Three phase motor control in microc with PIC16F877A using TRIAC

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jean12

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Hello,I would like to control a three phase motor respecting phase order,could you advise on how I can do it,for zero crossing detection I used an operational amplifier as a comparator for detecting the zero crossing level,and I also I want to start from a low speed which could be increased with a push button,I planned to use the TRIAC BTA26-600 for doing so,could you please help?

The motor has a power of 11KW

Thank you!!
 

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