I'm trying to design a board to control an AC motor with PWM, forward and backward.
Since this is my first time designing an AC circuit, I thought I would get input from the community to make sure I'm not going to fry something.
The DIRECTION
net will switch the relay to control direction of the motor.
The SPEED_PWM
net will be from a 5v microcontroller, which is using an AND logic gate to combine with the ON
net to turn the triac on and off using the MOC3021
.
The AD_IO
net will cause an interrupt in the microcontroller to control the pwm.
The board will also provide 12v out through J3 pin 7.
Is this a decent design? I've tried to keep the DC components on the left side of the board, and the AC components on the right. Is there a simpler design that doesn't rely on the microcontroller interrupt to trigger the triac at the correct times, while still allowing a PWM input?
Thanks for taking the time to help a beginner!
BOM for all parts listed:
https://docs.google.com/spreadsheets/d/1j7ofAEz3RRKm0HdhhkeqTOGNVorD3Ae6vwO6sfPUid0/edit?usp=sharing