX 300 ±0.4 250

ST-100 0.10 +0.010 -0.015 0.010 MAX 300 ±0.4 250

ST-050 0.05 +0.008 -0.010 0.010 MAX 300 ±0.4 250

Table 5 Standard values of thin-guage silicon steel strips Core loss(W/kg) Magnetic flux density(T) Grade W10/400 W15/400 W10/1000 B8 B50

GT-100 － ≦15 － ≧1.7 － GT-050 －－ ≦24 ≧1.6 － ST-150 ≦14 －－－ ≧1.6 ST-100 ≦13 －－－ ≧1.6 ST-050 －－－－ ≧1.5

Notes) 1. For GT series, the specimens are taken from the strips parallel to the rolling direction. The measurements are in accordance with JIS C 2550 after stress relief annealing.

2. For ST series, the specimens are taken from the strips in both directions of parallel and transverse to the rolling direction. The measurements are in accordance with JIS C 2550.

3. W10/400,W15/400 and W10/1000 show core losses at magnetic flux densities 1.0T(10kG),1.5T(15kG) and 1.0T(10kG), and frequencies 400Hz, 400Hz and 1000Hz, respectively.

4. B8 and B50 show magnetic flux densities at magnetic force 800A/m and 5000A/m.

11

SpecificationsSpecifications

Dimension of thin-guage silicon steel strips

Standard values of thin-guage silicon steel strips

Table 6 Core loss properties Core loss (W/kg) Grade W15/50 W15/100 W10/400 W10/1000 W5/2000 W2/5000 W1/10000 W0.5/20000

GT-100 1.2 3.0 6.1 21.3 18.0 15.2 10.4 13.0 GT-050 1.7 5.0 7.3 17.0 13.0 10.2 7.1 5.3 ST-150 2.3 － 11.6 39.4 30.0 21.5 17.2 14.2 ST-100 2.7 － 11.0 34.1 25.3 17.0 12.9 10.2 ST-050 6.1 － 25.4 65.8 40.8 21.4 11.6 6.7

Table 7 Permeability and magnetic flux density properties Alternating permeability×10-3(H/m) Magnetic flux density(T) Grade

μ10/400 μ10/1000 μ5/2000 μ1/10000 μ0.5/20000 B8 B25 B50 GT-100 20.4 16.2 9.6 2.8 1.2 1.82 －－ GT-050 16.6 16.0 9.9 2.7 1.5 1.75 －－ ST-150 9.61 8.17 5.57 1.70 1.15 － 1.56 1.66 ST-100 8.54 7.87 5.81 2.00 1.39 － 1.55 1.65 ST-050 3.13 3.11 2.65 1.00 0.93 － 1.47 1.58

Notes) 1. For GT series, the specimens are taken from the strips parallel to the rolling direction. The measurements are in accordance with JIS C 2550 after stress relief annealing.

2. For ST series, the specimens are taken from the strips in both directions of parallel and transverse to the rolling direction. The measurements are in accordance with JIS C 2550.

Table 8 Mechanical and electric properties

Grade Density (g/cm3)

Space factor (%)

Tensile strength (N/mm2)

Elongation (%)

Hardness (Hv)

Specific resistance (μΩcm)

GT-100 7.65 93 420 9 202 *2 48 GT-050 7.65 90 387 11 179 *3 48 ST-150 7.65 94 496 15 205 *1 52 ST-100 7.65 93 476 13 198 *2 52 ST-050 7.65 90 487 12 182 *3 52 Notes) 1.Tensile strength and elongation are measured parallel to the rolling direction.

2. Hardness are measured by *1: H; 0.5kg, *2: H; 0.3kg, *3: H; 0.1kg.

Table 9 Comparison of properties between various magnetic materials

Material Magnetic flux density B8(T)

DC max relative permeability µm

Core loss W1/20000 (W/kg)

Specific resistance (µΩm)

GT-100 1.82 24,000 35 0.48 GT-080 ※ 1.80 20,000 31 0.48

GT-050 1.75 14,000 21 0.48 GT-040 ※ 1.70 10,000 18 0.48

ST-150 1.44 10,000 55 0.52 ST-100 1.42 7,000 44 0.52 ST-050 1.26 2,500 26 0.52

High silicon steel(0.1t) 1.29 23,000 31 0.82 Amorphous 1.56 300,000 6 1.30

Nanocrystalline soft magnetic alloys 1.23 70,000 4 0.01

Dust core(Sendust) 0.65 150 62 >10000 Ferrite (Mn-Zn) 0.45 3,500 3 >100000 Notes) Grade(※)shows newly developed products.

Magnetic propertiesMagnetic propertiesMagnetic properties of thin-guage silicon steel strips

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Fig.1A Core loss cuves of GT-100

50Hz

400Hz

1kHz

2kHz

5kHz

10kHz

20kHz

0.01

0.1

1

10

0.01 0.1 1 10 100 1000

Core loss （W/kg)

Mag

neti

c flu

x de

nsit

y (T

)

Fig.1B Exciting power curves of GT-100

50Hz

400Hz

1kHz

2kHz

5kHz

10kHz

20kHz

0.01

0.1

1

10

0.01 0.1 1 10 100 1000

Exciting effective VA （VA/kg)

Mag

neti

c flu

x de

nsit

y (T

)

Fig.1C Frequency permeability characteristics curves of GT-100

B=0.01T

B=0.04T

B=0.1T

B=0.2T

B=0.5T

B=1.0T

0.001

0.01

0.1

10 100 1000 10000 100000

Frequency (Hz)

AC p

erm

eabi

lity

(H/m

)

Oriented thin-guage silicon steel strips GT-100

13

Characteristic curves (GT series)Characteristic curves (GT series)

Fig.2A Core loss cuves of GT-050

50Hz

400Hz

1kHz

2kHz

5kHz

10kHz

20kHz

0.01

0.1

1

10

0.01 0.1 1 10 100 1000Core loss （W/kg)

Mag

neti

c flu

x de

nsit

y (T

)

Fig.2B Exciting power curves of GT-050

50Hz

400Hz

1kHz

2kHz

5kHz

10kHz

20kHz

0.01

0.1

1

10

0.01 0.1 1 10 100 1000

Exciting effective VA （VA/kg)

Mag

neti

c flu

x de

nsit

y (T

)

Fig.2C Frequency permeability characteristics curves of GT-050

B=0.01TB=0.04T

B=0.1T

B=0.2T

B=0.5T

B=1.0T

0.001

0.01

0.1

10 100 1000 10000 100000

Frequency (Hz)

AC p

erm

eabi

lity

(H/m

)

Oriented thin-guage silicon steel strips GT-050

14

Characteristic curves (GT series)Characteristic curves (GT series)

Fig. 3A Core loss curves of ST-150

50Hz

400H

z

1kHz

2kHz

5kHz

10kH

z

20kH

z

0.01

0.1

1

10

0.01 0.1 1 10 100 1000

Core loss （W/kg)

Mag

neti

c flu

x de

nsit

y (T

)

Fig.3B Exiting power curves of ST-150

50Hz

400Hz

1kHz

2kHz

5kHz

10kHz

20kHz

0.01

0.1

1

10

0.01 0.1 1 10 100 1000

Exiting power（VA/kg)

Mag

neti

c flu

x de

nsit

y (T

)

Fig.3C Frequency permeability characteristics curves of ST-150

B=0.01TB=0.04T

B=0.1TB=0.2TB=0.5TB=1.0T

0.0001

0.001

0.01

0.1

10 100 1000 10000 100000

Frequency (Hz)

AC

per

mea

bilit

y (H

/m)

Non-oriented thin-guage silicon steel strips ST-150

15

Characteristic curves (ST series)Characteristic curves (ST series)


50Hz

400Hz

1kHz

2kHz

5kHz

10kHz

20kHz

0.01

0.1

1

10

0.01 0.1 1 10 100 1000

Core loss （W/kg)

Mag

neti

c flu

x de

nsit

y (T

)


50Hz

400Hz

1kHz

2kHz

5kHz

10kHz

20kHz

0.01

0.1

1

10

0.01 0.1 1 10 100 1000


Mag

neti

c flu

x de

nsit

y (T

)


B=0.01T

B=0.04T

B=0.1TB=0.2TB=0.5TB=1.0T

0.0001

0.001

0.01

0.1

10 100 1000 10000 100000

Frequency (Hz)

AC

per

mea

bilit

y (H

/m)

16




50Hz

400Hz

1kHz

2kHz

5kHz

10kHz

20kHz

0.01

0.1

1

10

0.01 0.1 1 10 100 1000


Mag

neti

c flu

x de

nsit

y (T

)


50Hz

400Hz

1kHz

2kHz

5kHz

10kHz

20kHz

0.01

0.1

1

10

0.01 0.1 1 10 100 1000

Core loss （W/kg)

Mag

neti

c flu

x de

nsit

y (T

)


B=0.01TB=0.04TB=0.1TB=0.2TB=0.5TB=1.0T

0.0001

0.001

0.01

0.1

10 100 1000 10000 100000

Frequency (Hz)

AC p

erm

eabi

lity

(H/m

)

17



The insulation coating has the following characteristics.

1. The inorganic insulation coating is stable both thermally and chemically. Stress relief annealing is carried out in non oxidizing atmosphere at a temperature from 730 to 770℃, but the insulation coating has thermal resistance up to about 800℃. The coating is not damaged by transformer oil, and has high corrosion resistance.

2. The insulation coating is firmly adhered to the strip, so that it will not peel off during shearing and blanking.

3. The thin insulation coating allows high lamination factor. 4. The coating has high interlaminar resistance.

Stress from cutting, punching, bending have adverse effects on magnetic properties. To relieve these stress, stress relief annealing should be performed if necessary. The cautionary statements about stress relief annealing are as follows.

1. The atmosphere of stress relief annealing

Compositions of atmosphere gas are needed to be highly pure Nitrogen or mixed gas of 5-10% Hydrogen and 90-95% Nitrogen with the dew point less than 0℃.

2. Avoiding Carbon contamination The thin-gauge silicon steel strips can be easily carburized by annealing, because they are low carbon steel. The spacer and the inner cover of batch-type furnace should be made from low carbon steel. Completely remove oil, paper and cloth.

3. Piling Stacked cores should be heated in the edge to edge direction for a more efficient heat transfer for uniform heating. The heat radiation and the heat transfer by convection of atmosphere should be considered. Unlevel surfaces of the bases reduce the performance of the cores because of the induced strains.

4. Annealing temperature and time Annealing temperature of 730～770℃, for 2～3 hours is recommended. Cooling at the rate of 50～100℃/hr, the temperature of the furnace below 350℃

when cores are removed will have the best results.

Our thin-guage silicon steel strips are compatible in the RoHS directive that the mercury and its compounds, the cadmium and its compounds, the lead and its compounds, hexavalent chromium compounds, PBB and PBDE are below the restricted value and do not intentionally add or use in the manufacturing process.

Stress relief annealing of wound cores

Substances of environmental concern

The insulation coating

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MiscellaneousMiscellaneous

1308-1, Ohaza-Angyoryo-Negishi, Kawaguchi-shi, Saitama-ken, 333-0834 TEL : +81-48-283-1002, FAX : +81-48-283-1004 E-mail : [email protected] Notice (1) Excluding standard values, the technical data described in this catalogue does not guarantees values. (2) Products described in this catalogue may show properties different from described contents depending on the intended purposes and conditions of use. We will not be responsible for any damages. (3) Technical data in this catalogue is subject to change without previous announcements.

Please contact our sales department for the latest information.

July 2008

NIKKIN DENJI KOGYO CO.,LTD.

Thin-gauge silicon steel strips and Applied products silicon steel strips provide superior cost...

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Transcript of Thin-gauge silicon steel strips and Applied products silicon steel strips provide superior cost...