Patent ID: 8278862

Claim:
A motor control system, comprising: a motor control circuit operably coupled to an electrical load; processing circuitry operably coupled to the motor control circuit; and a current sensor operably coupled to the processing circuitry and configured to sense a current delivered to the motor control circuit and to convey a signal to the processing circuitry proportional to an amount of current sensed; wherein the processing circuitry is configured to: sample the signal to obtain a plurality of current values over time, to store the plurality of current values, and to generate an operation profile from the plurality of current values; generate a threshold profile from the operation profile, the threshold profile comprising a threshold offset added to the plurality of current values; and compare at least one subsequent current value to the threshold profile, the at least one subsequent current value corresponding to at least one of a time of operation and a position of a motor in the threshold profile.