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DC-AC Inverter

DC-AC Inverter. Elektronika Daya Rahmat A. Al hasibi. DC to AC inverters (1). Menghasilkan tegangan beban AC dari sebuah sumber DC Komponen DC to AC inverters dapat berupa : Transistor BJT Thyristor MOSFET Dll Pemilihan komponen switching bergantung pada : Kebutuhan rating

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DC-AC Inverter

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  1. DC-AC Inverter ElektronikaDaya Rahmat A. Al hasibi

  2. DC to AC inverters (1) • Menghasilkanteganganbeban AC darisebuahsumber DC • Komponen DC to AC inverters dapatberupa: • Transistor BJT • Thyristor • MOSFET • Dll • Pemilihankomponenswitching bergantungpada: • Kebutuhanrating • Kemudahandalamprosesondanoff • Bentuktegangan AC inverter padadasarnyaadalahgelombangkotak • Denganmetode PWM, dapatdigunakanuntukmengurangi harmonic danmenghasilkanbentukgelombang quasi-sinus

  3. DC to AC inverters (2) • Untukmenghasilkantegangan AC yang lebihtinggidibutuhkantegangan DC yang lebihtinggi pula, • Dalamhalini inverter memerlukantransformatorstep-up • Frekuensitegangan AC inverter dapatdikendalikan, • Yaitudenganmengaturwaktuondanoffkomponenswitching yang digunakan

  4. HALF-BRIDGE WITH RESISTIVE LOAD (1) • Vp1dan Vp2merupakanpulse generator, • Vp1menghasilkanpulsaperiodiksetiap T, • Vp2menghasilkanpulsaperiodik yang tertundasejauh T/2

  5. HALF-BRIDGE WITH RESISTIVE LOAD (2) • Frekuensi inverter, • Tegangan RMS beban, • Dimana

  6. HALF-BRIDGE WITH RESISTIVE LOAD (3) • Contoh: • Sebuah inverter memiliki Vb1 = Vb2 = 20 volt. Bebanmerupakansebuah resistor sebesar 10 Ohm. Frekuensi inverter adalahsebesar 100 Hz. Gambarkanbentukgelombangarusdibebandantentukandisipasidayapadabebantersebut !!!

  7. HALF-BRIDGE INVERTER WITH RESISTIVELOAD AND CAPACITIVE ELEMENTS (1) • Kapasitormenggantikancenter-tapped battery, • Sumber DC merupakan battery tunggal • C1dan C2diisisebelumprosesswitching • Masing-masingdiisidengantegangansebesarVb/2 • Padasaat Q1 on, dan Q2 off, tegangan C1dikenakanpadabeban • Padasaat Q1 off dan Q2 on, tengangan C2dikenakanpadabeban

  8. HALF-BRIDGE INVERTER WITH RESISTIVELOAD AND CAPACITIVE ELEMENTS (2) • Contoh: • Sebuah inverter denganelemenkapasitormemilikiVb = 40 volt. C1 = C2 = 200F. R bebansebesar 10 Ohm danfrekuensi inverter sebesar 100 Hz. Tentukanteganganmaksimumdan minimum denganmenganggapbentukgelombangsimeterisdanswitching ideal !!!

  9. HALF-BRIDGE WITH PURELY INDUCTIVELOAD (1) • Untuk inverter denganbebanresistifmurni, padasaat Q1 off dan Q2 on, • Arusbebanberubahseketikadariarusbebanmaksimumkearusbeban minimum • Inverter denganbebaninduktifmurni, pembalikanarusdantegangan inverter secaraseketikatidakmungkinterjadi

  10. HALF-BRIDGE WITH PURELY INDUCTIVELOAD (2) • Q1 on: • Padasaat t=T/2, i(t) = +Io, maka • Q2 on: • t=T/2 setelahswitching, i(t) = -Io, maka

  11. HALF-BRIDGE WITH AN R-L LOAD • Q1 on: • Padaakhirsetengahsiklus, t = T/2 dani(t) = Io, • Q2 on:

  12. FULL-WAVE BRIDGE INVERTER

  13. Three-Phase Voltage SourceInverters

  14. Inverter Motor Control Using the 8xC196MC Microcontroller (1)

  15. Inverter Motor Control Using the 8xC196MC Microcontroller (2)

  16. Inverter Motor Control Using the 8xC196MC Microcontroller (3)

  17. Inverter Motor Control Using the 8xC196MC Microcontroller (4)

  18. Inverter Motor Control Using the 8xC196MC Microcontroller (5)

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