Infolytica MagNet v7.8 Software Suite Enhances Electromagnetic Field Simulations

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Easier virtual prototyping with latest release of low frequency electromagnetic, electric field and thermal design & analysis software

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The MagNet 7.8 release improves the nonlinear approximation of the time-harmonic solvers, such that the accuracy of the iron losses is close to that of a transient solve with a 90 % reduction in solution time.

Infolytica Corporation today released new versions of their industry-leading MagNet, ElecNet, ThermNet and OptiNet simulation software. There are many significant improvements and new features in this release, including improved nonlinear material treatment in AC/time-harmonic simulations and expanded circuit modeling tools for complex control systems.

A virtual prototype that is increasingly realistic – that is the driving force behind the improvements and new features in MagNet, ElecNet, ThermNet and OptiNet v7.8. The suite of computer aided engineering software can handle the most complex electromagnetic and electric field simulation requirements.

Engineers, scientists or designers can simulate the real physics and complex systems which impacts the electromagnetic fields or electric fields and in turn, the predicted performance of a device or component.

Improved Accuracy of the Calculated Iron Losses

The design of electric transformers, motors, inductors and other ferromagnetic-cored devices require accurate treatment of nonlinear effects, which also affect the accuracy of iron losses. Transient solvers that have significantly longer solution times, accurately handle nonlinear effects. Solution times, nonlinearity effects and losses are important in the design of large devices such as power transformers. Time-harmonic solvers balance the need of fast solution times and non-linear approximation.

The MagNet 7.8 release improves the nonlinear approximation of the time-harmonic solvers, such that the accuracy of the iron losses is close to that of a transient solve with a 90 % reduction in solution time, as shown in the table below. The table compares the results of the two solvers in a 100 kVA single-phase power transformer.

The accuracy of the iron losses with respect to the transient solver is further confirmed by the iron loss distribution (W/m3) as seen in the following figures.

Accounting for Switching Effects

Switching effects in nonlinear inductors, transformers and rotating electric machines can be analysed within MagNet 7.8, by including current and voltage controlled switches. Accounting for switching effects, in addition to core nonlinearity, gap and 3D effects, will significantly improve the design of inductors used in switch-mode converters and power supplies, and the design of wireless power transfer coils. A 3D MagNet model incorporating controlled switches in its circuit can fully consider these effects. For example, the following 27 kW boost converter circuit steps-up the battery voltage from a DC bus voltage of 200 V up to 650 V, for an electric vehicle drive. The PWM driven voltage controlled switch regulates the output voltage, and can be used to analyze the effect of switching frequency on inductor losses. A current controlled switch can be used to regulate the inductor or load current.

The inductor average current was regulated to around 40 A as shown in the next chart using a current controlled switch. The instantaneous inductance was then determined from the energy and flux linkage methods, whose average is about 420 μH, as seen in the inductance chart.

Pricing and Availability

MagNet, ElecNet, ThermNet and OptiNet v7.8 are now available for Microsoft Windows 7, 8 and 10. For more information or to request a demo, pricing or software evaluation, please contact an Infolytica Corporation representative nearest you.

About Infolytica Corporation

Infolytica Corporation has offered state-of-the-art design software for electromagnetic and electric field simulations since 1978. Engineers from a wide range of industries trust our software to understand and predict the performance of their device in applications such as electric machines, sensors and non-destructive testing (NDT), induction heating, MRI, shielding, power transformers and much more.

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The simulation results presented were performed on the following platform
Processor: Intel Core i7-4930K @ 3.40 GHz
Memory: 32 GiB, Quad-Channel DDR3-1600
Operating System: Windows 8.1 Professional

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Chad Ghalamzan
Infolytica Corporation
+1 (514) 849-8752 Ext: 300
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