Microprocessor controlled arthroscopic surgical system
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United States of America Patent
Stats
-
Dec 31, 1991
Grant Date -
N/A
app pub date -
Feb 3, 1989
filing date -
Feb 3, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for controlling the speed of a plurality of DC motors, comprises a device for supplying voltage to one of the plurality of DC motors, first selector for selecting one of the DC motors to be connected to the device for supplying voltage, second selector for selecting a desired speed for the selected DC motor, a device for producing a feedback signal representative of an electrical current drawn by the selected DC motor and a controller for: (i) producing a reference voltage in response to the first and second selectors (ii) producing a load voltage in response to the feedback signal and (iii) outputting a control signal which is the sum of the reference voltage and the load voltage to the device for supplying voltage so that the selected DC motor is operated at the desired speed.
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