Kıvanç, Ömer CihanOzturk, Salih BarisKivanc, Omer CihanAksoz, AhmetHegazy, Omar2024-05-252024-05-25202012076-341710.3390/app102173972-s2.0-85094663367https://doi.org/10.3390/app10217397https://hdl.handle.net/20.500.14517/2183Ozturk, Salih B/0000-0001-8322-4066; AKSÖZ, Ahmet/0000-0002-2563-1218; Hegazy, Omar/0000-0002-8650-7341A PMSM drive with an incremental encoder or using sensorless control requires alignment to a predetermined rotor position (initial position) or initial rotor position detection at start-up. It is desired to lock the rotor to a known state (usually zero angle) at start-up if the initial rotor position detection is not available or difficult to obtain. In this work, a simple and proper zero angle initial rotor position alignment of four-switch three-phase (FSTP) inverter-based PMSM drive is proposed. Low-frequency voltage signal is applied to the d-axis voltage reference of the open-loop FSTPI based PMSM drive scheme without requiring complex trigonometric calculations, PI current regulators and current sensing. Therefore, fluctuated capacitor voltages at the DC-link are obtained allowing current flown through phase a locking the rotor with zero angle, properly. The proposed method has been implemented using a low-cost FSTP voltage source inverter (VSI) for PMSM drive with a floating-point TMS320F28335 DSP. The effectiveness and the feasibility of the proposed zero angle initial rotor position alignment method for PMSM driven by FSTP inverter have been demonstrated through experimental results.eninfo:eu-repo/semantics/openAccesspermanent magnet synchronous motor (PMSM)four-switch three-phase (FSTP) inverterreduced switch inverterinitial position alignmentsignal injectionArticleQ2Q31021WOS:000588947000001