453-0506/02 – Electrical Machines (ES)
Gurantor department | Department of Electrical Machines and Apparatus | Credits | 6 |
Subject guarantor | Ing. Václav Čech, Ph.D. | Subject version guarantor | Ing. Václav Čech, Ph.D. |
Study level | undergraduate or graduate | Requirement | Compulsory |
Year | 3 | Semester | winter |
| | Study language | Czech |
Year of introduction | 2007/2008 | Year of cancellation | 2009/2010 |
Intended for the faculties | FEI | Intended for study types | Bachelor |
Subject aims expressed by acquired skills and competences
The course objectives is to master theory of transformers and asynchronous machines, their properties and utilization. Then to master basic measurements of operation characteristics of machines.
Teaching methods
Lectures
Tutorials
Experimental work in labs
Other activities
Summary
In the course students become familiar with dividing ot electric machines, with electrical materials and basic laws for electric machines. Basic principles of transformers and asynchronous machines and their operation characteristics are discussed. Students become familiar also with basic rules of winding. During laboratory excercises the operation states of electric machines are measured.
Compulsory literature:
Hindmarsh,J.: Electrical Machines and their Applications, Oxford,1970
Recommended literature:
Keppert, S., Čermák, T.: Transformátory, skriptum VŠB Ostrava, 1984
Keppert, S.: Asynchronní stroje, skriptum VŠB Ostrava, 1984
Petrov,G.N.: El. stroje 1 a 2, ACADEMIA 1980
Bašta J. a kol.: Teorie el. strojů, SNTL/ALFA 1968
Hindmarsh,J.: Electrical Machines and their Applications, Oxford,1970
Way of continuous check of knowledge in the course of semester
Conditions for credit:
Classification on points
Participation on laboratory excercises
All protocols of laboratory works
Test results
E-learning
Other requirements
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Lectures:
Types of electric machines. Materials used by electric machines design. Enclosure, shape and cooling. Laws, equations and methods used in electric machines.
Principle and description of transformer. Operation states. Equivalent circuit. Phasor diagram.
Three-phase transformers. Winding connection. Operation in parallel. Special types of transformers.
Magnetic field of electric machines. Types and function of winding.
Use of induction machines. Design types and foundation dates. Function and operation state.
Energy recapitulation of induction machines. Equivalent circuit. Torque.
Starting and speed control of induction motors. Induction generator and brake.
Single phase induction motors.
Synchronous machines. Use and designing arrangement. Function.
Operation states and properties. Solitary operation. Parallel operation with network. Synchronization conditions.
Synchronous motors and compensators. Stability of synchronous machines.
DC machines principles. No load and loaded state of DC machine. Theory of commutation.
Properties and use of DC motors.
Types of DC machines. Excitation. DC machine torque.Principle and operation of AC commutator machines.
Exercises:
Calculation excercise of transformers.
Calculation excercise of asynchronous machines.
Calculation excercise of synchronous machines.
Calculation excercise of direct current machines.
Laboratories:
Familirization with laboratory practice, safety training, mark condition
Transformer measurement(no-load, short-circuit).
Measurement by three-phase transformer winding connection.
No-load test and locked-rotor test of asynchronous motor and load test of asynchronous motor.
No-load and short-circuit test of synchronous machine.
V-curves test.
Test
Accreditation.
Projects:
Project consists of elaboration of protocols from laboratory excercises, with values, diagrams and evaluation of results.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction