Help me select elements for controlling heating resistor

Status
Not open for further replies.
N

narc_otic

Member level 1
Joined
Sep 4, 2001
Messages
32
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
140
ac zero-crossing detector

Hi all, i'd like to control some heating resistor (2*5kW per phase), so, up to 6 elements, and control their power.
I was thinking about using per phase:
-zero crossing detector to trigger the PWM output of a µ.
-use the PWM output to drive a TRIAC.

Any reference of zzero crossing detector to use?

I also wonder the kind of filter I would need to avoid noise injection onto the main. Any recommendations

Thanks

Narc
 

Re: AC load switching

Usually heater resistence have a lot of inertia, it's common to drive them in "burst" mode. Whith a zero-cossing triac you let the current flow for n-periods of line voltage (a burst of sinusoidal wave). No needs to syncronize your micro with zero crossing.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…