Magnetics Business & Technology - July/August 2019 - 18

PRODUCT NEWS

Soft Ferrite Core Material with Low Core Loss
in High Frequencies Developed by Hitachi
Hitachi Metals has developed
a new soft ferrite core material designed to handle the
high frequencies required in
the increasingly high-speed
networks operating in data
centers and automobiles, also
for smartphones, servers and
other network equipment.

generation of power circuits making it ideal for transformer and
inductor components that are more efficient, reliable, compact
and lightweight than conventional materials, the company says.
For more info, go to www.hitachi-metals.co.jp.

Metrolab's New Magnetic Field Mapper with
Latest NMR Technology

Its developers report a 30% improvement in core loss which they
attribute to new metallurgy and heat treatment technology. The
company is now mass producing the new material, ML27D, anticipating it will become a key enabler for downsizing and energy
savings.
As information processing becomes more sophisticated, servers
and other network equipment handle increasingly larger capacity and operate at higher speed amidst continuing demands for
saving energy. The market demand is particularly intense in data
centers where network equipment needs to be smaller size and
produce less waste heat to curb air-conditioning costs which
make up the bulk of operating costs.
The power supplies used in such equipment need to have higher
switching frequencies for a more compact, efficient design while
their components such as the power semiconductor switching
elements, transformers and inductors need to offer low core loss,
explained the company.
When the switching frequency of a power supply is raised from
around a hundred kHz to several hundred kHz or more the core
loss of the core materials that are the key elements of transformers and inductors increases, resulting in lower power conversion efficiency and greater generation of heat. There is growing
demand for core materials that offer low core loss even in highfrequency range to reduce this generation of heat and to stabilize
operation of the surrounding components.

The NMR Magnetic Field Camera MFC2046 from Metrolab
is built on the superior sensitivity of the NMR magnetometer
PT2026, with a choice of two probe-array geometries.
To map whole-body MRI magnets, the probe array family
MFC9046, with a classic Metrolab design, supports a DSV up
to 500 mm. This family now also supports smaller probe. The
actual sensor that is placed in the magnetic field, the NMR probe
contains the NMR sample; the Hall probe - arrays such as, but
not limited to, a 14-probe array in a 160 mm bore. The centre of
a solenoidal magnet, where the magnetic field is concentrated
is suitable for small animal or extremity MRI magnets. Custom
designs can be manufactured upon request.

The new soft ferrite core material is manganese-zinc ferrite.
Hitachi says that Its original powder metallurgy and heat treatment technologies have improved core loss more than 30% in
the range of 300 to 500 kHz compared to existing materials.
Offering low core loss from low-temperature to high-temperature
environments, it can reduce the energy consumption and heat

Magnetics Business & Technology * July/August 2019

The all-new MFC9146 family of probe - The actual sensor that is
placed in the magnetic field. The NMR probe contains the NMR
sample. The Hall probe arrays supports magnet bores as small
as 40 mm. They map a cylinder by rotating two lines of probes
around its center line.
Metrolab's new generation of magnetic field cameras is based on
the very precise pulsed-wave NMR nuclear magnetic resonance;
a resonance phenomenon seen when you irradiate a sample in a
magnetic field with an RF field. Resolution measures the ability of
a magnetometer to distinguish two nearly identical field values.
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Magnetics Business & Technology - July/August 2019

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