Hi Sylvio,

(Somehow related).

Speed Control of 3-Phase Induction Motor Using PIC18 Microcontrollers

Microchip AN843: (PDF)
http://ww1.microchip.com/downloads/e...tes/00843a.pdf

(Code and PDF).
http://www.microchip.com/stellent/id...pnote=en012011

Example of 3-phase bridge driver chip:
http://www.irf.com/product-info/data...ata/ir2136.pdf

Best regards,

Luciano