Implementing JMAG

JMAG at the Core of Simulations

- How do you provide your customers with products that exceed their expectations so quickly?

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.

Lens actuators for cell phones


  1. Implementing JMAG
  2. JMAG-Express
  3. JMAG Version 10.0
  4. JMAG Application Catalog
  - [Efficiency Analysis of an IPM Motor]
  - [Superimposed Direct Current Characteristic Analysis of a Reactor]
  5. Technical Report Vol.1
  6. For Anyone Considering Implementing JMAG-Designer
  7. List of Distributors

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