MOTORIZED CUTTING AND FASTENING INSTRUMENT HAVING CONTROL CIRCUIT FOR OPTIMIZING BATTERY USAGE

摘要

PROBLEM TO BE SOLVED: To provide a surgical cutting and fastening instrument.

SOLUTION: The instrument 10 comprises an end effector 12 and a shaft 8 connected to the end effector. The shaft comprises a drive train 16 for powering the end effector. The instrument also comprises a handle 6 connected to the shaft. The handle comprises an electric DC motor connected to the drive train for powering the drive train and a DC power source comprising one or more batteries. The handle also comprises a power regulator having an input device connected to the DC power source and an output device connected to the input device of the motor. The power regulator comprises a power converter and a control circuit for controlling the power converter. The control circuit controls a voltage set point for the power converter so that a voltage delivered from the power source is less than the voltage at which the power source delivers maximum power.

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