Programmable electronic current limiter

Details Programmable electronic current limiter Programmable electronic current limiter

1998-06-06

2000-04-04

Medley, Sally C.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

318434, H02H 504

Patent

active

060468939

ABSTRACT:
A programmable electronic current limiter for a winch includes a signal conditioning circuit monitoring a differential signal taken from a resistive element of the winch motor and providing a stable DC voltage signal representing in linear fashion motor load conditions. By setting a threshold within the range of the DC load signal, motor operation halts in response to load conditions exceeding the selected threshold. The threshold may be established explicitly by application or may be adopted as a function of actual load conditions during a programming step. Overall, the device is more accurate and more responsive than prior electronic current limiters thereby provides greater protection against damage or deterioration of a winch and its supporting structures.

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