I want to get a recent researched topic on power electronics for seminar

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Not satisfactory so give me current seminar topics on silicon controlled rectifier

nptel power electronics seminar topics

Power Electronics
Constructional Features, Operating Principle, Characteristics and Specification of Power Semiconductor Diode
Power Bipolar Junction Transistor (BJT)
Thyristors and Triacs
Gate Turn Off Thyristor (GTO)
Metal Oxide Semiconductor Field Effect Transistor (MOSFET)
Insulated Gate Bipolar Transistor (IGBT)
Hard and Soft Switching of Power Semiconductors
Single Phase Uncontrolled Rectifier
Single Phase Fully Controlled Rectifier
Single Phase Half Controlled Bridge Converter
Single Phase Uncontrolled Rectifier
Operation and Analysis of the Three Phase Fully Controlled Bridge Converter
Operation and Analysis of Three Phase Half Controlled Converter
Effect of Source Inductance on the Performance of AC to DC Converters
Power Factor Improvement, Harmonic Reduction, Filter
Types of Basic DC-DC Converters