Leszek Jarzębowicz - Publications - Bridge of Knowledge

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Year 2023
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  • Utility analysis and rating of energy storages in trolleybus power supply system
    Publication

    The article discusses two energy storage applications in power supply system of public electrified transport. The first application aims at reducing the peak power of the traction substation. The second application increases effectiveness of using solar power plant to cover partial power demand of traction supply system. These two applications were discussed and analyzed based on trolleybus supply system in Gdynia, where most measurements...

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Year 2006
Year 2019
  • Synchronized six-step voltage generation in high-speed PMSM drive
    Publication

    Synchronized voltage generation has already been considered in the context of pulse width modulation (PWM). References prove that synchronized PWM substantially decreases subharmonics in inverter output voltage when operating with low switching-to-fundamental frequency ratio. This paper identifies problems of unsynchronized voltage generation in electric drives under six-step inverter operation. Guidelines for the synchronization...

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  • Quasi-discrete modelling of PMSM phase currents in drives with low switching-to-fundamental frequency ratio
    Publication

    This study proposes a new quasi-discrete approach to modelling the permanent magnet synchronous motor (PMSM). The quasi-discrete modelling reflects the impact of continuous rotor movement, which takes place during a control cycle, on the shape of motor current waveforms. This provides much improvement in current modelling accuracy under inverter low switching-to-fundamental frequency operation. The proposed approach may be used...

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Year 2017
Year 2011
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Year 2009
Year 2021
Year 2008
  • Nowe metody diagnostyki technicznej taboru kolejowego
    Publication

    Systemy sterowania pojazdów trakcyjnych można podzielić na następujące dwie główne generacje:- systemy stykowo-przekaźnikowe, w których realizacja programu sterowania wynika z uzależnień elektromechanicznych i sposobu połączenia elementów między sobą,- systemy mikrokomputerowe, w których wzajemne uzależnienia urządzeń wykonawczych i realizacja funkcji sterujących są przejmowane przez program mikrokomputera.Pojazdy obu generacji...

Year 2007

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