Is it possible: dimming incandescent lamp with SSR with zero-crossing switching mode

Hi!

I have read different opinions on that but is it even possible to use MCXE240D5 to dim incandescent lamp using microprocessor?

AC line is 230VAC, uC will take care of PWM and syncronizing with AC phase (sinewave) will not be a problem, SSR must be MCXE240D5 and no disturbing flickering is allowed. Of course voltage-driver(ULN2803A) between uC and SSR is used

Some say that it will be ok, some say that only "random fire" will work.

I need to find solution using those specific SSRs.

Is it only possible via good code inside the uC or I should stop dreaming about it?

Thanks to all for answering,

Attributes

Like (0)
Reply

ndtgenieros

Currently Being Moderated

1. Jan 25, 2012 7:00 AM (in response to freddy)
Re: Is it possible: dimming incandescent lamp with SSR with zero-crossing switching mode

Hi,

do you mean that you want to dim an incandescent light bulb with a relay?
If so, why not using triacs or IGBTs?

relays are not designed for dimming, you can get a lot of unexpected problems. I can imagine lot of noise, timing problems, Voltage-peaks extremely high, ... fire ¿?.. who knows!

You may want to use triacs or IGBTs. You will need to include a snuber circuit with an X2 Class Capacitor. There are triacs (BTA class) which include snuber circuit inside the chip. More things... maybe 1mh or 2mh Toroidal in series with the load if you get electromagnetic interferences while dimming. If you have difficult finding a circuit I can search for one that I always use, just let me know.

Regards,

Cristian

Report Abuse

Like (0)

Reply
RWM

Currently Being Moderated

2. Jan 25, 2012 8:55 AM (in response to freddy)
Re: Is it possible: dimming incandescent lamp with SSR with zero-crossing switching mode

MCXE240D5 is zero-crossing version, not designed to dimming. It will switch on load after voltage crosses zero independent on when conrol voltage is set. You need MCXE240D5R version.

Report Abuse

Like (0)

Reply

Go to original post

Legend

Correct Answers - 50 points
Helpful Answers - 25 points

theknode | The Drawer
You have to be logged in to view the content of the Drawer. Please Login or Register.

Jan 7, 2012 6:00 PM

Is it possible: dimming incandescent lamp with SSR with zero-crossing switching mode

Attributes

Actions

Related Content

Related Products

Discussions

Bookmarked By (0)

Legend