1 Lecture Computer aided design for electrical engineering

1. Lecture Computer aided design for electrical engineering Computer Aided Design/ Computer Aided Engineering CAD/CAE Ing. Miroslav Novák, Ph. D. The Institute of Mechatronics and Computer Engineering Faculty of Mechatronics, Informatics and Interdisciplinary Studies Technical University of Liberec ( +420 48 535 3626 e-* miroslav. novak@tul. cz ESY

2 Contents n n What CAD and CAE is? Where it can help? Products introduction and presentation of outputs CAM, ERP

3 System design 1. 2. 3. 4. 5. Preparation, literature search Analysis, computation Design Presentation Manufacturing preparation

4 CAD – Computer Aided Design n Usually mechanical part design 2 D, 3 D Electrical engineering: drawings of wiring and its administration Electronics: PCB design, IC design Prosperities: n Interactive drawing/modeling n Automatic generation of standard components, libraries of parts and material n Design verification n Behavior simulation n Outputs in form of drawing documentation and another documents such as bill of material etc. n Visualization

5 CAE – Computer Aided Engineering n n It is general mathematical SW CAE supports analysis, simulation, design, manufacturing, planning, diagnostics and corrections CAE provides faster design, optimalization CAE is often modular system, supports different parts of design, sometimes integrated into CAD: n n n FEM – Finite element method CFD – Computational fluid dynamics Kinematics Calculations of load-carrying capacity of leads Protection selectivity …

6 CAD/CAE in electrical engineering n n Schematics has to be designed by ourselves Management of large projects and its revision Significant help at accompanying documentation – bill of material, length of cables for cutting or production documentation of cable harnesses, mounting instructions of terminal blocks including labels, … CAE some product makes basic check-up (short circuits) => Increasing of design productivity and assembly productivity – database engine minimize data entry, limits number of errors, link to ERP (assortment)

7 ELCAD, RUPLAN, SPAC, e. PLAN, Sichr Database engine, project management, wiring editor Modules: http: //www. elcadsw. cz Symbols –symbol management, creation Translation – complete documentation into other language Revision – multiple revisions performed by different users, management of revisions PLC – automatic I/O list generation for PLC programs Terminal block – list of connections, list of terminals, printing of labels Cabling – path of conductor, manufacturing documentation Switchboard – placement of parts Wiring – interconnections of switchboard, path and length generating of wires Users: Siemens, ABB, Schenk, Braun, Steag, VA TECH, RWE

8 ELCAD, RUPLAN, SPAC, e. PLAN, Sichr Database engine, project management, wiring editor Modules: http: //www. ruplan. cz Symbols –symbol management, creation, database of symbols Translation – complete documentation into other language Revision – multiple revisions performed by different users, management of revisions PLC – automatic I/O list generation for PLC programs Terminal block – list of connections, list of terminals, printing of labels Adapted to power engineering - Cable harness design, rail vehicles Users: EUV (distribution points), Mercedes Benz, Bombardier (rails), MAN (lorries)

9 ELCAD, RUPLAN, SPAC, e. PLAN, Sichr Instrument for building installations http: //www. spac. cz Modules: Site layout of building – rooms + furniture Wires patch in 3 D Databases of standard devices and cables Cooperation with CONEC modules – computation of wire cross-sections, protection selectivity, power consumption balance, power factor compensation

10 ELCAD, RUPLAN, SPAC, e. PLAN, Sichr http: //www. eplan. cz Database engine, project management, wiring editor In addition: Support of PLC systems Design of hydraulic and pneumatic systems (module FLUID) General drawings

11 ELCAD, RUPLAN, SPAC, e. PLAN, Sichr http: //www. oez. cz Support for protection design and cable design Verification of protection selectivity Verification of loop impedance for save switch off during short circuits Verification of nominal currents, cables warming, breaking capacity

12 Common attributes n n n Database engine – quality depends on volume, niceness and up to date of database Basic part is wiring editor – reports and manufacturing documentation are generated from schematics Modular solution – computational support of some design tasks

13 Project management n n n Keeps consistency Versions management Database is supplied from device manufacturers or CAE designers

14 Schematics editor • Parts in database • interconnections

15 Terminal block arrangement • Different types of outputs, including graphics • Editable in schematics or in terminal block description

16 Cables • Different types of outputs (drawings, lists) • Manufacturing data generated automatically • Calculate necessary length of cables

17 Summary n n n Development procedure shorten significantly Management of complex projects – support of multi user design Standardization of project documentation Errors elimination Lint to CAM, ERP systems

18 What is CAM? - Computer aided manufacturing Automatic creation of CNC programs according to CAD/CAE data Functions of CAM: • Data verification • Modifications due to material specificity (e. g. casting addition ) • Editable manufacturing process • Addition of production data n n Input is usually CAD 3 D model. Then the tool-path is computed, usually in format CL (Cutter Location data). This data are transferred to postprocessor, where they are transformed into NC code N 1 X 0 Y 0 T 01 N 2 X 0 Y 2000 N 3 X 4000 Y 2000 N 4 X 4000 Y 0 N 5 X 0 Y 0 N 6 M 00 Electrical engineering CAE partial support – header files with outlet definitions for PLC automats Programs for cable cutting automats

19 ERP - Enterprise Resource Planning n Systems for company controlling – covers production planning, logistics, accounting, personal management including wages, management of relations between consumers, partners and suppliers, stocks, maintaining… Most known products: n n SAP Oracle Microsoft Navision n Another products with comparison, see: http: //techupdate. zdnet. com/techupdate/stories/main/0, 14179, 2844334, 00. html

20 Next time n n Requirements on energy distribution (power current circuits, weak-current circuits) Types of power current circuits