I’ve always found application notes to be great places to expand your knowledge and understanding. Microchip have released or rather re-released a handful of power electronics related notes this month:
Advanced IGBT Driver Application Manual
https://www.microchip.com/wwwAppNotes/AppNotes.aspx?appnote=en1002313
High Frequency Resonant Half Bridge
https://www.microchip.com/wwwAppNotes/AppNotes.aspx?appnote=en1002291
IGBT Tutorial
https://www.microchip.com/wwwAppNotes/AppNotes.aspx?appnote=en1002315
Introduction to MOSFETs
https://www.microchip.com/wwwAppNotes/AppNotes.aspx?appnote=en1002293
Introduction to Rectifier Bridges and Dual Diodes
https://www.microchip.com/wwwAppNotes/AppNotes.aspx?appnote=en1002781
Introduction to Rectifiers
https://www.microchip.com/wwwAppNotes/AppNotes.aspx?appnote=en1002294
Latest Technology PT IGBTs vs. Power MOSFETs
https://www.microchip.com/wwwAppNotes/AppNotes.aspx?appnote=en1002316