3R1

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 µi 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 ≈ 4 700 Ωm °C kg/m3 A/m 10 10 1 1 10 f (MHz) 3R1 10 4 handbook, halfpage µ's , µ'' s 10 3 µs ' MBW061 3R1 UNIT mT µ'' s Br mT 10 2 Hc 10 2 ρ TC density Fig.1 Complex permeability as a function of frequency. handbook, halfpage 5000 µi 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 π  ------------------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