Electrical Machines and Applications
A tantárgy neve magyarul / Name of the subject in Hungarian: Villamos gépek és alkalmazások
Last updated: 2021. március 17.
BSc Electrical Engineering
Sustainable Power Engineering Specialisation
Dr.Károly Veszprémi Professor, Department of Electric Power Engineering
A fenti forma a Neptun sajátja, ezen technikai okokból nem változtattunk.
A kötelező előtanulmányi rend az adott szak honlapján és képzési programjában található.
To teach those knowledge in the field of electrical machines and drives, which are necessary in the Electrical Energetics specialisation. Presents the practical calculation methods, the operation of the electrical machines systems. Describes the usual, modern and prospective applications.
Transformers
Single-phase and 3-phase transformers. Steady-state and transient operation. Unbalanced load of the 3-phase transformers. Special transformers.
Windings of the rotation machines, torque development
Concentrated and distributed winding (slots). The induced voltage, the developed air-gap filed, the stray field. Force and torque development and calculation.
Induction machines
Equivalent circuit and torque development. Deep-slot and double-slot rotors. Effect of the spatial harmonics. Starting and speed modification methods. Asymmetric operation, stator and rotor asymmetry. Single-phase and auxiliary-phase machines.
Synchronous machines
Cylindrical rotor case: Equivalent circuit and torque development. Motor and generator operation. Stability. Effect of the salient-pole. Reluctance machines. Permanent-magnet machines. Synchronous and induction linear machines.
DC machines
Armature windings. The role of the auxiliary and compensating windings. Separate, parallel and mixed excitation, characteristics. Starting and speed modification.
Modern calculation methods
Finite element method (FEM). Poisson equation. Lagrange interpolation polynom. Dirichlet and Neumann conditions. Simple 2D promlem. Presentation of the QuickField, Flux2D and Motorpro, MotorCad software.
Applications of electrical machines
Household electrical machines. Electrical machines in consumer electronics. Electrical machines in vehicles. Magnetically levitated trains. Superconducting generators and motors. Servo motors.
Kinetics of electrical drives
Reduction of torques and masses to common shaft. Motion equation of the electrical drives. Stability criterion of drives. Definition of time constants.
Design of electrical drive
Protection levels. Operation condition of electrical motors. Thermal conditions. Selection of electrical motors.
Applications of electrical drives
Speed modification and braking methods of DC urban electrical vehicles. Voltage source inverter-fed induction machine driven trolley-bus. Semiconductor-based DC drive driven trains. Inverter-fed trains. Wind generators.
The practices:
· Calculation of electromagnetic forces
· Single-phase transformers
· Parallel operation of transformers
· Connections of transformers
· 3-phase transformers
· AC windings
· Calculation of the induced voltage
· Steady-state operation of induction machines
· Starting of induction machines
· Steady-state operation of synchronous machines
During the semester: passing one midterm test
In the exam period: written exam with possible oral exam improvement
Lecture notes from the webpage of the department.
Contact hours
42
Preparation for contact hours
14
Preparation for the midterm
15
Learning at home
Preparation for the practices
10
Homework assignments
0
Preparation for the exam
39
Total workload
120
Dr.István Vajda Professor, Department of Electric Power Engineering