| 摘要 |
<p num="1">A motor control system (10) includes a piston chamber (12) and a piston assembly (20) disposed within the piston chamber to move therein between first and second positions. A magnet (68) is coupled to the piston assembly to move therewith and a sensor (66) is axially mounted with respect to the piston assembly to generate a continuous output signal corresponding to a position of the magnet relative to the sensor. The motor control system also includes a controller (54) for processing the output signal from the sensor to monitor continuously the position of the piston assembly within the piston chamber and for actuating the piston assembly to move in an upstroke toward the first position and in a downstroke toward the second position.
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