Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

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    Studying the dynamics of the second-order DC-DC converter with single and multi-loop feedback for the optimum bandwidth
    (Institute of Electrical and Electronics Engineers Inc., 2014) Shetty, C.
    As far as the complexity of the current mode control is concerned, illogical choosing of the phase cross over frequency for a converter doesn't bring any significant advantages over the voltage mode control. So, one has to select the bandwidth carefully so that benefits of the current mode control will trade off with the complexity of implementing the scheme. The reported work emphasizes on the importance of choosing the optimum bandwidth in the current mode control which can claim all the benefits of this complex current mode control scheme. The advantages are: a) reduction in the order of the controller due to decreased phase boost demand b) scaling down in the size of the capacitor, inversely proportional to cross over frequency, of the compensator network and consequently demands very less current to drive as a network which prevents overloading of the output of the operational amplifier and, c) improved response speed. In this paper, for demonstration purpose, the dynamic performance of the non inverting synchronous up down converter, second order converter, is carried out for both the voltage mode and the current mode feedback with different cross over frequencies. The simulation is carried out in Pspice. © 2014 IEEE.
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    A Full Bridge Series-Series Resonant IPT System Optimized for Charging Electric Vehicle Batteries Across an Extensive Range
    (Institute of Electrical and Electronics Engineers Inc., 2024) Kishan, D.; Vinod, M.; Chub, A.
    Designing an effective inductive charging system for electric vehicles, with distinct battery pack voltages ranging from 200 V to 800 V, poses considerable challenges. Conventionally, addressing this broad battery range involves using a secondary-side DC-DC converter with diode bridge rectifiers or controlled rectifiers, but this approach increases onboard vehicle weight and introduces complex control issues, leading to reduced system efficiency. This article proposes an innovative solution in the form of a wide-gain converter with two sets of coupled coils designed to efficiently charge batteries across different voltage ranges. The proposed system operates in four modes: voltage doubler (V-D), current doubler (I-D), full-bridge (F-B), and half-bridge (H-B) the system. The proposed system is simulated in MATLAB simulations, and the simulated performances are validated using a laboratory prototype at different output voltage and power levels. Additionally, the laboratory prototype with SiC devices has been constructed. The efficiency analysis at various loading conditions has been evaluated. © 2024 IEEE.
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    A Full Bridge Series-Series Resonant IPT System Optimized for Charging Electric Vehicle Bateries Across an Extensive Range
    (Institute of Electrical and Electronics Engineers Inc., 2024) Kishan, D.; Vinod, M.; Chub, A.
    Designing an effective inductive charging system for electric vehicles, with distinct battery pack voltages ranging from 200 V to 800 V, poses considerable challenges. Conventionally, addressing this broad battery range involves using a secondary-side DC-DC converter with diode bridge rectifiers or controlled rectifiers, but this approach increases onboard vehicle weight and introduces complex control issues, leading to reduced system efficiency. This article proposes an innovative solution in the form of a wide-gain converter with two sets of coupled coils designed to efficiently charge batteries across different voltage ranges. The proposed system operates in four modes: voltage doubler (V-D), current doubler (I-D), full-bridge (F-B), and half-bridge (H-B) the system. The proposed system is simulated in MATLAB simulations, and the simulated performances are validated using a laboratory prototype at different output voltage and power levels. Additionally, the laboratory prototype with SiC devices has been constructed. The efficiency analysis at various loading conditions has been evaluated. © 2024 IEEE.