13 Threads found on edaboard.com: Triac Protection
i am making a small project where i need to just ON and OFF 3000W heater using a triac and 89S52.
attaching a circuit diagram. Kindly request you to please check the circuit and components and let me know if any changes have to be made.
as i need to play with high current, so before putting it into use i need to reconfirm and check if
Microcontrollers :: 02-17-2017 05:07 :: gauravkothari23 :: Replies: 7 :: Views: 279
I am Avradip .I am studying a sample motion detection circuit which uses PIR sensor D203S and motion detetor IC BISS0001.The output of sensor directly connected to BISS0001 and after several stage of amplification it gives output(Vo) which switches SCR. SCR switches triac which is used for general purpose ac switching.But i didnt understood th
Power Electronics :: 10-01-2016 05:25 :: Avradip :: Replies: 3 :: Views: 370
Dear Friends I need to control 30 or 40 Hp Motor through SCR (triac's) Is it Possible ? If possible wich type of triac's I want to use I am getting till up 40 Amp supported Traic's only I need 100 Amp supported triac Please suggest me
Hobby Circuits and Small Projects Problems :: 04-25-2015 11:38 :: sribangaram :: Replies: 3 :: Views: 604
As you know, all switch mode mains LED light bulbs need protection from the overvoltages that may occur if they are accidentally connected to a triac dimmer.
Given that such circuits are usually dissipative dampers, would it be acceptable, as an alternative, to simply sense the DC bus voltage with a potential divider, and if it gets too great, th
Elementary Electronic Questions :: 12-06-2013 16:54 :: treez :: Replies: 5 :: Views: 498
check the snubber ckt. there is a snubber for triac and MOC3021 and combiled with gate protection. ref MOC3021 datasheet.
Microcontroller initialization should happern without any initial delay.
Microcontrller may get reset during mains ON/OFF. Due to EMI/EMC. u can chaeck that.
Trigger signal I/P event may get triggered during mains ON/OFF.
Power Electronics :: 04-22-2013 11:01 :: jpsganesh :: Replies: 3 :: Views: 890
I have a lot of questions :-D
What are the things to keep in mind if I want to switch a computer smps (230Vrms, 50Hz and 3 amp) using an optobased triac? please suggest some links. also the triac should be able to take direct inputs from an mcu (i am using the atmega 8). is there any protection required in between the (...)
Hobby Circuits and Small Projects Problems :: 03-20-2012 17:13 :: bishshoy007 :: Replies: 2 :: Views: 1105
Is there any difference when using a SCR or triac in a 13,8Vcc crowbar circuit overvoltage protection? I mean triger voltage, action time, short circuit current capacity, RF imunity, size, power dissipation, etc...
Fernando - PU2PLL - BRAZIL
Power Electronics :: 12-04-2010 11:07 :: fjpompeo :: Replies: 0 :: Views: 2232
We finished talking about this circuit on the other website.
It has too many errors such as the diodes and triac connected wrong.
Hobby Circuits and Small Projects Problems :: 04-06-2010 04:34 :: Audioguru :: Replies: 2 :: Views: 2227
Because an SCR is not a symmetric device (NPNP != PNPN).
A triac is a bidirectional SCR pair that can / must be triggered
in the appropriate direction.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 01-25-2010 20:38 :: dick_freebird :: Replies: 4 :: Views: 2302
RC snubber is for filtering voltage spikes, it won't do anything to limit in rush current.
What you need is a suitably sized choke in series of your triac
For example a toroid wound with wire.
Analog Circuit Design :: 11-22-2009 04:07 :: xaccto :: Replies: 3 :: Views: 2604
As shown in the attachment in the link, a motor control circuit in which a surge current protection circuit is included.
Basically, the motor speed is controlled by changing the value of the variable resistor "R4", different value of R4 will trigger the diac and triac at different volt
Elementary Electronic Questions :: 05-30-2008 09:04 :: eepty :: Replies: 2 :: Views: 1115
As shown in the attachment, a motor control circuit in which a surge current protection circuit is included.
Basically, the motor speed is controlled by changing the value of the variable resistor "R4", different value of R4 will trigger the diac and triac at different voltage level. It is also called phase control.
However, I do not underst
Analog Circuit Design :: 05-30-2008 09:03 :: eepty :: Replies: 9 :: Views: 1952
Sense a zero cross @ rated frequency
as long as you have a active cross enable a triac to feed AC.
Professional Hardware and Electronics Design :: 01-10-2003 18:36 :: GrimReaper :: Replies: 2 :: Views: 1783