SCR... main circuit of VFD
SCR... main circuit of VFD
(OP)
hello folks..
1.)what are the other solid state device used to protect the SCRs(silicon-controlled rectifier)? aside for surge protectors and diodes.
2.) what makes up the surge protectors, its operating characteristices and protection features to the SCRs?
3.) is surge protectors that is used in SCRs is the same with the surge protectors used in rotatry exciter of ac generator which is connected in parallel with the dc output?
4.)in SCR protections, How can we matched the rating of SCR with diodes? does we need to refer in operating characteristic of the SCR with its reverse voltage breakdown, so with the forward bias voltage of diodes?
any suggestions or recommendations for websites with regards to SCRs protection?
thank you very much..
regards
fbjavier
1.)what are the other solid state device used to protect the SCRs(silicon-controlled rectifier)? aside for surge protectors and diodes.
2.) what makes up the surge protectors, its operating characteristices and protection features to the SCRs?
3.) is surge protectors that is used in SCRs is the same with the surge protectors used in rotatry exciter of ac generator which is connected in parallel with the dc output?
4.)in SCR protections, How can we matched the rating of SCR with diodes? does we need to refer in operating characteristic of the SCR with its reverse voltage breakdown, so with the forward bias voltage of diodes?
any suggestions or recommendations for websites with regards to SCRs protection?
thank you very much..
regards
fbjavier





RE: SCR... main circuit of VFD
RE: SCR... main circuit of VFD
hello folks..
1.)what are the other solid state device used to protect the SCRs(silicon-controlled rectifier)? aside for surge protectors and diodes.
///Potentially, thermal protection by solid state thermal detectors, solid state fuses, etc.\\\
2.) what makes up the surge protectors, its operating characteristices and protection features to the SCRs?
///Surge protectors have to dissipate energy of the surge pulse.\\\
3.) is surge protectors that is used in SCRs is the same with the surge protectors used in rotatry exciter of ac generator which is connected in parallel with the dc output?
///Most likely, it is not, although the intent of the surge protection is the same.\\\
4.)in SCR protections, How can we matched the rating of SCR with diodes?
///Current ratings, voltage ratings, ambient temp rating, etc.\\\
does we need to refer in operating characteristic of the SCR with its reverse voltage breakdown, so with the forward bias voltage of diodes?
///It depends.\\\
any suggestions or recommendations for websites with regards to SCRs protection?
///Visit:
http://www.intersil.com/data/an/an9/an9842/an9842.pdf
etc. for more info\\\