Open AccessSensorless DTSMC of a three‐level VSI fed PMSM drive
Author(s) -
Eldigair Yousif,
Beig Abdul R.,
Alsawalhi Jamal
Publication year - 2020
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5523
Subject(s) - control theory (sociology) , total harmonic distortion , pulse width modulation , observer (physics) , computer science , inverter , voltage , controller (irrigation) , engineering , control (management) , physics , artificial intelligence , agronomy , quantum mechanics , electrical engineering , biology
This study proposes a novel sliding mode control (SMC) structure for a three‐level voltage source inverter (VSI). The proposed controller is implemented in discrete time and is applied for the closed‐loop speed control of permanent magnet synchronous motor (PMSM) drive powered from a three‐level cascaded H‐bridge VSI. The proposed discrete time SMC (DTSMC) has the distinct advantages of control over maximum switching frequency and relatively lower total harmonic distortion compared to that of a conventional hysteresis modulation (HM) control. Unlike HM, the proposed DTSMC relates the maximum switching frequency to sampling time, resulting in better utilisation of the bandwidth of the VSI. Additionally, a procedure to combine the DTSMC with a sliding mode observer to achieve sensor‐less operation of the PMSM drive is presented. Verification of the proposed DTSMC is conducted using simulation and experimental tests. The simulation and experimental results are presented.