WEBVTT - Alternating fields simulation with QuickField

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Hello and welcome to our webinar. Today we will discuss simulation of alternating fields in QuickField software. 

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My name is Vladimir, I will make a short introduction and then my colleague Alex will continue with live presentations of QuickField simulation.

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QuickField is simulation software for electromagnetic, heat transfer and l stress analysis problems using the Finite Element method.

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Analysis options include three suites – Magnetic, Electric and Thermostructural, which may be further divided into Magnetostatics, AC Magnetics, Transient Magnetics, Electrostatics, DC Conduction, AC Conduction, Transient Electric analysis, Steady state heat transfer, transient heat transfer and stress analysis modules.

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All formulations are available for 2D setups: plane-parallel or axisymmetric, and QuickField 6.6 allows also 3D analysis for Electrostatics, DC Conduction and Steady State heat transfer. Number of 3D analysis options will be increased in future releases.

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QuickField also offers many types of coupled multiphysic analysis, where the results of one simulation are used as sources or material data for other simulations.

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For example mechanical deformations due to electromagnetic forces, or temperatures caused by the Joule heating of electromagnetic devices may also be simulated with QuickField.

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As you see, the range of problems which may be solved by QuickField is huge. Today we will discuss how to simulate alternating fields.

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And we will show models which use AC or Transient analysis modules.

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As you see both AC and Transient analysis options are offered for Electric and Magnetic problems. And for heat frensfer we also offer Transient Heat transfer simulations.

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Let's see what is the difference between these two approaches. If the problem is formulated as time-harmonic with one frequency – then using all field components and currents may be considered as phasors, in complex form having the real and imaginary parts, or amplitude and phase. So this approach does not require time integration. If you analyze a transient process by time integration – then at each time step you need to solve a field problem.


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Complex method, used in QuickField AC modules, allows to get just one field solution – because then we may use amplitudes and phases for calculation of any momentary values. 

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But this requires us to limit material properties by linear only, if the material property depends on the field intensity – then the system response can not be presented by just one time-harmonic value. 

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On the contrary, transient analysis based on time integration does not apply any limitations on the materials. They may be non-linear – but solution time depends on the number of time steps required, and may be much longer than needed for AC. 

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This slide shows what parameters should be specified for AC and Transient analysis models in QuickField magnetic packages. 


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In AC problem properties you need to specify the frequency. In Transient there is an additional tab in the problem properties, where you need to specify timings.

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In AC you need to define phasor magnitudes and initial phases. And in Transient problems you are not limited by time-harmonics only, you can specify practically any time-dependent functions or pulses using a set of predefined formulas.

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How exactly these problems are defined you will see in detail in the next presentation by my colleague Alex.

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Both AC and Transient modules, as well as any other 2D QuickField components, feature Application Programming interface, allowing access to internal functions and data structures from other Windows applications. 

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This allows expanding QuickField capabilities, automation of the repetitive tasks, or integration with other packages.

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And very important is that all this huge range of features is offered as a very straightforward and user friendly package. 

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QuickField requires no dedicated training – my colleague Alex will prove it.