Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Triac(BTA12800) failing(Short) when driving 1 ph Ind. motor

Status
Not open for further replies.
G

GM2009

Newbie
Joined
Nov 25, 2009
Messages
4
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
India
Activity points
1,312
In one of my application for driving single phase induction motor, I am using BTA12800 ST make Triac(two for reversing direction).But with this Triac is getting failed (shorted).What could be the possible reason that causing Triac fail?
Please reply anyone knows the reason.
 

You'll find ample sub quality, sub-standared components pushed in the name of reputed brands. Confirm that your device is an original ST make with a laser engraved markings on it.
Also it is mandatory to provide sufficient heatsink to the device when connecting such loads. Also give details about how the "gate" is driven? Also curious to know wether the said circuit is a newly designed/ constucted one or the commercial make which has failed now?
Cheers
 

If it's a capcitor motor, turning both triacs simultaneously on (= not keeping a switchover time) is a nice way to cause pretty high currents and possbly damage the triacs. The current is at least sufficient to cause contactor welding, I've already tried. If you're sure to avoid this particular issue, the regular motor inrush current can be still too high for the part.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top