20.500.12556/RUL-131957 Analysis of equivalent inductance of three-phase induction motors in the switching frequency range The equivalent inductance of three-phase induction motors is experimentally investigated in this paper, with particular reference to the frequency range from 1 kHz to 20 kHz, typical for the switching frequency in inverter-fed electrical drives. The equivalent inductance is a basic parameter when determining the inverter-motor current distortion introduced by switching modulation, such as rms of current ripple, peak-to-peak current ripple amplitude, total harmonic distortion (THD), and synthesis of the optimal PWM strategy to minimize the THD itself. In case of squirrel-cage rotors, the experimental evidence shows that the equivalent inductance cannot be considered constant in the frequency range up to 20 kHz, and it considerably differs from the value measured at 50 Hz. This frequency-dependent behaviour can be justified mainly by the skin effect in rotor bars affecting the rotor leakage inductance in the considered frequency range. Experimental results are presented for a set of squirrel-cage induction motors with different rated power and one wound-rotor motor in order to emphasize the aforesaid phenomenon. The measurements were carried out by a three-phase sinusoidal generator with the maximum operating frequency of 5 kHz and a voltage source inverter operating in the six-step mode with the frequency up to 20 kHz. equivalent inductance leakage inductance switching frequency induction motor current ripple current switching ripple switching frequency modelling ekvivalentna induktivnost razsipana induktivnost stikalna frekvenca asinhronski motor valovitost toka true false true Angleški jezik Slovenski jezik Članek v reviji 2021-10-07 09:19:51 2021-10-07 09:19:52 2022-09-12 04:10:23 0000-00-00 00:00:00 2019 0 0 10 str. iss. 2, art. 120 Vol. 8 Feb. 2019 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.31 2079-9292 10.3390/electronics8020120 12339540 RAZ_Srndovic_Milan_2019.pdf RAZ_Srndovic_Milan_2019.pdf 1 42B7FDB7A0EA84DAECB0736CC249F682 2bcba912aa736561faf510a7af681bfce7db613ec1ac532103ed3ec7d69c6da6 18c160ca-273f-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=149421 https://www.mdpi.com/2079-9292/8/2/120 1 ab02f72a-273e-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=149420 Fakulteta za elektrotehniko 0 0 0