Operation monitoring device for spindle motor of hard disk drive of computer, has signal processing unit for outputting operating condition of bearing based on result of comparison of analysis of detected spectrum with expected spectrum

摘要

The device has a vibration sensor for detecting vibrations of a spindle motor (16), and a signal processing unit (26) for analyzing a spectrum of the detected vibrations. A sliding bearing is integrated into a base plate of the spindle motor and supports a rotor of the spindle motor relative to a stator. The processing unit compares the result of the analysis of the detected spectrum with an expected spectrum and outputs an operating condition of the sliding bearing based on the result of the comparison. The vibration sensor is attached to the base plate of the spindle motor. Independent claims are also included for the following: (1) a spindle motor comprising a rotor supported relative to a stator by a sliding bearing (2) a method for monitoring operating of a spindle motor.