Trying to figure out a motor control circuit which has a Triac.

[Yamin]

Hi, I'm tracing a motor control circuit of a coffee grinder. Nothing is broken just doing it for educational purposes. I do not understand how the following resistors and capacitor is connected and its purpose, it doesn't look right to me as I have not seen it like this before. I am assuming its the snubber circuit.

Where is the neutral connection coming into? :S. I haven't continued tracing the rest of the circuit yet. I'm stuck at this point trying to figure out whats happening here. Maybe I'm drawing it in a way that is confusing...

The motor is an asynchronous motor.

Thanks in advance for the help

[Yamin]

I have drawn the other part of the circuit (not the gate connection though) and I'm afraid its even confusing more

[soldar]

It has a speed control knob? My guess is that it is a triac phase control and the transformer supplies low voltage to some kind of control circuit.

[mikerj]

I suspect the main problem is that you've drawn it in a particularly confusing way.   The X2 cap and 39k resistor are connected right across the triac in a classic snubber configuration, but that isn't immediately obvious from the diagram as drawn.  The 180k is a bleeder resistor to ensure no charge remains on the snubber after power has been removed.

[soldar]

Have a look at this thread and you can reverse engineer the circuit.
https://www.eevblog.com/forum/beginners/pcb-to-scheme/

[Yamin]

Thanks everyone for the response guys. I came across this explanation about Triacs at https://www.nutsvolts.com/magazine/article/triac_principles_and_circuits_part_1
It has got some similarities for the circuit I have drawn. Could this be it?