Microprocessor controlled arthroscopic surgical system
First Claim
1. An apparatus for controlling the speed of a plurality of DC motors, comprising:
- means for supplying voltage to one of the plurality of DC motors;
means for selecting one of the DC motors to be connected to said means for supplying voltage;
means for selecting a desired speed for the selected DC motor;
means for selecting a desired mode of operation for the selected DC motor;
means for producing a feedback signal representative of an electrical current drawn by the selected DC motor; and
control means for;
(i) producing a reference voltage in response to said means for selecting one of the DC motors and said means for selecting said desired speed;
(ii) producing a control voltage in response to said reference voltage and said means for selecting said desired mode of operation;
(iii) producing a load voltage in response to said feedback signal and said means for selecting one of the DC motors; and
(iv) outputting a control signal which is the sum of said control voltage and said load voltage to said means for supplying voltage.
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Accused Products
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.
974 Citations
27 Claims
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1. An apparatus for controlling the speed of a plurality of DC motors, comprising:
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means for supplying voltage to one of the plurality of DC motors; means for selecting one of the DC motors to be connected to said means for supplying voltage; means for selecting a desired speed for the selected DC motor; means for selecting a desired mode of operation for the selected DC motor; means for producing a feedback signal representative of an electrical current drawn by the selected DC motor; and control means for; (i) producing a reference voltage in response to said means for selecting one of the DC motors and said means for selecting said desired speed; (ii) producing a control voltage in response to said reference voltage and said means for selecting said desired mode of operation; (iii) producing a load voltage in response to said feedback signal and said means for selecting one of the DC motors; and (iv) outputting a control signal which is the sum of said control voltage and said load voltage to said means for supplying voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 27)
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21. A system for controlling powered surgical instruments within predetermined parameters, comprising:
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means for supplying voltage to one of a plurality of hand-held surgical motors; means for selectively connecting one of the surgical motors to said means for supplying voltage; means for selecting a desired speed for the connected surgical motor; means for selecting a desired mode of operation for the connected surgical motor; means for producing a feedback signal representative of an electrical current drawn by the connected surgical motor; and control means for; (i) selecting a reference voltage in response to the connected surgical motor and said desired speed; (ii) producing a control voltage in response to said reference voltage and said means for selecting said desired mode of operation; (iii) producing a load voltage in response to said feedback signal and the connected surgical motor; and (iv) outputting a control signal responsive to said control voltage and said load voltage to said means for supplying voltage. - View Dependent Claims (22, 23, 24, 25)
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26. A method for controlling the speed of a plurality of DC motors, comprising the steps of:
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selectively to one of the plurality of DC motors; selecting a desired speed for the selected DC motor; producing a feedback signal representative of an electrical current drawn by the selected DC motor; producing a reference voltage in response to the selected DC motor and said desired speed; producing a control voltage in response to said reference voltage and said desired mode of operation; producing a load voltage in response to said feedback signal and the selected DC motor; and outputting a control signal which is the sum of said control voltage and said load voltage to said means for supplying voltage.
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Specification