System and method for limiting vibration of electric motor
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United States of America Patent
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Mar 6, 2018
Issued Date -
N/A
app pub date -
Jun 30, 2016
filing date -
Jul 13, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system and method for limiting the vibration of an electric motor so as to avoid situations in which extreme vibration may result in damage to the motor or other equipment. A motor control subsystem runs the motor in accordance with a command specifying a speed or torque. A vibration sensor, such as a three-axis accelerometer, senses a vibration of the electric motor, or, alternatively, software indirectly detects the vibration based on phase or torque ripple. Such vibration may be caused by, e.g., a broken fan blade or an accumulation of snow or ice. A control element receives data regarding the vibration, determines whether the vibration exceeds a pre-determined limit, and if so, takes action to reduce the vibration of the electric motor below the pre-determined limit. Such action may involve slowing or stopping the motor, thereby avoiding damage, increasing reliability, and reducing cost.
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- G05B Class
- 0 % this patent is cited more than
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