Overload and short circuit protection device for a power semicon

Details Overload and short circuit protection device for a power semicon Overload and short circuit protection device for a power semicon

1997-04-28

1998-11-03

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 87, 361 94, 361100, 363 58, 363 76, H02H 300

Patent

active

058318070

ABSTRACT:
An overcurrent and short circuit protection device for a power semiconductor component is responsive to output current signals representing the actual output current(s) of the semiconductor component. A short-circuit window comparator receives the output current signals and produces an error signal when the sum of all output current signals is less than a minimum allowable value or more than a maximum allowable value. An overcurrent window comparator receives the same output current signals, determines a positive maximum instantaneous value and a negative maximum instantaneous value, and produces an error signal when either one of these exceeds a maximum allowable value. An error signal from either window comparator interrupts operation of the power semiconductor component and locks out all higher level control signals to the power semiconductor component.

REFERENCES:
patent: 4410935 (1983-10-01), Dang
patent: 4475150 (1984-10-01), D'Atre et al.
patent: 4586118 (1986-04-01), Mihalka
patent: 5280228 (1994-01-01), Kanouda et al.
patent: 5568373 (1996-10-01), Small
patent: 5570254 (1996-10-01), Spilger et al.

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