about AC induction motor drivers

[mutlu_sgul]

Hello all
I need to construct a three phase AC induction motor driver with AT89S8252. Does any body now how to calculate PWM signals and generate them? Please help me... If there is any inverter softwares please send me them...

 

[dian]

please see image below,
basic concept is compare triangle wave form with sinusoidal wave form.
result of comparison should be a a set of logic form. use the logic (rectangular) wave form to trigger the power module.

in practical condition i calculate the sine wave form, then map the rectangular as data (6 of 8 bit data) then with specify delay time, burst the data as the power module trigger.

 

[wisata]

saya baru gabung, mau tanya2 tapi masih bingung.