Faculty Publications

Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736

Publications by NITK Faculty

Browse

Subject: search.filters.subject.Circuit faults

Search Results

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    An Integrated Approach for Current Balancing and Open-Circuit Fault Diagnosis for Interleaved Boost Converter
    (Institute of Electrical and Electronics Engineers Inc., 2024) Muhammed Ramees, M.M.K.P.; Ahmad, W.
    Interleaved boost converters (IBCs) are widely used in many applications such as automotive and renewable energy systems due to their high efficiency, reduced input and output ripple currents, and enhanced voltage regulation. Equalizing the current handled by each phase and embedding an open-circuit switch fault detection module will improve the reliability of the converter. This article addresses these challenges by proposing one diode current sensor at the output, thereby avoiding the need for individual current sensors for each phase. The total diode current and input current of the IBC are sensed, from which the individual phase current is reconstructed. The reconstruction strategy involves selecting the proper sampling instant of the diode current and input current depending on the operating duty cycle. The proposed approach is applicable for both the continuous conduction mode and the discontinuous conduction mode of operation of the converter. Using the reconstructed phase current, both the balancing of the phase current and fault detection are performed. A perturbation-based approach is proposed for the balancing of phase current. The faulty phase can be easily detected from the reconstructed phase current. The proposed method is validated on a prototype of a three-phase IBC showing its robustness and effectiveness. © 2024 IEEE.
  • No Thumbnail Available
    Item
    Fault-Tolerant Operation of Switched Reluctance Motor Using Cascaded Current and PWM Control With Effect of Commutation Angle Variation
    (Institute of Electrical and Electronics Engineers Inc., 2024) Reddy, J.S.; Parthiban, P.
    This paper presents a proposed fault-tolerant control strategy for Switched Reluctance Motor (SRM) drives, utilizing cascaded current and pulse width modulation (PWM) control mechanisms with commutation angle variation. The study systematically evaluates the mechanical performance of SRM drives by regulating voltage and current to achieve robust dynamic response under various fault conditions. Optimal commutation angles are identified to enhance operational efficiency and balance performance under fault scenarios. The comprehensive simulations use a 4 kW, 4 φ, 8/6 SRM model in MATLAB/Simulink; further, real-time experiments are conducted using FPGA-based modelling with a Controller Hardware-in-Loop (CHIL), setup on the OPAL-RT 4510 platform. The proposed control technique demonstrates high fault tolerance and reliable mechanical performance, making it suitable for variable-speed drive applications. The findings underscore the potential of the proposed control strategy to ensure the robust operation of SRM drives in practical implementations, highlighting its significance for enhancing the reliability and efficiency of electric drive systems. © 1972-2012 IEEE.