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1

Lyapunov stability based sliding mode observer for sensorless control of permanent magnet synchronous motor

Navaneethan Soundirarajan, Kanthalakshmi Srinivasan, Aandrew Baggio S.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2022

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Vol. 70, nr 2

art. no. e140353

EN

In recent years there has been an increasing demand for electric vehicles due to their attractive features including low pollution and increase in efficiency. Electric vehicles use electric motors as primary motion elements and permanent magnet machines found a proven record of use in electric vehicles. Permanent magnet synchronous motor (PMSM) as electric propulsion in electric vehicles supersedes the performance compared to other motor types. However, in order to eliminate the cumbersome mechanical sensors used for feedback, sensorless control of motors has been proposed. This paper proposes the design of sliding mode observer (SMO) based on Lyapunov stability for sensorless control of PMSM. The designed observer is modeled with a simulated PMSM model to evaluate the tracking efficiency of the observer. Further, the SMO is coded using MATLAB/Xilinx block models to investigate the performance at real-time.

2

Fuzzy logic controller based maximum power point tracking technique for different configurations of partially shaded photovoltaic system

Naick B. K., Chatterjee K., Chatterjee T. K.

Archives of Electrical Engineering

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2018

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Vol. 67, nr 2

307--320

EN

A solar photovoltaic (PV) system has been emerging out as one of the greatest potential renewable energy sources and is contributing significantly in the energy sector. The PV system depends upon the solar irradiation and any changes in the incoming solar irradiation will affect badly on the output of the PV system. The solar irradiation is location specific and also the atmospheric conditions in the surroundings of the PV system contribute significantly to its performance. This paper presents the cumulative assessment of the four MPPT techniques during the partial shading conditions (PSCs) for different configurations of the PV array. The partial shading configurations like series-parallel, bridge link, total cross tied and honeycomb structure for an 84 PV array has been simulated to compare the maximum power point tracking (MPPT) techniques. The MPPT techniques like perturb and observe, incremental conductance, extremum seeking control and a fuzzy logic controller were implemented for different shading patterns. The results related to the maximum power tracked, tracking efficiency of each of the MPPT techniques were presented in order to assess the best MPPT technique and the best configuration of the PV array for yielding the maximum power during the PSCs.

3

Static and dynamic MPP-tracking efﬁciency of PV-inverter using recorded irradiance

Marańda W., Piotrowicz M.

International Journal of Microelectronics and Computer Science

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2013

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Vol. 4, nr 4

181--185

EN

This paper investigates the energy losses introduced by Maximum Power Point Tracking operation of photovoltaic (PV) inverter. In contrast to other studies, this evaluation has been done with the recorded real-life solar irradiance data applied to the simulation of the PV-generator and tracking algorithm. The true MPP output of photovoltaic generator has been calculated with electro-thermal model and the simulation has been carried out with 1 s time resolution. The efﬁciency results have been presented for both static and dynamic MPP-tracking investigated With basic and simpliﬁed Perturb&Observe algorithm with several tracking speed rates. In addition to the simulation, the inverter efﬁciency measurements for ﬁeld- installed inverter have been presented.