2017/07/05 by Holagh, Hossein Valiyan, Najafabadi, Tooraj Abbasian, Mohsen Mahoor +1
Engineering · #Electric Motor Design and Analysis #FOS: Electrical engineering #Multilevel Inverters and Converters #Sensorless Control of Electric Motors #Systems and Control (eess.SY) #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.1707.01777
openalex publication_date 2017/07/05 · openalex created_date 2021/06/22 · openalex updated_date 2026/07/28
Conventionally, Selective Harmonic Elimination (SHE) method in 2-level\ninverters, finds best switching angles to reach first voltage harmonic to\nreference level and eliminate other harmonics, simultaneously. Considering\nInduction Motor (IM) as the inverter load, and wide DC bus voltage variations,\nthe inverter must operate in both over-modulation and linear modulation region.\nMain objective of the modified SHE is to reduce harmonic torques through\nfinding the best switching angles. In this paper, optimization is based on\noptimizing phasor equations in which harmonic torques are calculated. The\nprocedure of this method is that, first, the ratio of the same torque harmonics\nis estimated, secondly, by using that estimation, the ratio of voltage\nharmonics that generates homogeneous torques is calculated. For the estimation\nand the calculation of the ratios motor parameter, mechanical speed of the\nrotor, the applied frequency, and the concept of slip are used. The advantage\nof this approach is highlighted when mechanical load and DC bus voltage\nvariations are taken into consideration. Simulation results are presented under\na wide range of working conditions in an induction motor to demonstrate the\neffectiveness of the proposed method.\n