Electromagnetic design tool for rotating electrical machines provides precision FEA models

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By eeNews Europe

Cobham’s Machines Environment is an application-specific extension to the Opera electromagnetic simulation package. It provides a front-end to the simulator that speeds design entry by means of Wizard-style dialog boxes. Users select the style of motor or generator they want to design from a library of all common types, including induction, brushless permanent magnet and switched reluctance motors, and synchronous motors or generators. Then, dialog boxes allow the user to enter parameters to define mechanical geometry, material properties and electrical data, and the FEA model is automatically created.
The use of parameterized models and the ability to quickly load and modify previous designs has always made it possible for users to perform ‘what-if?’ design investigations. Now, to extend these possibilities to the maximum, Cobham has integrated a unique optimization tool that makes it simple for users to find the best solution across the design space.

Cobham’s Optimizer ‘intelligently’ selects and manages multiple goal-seeking algorithms including stochastic, descent, particle swarm and Kriging to eliminate the need for manual intervention. Setting up an Optimizer run from the Machines Environment has now been made as easy as the design entry process. Because most FEA simulations can take as little as a few seconds, the integrated software makes it feasible to thoroughly explore the design space. The 2D Machines Environment is now in its fourth generation, and Cobham has developed an extensive library of rotating machine design styles, and design components. Users also have open access to the scripts that generate the models, and can modify them at will to automate proprietary motor and generator design concepts. A library of common material properties is also included in the design software. A three-dimensional version of the Machines Environment is optionally available.

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