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FERROXCUBE
DATA SHEET
3R1 Material specification
Supersedes data of September 2004 2008 Sep 01
Ferroxcube
Material specification
3R1 SPECIFICATIONS MnZn ferrite with a nearly rectangular hysteresis loop for use in magnetic regulators/amplifiers. SYMBOL i B CONDITIONS 25 C; 10 kHz; 0.25 mT 25 C; 10 kHz; 1200 A/m 100 C; 10 kHz; 1200 A/m from 1 kA/m; 25 C from 1 kA/m; 100 C from 1 kA/m; 25 C from 1 kA/m; 100 C DC; 25 C VALUE 800 20% 410 340 310 220 52 23 103 230 4700 m C kg/m3 A/m
10 10 1 1 10 f (MHz)
3R1
10 4 handbook, halfpage 's , '' s 10 3 ' s
MBW061
3R1
UNIT
mT
'' s
Br
mT
10 2
Hc
10 2
TC density
Fig.1
Complex permeability as a function of frequency.
handbook, halfpage
5000 i 4000
MBW062
3R1
handbook, halfpage
500
MBW018
B (mT) 400
25oC 100oC
3R1
3000
300
2000
200
1000
100
0 50
0 50 150 T ( o C) 250
50 0 50 100 500 H (A/m) 1000
Fig.2
Initial permeability as a function of temperature.
Fig.3 Typical B-H loops.
2008 Sep 01
200
Ferroxcube
Material specification
3R1
10 4 handbook, halfpage Pv (kW/m 3)
MBW001
1 MHz 400 kHz
3R1
handbook, halfpage
800
MBW002
3R1 f B (kHz) (mT)
Pv (kW/m 3 ) 600
100 kHz
10 3 100
25 kHz
100 200
400
10 kHz
30
10 2 200 10 10 1 10 10 2 B (mT) 10
3
200
0 0 40 80 120 T (o C)
Fig.5 Fig.4 Specific power loss as a function of peak flux density with frequency as a parameter.
Specific power loss for several frequency/flux density combinations as a function of temperature.
Remark: When 3R1 ring cores are driven exactly at their natural mechanical resonant frequencies a magneto-elastic resonance will occur. With large flux excursions and no mechanical damping, amplitudes can become so high that the maximum tensile stress of the ferrite is exceeded. Cracks or even breakage of the ring core could be the result. It is advised not to drive the toroidal cores at their radial resonant frequencies or even subharmonics (e.g. half this resonant frequency). Resonant frequencies can be calculated for any ring core with the following simple formula: 5700 fr = --------------------------- kHz Do + D ------------------i 2 where: f = radial resonant frequency (kHz) Do = outside diameter (mm) Di = inside diameter (mm).
2008 Sep 01
201
Ferroxcube
Material specification
DATA SHEET STATUS DEFINITIONS DATA SHEET STATUS Preliminary specification Product specification PRODUCT STATUS Development DEFINITIONS
3R1
This data sheet contains preliminary data. Ferroxcube reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. This data sheet contains final specifications. Ferroxcube reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.
Production
DISCLAIMER Life support applications These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Ferroxcube customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Ferroxcube for any damages resulting from such application. PRODUCT STATUS DEFINITIONS STATUS Prototype Design-in Preferred Support INDICATION DEFINITION These are products that have been made as development samples for the purposes of technical evaluation only. The data for these types is provisional and is subject to change. These products are recommended for new designs. These products are recommended for use in current designs and are available via our sales channels. These products are not recommended for new designs and may not be available through all of our sales channels. Customers are advised to check for availability.
2008 Sep 01
202

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