Conference Papers

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    Design and implementation of a laboratory scale three-phase thyristor controlled reactor
    (Institute of Electrical and Electronics Engineers Inc., 2017) Abhyankar, B.G.; Shubhanga, K.N.; Navada, H.G.
    This paper presents design, implementation and analysis of a laboratory scale three-phase thyristor controlled reactor (TCR). The performance of the TCR is demonstrated through many case studies for different connections of the TCR branches. A detailed harmonic analysis is carried out to understand the harmonic behaviour of the setup. The fundamental reactance characteristics of the TCR is also obtained experimentally and compared with ideal characteristics. A simulation model is developed using 'MATLAB' to verify the oscilloscope captured-waveforms. This setup is found to be a good learning resource for introducing variable reactance nature of a TCR. © 2017 IEEE.
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    Analysis of a laboratory scale three-phase FC-TCR-based static VAr compensator
    (Institute of Electrical and Electronics Engineers Inc., 2017) Gajanana Abhyankar, B.; Shubhanga, K.N.; Girisha Navada, H.
    This paper presents the design and steady-state analysis of a Fixed Capacitor-Thyristor Controlled Reactor (FC-TCR)-based Static VAr Compensator (SVC). Reactive power compensation is demonstrated through the fundamental frequency analysis of the samples acquired from the designed system. The performance of the SVC in the presence of line reactance is also discussed. National Instrument (NI) based data acquisition system is used to perform the steady-state analysis. Besides, a few transient responses are also captured using the data acquisition system. © 2017 IEEE.
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    Dynamic characteristics of drilling spindle supported by radial permanent magnet bearings
    (Elsevier Ltd, 2020) Chalageri, G.R.; Bekinal, S.I.; Doddamani, M.
    This paper presents the drilling spindle dynamic and harmonic characteristics supported by radial permanent magnet bearings (PMBs). Initially, multi-ring radial PMB is designed in proportionate to the dimensions of drilling spindle using Coulombain model and vector approach. Dynamic analysis of spindle is carried out for three different combinations between conventional angular contact bearings (ACBs) and PMBs. First, the spindle was supported by only ACBs. Second, ACBs were completely replaced by radial PMBs and one ACB was used in between two PMBs making it as a hybrid bearing set (HBS) in the last case. The effect of bearing preload, bearing span and cutting force on the spindle natural frequency, harmonic frequency and critical speed of drilling spindle system was investigated through rotor dynamic analysis. This analysis focuses on the feasibility of successful usage of HBS in drilling machine spindles with higher critical speeds and maximum amplitudes produced due to chattered vibrations and tangential cutting forces. © 2019 Elsevier Ltd.