20.500.12556/RUL-136350 Algorithm execution time and accuracy of NTC thermistor-based temperature measurements in time-critical applications This paper addresses the challenges of selecting a suitable method for negative temperature coefficient (NTC) thermistor-based temperature measurement in electronic devices. Although measurement accuracy is of great importance, the temperature calculation time represents an even greater challenge since it is inherently constrained by the control algorithm executed in the microcontroller (MCU). Firstly, a simple signal conditioning circuit with the NTC thermistor is introduced, resulting in a temperature-dependent voltage U$_T$ being connected to the MCU’s analog input. Next, a simulation-based approximation of the actual temperature vs. voltage curve is derived, resulting in four temperature notations: for a look-up table principle, polynomial approximation, B equation and Steinhart–Hart equation. Within the simulation results, the expected temperature error of individual methods is calculated, whereas in the experimental part, performed on a DC/DC converter prototype, required prework and available MCU resources are evaluated. In terms of expected accuracy, the look-up table and the Steinhart–Hart equation offer superior results over the polynomial approximation and B equation, especially in the nominal temperature range of the NTC thermistor. However, in terms of required prework, the look-up table is inferior compared to the Steinhart–Hart equation, despite the latter having far more complex mathematical functions, affecting the overall MCU algorithm execution time significantly. NTC thermistor temperature measurement microcontrollers control algorithm calculation time power electronics NTK termistor merjenje temperature mikrokrmilniki regulacijski algoritem čas izračuna močnostna elektronika true false true Angleški jezik Slovenski jezik Članek v reviji 2022-04-25 14:08:49 2022-04-25 14:08:50 2022-09-15 04:13:47 0000-00-00 00:00:00 2021 0 0 16 str. iss. 18, art. 2266 Vol. 9 Sep. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.38:681.586.69 2227-7390 10.3390/math9182266 77467651 mathematics-09-02266-v2.pdf mathematics-09-02266-v2.pdf 1 8CE82CD2A56F357D53955433D4AB44D5 6b66cd21231043edf5c06c6575a0e421fc339bbc7105537f8f98d6271e82ccea 9f6eb544-c490-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=155948 https://www.mdpi.com/2227-7390/9/18/2266 1 643e0495-c490-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=155947 Fakulteta za elektrotehniko 0 0 0