Electrical machines and drives
Code  Completion  Credits  Range  Language 

2141505  Z,ZK  4  2P+2L  Czech 
 Lecturer:
 Tutor:
 Supervisor:
 Department of Instrumentation and Control Engineering
 Synopsis:

AC el. curcuits. Electrical power and energy. Calculation, measurement, power factor.
Magnetic circuit, materials, hysteresis loop. Electromagnet. Transformer, principle, construction, 3phase transformer, operating conditions, rated (scheduled) values. Induction machine, principle, construction, operating conditions. Starting, speedtorque characteristic, speed control. Synchronous machines. DCmachines, principle, parameters, operating conditions, construction, starting, speed control, speedtorque characteristic. Lowvoltage instruments.
Lowvoltage distribution system.
 Requirements:

Magnetic materials and Magnetic circuits. DC and AC electromagnets. 3phase power measurement. Transformer, principle, theory, equivalent circuit, phasor diagram, instrument transformer design. Transformer: Opencircuit test, Shortcircuit test; drop of voltage by loading. 3phase transformer, hour angle. Special transformers. Asynchronous motor, principle, construction, operating parameters., 6.As. Motor  theory, equivalent circuit, losses  subdivision., 7.Speedtorque characteristic. Circle diagram. Singlephase as. motor, 8.Asynchronous motor  starting, speed control., 9.Synchronous machine, generator, motor, reluctance and stepper motors, 10.DCmachines, principle, theory, equivalent circuit, fundamental equations., 11.DC  separately excited; ( shunt;  series) motor, speed  torque characteristic, starting., 12.WardLeonard system, speed controlling of DCmotors,, Singlephase commutator motor., 13.Lowvoltage instruments, fuses, breakers, residual current devices, 14.Lowvoltage power network., # oc_a, 1.Group subdivision, repetition of safety work rules. Calculations:, 3phase ACcircuits and 3phase power. Measuring Instruments., 2.3phase power measurement: 3 Wattmeter method; artificial connections  1 Wmethod, 2 W (Aron) method; reactive power and power factor; nonharmonic waveforms measurement., 3.Magnetic circuits measurement, electromagnet characteristic measurement, magnetic circuit calculation., 4.Power semiconductors, steadystate characteristics, cooling. Cooling calculation and verification., 5.1phase transformer: Opencircuit test, Shortcircuit test; loading
 Syllabus of lectures:

1. Calculation of AC circuits using SKM (Phasors) methode. 3phase power calculation and measurement.
2. Magnetic materials and Magnetic circuits.
DC and AC electromagnets.
3.Transformer, principle, theory, equivalent circuit, phasor diagram, instrument transformer design.
4.Transformer: Opencircuit test, Shortcircuit test; drop of voltage by loading. 3phase transformer, hour angle. Special transformers.
5.Asynchronous motor, principle, construction, operating parameters.
6.As. Motor  theory, equivalent circuit, losses  subdivision.
7.Speedtorque characteristic. Circle diagram. Singlephase as. motor
8.Asynchronous motor  starting, speed control.
9.Synchronous machine, generator, motor, reluctance and stepper motors
10.DCmachines, principle, theory, equivalent circuit, fundamental equations.
11.DC  separately excited; ( shunt;  series) motor, speed  torque characteristic, starting.
12.WardLeonard system, speed controlling of DCmotors,
Singlephase commutator motor.
13.Lowvoltage instruments, fuses, breakers, residual current devices
14.Lowvoltage power network.
 Syllabus of tutorials:

1.Group subdivision, repetition of safety work rules. Calculations:
3phase ACcircuits and 3phase power. Measuring Instruments.
2.3phase power measurement: 3 Wattmeter method; artificial connections  1 Wmethod, 2 W (Aron) method; reactive power and power factor; nonharmonic waveforms measurement.
3.Magnetic circuits measurement, electromagnet characteristic measurement, magnetic circuit calculation.
4.Power semiconductors, steadystate characteristics, cooling. Cooling calculation and verification.
5.1phase transformer: Opencircuit test, Shortcircuit test; loading characteristic. Examples, transformer design. Movie: Transformers production.
6.Asynchronous motor, terminals box, stator resistors measurement. Noload test, Lockedrotor test. Movie: As. Motors production.
7.As. Motor  frequency and voltage control; single phase power supply. Examples of As. Motordrives.
8.As. Motor (Single phase, 3phase)  loading test. Circle diagram. Examples Performance of As. Motordrives.
9.Contactors automation. // Synchronous machine  Noload test, Shortcircuit test, Synchronising.
10. Waveforms of characteristic quantities in the chopper connection with DCmotor (duty factor dependence). Examples Performance of DC machine  drives.
11. Control characteristics of DCmotor (Noload test), VA characteristic of DC  motoroperated (and generatoroperated) state. Magnetic neutral plane setting. Movie: DCmachines.
12. Contactors automation. // Synchronous machine  Noload test, Shortcircuit test, Synchronising.
13. DCmachines  loading test, speedtorque characteristics of DC separately excited.(series) motor. ACcommutator motor measurement.
14. Assessment.
 Study Objective:

Obtained knowledge of electrical machines and drives which is necessary for mechanical engineers.
 Study materials:

Chapman Stephen J., Electric Machinery Fundamentals, McGrawHill Publishing Company, 1985, ISBN 0070106622
 Note:
 Further information:
 http://elektro.fs.cvut.cz
 No timetable has been prepared for this course
 The course is a part of the following study plans:

 10 62 67 00 BTZI 2012 P základ (compulsory course in the program)
 11 68 73 00 BTZI 2012 K základ (compulsory course in the program)
 02 26 31 34 BSTR EPT 2012 P základ (compulsory course in the program)
 03 26 31 36 BSTR IAT 2012 P základ (compulsory course in the program)
 04 26 31 38 BSTR KPP 2012 P základ (compulsory course in the program)
 06 40 45 48 BSTR EPT 2012 K základ (compulsory course in the program)
 07 40 45 50 BSTR IAT 2012 K základ (compulsory course in the program)
 08 40 45 52 BSTR KPP 2012 K základ (compulsory course in the program)
 05 40 45 46 BSTR TZP 2012 K základ (compulsory course in the program)
 05 40 45 46 DSTR TZP 2012 K základ (compulsory course in the program)
 06 40 45 48 DSTR EPT 2012 K základ (compulsory course in the program)
 07 40 45 50 DSTR IAT 2012 K základ (compulsory course in the program)
 08 40 45 52 DSTR KPP 2012 K základ (compulsory course in the program)
 10 62 67 00 DTZI 2012 P základ (compulsory course in the program)
 11 68 73 00 DTZI 2012 K základ (compulsory course in the program)