• Totyo Iliev Department of Electric Power Supply and Equipment, Technical University of Gabrovo (BG)
  • Tsanko Karadzhov Department of Mechanical and Precision Engineering, Technical University of Gabrovo (BG)




Microprocessor, Microcontroller, Asynchronous Electric Machine, temperature sensor


The paper is about four channel microprocessor system for temperature measurement during static and running mode. It incorporates microcontroller type PIC18F452 and employs sensors which convert temperature into voltage. In addition it features optional connection to a PC for storing and processing amassed data. Based on this system a new method is proposed for analysing overheating and cooling of individual parts of asynchronous electric machines. A set of differential equations is derived which later on are processed by MATHCAD software. Obtained results can be presented in tabular or graphic form. The outcome of resolving this task is in the relative ease with which it is possible to establish overheat of various machine parts. Similarly, such approach could be applied with other types of electric machines.


Download data is not yet available.


A. Dumcius, V. Augutis and D. Gailius, "The Approximation Aspects of Characteristics of Semiconductor Temperature Sensors," Electronics and Electrical Engineering, no. 6(112), pp. 47-50, 2011.

O. Krejcar, I. Spicka and R. Frischer, "Implementation of Full-Featured PID Regulator in Microcontrollers," Electronics and Electrical Engineering, no. 7(113), pp. 77-82, 2011.

R. Hajovsky and M. Pies, "Complex Measuring System for Longtime Monitoring and Visualization of Temperature and Toxic Gases Concentration," Electronics and Electrical Engineering, no. 6(122), pp. 129-132, 2021.

V. Markevicius and D. Navikas, "Adaptive Thermo-Compensation of Magneto-Resistive Sensor," Electronics and Electrical Engineering, no. 8(114), pp. 43-46, 2011.

J. Leskauskaite and A. Dumcius, "The Selection of Thermistors for the Temperature Measurement Gear," Electronics and Electrical Engineering, no. 5(111), pp. 59-62, 2011.

B. Gilev, N. Hinov and H. Ibrishimov, "Mathematical Model of Induction Heating with Heat Transfer of Cylindrical Body for Pressing Treatment," in 2019 International Conference on High Technology for Sustainable Development, Sofia, 2019, DOI: 10.1109/HiTech48507.2019.9128250

N. D. Mazharov, S. M. Hristov, D. A. Dichev and I. S. Zhelezarov, "Some problems of dynamic contactless charging of electric vehicles," Acta Polytechnica Hungarica, vol. 14, no. 4, pp. 7-26, 2017, DOI: 10.12700/APH.14.4.2017.4.1

[Online]. Available: http://www.ti.com/lit/ds/symlink/lm35.pdf.

[Online]. Available: http://ww1.microchip.com/downloads/en/devicedoc/39564c.pdf.




How to Cite

T. Iliev and T. Karadzhov, “MICROPROCESSOR SYSTEM FOR TEMPERATURE INVESTIGATION OF AC MACHINES”, ETR, vol. 3, pp. 110–115, Jun. 2021, doi: 10.17770/etr2021vol3.6574.