Surge protection system for a d-c power supply during power-up

Details Surge protection system for a d-c power supply during power-up Surge protection system for a d-c power supply during power-up

1984-01-26

1986-02-25

Beha, Jr., William H.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 37, 363 49, 363 53, H02M 706

Patent

active

045731136

ABSTRACT:
Surge protection is provided for a d-c power supply, wherein rectified a-c line voltage is filtered in an LC filter having a shunt-connected filter capacitor, by inserting a limiting resistor in series with the filter capacitor during power-up to reduce the inrush current and the voltage overshoot to acceptable values. Once the power-up period is over and d-c power is fed to a load, the limiting resistor is bypassed.

REFERENCES:
patent: 3631332 (1971-12-01), Williamson
patent: 3824441 (1974-07-01), Heyman et al.
patent: 4409647 (1983-10-01), Terkanian

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