Motor bearing wear detecting device
First Claim
1. A motor bearing wear detecting device comprising:
- a single axial position detecting coil provided near one end of a stator of a motor in such a manner as to be circumferentially wound around a cylindrical outer surface of a container that contains at least part of a rotor of said motor, andan axial position detecting device detecting the axial position of said rotor by voltages induced in said single axial position detecting coil.
1 Assignment
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Accused Products
Abstract
Reinforcing rings are provided around the cylindrical outer surface of a stator can of a canned motor, near the front and rear ends of a stator of the canned motor respectively. An axial position detecting coil A is wound around the cylindrical outer surface of at least one of the reinforcing rings. The axial position of a rotor is detected by an inductance of the axial position detecting coil A. The axial position detecting coil A is installed by winding a coil around at least one of the reinforcing rings. The invention reduces the influence exerted by change in the radial position of the rotor on the output to the axial position detecting coil A to a negligible level and enables detection of the axial position of the rotor and axial zero adjustment without the necessity of considering change in the radial position of the rotor.
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Citations
16 Claims
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1. A motor bearing wear detecting device comprising:
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a single axial position detecting coil provided near one end of a stator of a motor in such a manner as to be circumferentially wound around a cylindrical outer surface of a container that contains at least part of a rotor of said motor, and an axial position detecting device detecting the axial position of said rotor by voltages induced in said single axial position detecting coil. - View Dependent Claims (2, 3, 4)
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5. A motor bearing wear detecting device comprising:
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a single axial position detecting coil provided near one end of a stator of a motor in such a manner as to be circumferentially wound around a cylindrical outer surface of a container that contains at least part of a rotor of said motor, a high frequency signal applying device applying high frequency signals to said single axial position detecting coil, an inductance detecting device detecting the inductance of said single axial position detecting coil to which a high frequency signal has been applied, and an axial position detecting device detecting the axial position of said rotor by the inductance of said single axial position detecting coil. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification