VAC微晶材料共模 波磁芯(EMI_CMC)1

共模电感

EMC-产品:微晶材料(VITROPERM)共模滤波磁芯及电感

EMC-PRODUCTS: Cores and Common Mode Chokes with VITROPERM

共模电感

生产工艺Production process带材生产Production of ribbon:快速冷却Rapid quenching (106 K/s, 25 m/s)非晶带材Amorphous ribbon (ca. 25 m)

磁芯生产Production of core:非晶带材Amorphous ribbon→环形带绕磁芯Toroidal strip wound core材料特性Material properties:→热处理工艺Field annealing process

Toroidal strip wound cores: epoxy coating orplastic

casing

ribbon layers, 25m thickJ. Beichler, VAC's EMC Products EMC2006_extern_large.ppt February 16th, 2006 page 2

共模电感

微晶材料共模滤波磁芯的材料特性Materials for Common Mode Chokes (CMC's)Nanocrystalline MaterialMaterial base Coercivity Hc[A/m]≈ 70% Fe<3

(VITROPERM )MnZn 5....60 (....2000)

Ferrite

Losses PFe,ty p.[W/kg] 100 kHz, 300mT, 100°CSaturation flux density

80

140

> 1.2 Bs[T]

< 0.48

Initial permeability iSaturation magnetostrictionλsMax. operating temp. Top

4000....200 000>10000: 10 ...10<10000:< 810-6 -8 -6

10....10 000 (20 000)10 ....2×10< 120°CFebruary 16th, 2006 page 3

-6

-5

120...140°C and higherJ. Beichler, VAC's EMC Products EMC2006_extern_large.ppt

共模电感

微晶材料VITROPERM:整个频段范围都有高的磁导率 VITROPERM: high over whole frequency rangeZ=ω L= 2π f 0 r AFe N2/ lFe1000000 Co - Amorphous

Nanocrystalline (VITROPERM)

100000 NiFe (70um) 10000 Mn-Zn Ferrite (Siferrit T38) 1000 0,1 1 10 100 1000 10000

Frequency, f[kHz]J. Beichler, VAC's EMC Products EMC2006_extern_large.ppt February 16th, 2006 page 4

共模电感

微晶材料VITROPERM:整个频段范围都有高的插入损耗 VITROPERM: high insertion loss over whole frequency range40Ferrit Amotech/Yuyu

insertion loss aE[dB] (50 Ohm-System)

30

VAC W523

20

10

LSE CMC, 1ph Different CMC's: ferrite core, Amotech/Yuyu, VAC W523 1 10 100 1000 10000 100000

0Status: Test sample Quantity: 3 Filename: LSE_01.xls 15.06.2004, H. Wink/ J. Beichler (KB-E BE)

frequency[kHz]HP 4194A (1....40000 kHz), Ueff= 500 mV

J. Beichler, VAC's EMC Products

EMC2006_extern_large.ppt

February 16th, 2006

page 5

共模电感

影响插入损耗的因素insertion loss affected factors60

50

insertion loss aE[dB] 50 Ohm system

40

30

VP20

ferrite L

10

CWNoise source Lleakage harmonics standards (150 kHz - 30 MHz)

0 0.001

0.01

0.1

1

10

100

frequency[MHz]J. Beichler, VAC's EMC Products EMC2006_extern_large.ppt February 16th, 2006 page 6

共模电感

微晶共模磁芯的优点Benefits of nanocrystalline CMC's 1.高的初始磁导率High initial permeability ii

相同体积的情况下,用少的绕线圈数就可获得高的电感,使其在低频范围有更高的共模衰减Much higher attenuation in LF-range at small no. of turns Much higher attenuation in LF-range at small no. of turns(N) and same volume or (N) and same volume or

圈数更少或磁芯体积更小的情况下,在低频范围可获得

基本相同的共模衰减Similar attenuation in LF-range at smaller no. of turns (N) and/or Similar attenuation in LF-range at smaller no. of turns (N) and/orsmaller size. smaller size.而且:少的圈数 N→更少的分布电容 CW=高频范围(HF-range)有更好的性能而且:少的圈数 N更少的分布电容 CW=高频范围(HF-range)有更好的性能

AND: Small N→ smaller CW= much better performance in HF-range W

J. Beichler, VAC's EMC Products

EMC2006_extern_large.ppt

February 16th, 2006

page 7

共模电感

微晶电感:相同的体积更高共模衰减VITROPERM: higher attenuation in same volume60

ferrite25x15x10 mm, N= 26

VITROPERM25x16x10 mm, N=26

50

insertion loss aE[dB] 50 Ohm system

40

30

20

10

0 0.001

0.01

0.1

1

10

100

frequency[MHz]J. Beichler, VAC's EMC Products EMC2006_extern_large.ppt February 16th, 2006 page 8

共模电感

微晶电感:近似的衰减更小的体积(3~4倍)VITROPERM: Similar attenuation in smaller volume (factor 3…4) (at medium frequencies; higher attenuation at low and high frequencies)60

ferrite25x15x10 mm, N= 26

VITROPERM16x10x6 mm, N=18

50

insertion loss aE[dB] 50 Ohm system

40

30

20

10

0 0.001

0.01

0.1

1

10

100

frequency[MHz]J. Beichler, VAC's EMC Products EMC2006_extern_large.ppt February 16th, 2006 page 9

共模电感

微晶共模磁芯的优点Benefits of nanocrystalline CMC's→ core saturation at higher field strength (for same )

2.高的饱和磁通密度High saturation induction Bs

好的抗饱和能力Good to take high unbalance currents and/or更小的体积Smaller size

FilterL1Cx1 Cy Cx2

Long cable

L1Ccable

Load current (AC)

Leakage current

J. Beichler, VAC's EMC Products

EMC2006_extern_large.ppt

Load

Cy

February 16th, 2006

page 10

共模电感

微晶共模磁芯的优点Benefits of nanocrystalline CMC's 3.高的工作温度,优异的温度特性High operational temperatures,excellent thermal properties

更小的体积,易于设计Smaller size, easy design磁特性基本不受温度的影响nearly temperature independentproperties (Z, L,Q, aE, ...)提高了产品的可靠性improved product reliability

J. Beichler, VAC's EMC Products

EMC2006_extern_large.ppt

February 16th, 2006

page 11

共模电感

微晶材料:磁特性不受温度的影响VITROPERM: temperature independent properties40

CMC (10A) CMC (10A) CMC (10A)T=-40癈T=+20癈 T=-40癈→ 120癈→ 120癈insertion loss aE[dB] 50 Ohm system30

20

VP CMC+120癈+120癈+100癈+100癈

typical ferrite CMC typical ferrite CMC typical ferrite CMC

10

+20癈+20癈 -40癈 -40癈0 1 10 100 1000

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