Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Kocaeli University, Fen Bilimleri Enstitüsü, Otomotiv Mühendisliği Bölümü, Turkey
Approval Date: 2019
Thesis Language: Turkish
Student: AYŞEGÜL GÖLEN ALTUNTAŞ
Supervisor: Rıza Emre Ergün
Open Archive Collection: AVESIS Open Access Collection
Abstract:
Electromagnetic retarders are braking devices used in high-speed trains, amusement
systems in amusement parks and especially in heavy-duty vehicles. Today, in heavyduty vehicles using an electromagnetic retarder, the braking torque is gradually
determined by means of a hand lever. The retarder generates a magnetic field by means
of the electric current applied to the coils, creating braking torque. The resulting
braking torque is proportional to the current intensity applied to the coils.
The mathematical model of the electromagnetic retarder is difficult to draw. The main
reason for this is that the high currents passing through the coils cause a significant heat
increase in the system. The increase in heat leads to changes in the mathematical model
by changing the resistance of the retarder coils. For this reason, fuzzy logic algorithms,
which do not require a mathematical model for the application of retarder control, are
used in this study. Thanks to the fuzzy logic algorithms, real-time control of the system
is provided through the interface software developed using LabVIEW program.
Determination of optimum control parameters, visual and graphical feedback, as well
as braking and speed stabilization application was developed through this interface
software.
Some of the control software of the system was carried out by means of the
STM32F407VG microcontroller used and the other part was carried out via computer
software. In this application thanks to PWM signal which enables the use of
electromagnetic retarder as a speed stabilizer, high resolution braking has been made.
According to the results obtained from the measurements, control was performed with
±50, ±30, ±25 steady state errors for 2500, 2250, 2750 and speed setpoints respectively.