I need help regarding the arduino code for phase sequence detection. I want to generate an interrupt and light an led if the phase sequence is disturbed. In the circuit diagram, I am using a diode to rectify the 5V AC sine wave into a positive half wave and supplying that to the analog pins of the …

What would generate that interrupt? Interrupting what? What curcuit diagram? Nothing is visible here. More interrupt... Interrupting what? Why? Why not involve DMA? It's even more sophisticated then Interrupts....

My first question is the source of you 3 phase supply. If from the mains then that has to be addressed first. Next is; what do you consider out of sequence phases? A lost phase? or actually reversed position?

[image] aqk: I want to detect if there is an error in the phase sequence. I How does your Arduino know the phase relationship?

[image] aqk: I am using a diode to rectify the 5V AC sine wave into a positive half wave and supplying that to the analog pins of the arduino. Wouldn't it be easier to use three zero-crossing detector modules? Leo..

Not a complete solution but should illustrate the principle. Probably room, too, for code critique but, still. [image] phase loss detect - Wokwi ESP32, STM32, Arduino Simulator Run IoT and embedded projects in your browser: ESP32, STM32, Arduino, Pi Pico, and more. No installation requi…

What if we give the 3 phases at 3 analog inputs and note their rising edges? The rising edges should come in sequence for example R,Y,B . No?

No! What if you read Y,B,R or B,R,Y. Are you playing with a DELTA wiring or a "Y" wiring system?

The sequence should only be R,Y,B it should generate an interrupt on any other sequence

Is it mains? If so you should have transformers to isolate the voltage. I've used AC output wall warts for some applications. I would use transistors on the output of the transformer (with the appropriate series resistor) as kind of a Zero Crossing detector. I don't see how you could generate an…

Phase Sequence Detection of 3 Phase Supply

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Paul_KD7HB July 25, 2023, 11:38pm 4

How does your Arduino know the phase relationship?

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Phase Sequence Detection of 3 Phase Supply

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