3 phase control circuit

electronicsIUST · Mar 11, 2017

Hi, I found below circuit for controlling three phase system and detecting faults like over/under voltage and phase unbalance. But I can't understand some parts. Can anyone help me to analyze this circuit please? Its inputs are 3 phases L1, L2, L3 and control is done by micro controller that in the case of an error activate relay and LEDs.

schmitt trigger · Mar 11, 2017

The schematic appears to be incomplete. And is terribly drawn.

electronicsIUST · Mar 12, 2017

schmitt trigger said:
The schematic appears to be incomplete. And is terribly drawn.

But that's all! and the circuit has bad quality because it was big to fit in the image! but overall is shown.

adnan_merter · Mar 12, 2017

Once, I made a higschool project on controlling 3 phase induction motors and I used mc3phac ic from freescale. It is very easy to control motors with that ic if you have a proper ipm. The reference design is in datasheet. But I don't know if that chip is still in production

3 phase control circuit

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3 phase control circuit

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