• DocumentCode
    922635
  • Title

    Zero-voltage detection in thyristor and triac convertors

  • Author

    Davis, R.M. ; Downing, B.R.

  • Author_Institution
    University of Nottingham, Department of Electrical & Electronic Engineering, Nottingham, UK
  • Volume
    9
  • Issue
    12
  • fYear
    1973
  • Firstpage
    267
  • Lastpage
    268
  • Abstract
    A sensitive voltage (zero-crossing) detector for a thyristor/triac is described. An optically coupled isolator (o.c.i.) has its light-emitting diode supplied from a constant-current source, and a pair of transistors bypass this current when there is sufficient voltage across the power device. The pulse output of the o.c.i. is sufficiently sharp to drive the logic circuit directly.
  • Keywords
    detectors; light emitting diodes; optoelectronic devices; power convertors; thyristor applications; LED; logic circuit; optically coupled isolator; thyristor; triac convertors; zero voltage detection;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el:19730194
  • Filename
    4236138
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=922635