Magnetics Business & Technology - May/June 2020 - 27

PRODUCT NEWS
A conductive steel plate is attached to a donut-shaped magnet.
This along with a second steel plate creates the magnet system.
When separated, or open, the magnetic flux flows into the air
around the magnet. The key to the strength of the connection is
that virtually all the magnetic force is used to hold the two parts
of the magnet system together.
When closed, almost all the magnetic force flows within the magnet system because the two steel plates create a "short circuit".
The magnetic flux is then put to use holding the two sides together instead of being wasted into the air. This efficiency results
in a magnet that's very powerful for its size and cost.
"Balance is important. Romed engineers use advanced mathematical modeling to ensure that the quantity of the steel and its
configuration are optimized to prevent wasted flux and ensure
the superior functionality of Romed's patented magnetic snap
fastener system," stated Reiter.
Located in Connecticut, Romed embraces a philosophy of constant innovation. Its engineers are continually developing new
styles and strengths of magnetic closures as well as its other
fasteners, and has the capacity to tailor its production for specific
client applications including the integration of custom logos and
finishes. With production and distribution capacity in the United
States, Europe and Asia, Romed offers a comprehensive line of
magnetic and mechanical snap systems including a full complement of insert moldable spring sockets, studs and posts to be
used in today's medical, health and sports products.
For more info see www.romed.com.

New Manufacturing Process
at Vacuumschmelze Improves
Nanocrystalline Cut Cores

Usually, core losses increase significantly after cutting. Each
step of the process has been reviewed to minimize this disadvantage, according to Frank Schnelle, product manager for energy
conversion and automation.
A new winding technology was introduced to achieve filling
factors of up to 80%. After heat treatment and impregnation,
the very brittle, nanocrystalline core is cut in an optimal separation process that combines the superior quality of the cut cores
with efficient process times. The subsequent final machining of
the cut surfaces contributes to a further significant reduction in
losses at high switching frequencies.
"The higher filling factor enables more compact designs that
reduce the footprint and volume of the end application at continuous operating temperatures of more than 130 degrees C," says
Schnelle. "The most important advantage, however, is clearly the
significant reduction in losses, which are only slightly higher than
the losses of unseparated cores of comparable size."
Enabling compact designs with low-volume production runs, the
cores are particularly suitable for future-oriented applications in
medium frequency transformers for the railway market, smart
grids or fast-charge columns for electric vehicles.
For more info see www.vacuumschmelze.com.

Tape Wound Toroidal & Cut Cores
That Outperform
Transformer Laminations

The Most Advanced Grades
of Magnetic Materials &
Optimum Core Performance
Properties
* Amorphous Alloys, Nanocrystalline
Alloys, Microsil™ and more!
* Shortest lead times for any type, gauge
and quantity of soft magnetic materials
* Standard and custom core designs,
construction and matching that exceed
transformer, core and coil specifications

Vacuumschmelze reports that it has developed a new process
for manufacturing nanocrystalline cut cores with exceptionally
low core losses and high dynamic range. The company says it
has considered and optimized its entire process chain for manufacturing the cores.

www.MagneticsMag.com

Achieve Near-Perfect
Magnetic Circuits in:
* Power/navigation systems for Aerospace, Defense & Electric Vehicles
* Transformers/GFCI's for industrial,
residential & utility controls products
* Power supplies for medical and
communications electronic devices

Contact Our Technical
Team Today!
New Jersey & California 888-892-8392
Web: MagneticMetals.com
75+ YEARS
OF CUSTOMER
SERVICE

May/June 2020 * Magnetics Business & Technology

https://www.vacuumschmelze.com/ https://www.romed.com/ http://www.MagneticMetals.com http://www.MagneticsMag.com

Magnetics Business & Technology - May/June 2020

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