Daiichi Electronics ASY-96 - Operating Explanation

ASY‑206‑077
22
10.2Operatingexplanation
(1)Frequencycontrol(Governorincreaseoutput,governordecreaseoutput)
Busvoltageinput(V B )andgeneratorvoltageinput(V G )areinputintofrequencydetectingcircuit
throughwave‑formadjustingcircuitanddividingcircuit,afterisolationbyaVT.
Inthefrequencydetectingcircuit,ACcycleiscountedandfedintodatabusandthefrequencyis
calculatedbysoftoperation(1/cycle).
Governorcontrolpulseisoutput,sothatfrequencydifferencebecomeswithinthesettingvalue
(±ΔF)bythemeasuredbusfrequencyandgeneratorfrequency.
Incaseofbusfrequency(F
B )＞generatorfrequency(FG),governorincreasepulse(15R)isoutput.
Incaseofbusfrequency(F
B )＜generatorfrequency(FG),governordecreasepulse(15l)isoutput.
Ifafrequencydifferenceiswithinsetvalue(±△F),anoutputstops.And,itislightedofLED
of△F(insideofsetvalue).
(2)Voltagecontrol(Voltageincreaseoutput,voltagedecreaseoutput)
Busvoltageinput(V
B )andgeneratorvoltageinput(V G )areinputintovoltagedetectingcircuit
afterisolationbyVT.Inthevoltagedetectingcircuit,effectivevalue(RMSvalue)ofACvoltage
ismeasuredandfedintodata‑busafterA/Dconversion.
Thevoltagecontrolpulseisoutput,sothatthevoltagedifferencebecomeswithinthesettingvalue
(±ΔV)bythemeasuredbusvoltageandgeneratorvoltage.
Incaseofbusvoltage(V
B )＞generatorvoltage(V G ),voltageincreasepulse(60R)isoutput.
Incaseofbusvoltage(V
B )＜generatorvoltage(V G ),voltagedecreasepulse(60L)isoutput.
Ifavoltagedifferenceiswithinsetvalue(±△V),anoutputstops.And,itislightedofLEDof
△V(insideofsetvalue).
(3)±15°output
±15°outputismeasuredfromtheACsignalshapedinwaveform.Phasedifferenceismeasuredbythe
pulsewidthfromabusvoltage(V
B )input(voltagezerocrosspoint)toageneratorvoltage(V G )input
(voltagezerocrosspoint).
Ifphasedifferenceis±15°ofasynchronizingpoint,acontactsignal(±15°)isoutputted.
And,itissimultaneouslylightedofLEDof±15°.
(4)25output
25outputscountthemeasuredpulsewidthandincorporateitonadatabus.Theattainmenttimeto
asynchronizingpointiscalculatedbysoftoperation{(pulsewidth/period)×(1/frequencydifference)}.
Ifthefrequencydifference△Fandvoltagedifference△Varewithinsetvalue,andifphasedifference
iswithin±15°,ifinagreementwiththeadvancetime(25T)whentheattainmenttimetoasynchronizing
pointwassetbeforehand,aninputsignal(25)isoutputted.And,itissimultaneouslylightedofLED
of25.
(5)Controlinput
Controlinputisnovoltagecontactinput.DC12V,10mAissuppliedfromtheinternalofthedevice.
Thecontrolinputisfedtodata‑busbeingisolatedbyphoto‑coupler.
(6)Powersupply
Powersupplyissuppliedfrombusvoltageandsuppliedtothecircuitaftervoltageisstabilizedat5V,
±8V,12VisolatedbyVT.