Monitoring speed control and precision incrementing of motor for powered surgical instruments
First Claim
1. A motor speed control system comprising:
- a motor having an output shaft;
a gear reduction assembly operably coupled to the output shaft;
a detectable element located in the gear reduction assembly; and
at least one sensor to sense the detectable element, the at least one sensor placed in a radial path of the detectable element, the at least one sensor in data communication with a controller configured to receive a signal from the at least one sensor and to control the speed of the output shaft;
wherein the gear reduction assembly comprises a planetary gear train;
wherein the planetary gear train comprises a first stage, wherein the planetary gear train is driven by a sun gear attached directly or indirectly to the motor output shaft, and wherein the sun gear drives one or more first stage planet gears, which in turn engage a first stage annular gear; and
a first stage carrier in communication with the first stage planet gears, the first stage carrier includes or connects to a second stage sun gear that drives a second stage.
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Accused Products
Abstract
Motor speed control systems are disclosed that include a motor having an output shaft, a motor speed control system, a sensor to detect the speed of the motor, and a controller to receive a signal from the sensor and to control the speed of the output shaft. A gear reduction assembly is operably coupled to the output shaft and a detectable element located in the gear reduction assembly. The sensor senses the detectable element. The sensor is placed in the radial path of the detectable element. Another system includes a brushless motor having a housing and an output shaft, the brushless motor comprising electromagnetic field coils arrayed radially around a central magnetic shaft, a gear reduction assembly operably coupled to the output shaft, and a sensor placed in proximity to the brushless motor. The sensor communicates with a controller to control the speed of the output shaft.
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Citations
15 Claims
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1. A motor speed control system comprising:
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a motor having an output shaft; a gear reduction assembly operably coupled to the output shaft; a detectable element located in the gear reduction assembly; and at least one sensor to sense the detectable element, the at least one sensor placed in a radial path of the detectable element, the at least one sensor in data communication with a controller configured to receive a signal from the at least one sensor and to control the speed of the output shaft; wherein the gear reduction assembly comprises a planetary gear train; wherein the planetary gear train comprises a first stage, wherein the planetary gear train is driven by a sun gear attached directly or indirectly to the motor output shaft, and wherein the sun gear drives one or more first stage planet gears, which in turn engage a first stage annular gear; and a first stage carrier in communication with the first stage planet gears, the first stage carrier includes or connects to a second stage sun gear that drives a second stage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A motor speed control system comprising:
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a brushless motor having a housing and an output shaft, the brushless motor comprising electromagnetic field coils arrayed radially around a central magnetic shaft; a gear reduction assembly operably coupled to the output shaft; and at least one sensor placed in proximity to the brushless motor, the at least one sensor in data communication with a controller configured to receive a signal from the at least one sensor and to control the speed of the output shaft; and negative and positive electromagnetic field coils alternately arranged around the central magnetic shaft, wherein the coils are sequentially activated and deactivated to drive the central magnetic shaft. - View Dependent Claims (9)
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10. A powered surgical instrument comprising:
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a brushless motor having a housing and an output shaft, the brushless motor comprising electromagnetic field coils arrayed radially around a central magnetic shaft; a motor speed control system in communication with the brushless motor; at least one sensor to detect the speed of the brushless motor; and a controller configured to receive a signal from the at least one sensor and configured to control the speed of the output shaft; wherein the motor speed control system comprises; a gear reduction assembly operably coupled to the output shaft; and the at least one sensor placed in proximity to the brushless motor, the at least one sensor in data communication with a controller configured to receive a signal from the sensor and to control the speed of the output shaft. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification