Failure prediction in a rotating device

Patent metadata

Field	Value
Publication number	US-9863852-B2
Application number	US-201314060361-A
Country	US
Kind code	B2
Filing date	Oct 22, 2013
Priority date	Oct 24, 2012
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

Some of the embodiments provide a method comprising: during an operation phase, operating a rotating device at a first speed; during the operation phase, monitoring a first current consumed by the rotating device to operate at the first speed; comparing the first current to a second current measured during a calibration phase while rotating the device at a second speed, wherein the first speed is substantially equal to the second speed; and based on comparing the first current and the second current, predicting a possible failure of the rotating device.

First claim

What is claimed is:

1. A method comprising:
during an operation phase, operating a rotating device at a first speed;
during the operation phase, monitoring a first current consumed by the rotating device to operate at the first speed, wherein during a calibration phase, the rotating device is operated at a second speed and a third speed, wherein while the rotating device is operated at the second speed during the calibration phase, a second current is measured to be consumed by the rotating device, and wherein while the rotating device is operated at the third speed during the calibration phase, a third current is measured to be consumed by the rotating device;
determining that the first speed is substantially equal to the second speed;
in response to determining that the first speed is substantially equal to the second speed, comparing the first current to the second current; and
based on comparing the first current and the second current, predicting a possible failure of the rotating device.

2. The method of claim 1 , wherein predicting the possible failure of the rotating device further comprises:
in response to the first current being higher than the second current by a threshold percentage, predicting the possible failure of the rotating device.

3. The method of claim 1 , wherein monitoring the first current consumed by the rotating device to operate at the first speed further comprises:
during the operation phase, monitoring the first current at periodic intervals.

4. The method of claim 1 , wherein monitoring the first current consumed by the rotating device to operate at the first speed further comprises:
during the operation phase, monitoring the first current during a start up of the rotating device.

5. The method of claim 1 , wherein the possible failure of the rotating device is due to a fault in a mechanical arrangement used to rotate the rotating device.

6. The method of claim 1 , wherein the possible failure of the rotating device is due to accumulation of dust or other debris in a path of an air flow that is generated based on the rotation of the rotating device.

7. A system comprising:
a rotating device;
a speed control module configured to, during an operation phase, control the rotating device such that the rotating device operates at a first speed; and
a failure prediction module configured to
during the operation phase, monitor a first current consumed by the rotating device to operate at the first speed,
during a calibration phase, monitor (i) a second current consumed by the rotating device to operate at a second speed and (ii) a third current consumed by the rotating device to operate at a third speed,
determine that the first speed is substantially equal to the second speed,
in response to determining that the first speed is substantially equal to the second speed, compare the first current and the second current, and
based on comparing the first current and the second current, predict a possible failure of the rotating device.

8. The system of claim 7 , wherein the failure prediction module is further configured to:
in response to the first current being higher than the second current by a threshold percentage, predict the possible failure of the rotating device.

9. The system of claim 7 , wherein the failure prediction module is further configured to:
during the operation phase, monitor the first current at periodic intervals.

10. The system of claim 7 , wherein the failure prediction module is further configured to:
during the operation phase, monitor the first current during a start up of the rotating device.

11. The system of claim 7 , wherein the possible failure of the rotating device is due to a fault in a mechanical arrangement used to rotate the rotating device.

12. The system of claim 7 , wherein the possible failure of the rotating device is due to accumulation of dust or other debris in a path of an air flow that is generated based on the rotation of the rotating device.

13. The system of claim 7 , wherein the rotating device is a fan.

Assignees

• Marvell World Trade Ltd

Inventors

• Krishnamoorthy Ravishanker
• Leong Foo Leng
• Zhang Yayue
• Susanto Edy

Classifications

• H02H7/0844

  Fail safe control, e.g. by comparing control signal and controlled current, isolating motor on commutation error · CPC title

• G01M99/00 Primary

  Subject matter not provided for in other groups of this subclass · CPC title

• H02H7/085

  against excessive load {(H02H6/00 takes precedence)} · CPC title

• F04D27/001 Primary

  Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring · CPC title