Electric Drives

Lecturer:

Tutor:

Supervisor:

Department of Electric Drives and Traction

Synopsis:

Application of motion equation in drives, the load- and dynamical motor torque. Operating modes, electromechanical transient effects. Load types and losses. Drives with DC motors, induction motors, synchronous motors, step motors and switch reluctance motors (SRM). For each type its properties, start, breaking, speed control and block scheme of regulation, range of application.

Requirements:

Active participation on labs (max.3 excused absences), elaboration of check test, presentment of own lab works

Syllabus of lectures:

1.Introduction in electric drive, its definition, advantages and disadvantages, classification.

2.Control of drives, logic control, continuous control, transfer functions, static and dynamic system behavior.

3.Motion equation, method of solution, types of motor torque, load torque, dynamical torque, operating modes.

4.Electromechanical transient effects, types of load, losses in drives, dimensioning by load variation.

5.Drives with external excited DC motors: Mathematical model, block scheme of speed control, reversible drives.

6.Drives with serious excited DC motors: Mathematical model, block scheme of speed control, traction applications.

7.Drives with induction motors: Matematical model, start and breaking methods, softstart.

8.Drives with induction motors: Scalar, vector and direct torque control methods.

9.Electrical shaft.

10.Drives with synchronous motors, mathematical model, start and breaking methods, excitation systems.

11.Variable speed drives with synchronous motor, drives with cycle-converter.

12.Drives with step motors, SRM (switch reluctance motor).

13.Design of electric drive, procedure by supplier selection.

14.Commissioning of electric drives.

Syllabus of tutorials:

1.Introduction with the lab, safety regulations, laboratory rules, record of unrepeated effect.

2.Contact control of electric drive, Setting of individual tasks, introduction with contact control laboratory equipment.

3.Practice by programming of logic automat Moeller.

4.Transient effects in electric drives, time constant measurement.

5.Calculation of examples.

6.Measurement of a inertia moment and dynamic torque characteristics.

7.Dimensioning, determination of rate power by a periodically changed drive load.

8.Check test, Function verification of designed contact control on laboratory equipment and LC Moeller

9.Measurement of the external excited DC motor with reversible controlled rectifier.

10.Speed control of an induction motor fed from frequency converter

11.Measurement on variable speed drives with synchronous motor

12.Measurement on electric shaft.

13.Measurement of servomotor KEB-S4 and linear motor LINMOT

14.Credit

Study Objective:

Study materials:

1.Leonhard, W.: Control of Electrical Drives; Springer Verlag, 2001

2.Pavelka, J: Elektrické pohony; Praha: ČVUT. 2006

3.Pavelka, J., Lett, J., Hlinovský, V.: Cvičení z elektrických pohonů; Praha: ČVUT. 2007

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Heavy-current Engineering- structured studies (compulsory course)
• Softwarové inženýrství (elective specialized course)
• Web a multimedia (elective specialized course)
• Manažerská informatika (elective specialized course)
• Inteligentní systémy (elective specialized course)