|
Magnetic Metals
Corp has over 30 years experience manufacturing soft magnetic
strip cores using grain oriented silicon steel, nickel,
cobalt and amorphous alloys. We strive to produce the highest
quality tape-wound cores in the industry, that mechanically
and
electrically meet your requirements and our product specifications.
We excel in custom magnetic applications. However a “standard” core
exceeds industry standards in many areas:
- Wide selection
of raw materials suitable for a broad range of applications
- Precision
material slitting
- Superior
high dielectric nickel, cobalt and amor-phous metal
coatings
- State-of-the-art
heat treating and stress relief annealing
- Bonded with
high temperature, heat stable, epoxy resins. Cores
are typically heat stable to 350°F (175°C)
and up to 425°F (218°C) with special processing
- Precision
cutting
- The mating
surfaces of our cores are polished to a minimal air
gap of typically 0.75 thousandths
of an inch
- Mating surfaces
are beveled to reduce delamination
- Chemical
treatment of polished surfaces to maximize corrosion
resistance
- Mechanical
tolerances are held to EIA standard RS-217-A for “C” cores.
All other configurations are to specified tolerances
- Each
core is marked with a part number and date code for
traceability
- Robust packing
is used to prevent damage for shipment around the world
There is much
that can be done to customize a core to meet your specific
needs. Some of the processes that can improve a core’s
performance are detailed in the following bullets:
- Double impregnation
eliminates loose laminations that may vibrate when
the core is excited. This combined with diamond lapping
further reduces gap vibration
and acoustical noise
- Diamond
lapping also reduces gap volt-amps (VA) for lowest
possible current. Both low noise and gap VA
can be assured by diamond lapping to an approximate
0.15 thousandths of an inch surface flatness
- A special
thermal cycle can be performed to minimize gap shifting
for the ultimate
in low noise performance or to compensate for operating
temperatures up to a maximum of 425°F (218°C). This is a desirable
option when normal gap shift during thermal cycling cannot be tolerated
- Epoxy
coating can be substituted for taping when it is necessary to wind
directly on the core or maximum protection against high voltage
breakdown is required
- Toroids
can be cut on the center-line or gapped to meet an
inductance or a customer required
gap spacing
- Multiple
gaps can be cut in a core to reduce fringe flux and
gap power losses
- Rounded
or beveled edges can be made to reduce corona or delamination
- Nonstandard
or unusual shapes and sizes can be engineered for
novel applications
- Special
mechanical and electrical testing can be performed
to insure conformance to your
design requirements. For example, we can perform
pulse testing for pulse widths down to 100 nanoseconds and pulse energies up
to 4 joules with complete
waveform analysis capability
|
