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Flux Applications for Transformers

For transformer modeling, Flux features numerous tools and capabilities allowing an accurate and efficient computation. Dedicated to 2D and 3D electromagnetic and thermal finite elements analysis, Flux enables to simulate electric, magnetic and thermal behavior of the device in static, harmonic and transient states.

Flux multiparametric solver gives an easy access to a tremendous amount of results such as:

  • Magnetic quantities in all the magnetic parts (flux, permeability)

  • Electrical quantities in the coils as well as in all the components modeling the supply and the loads

  • Power balance: power dissipation (Joule losses) in the different conductive parts of the geometry as well as iron losses in the core (Bertotti, LS models)

  • Force on coils

  • Spectral analysis of any quantity

  • Computations on various supports: points, paths, grids, groups of regions

Steady State AC Magnetic

The Steady State AC Magnetic application allows modeling transformers and running the tests to design any kind of transformer in 2D and 3D: No Load test and Short Circuit test. From these cases, all the electromagnetic quantities can be easily determined to analyze accurately:

  • The behavior of the transformer (direction and intensity of the induction, saturation of the core)

  • The yield at the current operating point

  • The different losses (Joule losses, Iron losses, Stray losses, Eddy Current losses in the windings).

Transient Magnetic study

Simulating transient behavior of any kinds of 2D and 3D transformers (single or three phases, current transformer, autotransformer) is possible with Flux. Different phenomena like inrush currents or geomagnetic current effects can easily be modeled and studied.

Electrostatic analysis

Thanks to the Electrostatic application, the study of electric fields permits preventing dielectric breakdowns between the coil windings. It also allows computing the parasitic capacitance between each winding.

Thermal analysis

To combine both electromagnetic and thermal aspects, the Flux multiphysics context can create a link between two applications to simulate both computations on the same project. Easy exports of quantities between applications allow the user to examine every physical aspect of its model (heating of the tank with eddy currents for example).

Performances optimization

Using advanced optimization strategies based on Design of Experiments approach, optimization allows performing quickly and efficiently optimizations with several objectives and constraints. It is possible for instance to optimize the transformer performances and minimize the cost by respecting several constraints (saturation, max current, size).

Modeling the drive

The transient behavior of a transformer is widely dependent on its drive. Flux features co-simulation capabilities enabling the design, within the same simulation run, of the device and its drive taking into account saturation, Eddy currents, control loops. All the electric characteristics of a transformer (resistances, magnetizing and leakage reactances) can also be represented as an equivalent model and be implemented in a complex system.

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