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Suggestions needed for 3 phase phasor detection

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ringo888

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3 phase phasor detection

Hi Gents,

I'm trying to detect the cross point of the 3 phases using analog circuit design and wanted some suggestions. the phases cross on the negative side at ever 120deg, i'd like some way of detecting this to a micro, any ideas?

Regards,
Ringo888
 

FvM

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3 phase phasor detection

Did you consider analog comparators?
 

ringo888

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Re: 3 phase phasor detection

Hi FvM,

Yes I had initially thought of using a comparator in some way but wasn't sure on the circuit required, any suggestions?

Thanks,
Ringo
 

FvM

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3 phase phasor detection

The basic circuit involves three comparators for the individual phase voltages.
 

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