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LEKSION 11
SHNDERRUESAT STATIK DC-AC
INVERTERAT TREFAZORE
PUNOI: MSC. ERISON BALLASHENI
VSI (voltage-
source
Inverter)
Nje-fazore Tre-fazore
Shnderruesat
AC-DC
CSI (Current-
source
Inverter)
Skema ure me
nje alternence
Skema ure me dy
alternenca
120
180
Teknikat per Rregullimin e tensionit nё invertor
INVERTER TREFAZORE
• Konvertues DC-AC
• Fuksioni–Perdoret per aplikimet qe kerkojne fuqi
te larte
• Perdorim te gjere ne industry
• Me nje alternance ose me dy alternance si ne
figure
180 VS 120
ANALIZA PER 120
Per kohezgjatjen nga
0 ne 60  T1 dhe T6
ON
Per kohezgjatjen nga 60
ne 120  T1 dhe T2
ON
Per kohezgjatjen nga 120 ne 180
 T2 dhe T3 ON
KRONOGRAMAT PER 120
SHEMBULL
• Ç1, Ç2.. Ç6 çelёsat e pёrgjithёsuar dhe ZA,
ZB dhe ZC rezistencat e plota fazore.
• Nё kёta lloj shndёrruesish statikё
realizohen dy lloje komandash :
• tё tipit 120 °
• tё tipit 180 °
• çdo çelёs qёndron i kyçur pёrkatёsisht 120
° dhe 180 °
KRONOGRAMA PER 120
Ne figurёn me ngjyrё jeshile paraqiten kronogramat pёr
rastin kur ngarkesa nё dalje ёshtё aktive (Zi = R) dhe me
ngjyrё tё kaltёr janё kronogramat pёr rastin kur ngarkesa
ka karakter aktivo-induktiv (Zi = R + jX) . Nё rastin kur
ngarkesa ёshtё simetrike mund tё shkruhet:
vAN, vBN, vCN
vAN, vBN, vCN
KRONOGRAMA
PER RASTIN E
SHNDERRUESIT
AKTIV
KRONOGRAMA PER 180
ZA=ZB=ZC=Z.
Format e valёve tё tensionit tё
SHSV-A pёr rastin e
ngarkesёs aktive: Z=R
KONTROLLI I TENSIONIT NE INVERTER
• Ne disa aplikimi kerkohet qe te kontrollohet tensioni ne dalje te
inverterit, ose te rregullohet tensioni ne inverter.
• Ka disa teknika qe perdoren
• Me e perdorura eshte teknika PWM (pulse width modulation)
• SPWM = Single Pulse Width Modulation
• MPWM = Multiple Pulse Width Modulation
• Sinusoidal Pulse Width Modulation
MODULIMI NЁ GJЁRESI TЁ IMPULSIT-PWM
Tensioni nё dalje ka formёn e treguar nё
figurёn e mesiperme.
Strategjia mё e pёrdorur sot pёr kontrolloin e
harmonikave tё sinjalit nё ngarkesё Multiple PWM
MODULIMI SINUSOIDAL NЁ FAZЁ
MODULIMI SINUSOIDAL I SFAZUAR
ZBATIME - UPS

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Leksion 11- elektronike fuqie.pptx

  • 1. LEKSION 11 SHNDERRUESAT STATIK DC-AC INVERTERAT TREFAZORE PUNOI: MSC. ERISON BALLASHENI
  • 2. VSI (voltage- source Inverter) Nje-fazore Tre-fazore Shnderruesat AC-DC CSI (Current- source Inverter) Skema ure me nje alternence Skema ure me dy alternenca 120 180 Teknikat per Rregullimin e tensionit nё invertor
  • 3. INVERTER TREFAZORE • Konvertues DC-AC • Fuksioni–Perdoret per aplikimet qe kerkojne fuqi te larte • Perdorim te gjere ne industry • Me nje alternance ose me dy alternance si ne figure
  • 5. ANALIZA PER 120 Per kohezgjatjen nga 0 ne 60  T1 dhe T6 ON Per kohezgjatjen nga 60 ne 120  T1 dhe T2 ON Per kohezgjatjen nga 120 ne 180  T2 dhe T3 ON
  • 7. SHEMBULL • Ç1, Ç2.. Ç6 çelёsat e pёrgjithёsuar dhe ZA, ZB dhe ZC rezistencat e plota fazore. • Nё kёta lloj shndёrruesish statikё realizohen dy lloje komandash : • tё tipit 120 ° • tё tipit 180 ° • çdo çelёs qёndron i kyçur pёrkatёsisht 120 ° dhe 180 °
  • 8. KRONOGRAMA PER 120 Ne figurёn me ngjyrё jeshile paraqiten kronogramat pёr rastin kur ngarkesa nё dalje ёshtё aktive (Zi = R) dhe me ngjyrё tё kaltёr janё kronogramat pёr rastin kur ngarkesa ka karakter aktivo-induktiv (Zi = R + jX) . Nё rastin kur ngarkesa ёshtё simetrike mund tё shkruhet: vAN, vBN, vCN vAN, vBN, vCN
  • 10. KRONOGRAMA PER 180 ZA=ZB=ZC=Z. Format e valёve tё tensionit tё SHSV-A pёr rastin e ngarkesёs aktive: Z=R
  • 11. KONTROLLI I TENSIONIT NE INVERTER • Ne disa aplikimi kerkohet qe te kontrollohet tensioni ne dalje te inverterit, ose te rregullohet tensioni ne inverter. • Ka disa teknika qe perdoren • Me e perdorura eshte teknika PWM (pulse width modulation) • SPWM = Single Pulse Width Modulation • MPWM = Multiple Pulse Width Modulation • Sinusoidal Pulse Width Modulation
  • 12. MODULIMI NЁ GJЁRESI TЁ IMPULSIT-PWM Tensioni nё dalje ka formёn e treguar nё figurёn e mesiperme. Strategjia mё e pёrdorur sot pёr kontrolloin e harmonikave tё sinjalit nё ngarkesё Multiple PWM