WEBVTT - Magnetostatics simulation with QuickField 00:00.000 --> 00:18.000 Hello everybody and welcome to our webinar. Today we will discuss one of the most important types of analysis, offered by QuickField – DC Magnetics. As usual, I will make a brief introduction and then my colleague Alex will show various DC Magnetic Analysis simulation models in full detail. 00:18.000 --> 00:36.000 QuickField is a Finite-Element analysis package with a wide range of analysis capabilities. They include DC, AC and Transient magnetics, Electrostatics, DC and AC Conduction, and thermostructural family of modules for static and transient heat transfer and for linear stress. 00:38.000 --> 01:11.000 QuickField also supports multiphysics analysis, where the result of one simulation may be used for another simulation. For example heat losses found in the electromagnetic simulation may be then used as sources for heat transfer analysis. Or magnetic forces may be automatically transferred to the stress models to estimate the deformations. Or static simulation used as an initial condition for the transient process simulation. 01:11.000 --> 01:56.000 Another important feature of QuickField is its open object interface for application programming, which compliments interactive user interface and allows combined use of QuickField Finite Element core with other programs. MS Office applications and MatLab scripts may interact with QuickField objects and data structures the same way as our own parametric analysis tool LabelMover controls QuickField for serial analysis or optimization. You may also develop custom programs which expand QuickField or automate repetitive operations. 01:56.000 --> 02:08.000 These features are part of all QuickField editions and types of analysis. Let's now specify what is DC Magnetic analysis, and what exactly QuickField can do for such applications. 02:08.000 --> 02:34.000 DC Magnetics is the type of electromagnetic analysis where the field sources are either permanent magnets, or DC currents. It is a static problem, and to perform the simulation you should follow three simple steps – define the geometry, specify the physical data, and after getting the results – analyze them using the powerful Postprocessor. 02:34.000 --> 02:48.000 Every new simulation starts from the problem setup dialogue, where you should select the type of analysis, Magnetostatics in our case, and the model class plane-parallel or axisymmetric. Other parameters are optional. 02:49.000 --> 03:09.000 In the Model Editor you need to draw the geometry (it can also be imported from DXF file or SolidWorks), and assign labels to all objects which have physical properties. There are three types of geometric entities in QuickField – vertices, edges and blocks. 03:09.000 --> 03:25.000 Vertices are corner nodes of the model topology, edges are straight lines or arcs between them (boundaries between different media), block is an area surrounded by the edges (media with the same properties). 03:28.000 --> 03:59.000 Final step of the model geometry definition for Finite Element Analysis is the finite element mesh generation - but for majority of situations you may simply rely on QuickField which generates the smooth mesh automatically. It also allows automatic mesh refinement: denser mesh in the regions where the field gradients are high. Experts may also control the mesh manually by setting the manual spacing in every or some vertices of the model. 04:00.000 --> 04:34.000 This slide shows what properties in DC Magnetic problems need to be specified for block, edge and vertex labels. As you see – for blocks you can define the constant or non-linear magnetic permeability (BH curve points table should be entered for non-linear), permanent magnet coercive force, or the DC current distribution. Many parameters may be defined by coordinate-dependent formulas to specify the space variation of the material properties or sources. 04:34.000 --> 05:04.000 Edges may have known magnetic potential or tangential field strength, you may also specify zero normal flux or periodic conditions. Formulas are allowed here as well. These boundary conditions allow dealing with all practically required situations - the field which fades far from the source, surface currents, or the surface of superconducting material which cannot be penetrated by the magnetic field. 05:04.000 --> 05:15.000 And if you have nodes with known magnetic potential, or linear currents – they may be specified for every Vertex label property. 05:15.000 --> 05:43.000 When the model geometry and physical properties are fully defined, the problem may be solved and then you will have the field distribution calculated. Result analysis is performed using DC Magnetic Postprocessor. It allows display of various field maps, including color maps of the flux density or potential distribution, magnetic field lines; vector maps for the flux density or the field strength. 05:43.000 --> 06:05.000 You can visualize the field parameters in any point. Local field data displayed include coordinates, potential, flux density or field strength permeability components, magnetic permeability (convenient for non-linear magnetic materials) and energy density in a given point. 06:05.000 --> 06:20.000 And you can create the contours to calculate volume and surface integrals, including mechanical forces, torques, energies, and average values per surface or volume. You will see it in more detail in following presentations. 06:20.000 --> 06:41.000 And the last thing I need to mention – but not the least important – is the fact that QuickField is an extremely easy and straightforward package, with a very friendly user interface. You do not need specialized training to start using it. You will see it in the next parts of our webinar where Alex will show you DC Magnetic models. Alex – please continue.