JMAG at the Core of Simulations
- How do you provide your customers with products that exceed their expectations
Mr. Sato Many of our products utilize electromagnetics. Electromagnetic field analyses
are at the core of our design process, supporting us through product development.
One of the reason we implemented CAE was to measure the characteristics
of products through analyses so that we wouldn't need to build as many
prototypes. That is at least the simple explanation. Especially in today's
market, it has become very difficult to measure the characteristics of
products based simply on our experience, because the products that we handle
are getting smaller and smaller. Even when we think we can estimate these
characteristics based on experience, we find we can't. That is when we
realized that without CAE we could not continue to advance innovation.
If a mistake is made, we can't just simply fix it. An optimal design is
required to provide the fastest and most appropriate solutions to our customers'
requests. We have had this point of view since implementing CAE in the
1980's. We are able to offer our customers solutions within a week when
it only requires simulation.
Mr. Tsuruta Our theme of miniaturization cannot be achieved without solutions that
push the limits of designs. We selected and implemented JMAG from a variety
of software options that are available, because it analyzes the characteristics
of motors, which are the main products we handle. We can create a model
in JMAG that rotates by simply specifying the slide mesh option and amount
of displacement. This has allowed us to drastically reduced that amount
of time required to create analysis models and it is one of the greatest
benefits when using JMAG.
- How are you using JMAG?
Mr. Sato First, let me outline our organization. Electromagnetic simulation and
analysis of materials takes place at our Nagano Technical Laboratory by
our development team. There are other members of the organization that
perform analyses in other locations, but Mr. Tsuruta and I are the two
who specialize in analyses. We mainly perform complicated analyses that
cannot be handled at the other facilities as well as provide CAE training.
Mr. Tsuruta We have a long history with magnetic field analysis that started by begging
college professors to teach the finite element method and programming in
the 1980's. At that time, workstations and software were very expensive,
and at one point, we did a lot of the programming in-house. At the beginning,
the analysis results were sometimes good, sometimes bad, with a level of
accuracy at about 80%.
Mr. Sato After that, there was a period when we used software besides JMAG, but
none of the software we were using provided functions to account for motion.
We implemented JMAG in 1998. We decided to use JMAG because it offered
enhanced functions for analyses and the models that we could create easily
could completely accounted for motion. This allowed us to drastically increase
the frequency we used magnetic field analyses. JMAG was then developed
to handle free mesh, 3D CAD models, and now our designers are even starting
to use JMAG. The hurdle to start using magnetic field analyses is much
higher than structural analyses, but through training, our designers can
now carry out the same calculations that the analysis specialists are performing.
JMAG has become such a vital tool, that without it, we would have trouble
even talking with our customers.
Mr. Tsuruta There are about 10 employees that use JMAG frequently. I have created
an instruction manual that focuses on our products like motors and actuators,
and I train the designers that need to be able to perform analysis. Only
the methods necessary to calculate the characteristics of our products
are included in the manual, so for a quick learner, they are able to calculate
the characteristics of a product by themselves using the manual after some
instruction. The manual only describes how to "use this value for
the nonlinear and iteration settings as well as the convergence settings,"
and then, if they want to know the logic behind these settings, I teach
them. But our primary goal is to have them use JMAG as a tool, and then
teach them the logic behind it. This allows us to estimate the time it
takes for a calculation, and although it is not perfect, we can provide
results to our customers without losing the accuracy or quality of an analysis.
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