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Konverter ac ac (minggu ke 6)
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Konverter ac ac (minggu ke 6)

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penyearah thyristor

penyearah thyristor

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  • 1. Konverter AC-AC Pekik Argo Dahono
  • 2. PenggunaanAC Power SuppliesStabilisator teganganVariable Speed AC DrivesLamp dimmerStatic VAR CompensatorsAC SwitchesSoft Starter
  • 3. Macam Konverter AC-ACDirect AC-AC Voltage ConvertersCycloconvertersIndirect AC-AC Converters:- DC Link- AC LinkMatrix Converters
  • 4. Direct AC-AC Voltage ConvertersKomponen utama:- TRIAC T1- Antiparallel connected is io two thyristors +Teknik kendali:- Integral cycle vs T2 R vo- Phase control
  • 5. Integral cycle controlAlmost no transient orEMI problemsCan only be used forapplications with large vs“inertia”.The control ratio is volimited.
  • 6. Phase-Controlled AC-AC Voltage Converters : Resistive LoadInput voltage issinusoidal. is T1 io +Output voltage and vs T2 R vocurrent waveformsare the same. vs isInput and outputcurrent waveforms αare the same. vo ioPower factor is lessthan unity.
  • 7. Phase-Controlled AC-AC Voltage Converters : Resistive LoadTegangan output : ⎡ π − α + 1 sin 2α ⎤ 1/ 2 2Vs2 πVo = ∫α sin θdθ = Vs ⎢ 2 2 π π ⎥ ⎣ ⎦ VoI s = Io = RVA sumber :VAs = Vs I sDaya Beban :P = Vo I o = Vo2 / RFaktor Daya : ⎡ π − α + 1 sin 2α ⎤ 1/ 2PF = P / VAs = ⎢ 2 ⎥ ⎣ π ⎦
  • 8. Phase-Controlled AC-AC Voltage Converters : Inductive LoadOutput voltage and T1current waveforms + is ioare different. vs T2 R vo LOutput and inputcurrent waveforms vs isare the same.Source power factor α vo iois less than the loadpower factor.
  • 9. Three-Phase AC-AC Voltage Converters : Resistive Loads va vb vc va T1 ia iA vAN + A n R T2 vb T3 iB vB + B R vab T4 vc T5 iC vC + C R T6
  • 10. Three-Phase AC-AC Voltage Converters : Resistive Loadsva vb vc va vb vcia ia vab
  • 11. AC Choppers is io S1 + eses S2 vo Load vo
  • 12. Single-Phase Cycloconverters is io is +vs Load vo vs positive negative α p +αn = π
  • 13. Three-Phase to Three-Phase Cycloconverters Sumber 3 - fasa Motor 3 - fasa
  • 14. DC Link AC-AC ConvertersAC source AC load Voltage - Type Voltage - Type Rectifier InverterAC source AC load Current - Type Current - Type Rectifier Inverter
  • 15. AC Link AC-AC Converter AC source AC load Voltage - Type Voltage - Type Rectifier InverterAC source AC load Current - Type Current - Type Rectifier Inverter
  • 16. AC-Link AC-AC Convertersvsvo
  • 17. Matrix Converters S1 is io euo S1 S2 S2 u u + S3es vo Load evo S4 S3 v S5 v 0 n S6 S4 ewo S7 w S8 w S9
  • 18. PWM Technique for Single-Phase Matrix Converter ⎛ 2T ⎞e e r v uo = ⎜ ON 1 − 1⎟ s = s v u ⎜ T ⎟ 2 ⎝ s ⎠ 2 ⎛ 2T ⎞e e r + S2 v vo = ⎜ ON 2 − 1⎟ s = s v v ⎜ T ⎟ 2 S1 ⎝ s ⎠ 2 voes u v e 2 (r r ) e r v uv = s v u − v v = s v uv 2 Let e s = V s sin ω s t and v uv = Vo sin ω o t Load Then S3 S4 2Vo sin ω o t v uv = r V s sin ω s t with ω o < ω s