METHOD AND SYSTEM FOR MOTOR FAILURE DETECTION

摘要

Systems and methods for detecting developing faults in a flow generator or ventilator during therapeutic use thereof are provided. The motor current may be measured to estimate the torque input by the motor, while the output torque from the impeller may be determined (e.g., as inferred from the motor control system model and/or by consulting a lookup table). One or more transducers may collect data useful in determining the input and output torques. A difference between the input (to the motor) torque and the output (from the impeller) torque may be calculated. The difference, optionally filtered using a low-pass filter to reduce noise, may be compared to a predetermined threshold once or over a period of time to detect gross failures and/or developing failures. Once a failure or developing failure is detected, a user may be alerted and/or the flow generator may be placed into a “service required” mode.

主权项

1. A method of detecting developing faults in a flow generator having an impeller powered by a motor under servo-control during operation of the flow generator, the method comprising:
supplying a flow of pressurized breathable gas generated by the flow generator; measuring, with a first transducer, at least one input parameter supplied to the motor when the flow generator is generating the flow of pressurized breathable gas; determining, with a controller having a processor, an input motor power value provided to the motor, the input motor power value based at least in part on the at least one input parameter measured by the first transducer; measuring, with a second transducer, at least one output from a turbine of the motor; determining, with the controller, a load motor power value, the load motor power value based at least in part on the at least one measured output measured by the second transducer; calculating, with the controller, a difference between the load motor power value and the input motor power value, the difference being associated with losses in the motor; and assessing, with the controller, whether a fault is developing in the flow generator based at least in part on the difference by comparing the difference to a predetermined threshold.