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help needed to interface 3-phase(230v 50hz) ac signal

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anees_av

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help needed to interface 3-phase(230v 50hz) ac signal for phase checking and correcting the phase

using pic 16f73, using 3-adc channel

the voltage is stepped down using 3-step down transformer to 5 volt

help needed in writing program in assembely and c-language
 

Hi

Use a timer which is reset at the zero crossing of any phase of them.
correct time if there's no phase problem must be
50Hz==> 20ms
we have 2 crossing per cycle so 20ms/2=10ms
we have 3 phases so 10ms/3==>3.33 ms must be the time between each phase zero crossing and the next for correct phase.

This is my idea , it may be wrong. think of it 1st

Salam
Hossam Alzomor
www.i-g.org
 

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