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+--- Wątek: Dimmer with PWM & MOC & BTA (/showthread.php?tid=564)
Dimmer with PWM & MOC & BTA - vesteve - 02-19-2015
Hello,
I am wanting to develop a Dimmer controlled by PWM. (Sorry, Other more ....) with the Lan Controler
It will have to control a fan 3/4 HP 220vAC
The Pwm what LK gives me can be regulated from 2.6 kHz to 4 MHz and the cycle or width of 0-100%, as you know LK
After much searching on the internet and laboratory tests, I have do to associate circuit.
The circuit operates at some level is switched on and off, etc ....
But I have NO regulation ..... That is not working as dimmer, but as switch.
I tested at different frequencies at different pulse width, etcccc .... No varies. Change the parameters but only makes On / Off
MOC 3020 is not shown in the drawing
If someone can help Thanks ,,,,,,
NOTE:
It occurs to me that the PWM input signal is not strong enough to drive the MOC in all the way and is therefore certain frequencies and wide, then the circuit to operate as a switch (to saturate).
It can be? ....... How do I fix? With a PC817 you perhaps?
If I change the circuit by one normal manual of Diac / Triac with potentiometer, this works great with the engine.
Someone who can help ..... Thanks