Time & Venue: 2.30 pm at ESB 244
Speaker: Niraja S [EE14D012]
- Dr. Mahesh Kumar (Chairperson)
- Dr. Lakshminarasamma N (Guide)
- Dr. Krishna Vasudevan
- Dr. Kalyan Kumar B
- Dr. Ganapathy Krishnamurthi [ED]
Full bridge converter variants are the commonly used topology for high gain, high power applications. The full bridge resonant transition converter exhibits an inherent drop in the DC voltage gain, which is a function of switching frequency, turns ratio and transformer leakage inductance. This drop in the DC gain is significant for high power, high gain converters fed from low input voltage. Thus, computing this drop and analyzing the effects of switching frequency becomes necessary in achieving the required steady-state DC gain. From the analysis made, it is observed that, for a choice of switching frequency above fs critical, the required steady-state DC voltage gain is not achieved for any turns ratio.
The Buck-Boost converter variant with hybrid control scheme is proposed. The proposed converter features high DC-gain, soft switching, continuous input and output currents. The proposed hybrid control scheme mitigates the DC current in the transformer without altering the steady state DC voltage gain. The proposed HCS consists of DC-current compensation loop to mitigate the DC-current in the transformer with no additional components and output regulation loop to regulate the output. The output regulation and DC-current compensation loops are independent of each other. This control scheme could be extended to phase modulated resonant transition converter to mitigate the DC current caused due to dissimilarities in the switch parameters.
The simulation and experimental results verifying the loss model and proposed buck-boost converter with the hybrid control scheme are presented.
All Are Cordially Invited!