CAD Package for Electromagnetic and Thermal Analysis using Finite Elements FLUX 10 ® 2D Application Tutorial of translating motion Copyright – Juillet 2009 FLUX is registered mark FLUX software FLUX2D tutorials : COPYRIGHT CEDRAT/INPG/CNRS/EDF : COPYRIGHT CEDRAT This tutorial was updated on July 2009 Ref.: K205-A-10-EN-07/09 CEDRAT 15 Chemin de Malacher - Zirst 38246 MEYLAN Cedex FRANCE Phone: +33 (0)4 76 90 50 45 Fax: +33 (0)4 56 38 08 30 Email: cedrat@cedrat.com Web: http://www.cedrat.com CONVENTIONS USED To make this tutorial easier to read, we use the following typeface conventions: • All comments are written in the same way as this sentence • All dialog text between the user and FLUX2D is written in courier font: Name of the region to be created: magnet ↵ Colour of this region: AGENTA Select a surface or a menu item: uit [q]uit ↵ Below are presented the conventions used for the dialog between the user and FLUX2D: Italic text Bold text ↵ magnet ↵ [q]uit ↵ old text AGENTA Messages or questions displayed on the screen by FLUX2D User input to FLUX2D, such as the coordinates of a point The ↵ character symbolizes the Return/Enter key You only have to enter enough of the response to remove any ambiguity between the response you want and other valid ones In which case enter the character shown in square brackets [ ] FLUX2D menu input Make a selection by clicking on the menu item with the mouse or, if there is no ambiguity, by entering the first character of the word (shown in angled brackets < >) FLUX2D graphical input, such as selecting a line or a point ↵ The reply is by default To enter a default response, simply press the Return/Enter key - REMARK The files corresponding to different cases studied in this tutorial are available in the folder: \DocExamples10.3\Examples2D\TranslatingMotion The correspondent applications are ready to be solved This allows you to adapt this tutorial to your needs • If you are not familiar with FLUX2D yet, we advise you to run through this entire tutorial and to refer, if necessary to the given cases • If you are already a FLUX2D user, we advise you to redo only the PREFLUX 2D, SOLVER_2D and POSTPRO_2D sections, in order to discover the new possibilities of FLUX2D FLUX2D®10 TABLE OF CONTENTS TABLE OF CONTENTS REALIZED STUDY GEOMETRY 2.1 Regions 2.2 Mesh 2.3 Materials 11 2.4 Sources 12 2.5 Boundary conditions 12 PREFLUX 2D: ENTERING THE GEOMETRY, THE MESH AND THE PHYSIC 15 3.1 Starting FLUX2D 15 3.2 Starting PREFLUX 2D 18 3.3 Entering the geometry 21 3.4 Activating the Geometry command 22 3.5 Create geometric tools .24 3.6 Create the fixed part of the magnetic core 30 3.7 Create the moveable part of the magnetic core 43 3.8 Create translating airgap and displacement regions 47 3.9 Create the domain 53 3.10 Building the mesh .58 3.11 Construct the mesh 79 3.12 Creating the regions and assign physical properties 84 3.13 Creating the TRA file 116 3.14 Saving data and leaving PREFLUX 2D 117 SOLVER_2D: SOLVE THE PROBLEM 119 4.1 Choosing the problem 119 4.2 Define a parameter 120 4.3 Activate the parameterization tools 120 TUTORIAL OF TRANSLATING MOTION PAGE A TABLE OF CONTENTS FLUX2D®10 4.4 Parameterize the CORE position 121 4.5 Run the solver 126 POSTPRO_2D: ANALYZE THE RESULTS .127 5.1 Starting POSTPRO_2D 127 5.2 Choosing the problem 127 5.3 Display the results 129 5.4 Visualize the color-shaded plot of flux density 131 5.5 Curves and vectors of the magnetic flux density 133 5.6 Compute local and global quantities 142 5.7 Leave POSTPRO_2D 148 ELECTRIFLUX: CONSTRUCT THE SUPPLY CIRCUIT 151 6.1 About ELECTRIFLUX 151 6.2 Start ELECTRIFLUX 152 6.3 Create a new circuit 152 6.4 Name the circuit 153 6.5 Construct the electric circuit 153 6.6 About the ELECTRIFLUX graphic display 158 6.7 Leave ELECTRIFLUX 160 PREFLUX 2D: PHYSICAL PROPERTIES FOR TRANSIENT MAGNETIC 161 7.1 Start PREFLUX 2D 161 7.2 Creating the TRA file 176 7.3 Saving data and leaving PREFLUX 2D 177 PREPARE THE SOLVING PROCESS 178 SOLVER_2D: SOLVE THE PROBLEM 182 9.1 Choosing the problem 182 9.2 Define a parameter 184 9.3 Run the solver 192 10 POSTPRO_2D: ANALYZE THE RESULTS .196 PAGE B 10.1 Starting POSTPRO_2D 196 10.2 Choosing the problem 197 10.3 Time variation of the current in the coil 198 10.4 Time variation of the mechanical quantities 203 10.5 Time variation of the magnetic flux and of the inductance of the coil 211 10.6 Leave POSTPRO_2D 216 TUTORIAL OF TRANSLATING MOTION FLUX2D®10 PART A: DESCRIPTION OF THE STUDY PART A: DESCRIPTION OF THE STUDY TUTORIAL OF TRANSLATING MOTION PAGE PART A: DESCRIPTION OF THE STUDY PAGE FLUX2D®10 TUTORIAL OF TRANSLATING MOTION FLUX2D®10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS Perform tasks to presented in the figure below Click on Add All Click on Display tab Click on Superimposed Click on User Enter Click on Unit with exponent Click on OK PAGE202 Tutorial of Translating Motion FLUX2D ® 10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS The figure below will be displayed 10.4 Time variation of the mechanical quantities In this section we shall display the curves of time variation of the force, position, and velocity of the CORE region First, we will display the variation of the force in the CORE region for the spring coefficient value equal with N/m To create the curve, click on , or on the menus: Computation 2D Curves manager Tutorial of Translating MotionPAGE 203 FLUX2D®10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS and then, follow the tasks in the figure below Enter Force as Name Select Parameter Select parameter Time Select Mechanics as Quantity Select Force as Components Click on Create Now, we will create the curve of time variation of the CORE position along the OY axis, in two cases exactly as in current variation case First, we will create the Position_1 curve, which corresponds to the spring constant value equal to N/m, and then we will create the second curve, Position_2 that corresponds to a value of 10000 N/m In this case the parameters are set to reference To create the first curve, follow the tasks in the figure below Enter Position_1 as Name Select Parameter Select parameter Time Select Mechanics as Quantity Select Position as Components Click on Create PAGE204 Tutorial of Translating Motion FLUX2D ® 10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS To create the second curve, first click on the Set parameters bar from the 2D curves manager window and perform the tasks presented in the figure below Click on Animation >> Select S_constant(TAG) as Parameters Select 10000 as Starting value After you close this window and return to the 2D curves manager window, you have to perform the tasks presented in the next figure Enter Position_2 as Name Select parameter Time Click on Create In order to create the curve of time variation of the core velocity along the OY axis for the value N/m of spring constant, first we have to set the parameter spring to the reference value by clicking on the Set parameters bar from the 2D curves manager window and then following the task presented in the figure below Tutorial of Translating MotionPAGE 205 FLUX2D®10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS Click on Set all to ref To create the Velocity curve, follow the tasks presented in the figure below Enter Velocity as Name Select parameter Time Select Velocity as Components Click on Create Click on Close To display the curve of force and position for the spring constant equal to 0, we should open the 2D Curves window by clicking on the menus: Window New 2D curves sheet Then, we should modify the properties of this window by clicking on the menus: 2D Curves Properties PAGE206 Tutorial of Translating Motion FLUX2D ® 10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS We should perform tasks to presented in the figure below Select C omputation as Curves filter Click on Force Click on Position_1 Click on A dd Click on O K The curves in the figure below will be displayed Tutorial of Translating MotionPAGE 207 FLUX2D®10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS Thanks to the pick option, it is possible to determine graphically the force in the initial position of the core, as well as the force at the final position (at contact), using the menu: 2D Curves New cursor and moving the vertical cursor using the mouse The following figure will be displayed In the initial position the force is N and at the contact is approximately –75.76 N To display the curves of velocity and position for a spring constant equal to 0, open the 2D Curves window by clicking on the menus: Window New 2D curves sheet Then, modify the properties of this window by clicking on the menus: 2D Curves Properties Perform tasks to presented in the figure below Select C omputation as Curves filter Click on Position_1 Click on V elocity Click on A dd Click on O K PAGE208 Tutorial of Translating Motion FLUX2D ® 10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS The curves in the figure below will be displayed For a better visualization of the influence of the spring upon the position, we will superimpose the two curves that we have created, Position_1 and Position_2 To display the curves open the 2D Curves window by clicking on the menus: Window New 2D curves sheet Then, modify the properties of this window by clicking on the menus: 2D Curves Properties Tutorial of Translating MotionPAGE 209 FLUX2D®10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS Perform tasks to presented in the figure below Click on Position_1 Click on Position_2 Click on Add Click on Display bar Click on Superimposed Click on OK PAGE210 Tutorial of Translating Motion FLUX2D ® 10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS The curves in the figure below will be displayed 10.5 Time variation of the magnetic flux and of the inductance of the coil To create the curve of the time variation of the magnetic flux in the coil, click on menus: , or on the Computation 2D Curves manager Tutorial of Translating MotionPAGE 211 FLUX2D®10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS and then, follow the tasks in the figure below Enter Flux as Name Select Parameter Select parameter Time Select Inductance as Quantity Select Flux seen by re… as Components Select the COIL as Support Click on Create To create the curve of time variation of the magnetic flux in the coil, follow the tasks in the figure presented below Enter Inductance as Name Select Parameter Select parameter Time Select Inductance as Quantity Select Inductance as Components Select the COIL as Support Click on Create Click on Close PAGE212 Tutorial of Translating Motion FLUX2D ® 10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS To display the Flux curve you should open the 2D Curves window by clicking on the menus: Window New 2D curves sheet Then, we should modify the properties of this window by clicking on the menus: 2D Curves Properties Perform tasks to presented in the figure below Click on Flux Click on Add Click on Display Click on User Enter Click on OK Tutorial of Translating MotionPAGE 213 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS FLUX2D®10 The curve will be displayed as in the figure below Check that the variation of the magnetic flux increases at the end of the core motion, which leads to a decrease in the current PAGE214 Tutorial of Translating Motion FLUX2D ® 10 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS To display the Inductance curve that we created you should perform the tasks to presented in the following figure Click on Inductance Click on Add Click on Display Click on User Enter Click on OK The curve will be displayed as in the figure below The perturbations on the variation of the inductance are due to the induced currents The steady state value of the inductance is practically the same computed in Case Tutorial of Translating MotionPAGE 215 PART C: EXPLANATION OF CASE POSTPRO_2D: ANALYZE THE RESULTS 10.6 FLUX2D®10 Leave POSTPRO_2D To quit the post-processor you should click on the menus: File Exit You have the possibility to save for a later analysis the computation supports and the curves that you have just defined Yes PAGE216 Tutorial of Translating Motion