| A magnetics products client had some favorable test results data relating permeability (m) to DC magnetizing force (H). The data seemed to visually fit a particular type of curve. They wished to take advantage of this and develop an algorithm and equation to include in product documentation.
The client had tried conventional curve fits without success. S&ST was brought on board at that point. We first used an equation found in the existing Magnetics literature and then used an advanced minimization technique to determine the coefficients. An even better fit was found by adapting and modifying curves generated from equations found in statistical analysis.
This "customized" form of the equation works beautifully and allows the client to publish the equation for its own customers. After a small amount of technical support (no charge), the client was able to use the computer program we provided to automatically and instantaneously output m values for input H or vice versa. Some of the specific items addressed included: |
