Just surfing the internet today and found this site
PowerDesigners Infoweb - http://www.powerdesigners.com/InfoWeb/index.shtml
The site has following tutorials and other helpful links
Online tutorials - http://www.powerdesigners.com/InfoWeb/flash_tutorials/index.shtml
consisting of follwoing tutorilas
Switching Characteristics for Power Devices
Soft Switching for Power Devices
Soft Switching Inverter Technology
IGBT Characterization with Soft Switching
Interactive power Electronics Online Course - **broken link removed**
PowerDesigners Infoweb - http://www.powerdesigners.com/InfoWeb/index.shtml
The site has following tutorials and other helpful links
Online tutorials - http://www.powerdesigners.com/InfoWeb/flash_tutorials/index.shtml
consisting of follwoing tutorilas
Switching Characteristics for Power Devices
Soft Switching for Power Devices
Soft Switching Inverter Technology
IGBT Characterization with Soft Switching
Interactive power Electronics Online Course - **broken link removed**