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paper capacitor การใช้

ประโยคมือถือ
  • These paper capacitors were similar to Robert Sprague's original patent.
  • Historically, the first  film type capacitors were paper capacitors of film / foil configuration.
  • These mostly large PP film or metallized paper capacitors are limited by the rated reactive power VAr.
  • Other types include metallized paper capacitors ( MP capacitors ) and mixed dielectric film capacitors with polypropylene dielectrics.
  • Capacitors for AC applications are primarily film capacitors, metallized paper capacitors, ceramic capacitors and bipolar electrolytic capacitors.
  • PCB-filled paper capacitors are found in very old ( pre-1975 ) fluorescent lamp ballasts, and other applications.
  • Over the years, these paper capacitors often become leaky, and could allow sufficient current flow to give the user a shock.
  • Capacitors, especially ceramic capacitors, and older designs such as paper capacitors, can absorb sound waves resulting in a microphonic effect.
  • One of the great advantages of plastic films for capacitor fabrication is that plastic films have considerably fewer defects than paper sheets used in paper capacitors.
  • This allows the manufacture of plastic film capacitors with only a single layer of plastic film, whereas paper capacitors need a double layer of paper.
  • However, some types of metallized paper capacitors ( MP ) are still used for this application, because they still have some advantages in flame resistance.
  • Plastic film capacitors were significantly smaller in physical size ( better volumetric efficiency ), with the same capacitance value and the same dielectric strength as comparable paper capacitors.
  • Since around 1980, paper and metallized paper capacitors ( MP capacitors ) have almost completely been replaced by PET film capacitors for most low-power DC electronic applications.
  • A broad black band was applied to some tubular paper capacitors to indicate the end that had the outer electrode; this allowed this end to be connected to chassis ground to provide some shielding against hum and noise pickup.