e02 example - losses recalculation_v2017

1、Example 02:Winding Loss RecalculationPExprt User GuidePExprt v2017 (R18) User Guide1 2016 ANSYS, Inc.October 21, 2018Open PExprt ApplicationPExprt v2017 (R18) User Guide2 2016 ANSYS, Inc.October 21, 2018This flyback transformer example will illustrate several of the different methods for calculating

2、 winding losses: Equations only 1D Analytical model 2D FEA modelSelect File - New for a New ProjectPExprt v2017 (R18) User Guide3 2016 ANSYS, Inc.October 21, 2018Select “Flyback Converter” component from the list of components and click on “OK” buttonSelect Ferroxcube Library for DesignPExprt v2017

3、(R18) User Guide4 2016 ANSYS, Inc.October 21, 2018Drag the Ferroxcube library from the “Stock Library” and drop it on the “Design Library” to assign itDefine the Required Converter ParametersPExprt v2017 (R18) User Guide5 2016 ANSYS, Inc.October 21, 2018Select the Design Inputs tab, choose a 1D “Com

4、pletely- Full” Winding SetupIn this example all default values will be used for: Waveforms Modeling OptionsStart the design processPExprt v2017 (R18) User Guide6 2016 ANSYS, Inc.October 21, 2018Use “Calculations/Start DesignProcess” or click on the button at the toolbarAllow PExprt Selection of the

5、Core, Wires and MaterialsPExprt v2017 (R18) User Guide7 2016 ANSYS, Inc.October 21, 2018Click on “Yes” buttonThe user can individually select which cores, wires, and core materials are to be consideredHowever in this example, we let PExprt select the appropriate options based on the designDesigning

6、the ComponentPExprt v2017 (R18) User Guide8 2016 ANSYS, Inc.October 21, 2018Save the project after the design process is complete using File/ SaveExamine the Equation Based ResultsPExprt v2017 (R18) User Guide9 2016 ANSYS, Inc.October 21, 2018 The list of results below displays the 10 best designs s

7、orted from lowest to highest power loss Resort on another column by clicking on heading at top, such as gap or volume Resort back based on power loss (lowest to highest) These results are based on equations only - no model has been createdAdd ID # for each designPExprt v2017 (R18) User Guide10 2016

8、ANSYS, Inc.October 21, 20181D topology: both 1D analytical and 2D FEA models can be created for this designSelect the first design (ID #940) which has the lowest lossesDouble click on the list to bring up the “Customize List of Results” window. Then check the “ID #” box and select OK. An addition co

9、lumn appears on the right side to give each design a numberView the construction details of designPExprt v2017 (R18) User Guide11 2016 ANSYS, Inc.October 21, 2018bobbin(blue)conductors (yellow and red)Right half of core Click on the Construction Results tab to see the proposed design parameters and

10、cross-sectional view Double click on core size, bobbin, core material, or wire for more informationView the Performance Results of this DesignPExprt v2017 (R18) User Guide12 2016 ANSYS, Inc.October 21, 2018 Click on the Performance Results tab to see the losses, leakage inductance, winding performan

11、ce, core flux density, permeability, and temperature Double click on core, windings, losses, or max temperature for more information Select the “List of Results” tab and select the top design (lowest losses)Generating Analytical Model of the DesignPExprt v2017 (R18) User Guide13 2016 ANSYS, Inc.Octo

12、ber 21, 2018Click on “OK” to generate the model for design design #940Select “Analytical Model”Use “Modeler/Generate Model” menu or click on the button at the toolbarGenerating another Analytical modelPExprt v2017 (R18) User Guide14 2016 ANSYS, Inc.October 21, 2018Select the design with an RM10/1 co

13、re” (ID #1144) from the listGenerating another Analytical modelPExprt v2017 (R18) User Guide15 2016 ANSYS, Inc.October 21, 2018Click on “OK” to generate the model for design design #1144Select “Analytical Model”Use “Modeler/Generate Model” menu or click on the button at the toolbarRecalculating Wind

14、ing LossesPExprt v2017 (R18) User Guide16 2016 ANSYS, Inc.October 21, 2018Select the top option to recalculate the winding losses based on the 1D models just createdSelect all desired designs and Use “Calculations/Recalculate Winding Losses” menuExplore the ResultsPExprt v2017 (R18) User Guide17 201

15、6 ANSYS, Inc.October 21, 2018 Losses are more accurately recalculated using the generated analytical models The icon is modified in order to indicate that the winding losses have been recalculated using the 1D model The list of results information is automatically updated Note that the losses are co

16、nsiderably higher than the initial calculationGenerating an FEA Based Model of a Single DesignPExprt v2017 (R18) User Guide18 2016 ANSYS, Inc.October 21, 2018Select the first design in the listGenerating an FEA Based Model of a Single DesignPExprt v2017 (R18) User Guide19 2016 ANSYS, Inc.October 21,

17、 2018Click on “OK”Click on “OK”Select “FEA 2D based Model without capacitive effects”Use “Modeler/Generate Model” menu or click on the button at the toolbarGenerating an FEA Based Model of a Single DesignPExprt v2017 (R18) User Guide20 2016 ANSYS, Inc.October 21, 2018Exit the FEA Modeler window to g

18、et back to PExprtClick on “Exit” when doneThe model will take a few minutes to be generatedClick on “Start”Recalculating winding lossesPExprt v2017 (R18) User Guide21 2016 ANSYS, Inc.October 21, 2018Select the top option to recalculate the winding losses based on the 2D models just createdSelect desired designs and Use “Ca