Short-circuit protection device for an electrical machine fed by

Details Short-circuit protection device for an electrical machine fed by Short-circuit protection device for an electrical machine fed by

1989-03-08

1989-12-26

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

361 20, 361 58, 361 93, 318762, 363 56, H02H 708

Patent

active

048901814

ABSTRACT:
A short-circuit protective device for a motor-driven and generator-driven electrical machine fed by a pulse-controlled a.c. converter has reverse-parallel circuitry that is switching dependent on a monitoring device. The monitoring device detects short circuits and is provided in a d.c. current supply line. Using the reverse-parallel circuitry and the monitor, an intermediate circuit capacitor of the pulse-controlled a.c. converter feeding the machine is isolated from the short circuit location.

REFERENCES:
patent: 4410926 (1983-10-01), Hafner et al.
patent: 4410935 (1983-10-01), Dang
patent: 4434393 (1984-02-01), Kobari et al.
patent: 4521724 (1985-06-01), Sakamato et al.

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