By Topic

Interpretation of short-circuit discharge current in film capacitors based on an equivalent circuit

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Miyairi, K. ; Dept. of Electr. & Electron. Eng., Shinshu Univ., Nagano, Japan ; Morimitsu, N.

Misfire phenomena in a discharge circuit composed of a capacitor and thyristor were investigated for operating frequencies to 198 Hz. Misfire was found to occur in polyethylene terephthalate (PET) capacitor circuits at low temperatures, whereas polypropylene (PP) capacitor circuits did not misfire under any conditions. Transient currents in the range 1 mA to 40 A were measured using a digital oscilloscope. A PET capacitor was shown to discharge initially with a given time constant, but subsequently discharge at a lower rate, extending the discharge period. It is this delayed gradual decay that causes misfire, and it is associated with residual charges trapped in the bulk of the PET film. The correlation between the transient discharge current and dielectric dispersion in PET and PP capacitors was investigated over a wide frequency range with the aid of the Debye model for dipolar polarization. It was found that the time dependence of the discharge current is related closely to the broad distribution of dipole relaxation time, with a discrepancy between the discharge current and the dielectric response attributed to charge trapping

Published in:

Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:8 ,  Issue: 6 )