Trouble with speed motor control circuit

Thread Starter

jamesle

Joined Sep 20, 2017
3
Hi there,
I'm trying to design a speed motor control circuit. The idea is by controlling each half of the voltage period applying to the load by using an optocoupler - MOC3021 and a triac - BTA06-600b.



The problem is the output of MOC 3021 seems incorrect. The reason is I use pulse source (to simulate output of microprocessor) to control firing angle but the output of MOC 3021 still the same.
Please tell me where is my mistake.
Thanks,
 

Attachments

Thread Starter

jamesle

Joined Sep 20, 2017
3
Sorry, I meant Fairchild AN-3006
Max.

This is the schematic for Phase controlling in AN-3006. It doesn't much differ with my own. I just have the phase control one with a pulse source to simulate micro-controller's output, meanwhile the schematic comes with zero crossing detector using 555 (I think so).
Please correct me if I made mistake!
 

Attachments

MaxHeadRoom

Joined Jul 18, 2013
19,387
I have used virtually the same circuit but a 12F675 micro.
In the app note a bridge and a H11L1 is used for the zero cross detection.
Max.
 
Top