Design magnetic components with specialized simulation software

  • TRAFOLO is a 3D FEM simulation software for power electronics
  • Coupled electromagnetic and heat-transfer solver
  • High performance and parallelization exceeding 100 cores
  • User-friendly interface with templates and examples
Assembly view

Simulation of Low-Frequency Electromagnetic Behavior in Transformers and Inductors

Consumers expect their electronic devices to operate safely and without malfunctions, including burning circuitry’s unpleasant odor.
Simulation technology offers engineers a valuable tool to test their transformer models in various configurations, geometries, and scenarios. By conducting these tests in a digital environment, engineers can efficiently certify, optimize, and bring their transformers to market quickly and within budget constraints rather than relying on physical prototypes.

Validate your design against specification,

eliminate critical design errors before the first physical prototype is built or obtain deeper knowledge about your product. Use specialized transformer and choke simulation software.



fills the gap between academia and industry by providing verified results in a short timeframe.

Use of computer modeling helps with:

Shorten the technology research and development cycle. Run parametric studies in parallel on high-performance computers and save time.

Cut costs on wasteful physical prototyping. Once the numerical model is verified, you can reuse it for all your succeeding prototypes.

Simulations and creativity go hand in hand. Test risky ideas and designs for a fraction of the prototype cost.

Predict quality issues during the designing phase. Test your products in a virtual environment non-destructively and get an insight into stresses and temperatures inside materials.

Numerical models for inductors and transformers

  • Import CAD or use parametrized geometries for the most common core and winding types
  • Core loss models – Steinmetz and Generalized Steinmetz Equations
  • Winding loss models, including Dowell’s equation and homogenization*
  • Laminated electrical steel and ferrite, powder, soft magnetic cores
  • Select between transient or harmonic simulations to achieve desired accuracy
  • Supports waveforms from all circuits simulators (LTSpice, Simulink, PLECS, Simplorer and, etc.)
  • Automatic meshing and result post-processing
  • Material library with B-H hysteresis and temperature-depended conductivity
  • Computation of capacitance, inductance, and AC resistance


only for non-commercial projects

  • Examples for magnetic designs
  • Parametrically defined templates
  • Electromagnetic & heat solvers
  • High performance & parallelization
  • Extensive material library
  • Waveforms from circuit simulators




/month* per user

Everything in Academic plus:

  • Online onboarding
  • Priority support
  • Includes 4h of consulting services




/month* per license

Everything in Academic plus:

  • Online onboarding
  • Priority support
  • Floating license
  • Includes 6h of consulting services


*Prices may raise as the functionality of the software increases.


Flyback Transformer

A flyback transformer is a type of transformer used in switched-mode power supplies (SMPS). It provides isolation and step-up/step-down voltage conversion.

Transformer with Litz and Planar windings

A transformer incorporating Litz and Planar windings, offering improved performance in terms of reduced losses and enhanced efficiency.

Planar Inductors

Flat, compact design, typically used in applications where space is limited or where high power density is required. Convert Gerber files into powerful simulations.

Dual Active Bridge Transformer

Dual Active Bridge transformer allows the bi-directional transfer of electrical energy and provides isolation between windings. For this reason, they are used in applications involving high-power batteries, such as electric car chargers.

3 Phase Inductor

Three-phase gapped inductors made of electrical steel are commonly used in power transmission and distribution systems. These inductors filter out high-frequency harmonics in electrical power systems, which can cause interference with other equipment and reduce the system's efficiency.

3 Phase 4 Limb Inductor

Three-phase gapped inductors made of electrical steel are commonly used in power transmission and distribution systems. These inductors filter out high-frequency harmonics in electrical power systems, which can cause interference with other equipment and reduce the system's efficiency.

Drum Core Inductors

Drum core inductors are commonly used in power electronics and high-frequency applications, such as in power supplies, filters, and RF amplifiers. They are preferred over other types of inductors in these applications because of their ability to handle high currents and frequencies.

Toroidal Inductors

Toroidal inductors have a number of advantages over other types of inductors, including lower electromagnetic interference (EMI), better coupling between windings, and higher inductance per unit volume.

Wireless Charging

Wireless charging is a technique for transferring electrical energy to a device without a physical connection, using electromagnetic fields. In FEM simulations, modeling wireless charging involves analyzing magnetic field distribution, power transfer efficiency, and thermal effects in the system. This helps optimize coil design, positioning, and materials for improved performance and safety.

Soft Magnetic Composite Core Inductors

Soft magnetic composite (SMC) core inductors are made of iron or ferrite powder mixed with a bounding compound such as epoxy or silicone. They are employed in high-frequency power electronics, automotive systems, and renewable energy applications.

Induction Heating

Induction heating is a non-contact process that generates heat in conductive materials by exposing them to a time-varying magnetic field. It is widely used in metal processing, welding, heat treatment, and manufacturing industries.

Power Inductors

Power inductors are magnetic components used in electronic circuits to store energy and regulate current flow. Typical applications include DC-DC converters, power supplies, and automotive electronics. Modeling power inductors at high frequencies presents challenges due to complex electromagnetic behavior and parasitic effects.

Heat Transfer with Radiation Model

Transient or steady-state heat transfer simulations with heat sources set on coils and core. Additionally radiation model enhances temperature accuracy by a few degrees, particularly for high-temperature magnetics.

Hybrid Foil-Litz Windings

Medium-frequency transformers, the template is taken from the article.

Ferrite Core Inductors

TRAFOLO uses various numerical methods to resolve skin and proximity effect in high-frequency coils

Working with