I have an old Marklin crane that uses two 16V AC motors for rotating left/right and raise/lower the hook.
Using an Arduino, an HC11AA1 for Zero-Cross detection and a TRIAC (BT137 driven by a MOC3052), I can use a knockoff Nunchuck to speed control one of the motors in one direction – All well and good.
Now, I need to control the motor in the opposite direction as well as the other motor in both directions. As I see it, I have two options:
1) Control three more TRIACS
2) Use three relays (one for switching between up/down and left/right and one each for up/down and left/right) to distribute the signal from the first TRIAC
The price is roughly the same, but do you see any pros and/or cons of the two options?
Electrical – Controlling AC motor with TRIAC or relay
arduinorelaytriac
Best Answer
One solution (maybe with fewer components): Two TRIACs for individual speed control. Two relays for individual direction reversing. Warning: To avoid problems, the TRIAC must be off and the corresponding motor physically stopped in order to reverse its direction.