MOTOR HEALTH MONITORING AND MEDICAL DEVICE INCORPORATING SAME
First Claim
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1. A method of detecting degradation in a drive system including a motor, the method comprising:
- applying a modulated voltage to the motor;
adjusting a duty cycle of the modulated voltage to achieve a commanded rotation of a rotor of the motor; and
identifying a degradation condition based on the duty cycle.
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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.
4 Citations
20 Claims
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1. A method of detecting degradation in a drive system including a motor, the method comprising:
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applying a modulated voltage to the motor; adjusting a duty cycle of the modulated voltage to achieve a commanded rotation of a rotor of the motor; and identifying a degradation condition based on the duty cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of detecting degradation in a drive system including a motor, the method comprising:
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applying a modulated voltage to the motor, the modulated voltage oscillating between a first voltage and a second voltage and being equal to the first voltage for a percentage of a time interval corresponding to a duty cycle; adjusting the duty cycle of the modulated voltage to achieve a commanded rotation of a rotor of the motor; and identifying a degradation condition based on the duty cycle. - View Dependent Claims (14, 15, 16, 17)
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18. A method of operating an infusion device and detecting degradation in a drive system of the infusion device during operation of the infusion device, the drive system including a motor having a rotor and the infusion device including a shaft mechanically coupled to the rotor and displaced to deliver fluid in response to rotation of the rotor, the method comprising:
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applying a modulated voltage to the motor, the modulated voltage oscillating between a first voltage and a second voltage and the modulated voltage being equal to the first voltage for a percentage of a time interval corresponding to a duty cycle; adjusting the duty cycle of the modulated voltage to achieve a commanded rotation of the rotor of the motor; and identifying a degradation condition based on the duty cycle. - View Dependent Claims (19, 20)
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Specification