Current limiter device

Details Current limiter device Current limiter device

1997-03-20

1998-08-18

Leja, Ronald W.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

361 58, 361111, 338 55, 338 22R, H02H 504

Patent

active

057965684

ABSTRACT:
A reversible short circuit current limiter which has at least one PTC thermistor connected in parallel with a shunt impedance branch, and is connected in series with at least one capacitor or a capacitor bank of the DC intermediate circuit. The short circuit current limiter may be arranged in the DC intermediate circuit or in the current convertor. A diode may be connected in the reverse-bias direction of a short circuit path in parallel with the PTC thermistor. The shunt impedance branch has a varistor connected in series with an ohmic resistor or a PTC thermistor and, if appropriate, an inductor. Structures of metal-based nonblocking PTC thermistors are specified.

REFERENCES:
patent: 3654580 (1972-04-01), Laisi
patent: 3996447 (1976-12-01), Bouffard et al.
patent: 4271446 (1981-06-01), Comstock
patent: 4420739 (1983-12-01), Herren
patent: 4816958 (1989-03-01), Belbel et al.
patent: 5296996 (1994-03-01), Hansson et al.
"Thermally Conductive Aluminium Nitride-Filled Epoxy Resin", Bujard and Ansermet, Fifth IEEE Semi-Therm Symposium, 1989, pp. 126-130 No Month.

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