ANSYSWorkbench90电磁学教程实例课件.ppt

1、ANSYS Workbench 9.0 ElectromagneticsPaul LethbridgeContentsWorkbench Electromagnetics Workbench Emag RoadmapDesign Modeler Enclosure Symmetry Winding Bodies Winding ToolSimulationWorkbench Emag Roadmap LF Emag capability will be exposed over several release cycles:3D Magnetostatics(9.0)3D Current co

2、nduction(10.0)3D Electrostatics Circuit elements Time transient&2DWorkbench v9.0 is the first release with electromagnetic analysis capability.Support solid and stranded(wound)conductors Automated computations of force,torque,inductance,and coil flux linkage.Easily set up simulations to compute resu

3、lts as a function of current,stroke,or rotor angle.Workbench Emag capability is mapped to&accessed via:ANSYS Emag(stand alone or enabled task)ANSYS Multiphysics license keys.Workbench Emag Markets Target markets:Solenoid actuators Permanent magnet devices Sensors Rotating Electric machines Synchrono

4、us machines DC machines Permanent magnet machinesContentsWorkbench Electromagnetics Workbench Emag RoadmapDesign Modeler Enclosure Symmetry Winding bodies Winding ToolSimulationEnclosure&Fill ToolsDesign Modeler(DM)includes two features to allow a user to create a volumetric“field”body associated wi

5、th a solid model.Enclosure tool:Released at 8.0.This tool is used to completely enclose the bodies of a model in a material typically required for an Emag analysis.Fill Tool:Released at 9.0(Beta at 8.1).Similar function to enclosure,but only fills interior cavities.Example of a hemispherical enclosu

6、re around an electromagnet The Fill feature create a new frozen body to fill the space occupied by a hole or cavity.Useful for interior cavity electromagnetic applications.Fill FeatureEnclosure SymmetryFeature:The Enclosure feature now supports symmetry models when the enclosure shape is a box or a

7、cylinder:Up to 3 three symmetry planes can be specified.Full or partial models can be included in the Enclosure.During the model transfer from DesignModeler to Simulation,the enclosure feature with symmetry planes forms two kinds of named selections:Open Domain Symmetry PlaneContentsWorkbench Electr

8、omagnetics Workbench Emag RoadmapDesign Modeler Enclosure Symmetry Winding bodies Winding ToolSimulationWinding Bodies&Tool Feature:Design Modeler(DM)includes two new tools to allow a user to easily create current carrying coils:Winding Bodies:Used to represent wound coils for source excitation.The

9、advantage of these bodies is that they are not 3D CAD objects,and hence simplify modeling/meshing of winding structures.Upon“attach to Simulation”,Winding Bodies are assigned as Conductor bodies.Winding Tool:Used to create more complex coils for motor windings.The Winding Tool uses a Worksheet table

10、 format to drive the creation of multiply connected Winding Bodies.Or a user can read in a text file created by MSExcel.Benefits:Very easy to use,rapid creation of coil windings.Winding BodiesA line body can be promoted to a winding body.Turns and cross-section(CS)dimensions are enteredWinding cross

11、-section displayedTangent orientation vector(blue arrow)defines direction of current.Winding ToolComplex coil windings may be created using the Winding Tool:The Winding Tool inserts a“Winding#”into the model tree.A“Details”view is used for geometric placement.Winding ToolEach Winding consists a numb

12、er of related Winding Bodies.The related Winding Bodies are shown in the Parts/Bodies branch:Winding BodiesWinding Table File Each Winding has a Winding Table File associated with it.The Winding Table File can be created directly in DM The Winding Table File can be exported to or imported from a tex

13、t file.Each row corresponds to a created Winding Body Winding Table File The Winding Table File can be exported to or imported from a text file.Winding Tool Example Winding 1 highlighted with rotor Complete DC Motor modelWinding Options Coils may have different radii between IN&OUT slots Multiple co

14、ils may be stacked in the same slotWinding Options-Skew A skew angle may be identified for the coil winding slots Many motor designs employ a skewed coil form.Winding Slot Clash DetectionWinding Tool automatically detects if the coil clashed with another part and warns the userContentsWorkbench Elec

15、tromagnetics Workbench Emag Roadmap Design Modeler Enclosure Symmetry Winding bodies Winding Tool Simulation Tools Layout Winding bodies Material Properties Air Gap Mesh Sizing Conductors SolutionSimulation Tools LayoutElectromagnetic ToolbarSimulation Environment:Emag boundary conditionsConductor s

16、ource excitationSolution ResultsVoltageCurrent DensityFieldForceTorqueInductance Flux linkageEmag Simulation Wizard Interactively walks a user through required analysis steps.Winding Body Transfer in SimulationWinding bodies are automatically assigned to conductor bodies.From the Winding Tool,each P

17、hase Winding is assigned as a unique conductor.In this example,Conductor A consists of 2 winding bodies.Material Property SupportBoth linear&nonlinear Emag materials are supported by Engineering Data:Soft materials(Steel,iron,etc.)Constant(isotropic)Laminated(orthotropic)Linear/nonlinear(single B-H

18、curve)Hard materials(NdFeB,SmCo,Alnico)Linear Nonlinear Library of 35 BH curves provided 35 common materialsMaterials BH Curve Library Materials User BH Curves BH curves with up to 500 data points are supportedMaterials-Permanent MagnetsCoordinate systems are used to align the polarization axis of a

19、 magnet.Cartesian and Radial Magnetization are supported.Air Gap Mesh Sizing Requirement:.In an electromagnetics analysis models typically include narrow gaps between parts such as rotors and stators.It is important to have a refined mesh in these gaps.Feature:Air Gap Mesh sizing.As for other mesh c

20、ontrols,air gaps are assigned under Advanced Controls in the Mesh Detail.Benefits:Easy to use mesh refinement,resulting in more accurate analysis results.Air Gap Mesh SizingConductor Objects identify conductors for excitation,inductance,and Post processing.Can be scoped to solid bodies(solid conduct

21、ors),or Winding Bodies(wound coils)Excitation:Supports voltage and current loading for solid conductors.Current and phase angle are supported for Winding Bodies.Conductor ObjectsSolution ResultsVector&Contour PlotsVector/Contour is selected in the Solution objects“Definition”or Results toolbarVector

22、 PlotsVector plot arrow scale,2D/3D arrows and arrow density can be defined allowing excellent visualization of the electromagnetic fieldInductance&Flux LinkageSolution branch can insert Inductance&Flux linkage post processing calculations.Self and mutual inductance is computed.Parameter SweepsThe Emag analysis can be fully parameterized so that a user can easily extract force or torque versus rotor position etc.Parameter SweepsGraph of results automatically created.END