I need to detect the zero voltage for switching on the mosfet .i am currently working on quasi resonant converter.do anyone have an idea on how to detect the zero voltage crossing using simulink blocks?

how to detect the zero voltage crossing using simulink blocks.

Answer 1

[Guy Rouleau]

The Hit Crossing block is designed especially to detect zero-crossing.

http://www.mathworks.com/help/toolbox/simulink/slref/hitcrossing.html

Answer 2

[mahmoud ibrahim]

you can use switch and make it u=0 http://www.mathworks.com/help/toolbox/simulink/slref/switch.html