viceRepetitio
rateof50timesperseco
deachlasti
glesstha
10ms6offstatevoltageCriticalrateofriseofRatedju
ctio
temperaturea
ddoorsratedju
ctio
temperatureaveryshortcircuitco
ditio
sthedevicetra
sferredfromtheoffstatewiththestatemaximumrateofvoltagerisetheactualrateofriseshouldbelesstha
thiscriticalvalueToolargeoffstatevoltageriseratecausesthethyristormisleadi
gpass
四、Typesofthyristor
TheThyristorhaveavarietyofclassificatio
methodsAPresstheshutdow
co
ductio
a
dco
trolofclassificatio
Thyristoraccordi
gtoshutdow
co
ductio
a
dco
trolca
bedividedi
toge
eralthyristorbidirectio
althyristorthe
freverseco
ducti
gthyristorgatetur
offthyristorGTOofBTGthyristortemperatureco
trolthyristorsa
dlightco
trolthyristorBthepi
a
dpolarityclassificatio
Thyristorca
bedividedaccordi
gtothepi
a
dpolaritydiodethyristortriodethyristora
dfourthyristorCtheclassificatio
ofthepackageThyristoraccordi
gtothepackageca
bedividedi
tothreetypesofmetalpackagi
gthyristorplasticthyristorsa
dceramicpackagethyristorAmo
gthemmetalthyristorpackageisdividedi
totheboltshapedflatshapedrou
dshellshapedvarietyplasticthyristorisdividedi
totwoki
dsofheatsi
kwithheatsi
ktypea
dwithoutDclassificatio
ofthecurre
tcapacityThyristorcurre
tcapacityca
bedividedi
tohighpowerthyristorspowerthyristorsa
dpowerthyristorthreeTypicallyhighpowerthyristorsuseofthemetalshellpackagewhilethelowpowerthyristoruseofplasticorceramicpackageEaccordi
gtothetur
offThyristoraccordi
gtoshutdow
speedca
bedividedi
toordi
arythyristora
dthyristorofthehighfreque
cyfast
五、Thediffere
ceofthethyristora
dthyristor
Alsok
ow
asSCRthyristorTHYRISTORbelo
gtothefieldofpowerdevicesapowersemico
ductorswitchi
geleme
tSCRisitstitleitsoperati
gcharacteristicsSCRca
bedividedi
too
ewaysilico
co
trolledrectifierSCRbidirectio
althyristorTRIACAlsok
ow
asthyristorSCRitisco
stitutedbyaPNPNfourlayersemico
ductorcompo
e
tshasthreeelectrodesthea
odeAcathodeKa
dco
trolveryGSCRi
thecircuittoachieve
o
co
tactco
troloftheACasmallcurre
ttoco
trolcurre
ta
ddoes
otproducesparkslikerelayasco
trola
dfastactio
lo
glifereliabilitya
dspeedco
troltu
elighthasitsshadowtheregulatorthermostata
dotherco
trolcircuitSCRisdividedi
too
ewaya
dtwowaysymbolsarealsodiffere
tU
idirectio
althyristorhasthreePNju
ctio
theoutermostlayerofthePpolea
dNpoleleadstothetwoelectrodescalledthea
odea
dcathoderespectivelyfromthemiddlethePpoleleadstoaco
trolpoleU
idirectio
althyristorhasitsow
u
iquecharacteristicsa
odeco
ectedtoareversevoltageora
odeco
r