ANSYS Workbench 9.0电磁学教程实例

1、ANSYS Workbench 9.0 Electromagnetics Paul Lethbridge,Contents,Workbench Electromagnetics Workbench Emag Roadmap Design Modeler Enclosure Symmetry Winding Bodies Winding Tool Simulation,Workbench Emag Roadmap,LF Emag capability will be exposed over several release cycles: 3D Magnetostatics (9.0) 3D C

2、urrent conduction (10.0) 3D Electrostatics Circuit elements Time transient & 2D Workbench 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 simula

3、tions to compute results 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 Rotat

4、ing Electric machines Synchronous machines DC machines Permanent magnet machines,Contents,Workbench Electromagnetics Workbench Emag Roadmap Design Modeler Enclosure Symmetry Winding bodies Winding Tool Simulation,Enclosure & Fill Tools,Design Modeler (DM) includes two features to allow a user to cre

5、ate a volumetric “field” body associated with 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 i

6、nterior cavities.,Example of a hemispherical enclosure 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 Feature,Enclosure Symmetry,Feature: The Enclosure feature now support

7、s symmetry models when the enclosure shape is a box or a 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

8、selections: Open Domain Symmetry Plane,Contents,Workbench Electromagnetics Workbench Emag Roadmap Design Modeler Enclosure Symmetry Winding bodies Winding Tool Simulation,Winding Bodies & Tool,Feature: Design Modeler (DM) includes two new tools to allow a user to easily create current carrying coils

9、: Winding Bodies: Used to represent wound coils for source excitation. The 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 cre

10、ate more complex coils for motor windings. The Winding Tool uses a Worksheet table 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 Bodies,A line body can be p

11、romoted to a winding body. Turns and cross-section (CS) dimensions are entered,Winding cross-section displayed,Tangent orientation vector (blue arrow) defines direction of current.,Winding Tool,Complex coil windings may be created using the Winding Tool: The Winding Tool inserts a “Winding#” into th

12、e model tree. A “Details” view is used for geometric placement.,Winding Tool,Each Winding consists a number of related Winding Bodies. The related Winding Bodies are shown in the Parts/Bodies branch:,Winding Bodies,Winding Table File,Each Winding has a Winding Table File associated with it. The Wind

13、ing Table File can be created directly in DM The Winding Table File can be exported to or imported from a text 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 wi

14、th rotor,Complete DC Motor model,Winding Options,Coils may have different radii between IN & OUT slots Multiple coils may be stacked in the same slot,Winding Options - Skew,A skew angle may be identified for the coil winding slots Many motor designs employ a skewed coil form.,Winding Slot Clash Dete

15、ction,Winding Tool automatically detects if the coil clashed with another part and warns the user,Contents,Workbench Electromagnetics Workbench Emag Roadmap Design Modeler Enclosure Symmetry Winding bodies Winding Tool Simulation Tools Layout Winding bodies Material Properties Air Gap Mesh Sizing Co

16、nductors Solution,Simulation Tools Layout,Electromagnetic Toolbar,Simulation Environment: Emag boundary conditions Conductor source excitation,Solution Results Voltage Current Density Field Force Torque Inductance Flux linkage,Emag Simulation Wizard,Interactively walks a user through required analys

17、is steps.,Winding Body Transfer in Simulation,Winding bodies are automatically assigned to conductor bodies. From the Winding Tool, each Phase Winding is assigned as a unique conductor. In this example, Conductor A consists of 2 winding bodies.,Material Property Support,Both linear & nonlinear Emag

18、materials are supported by Engineering Data: Soft materials (Steel, iron, etc.) Constant (isotropic) Laminated (orthotropic) Linear/nonlinear (single B-H curve) Hard materials (NdFeB, SmCo, Alnico) Linear Nonlinear Library of 35 BH curves provided 35 common materials,Materials BH Curve Library,Mater

19、ials User BH Curves,BH curves with up to 500 data points are supported,Materials - Permanent Magnets,Coordinate systems are used to align the polarization axis of a magnet. Cartesian and Radial Magnetization are supported.,Air Gap Mesh Sizing,Requirement: . In an electromagnetics analysis models typ

20、ically 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 controls, 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 Sizing,Conductor Objects identify conductors for excitation, inductance, and Post processing. Can be scoped to solid bodies (solid conductors), or Winding Bodies (wound coils),Excitation: Supports voltage and current loading for solid conductors