Conference Papers

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

Browse

Author: search.filters.author.Prakash, P.S.

Search Results

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Design and implementation of sliding mode voltage controller for DC to DC buck converter by using hysteresis modulation and pulse width modulation
    (Institute of Electrical and Electronics Engineers Inc., 2016) Kiran, B.; Parthiban, P.; Jena, D.; Prakash, P.S.
    This paper presents the design and implementation of sliding mode control law to the output voltage control of DC to DC buck converter. The robustness of the sliding mode controller is tested by changing the different circuit components and comparing the results with conventional linear controller. The result shows that the sliding mode controller performs better in the transient condition over a wide range of operation when compared with linear controller. Sliding mode controllers by using hysteresis modulation and pulse width modulation are implemented in MATLAB/simulink. The disadvantages of sliding mode controller by using hysteresis modulation is overcome by using pulse width modulation. © 2016 IEEE.
  • No Thumbnail Available
    Item
    Harmonic Mitigation in 12-Pulse Bridge Rectifier Using DC Current Imposition Technique
    (Institute of Electrical and Electronics Engineers Inc., 2020) Prakash, P.S.; Kalpana, R.; Mohankrishna, B.; Singh, B.
    To enhance the ability of harmonic suppression in a 12-pulse diode bridge rectifier (DBR) using a DC side current imposition technique is proposed in this paper. The 12-pulse operation is achieved by a zigzag auto-connected transformer. The standard 12-pulse DBR does not satisfy the IEEE-519 standard and thus the current imposition technique can be used on the DC side to mitigate the input line current harmonic distortion. The current imposition circuit on DC side contains a doubler circuit along with the tapped interphase transformer (TIPT). The zigzag configured autoconnected transformer has the function to avoid zero sequence components and thereby expel the need for zero-sequence blocking transformer. When the multi-winding interphase reactor is designed optimally, the pulse number of load voltage can be increased from 12 to 24 and by using the TIPT the pulse number of output voltage can be further increased from 24 to 36. The proposed configuration is analyzed and simulated in the MATLAB Simulink and validated with hardware results. The results show that the proposed method improves the power quality by reducing the total harmonic distortion in the input line current. © 2020 IEEE.
  • No Thumbnail Available
    Item
    Third Harmonic Current Injection Based Front-End AC-DC Converter for Power Quality Improvement in DC Distribution Systems
    (Institute of Electrical and Electronics Engineers Inc., 2020) Prakash, P.S.; Kalpana, R.; Singh, B.
    This paper presents the design and implementation of a three-phase buck type unity power factor rectifier used for distribution systems. The AC-DC converter topology considered in this paper is named as SWISS rectifier, consists of front-end three-phase diode bridge rectifier with active current injection circuit and back-end DC-DC buck converter. The characteristics of the AC-DC converter topology, including the principle of operation, modulation schemes, conduction state analysis, and control strategy are discussed in detail. Further, the analytical expression for the loss calculation is performed. Extensive simulation is carried out for the converter system, and the practicability of the converter system is verified by conducting a test on the constructed hardware prototype. © 2020 IEEE.