Motor health monitoring and medical device incorporating same
First Claim
Patent Images
1. An infusion device, comprising:
- a motor having a rotor;
a shaft mechanically coupled to the rotor, the shaft being displaced to deliver fluid in response to rotation of the rotor;
a modulation module coupled to the motor, the modulation module generating a modulated voltage applied to the motor, the modulated voltage having a duty cycle; and
a control module coupled to the modulation module to adjust the duty cycle to achieve a commanded rotation of the rotor, determine an observed value for a duty cycle metric based on the duty cycle and identify a degradation condition when the observed value exceeds a reference value.
1 Assignment
0 Petitions
Accused Products
Abstract
Apparatus are provided for motor control systems and related medical devices. In one embodiment, a control system includes a motor having a rotor, a modulation module coupled to the motor, and a control module coupled to the motor and the modulation module. The modulation module generates a modulated voltage that is applied to the motor, and the control module adjusts a duty cycle of the modulated voltage to achieve a commanded rotation of the rotor and detects a degradation condition based on the duty cycle.
355 Citations
15 Claims
-
1. An infusion device, comprising:
-
a motor having a rotor; a shaft mechanically coupled to the rotor, the shaft being displaced to deliver fluid in response to rotation of the rotor; a modulation module coupled to the motor, the modulation module generating a modulated voltage applied to the motor, the modulated voltage having a duty cycle; and a control module coupled to the modulation module to adjust the duty cycle to achieve a commanded rotation of the rotor, determine an observed value for a duty cycle metric based on the duty cycle and identify a degradation condition when the observed value exceeds a reference value. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A system comprising:
-
a motor having a rotor; a modulation module coupled to the motor, the modulation module generating a modulated voltage applied to the motor, the modulated voltage having a duty cycle; and a control module coupled to the motor and the modulation module to adjust the duty cycle to achieve a commanded rotation of the rotor, determine an observed value for a duty cycle metric based on the duty cycle, and detect a degradation condition when the observed value exceeds a reference value. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A system comprising:
-
a motor having a rotor; a modulation module coupled to the motor, the modulation module generating a modulated voltage applied to the motor, the modulated voltage having a duty cycle; and a control module coupled to the motor and the modulation module to adjust the duty cycle to achieve a commanded rotation of the rotor and detect a degradation condition when the duty cycle exceeds an average of the duty cycle over a preceding time interval.
-
-
12. A system comprising:
-
a motor having a rotor; a modulation module coupled to the motor, the modulation module generating a modulated voltage applied to the motor, the modulated voltage having a duty cycle; and a control module coupled to the motor and the modulation module to adjust the duty cycle to achieve a commanded rotation of the rotor and detect a degradation condition when the duty cycle exceeds a reference value by a fixed duty cycle percentage.
-
-
13. A system comprising:
-
a motor having a rotor; a modulation module coupled to the motor, the modulation module generating a modulated voltage applied to the motor, the modulated voltage having a duty cycle; and a control module coupled to the motor and the modulation module to adjust the duty cycle to achieve a commanded rotation of the rotor and detect a degradation condition when the duty cycle exceeds a reference value by a fixed percentage of the reference value.
-
-
14. A system comprising:
-
a motor having a rotor; a modulation module coupled to the motor, the modulation module generating a modulated voltage applied to the motor, the modulated voltage having a duty cycle; and a control module coupled to the motor and the modulation module to adjust the duty cycle to achieve a commanded rotation of the rotor and detect a degradation condition when an average of the duty cycle over a preceding time interval exceeds a reference value. - View Dependent Claims (15)
-
Specification