 Strip
Wound Cores
MAGNETICS® pioneered strip wound cores. Our strip wound cores are manufactured from
several different materials, each with differing magnetic and size
properties. Please download the technical literature below for
a full review of an individual core's or material's characteristics.
MAGNETICS tape wound cores are made from
high permeability magnetic strip alloys of nickel-iron (85% or 50% nickel
in thicknesses from 0.0005" to 0.004"), silicon-iron (in 0.002", 0.004"
and 0.12" thicknesses), and various
amorphous metals (0.001" thickness). Available in nylon boxes, tape
wound cores are produced as small as 0.375" ID to more than 20" OD, in
over 1400 sizes. MAGNETICS
tape wound cores are often key components of complicated electronic
circuitry found in highly reliable airborne and space computers, telephone
systems, radar installations, jet engine controls, power supplies and
nuclear reactors. For more information on tape wound cores, please
download the
MAGNETICS
Strip Wound Cores Catalog (PDF
690 KB).
MAGNETICS bobbin cores are miniature tape cores made
from ultra-thin (0.000125" to 0.001" thick) strip wound on
non-magnetic stainless steel bobbins. Bobbin cores are generally
manufactured from Permalloy 80, Orthonol®, Supermalloy and amorphous
alloys. Covered with protective caps
and then epoxy coated, bobbin cores can be made as small as 0.05" ID
and with strip widths down to 0.032". Bobbin cores can switch
from positive to negative saturation in a few microseconds or less, making
them ideal for logic elements, serial/parallel data conversion, and
generation of pulse patterns. Because of their temperature
stability, low coercive values and high saturation densities, bobbin cores
are superior to other types of cores for high frequency magnetic
amplifiers, harmonic generators, pulse transformers and other
applications. For more information about bobbin cores, please
download the
MAGNETICS
Strip Wound Cores Catalog (PDF 690
KB).
| Special Advantages of MAGNETICS
Strip Wound Cores |
- Tape wound cores tested with both IEEE #393 and Sine Current
E-I Loop tests
- Cores matched with E-I loop comparison or Current Flux Reset
parameters
- Strict quality control includes DC Fluximeter testing and
Supermalloy impedance permeability testing
|
- Protective cap assures integrity of finished assembly of
bobbin cores
- Stainless steel bobbins reduce leakage flux and afford
greater uniformity in production quantities
- Extensive testing and quality control procedures
|
|
NOTE: Materials are different than for ferrite cores, even if the code letter is the same.
For information on each material, please download the complete
MAGNETICS
Strip Wound Cores Catalog (PDF
690 KB).
MAGNESIL |
SQUARE ORTHONOL |
ALLOY 48 |
- material code "K"
- grain-oriented silicon alloy
- high squareness and flux density
- high Curie temperature
|
- material code "A"
- grain-oriented nickel-iron alloy
- very high squareness and high core gain
|
- material code "H"
- nickel-iron alloy
- low saturation flux density, squareness, coercive force, and
core grain
|
|
Used in high-quality toroidal power transformers, current
transformers, high power saturable reactors and magnetic amplifiers. |
Used in saturable reactors, high gain magnetic amplifiers,
bistable switching devices, power inverter-converters, time delays,
flux counters and transductors. |
Used in proportioning magnetic amplifiers, special transformers,
and saturable reactors. |
SQUARE PERMALLOY 80 |
SUPERMALLOY |
|
- material code "D"
- square loop 80% nickel-20% iron allow
- high material squareness and core gain
- low coercive force and core losses for moderate to high
frequency applications
|
- material code "F"
- round loop nickel iron alloy
- exceptionally high permeability
- low core losses
|
|
|
Used in magnetic preamplifiers, modulators, and inverters and
converters with low power levels and minimum circuit losses. |
The ultimate in high permeability nickel-iron alloys.
Useful in pulse and current transformers, as well as in high
precision sensors and amplifiers.
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