410-4205/01 – Numerical Methods for Designing Electrical Machines and Apparatuses (NMSP)
| Gurantor department | Department of Electrical Power Engineering | Credits | 8 |
| Subject guarantor | doc. Ing. Petr Kačor, Ph.D. | Subject version guarantor | doc. Ing. Petr Kačor, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Choice-compulsory |
| Year | 2 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2010/2011 | Year of cancellation | 2020/2021 |
| Intended for the faculties | FEI | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
Students use numerical method (FEM, etc.) for designing of electrical machines and devices by the help of suitable softwares (CAD, SOLIDWORKS, ANSYS, etc.)
Teaching methods
Lectures
Tutorials
Project work
Other activities
Summary
Purpose of the study subject is centered towards new calculation methods and
methodology of the project at the power current electrotechnics specialized to
the electric machines and devices. On the particular examples are the students
apprised of creation of physical model, of entering important material
properties and specific boundary conditions, of solution, of processing of
caltulated data and their interpretation for a practical assimilation. These
calculations are realized through the Method of Finite Elements (FEM ) aided
by software equipment ANSYS.
Compulsory literature:
Mason, J.R.: Switch engineering handbook, New York, 1993
ANSYS Manual
Cassie, A.M: Introduction to the theory of circuit interruption, in: Trencham. H.: Circuit breaking, London, McGraw-Hill 1953
Gerszonowicz, H.: High-Voltage A.C. Circuit-Breakers.London,McGraw-Hill 1953
Greenwood,A.: Electrical transient in power systems.New York, Sydney, Toronto, Wiley Interscience, 1971.
Holm, R.: Electric Contacts Handbook. Berlin, Springer-Verlag 1958, 1967.
Jahn, R.G.:Physics of electric propulsion, New York McGraw-Hill 1968.
Batiwala, F. et al: Comparsion of arc extinguishing systems, inductive currents. Helsinki 1981.
Blower, R.W. et al: Vacuum circuit-breaker for distribution voltages. In: Symp. on h.v. switching equipment. Sydney 1979.
Recommended literature:
Way of continuous check of knowledge in the course of semester
Conditions for credit:
Student has to work out the individual project and final test. To pass the laboratory part the student must to get at least 25points (40points max) from the laboratory excercises.
E-learning
Other requirements
There are no other requirements on the student.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Lectures:
Describtion, basic structure of CAD and FEM software, model, material constants, loadings, post-processing.
2D and 3D electric field excercises, boundary conditions, loading, solution, post-processing.
2D and 3D magnetic field excercises, boundary conditions, loading, solution, post-processing.
2D and 3D electromagnetic field excercises, boundary conditions, loading, solution, post-processing.
2D and 3D thermal field excercises, boundary conditions, loading, solution, post-processing.
Introduction to structural field solution, deformation, displacement, deflection, mechanical torque etc.
2D and 3D coupled-field simulation (electro-magnetic-thermal-structural).
Solution methods, direct and indirect method, element types, material constants.
Solution of CFD excercises, cooling, thermal fluid, liquids, gases
Projects:
Student has to make individual projects by the help of FEM.
FEM simulation of force acting on two parallel conductors
FEM simulation of AC current flowing
FEM simulation of static force characteristic of DC electromagnet
Computer labs:
Requirements for passing of laboratory excercises, semestral project,
Starting of software, utility menu, setting, memory management, import and export files, GUI.
Preprocessor - 2D and 3D model building, element types,material properties, macro.
2D and 3D model of plate capacitor, computing of capacitance, high-voltage insulator (electric field intensity, dielectric strength).
2D and 3D model of manetic circuit with permanent magnet (magnetic circuit with BH curve, solution of force effect).
2D model of coil (computing of inductance of air-coils and solenoids with magnetic core).
2D model 3ph bus-bars (force effect in short-circuit condition, skin-effect, distribution of magnetic field at 3ph circuit).
2D model of DC solenoid magnet (static force characteristic, influence of BH characteristic on final force).
2D model of transforer (warming of winding).
2D model of 1ph transformer, solution of magnetic field, warming of winding at nominal loading.
3D model of thermal release of circuit breaker (warming at over-current condition, force effect made by thermal deformation).
3D model of motor shaft (material properties, loading).
2D CFD model of transformer (natural and force cooling, influence of cooling ribs).
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction