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For the rapidly evolving and expanding electrical machine technology industry,
new simulation tools offer the most value to engineers and designers
Predicted NVH vibration response
under test conditions. Appropriate
boundary conditions are required to
predict the observed behavior
A parametric model build simplifi es the simulation process, allowing engineers
to spend more time interpreting their results as part of a CAE-led design process
192 // July 2019 // www.electrichybridvehicletechnology.com
Simulation of a traction motor
under typical bench-test conditions
Changes in CAE
The last 30 years has seen
a huge transformation in the
CAE industry with simulation
changing from being solely the
domain of specialists within an
analysis department, to a discipline
where today a wide range of
engineers and designers can,
and are expected to, use.
One area where this change is
evident is in the rapid expansion
into electrification in the automotive
sectors. Electrified drivelines require
consideration, not only of
electromagnetics, but also of their
structures, dynamics, fatigue,
thermal, tribology and control – all
of which may require the use of
di erent CAE packages.
In the past, electrical machine
designers may have specialized in
electro-magnetic analysis before
passing finalized machine designs
‘over the wall’ to specialists in other
fields. However, the push to innovate
to meet new electrification
challenges means that electrical
machine technology is moving fast.
Machine designers are challenged
to achieve higher torque densities
and higher speeds, and increasingly
integrated systems mean that
component analysis can no longer
be demarcated in the electrical
realm and the mechanical realm.
In this changing ecosystem, it is
no longer su icient to rely on
previous successful processes as
di erent physical mechanisms into
separate design stages may neglect
important system interactions and
can result in time-consuming and
costly iteration loops if these are not
identified until the prototyping stage.
Recognizing the electrical
machine designer’s need for reliable
tools to conduct not only
electromagnetic analysis but also
structural analysis, whether they are
considering the machine in isolation,
or as part of a complete system, has
led to Romax Technology expanding
its product o erings. Celebrating its
30th anniversary in 2019, Romax has
a long-standing and proven
capability of electro-mechanical
simulation and design, from
rotor-dynamic simulation
capabilities for industrial generators,
through to tools for simulation of
motor vibration, as well as industryleading
expertise in bearing design
and analysis.
Working alongside leading
automotive OEMs and Tier-1
suppliers on electrical machine
consultancy and design projects,
Romax has identified the gap in
current simulation capability for a
dedicated, electro-mechanical
analysis tool. Romax Evolve is part
of the company’s Nexus simulation
platform and builds on its structural
analysis experience by bringing
together the required tools for the
structural and dynamic analysis of
electrical machines into a single,
application-specific tool.
By coupling proprietary tools to
leading electromagnetic simulation
tools via custom workflows and
interfaces, Romax Evolve sits at the
heart of a broad electrical machine
analysis ecosystem. Incorporating
a simplified, parametric model build
process with analysis methods,
alongside new capabilities including
an embedded acoustic solver,
Romax Evolve brings complex
simulation to the non-expert, and
helps support the multi-fidelity,
multi-disciplinary design process
that is required by the changing
CAE industry.
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