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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

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.

대표청구항 ▼

[ What is claimed is:] [10.] In an electronic current limiter for an electric motor, the limiter receiving a load signal from the motor and representing a load condition relative to said motor, the limiter including a comparator comparing said load signal to a programmable shutoff threshold load val

[ What is claimed is:] [10.] In an electronic current limiter for an electric motor, the limiter receiving a load signal from the motor and representing a load condition relative to said motor, the limiter including a comparator comparing said load signal to a programmable shutoff threshold load value and halting operation of said motor as a function of said comparison, an improvement comprising:a threshold programming signal applied to said comparator, said comparator accepting and thereafter maintaining a current value of said load signal as a new shutoff threshold value for subsequent operation.