Magnetics Business & Technology - Summer 2017 - 16

NEW PRODUCTS
Premier Magnetics Drum Cores for EMI Filtering
And Switch Mode Power Supplies

Premier Magnetics has introduced a line of low-cost, high-performance drum core inductors designed for EMI filtering and switch
mode power supply applications. With a product offering of more
than two dozen models with inductance values from 100 to 10,000
µH, the PM-R series boasts low DC resistance (DCR), providing
low temperature rise at high peak currents. Their combination of
high peak current and high self-resonant frequency (SRF) make
the PM-R series inductors a
well suited drop-in replacement for lower-performing
drum core devices. In applications where the devices' maximum height of 10.0
to 11.5 mm is acceptable,
the PM-R series offers a
cost-effective alternative to
surface-mount inductors.
Premier Magnetics' PM-R
drum core inductors are
offered in two series, PMR2 (7.5 mm, dia. by 10.0
high, max) and PM-R3
(9.5 mm, dia. by 11.5 high,
max), each offering models
with a range of 100 µH to
10 mH. Both series of inductors are available with sleeving (125°C);
and without sleeving (155°C). Standard operating temperature
range is -40°C to 130°C, with higher temperatures available. The
radial-leaded components are RoHS compliant.
"The new PM-R drum core inductors are an optimal choice in
applications that need a low-cost solution in a size that can be
manipulated to fit into tight spaces," said Jim Earley, president of
Premier Magnetics. "These devices perform particularly well in high
peak-current applications."

Miniaturized LC Filters for Suppression of EMI

TDK Corp. has released the MEM1005PP251T, a LC filter for EMI
suppression. With dimensions of 1.0 by 0.5 by 0.35 mm the filters
are well suited for use in smart phones and base stations. The
usual method for suppressing interference in the communication
frequency bands of smart phones and other devices is to use capacitors or inductances, or a combination of these components.
In contrast to discrete solutions, the MEM1005PP251T 2 combines
capacitors and an inductance in the form of a Pi filter in a single
component. As a result, 61 percent less space is required and there
is a reduction in the overall number of components.
Because of the special design, the component offers low-loss
operation and a DC resistance of just 0.8 Ω, which represents a
reduction of 69 percent when compared to previous products. The
new filter offers a rated current of 350 mA, which is 3.5 times more
than the MEM1608P series. With these properties the combination
element offers the highest possible performance currently available
in its class. In addition, the new filter is designed for a very wide
temperature range from -55°C to 125°C, whereas previous series
only covered the range from -40°C to 85°C. Due to expansion of
rated current and the wide temperature range, it allows a high degree of design flexibility.
The attenuation in the frequency range from 700 MHz to 3 GHz,
which is used by mobile communications, is in excess of 30 dB.
This means that interference is well suppressed and the reception

Magnetics Business & Technology * Summer 2017

sensitivity increases significantly. In the future, TDK will extend this
product line to meet the design requirements for a broad spectrum
of devices for wireless communication.

ANSYS 18.1 Expands Pervasive
Engineering Simulation

Engineers can create next-generation products quicker and easier
with the release of ANSYS 18.1. ANSYS continues to build upon the
digital exploration and digital prototyping capabilities released in
ANSYS 18, enabling organizations to simulate more upfront, limit
costly late-stage design changes and bring their innovative products
to market faster and easier.
"Products are becoming smarter and organizations are adopting simulation across the entire lifecycle to digitally gain insight
into product choices at every stage of the process, a growing trend
we call pervasive engineering simulation. Our customers, large and
small, are developing the products of tomorrow and they know that
simulation is the only way to gain the engineering insight they need
to make those products a reality," said Mark Hindsbo, ANSYS general manager. "This latest release continues the tradition of having
the most complete and accurate solution portfolio in the industry,
so our customers can trust the simulation results to conquer the
toughest design challenges and accelerate product innovation. And
to bring these capabilities to more and more users, enabling every
engineer to use simulation in their product development."
In the fluids suite, ANSYS 18.1 delivers faster, higher fidelity, enabling users to simulate more quickly and accurately. Users will
benefit from greater flexibility setting up periodic boundaries to
deliver high fidelity results up to 9 times faster for in-cylinder diesel
simulations. Turbomachinery designers can now reduce problem
size and time to convergence radial turbomachinery simulations
when they apply complex vibrational modes from a cyclic modal
analysis to CFX flutter analysis. ANSYS 18.1 also provides further
improvements to workflow and meshing that enables novice users
to quickly become productive while providing new opportunities
for experienced users to excel.
In the structures suite, ANSYS 18.1 has added new capabilities
within its topology optimization technology to analyze complex
materials and optimize designs making it easier for organizations
to manufacture products. Users can now combine load cases from
modal and static structural analysis to look at designs that meet frequency and structural requirements. Designers will benefit from the
new optimization constraint capabilities, giving them more control
over manufacturing constraints to help ensure the most optimized
designs are built. ANSYS 18.1 offers new functionality to increase
the value simulation brings to organizations. Improved high-performance computing capabilities enable users to design products
smarter and faster early on in the design process.
Designers will benefit from new significant capabilities in the
electromagnetics suite. ANSYS 18.1 expands its noise-vibrationharshness (NVH) analysis to include both magnetostriction and induced magnetostriction effects. That greatly enhances the accuracy
of NVH studies of electrical machines and transformers. NVH is
an important analysis required by manufacturers of electric motors used in hybrid electric vehicles, appliances and commercial
transformers and other application where quiet operation of the
machine is an essential design parameter. Also, ANSYS 18.1 is enhanced with new a characteristic mode analysis solver. This new
capability enables electronics designers to study antenna placement
and antenna synthesis for devices such as a smart watch, mobile
phones and Internet of Things devices. The characteristic mode
analysis accurately predicts the fundamental resonance character-

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