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Konverter ac ac (minggu ke 6)
The document discusses various types of AC-AC converters used to convert alternating current (AC) power from one voltage or frequency to another. It describes direct AC-AC converters using thyristors in integral cycle control or phase control configurations. It also discusses indirect AC-AC converters using a DC link or AC link, as well as cycloconverters, three-phase converters, choppers, and matrix converters. Pulse width modulation techniques are used to control the output of single-phase matrix converters.
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Konverter ac ac (minggu ke 6)
- 1. Konverter AC-AC Pekik Argo Dahono
- 2. Penggunaan AC Power Supplies Stabilisatortegangan Variable Speed AC Drives Lamp dimmer Static VAR Compensators AC Switches Soft Starter
- 3. Macam Konverter AC-AC DirectAC-AC Voltage Converters Cycloconverters Indirect AC-AC Converters: - DC Link - AC Link Matrix Converters
- 4. Direct AC-AC VoltageConverters Komponen utama: - TRIAC T1 - Antiparallel connected is io two thyristors + Teknik kendali: - Integral cycle vs T2 R vo - Phase control
- 5. Integral cycle control Almostno transient or EMI problems Can only be used for applications with large vs “inertia”. The control ratio is vo limited.
- 6. Phase-Controlled AC-AC Voltage Converters : Resistive Load Input voltage is sinusoidal. is T1 io + Output voltage and vs T2 R vo current waveforms are the same. vs is Input and output current waveforms α are the same. vo io Power factor is less than unity.
- 7. Phase-Controlled AC-AC Voltage Converters : Resistive Load Tegangan output : ⎡ π − α + 1 sin 2α ⎤ 1/ 2 2Vs2 π Vo = ∫α sin θdθ = Vs ⎢ 2 2 π π ⎥ ⎣ ⎦ Vo I s = Io = R VA sumber : VAs = Vs I s Daya Beban : P = Vo I o = Vo2 / R Faktor Daya : ⎡ π − α + 1 sin 2α ⎤ 1/ 2 PF = P / VAs = ⎢ 2 ⎥ ⎣ π ⎦
- 8. Phase-Controlled AC-AC Voltage Converters : Inductive Load Output voltage and T1 current waveforms + is io are different. vs T2 R vo L Output and input current waveforms vs is are the same. Source power factor α vo io is less than the load power factor.
- 9. Three-Phase AC-AC VoltageConverters : Resistive Loads va vb vc va T1 ia iA vA N + A n R T2 vb T3 iB vB + B R vab T4 vc T5 iC vC + C R T6
- 10. Three-Phase AC-AC VoltageConverters : Resistive Loads va vb vc va vb vc ia ia vab
- 11. AC Choppers is io S1 + es es 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-ACConverters AC source AC load Voltage - Type Voltage - Type Rectifier Inverter AC source AC load Current - Type Current - Type Rectifier Inverter
- 15. AC Link AC-ACConverter AC source AC load Voltage - Type Voltage - Type Rectifier Inverter AC source AC load Current - Type Current - Type Rectifier Inverter
- 16.
- 17. Matrix Converters S1 is io euo S1 S2 S2 u u + S3 es vo Load evo S4 S3 v S5 v 0 n S6 S4 ewo S7 w S8 w S9
- 18. PWM Technique forSingle-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 vo es 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