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Metody modulacji szerokości impulsu z widmem rozproszonym by Lavanya, S. Nithya

Metody modulacji szerokości impulsu z widmem rozproszonym

by S. Nithya Lavanya
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Book cover type: Paperback
  • ISBN13: 9786208611644
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Wydawnictwo Nasza Wiedza
  • Publisher Imprint: Wydawnictwo Nasza Wiedza
  • Publication Date:
  • Pages: 160
  • Original Price: USD 91.0
  • Language: Polish
  • Edition: N/A
  • Item Weight: 223 grams
  • BISAC Subject(s): Electronics / General

W ostatnich latach falowniki napięcia z modulacją szerokości impulsu (PWM-VSI) stają się popularne w zastosowaniach z napędami o zmiennej prędkości ze względu na wewnętrzną kontrolę zarówno napięcia, jak i częstotliwości w falowniku. W celu regulacji zarówno napięcia, jak i częstotliwości, opracowano różne metody PWM dla napędów zasilanych VSI. Aby wygenerowac wzór impulsu dla napędów zasilanych przez VSI, istnieją glównie dwa podejścia, a mianowicie podejście cyfrowe (podejście wektora przestrzennego) i podejście porównania nośnych. W podejściu cyfrowym czasy przelączania są obliczane i podawane do liczników, które generują momenty przelączania. Natomiast w podejściu porównywania nośnych, sygnal referencyjny lub modulujący będzie porównywany z sygnalem nośnym (zwykle trójkątnym), a następnie punkty przecięcia decydują o momentach przelączania dla urządzeń falownika. Spośród tych dwóch podejśc metoda porównywania nośnych zyskuje na znaczeniu ze względu na prostszą implementację.

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