Axial bearing wear detector device for canned motor

Year	Description
2001	Invention patented by Masaru Abe, Hisashi Misato, and Takashi Nii on February 12th, 2001. Abstract: Axial bearing wear in a motor is determined by differencing signals from special coils in the two ends of the motor stator. The signals on the two coils vary in opposite directions with axial displacement of the motor rotor. A dead zone circuit suppresses output when the axial displacement of the rotor is within the normal range of play for the rotor of the particular motor. When the axial displacement exceeds the normal range, the output actuates an indicator in relation to the magnitude of the displacement in excess of the normal range. Sequential LED indicators indicate both magnitude and direction of excess displacement. An analog meter is also disclosed which indicates only the magnitude of the excess displacement.
Source: selected by the editor from original sources.

Invention: Axial bearing wear detector device for canned motor