Method for evaluating manufacturing operational effects on insulated windings

Claim 1

A method for evaluating the effect of a preselected manufacturing operation on a structure including an insulated winding, the method comprising: submerging the winding in a conductive fluid; applying a potential across the winding and fluid; determining a first capacitive component of leakage current from the winding; removing the winding from the fluid; performing a preselected manufacturing operation on the winding; again submerging the winding in a conductive fluid; again applying a potential across the winding and fluid; determining a second capacitive component of leakage current from the winding; and comparing the first and second capacitive components of leakage current.

Claim 2

A method for evaluating the effect of a preselected manufacturing operation on a structure including an insulated winding, the method comprising: submerging the winding in a conductive fluid; applying a potential across the winding and fluid; determining a first capacitive component of leakage current from the winding; removing the winding from the fluid; performing a preselected manufacturing operation on the winding; again submerging the winding in a conductive fluid; again applying a potential across the winding and fluid; determining a second capacitive component of leakage current from the winding; and comparing the first and second capacitive components of leakage current.

Claim 3

A method for evaluating the effect of a preselected manufacturing operation on a structure including an insulated winding conductor having an insulation coating thereon, the method comprising: submerging the insulated conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a proportional indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a proportional indication of the resistive component of leakage current flowing through the Conductor and fluid; forming a first ratio of the proportional indications of capacitive and resistive leakage current; removing the conductor from the fluid; performing a preselected manufacturing operation on the structure; again submerging the conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a second proportional indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a second proportional indication of the resistive component of leakage current; forming a second ratio of the second proportional indication of capacitive and resistive leakage current; and comparing the first ratio to the second ratio thereby to qualitatively ascertain changes in insulation integrity after performance of the manufacturing operation.

Claim 4

A method for evaluating the effect of a preselected manufacturing operation on a structure including an insulated winding conductor having an insulation coating thereon, the method comprising: submerging the insulated conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a proportional indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a proportional indication of the resistive component of leakage current flowing through the Conductor and fluid; forming a first ratio of the proportional indications of capacitive and resistive leakage current; removing the conductor from the fluid; performing a preselected manufacturing operation on the structure; again submerging the conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a second proportional indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a second proportional indication of the resistive component of leakage current; forming a second ratio of the second proportional indication of capacitive and resistive leakage current; and comparing the first ratio to the second ratio thereby to qualitatively ascertain changes in insulation integrity after performance of the manufacturing operation.

Claim 5

A method for evaluating the effect of a preselected manufacturing operation on a dynamoelectric machine stator including an insulated winding, the method comprising: submerging the stator in a conductive fluid; applying a potential across the stator and fluid; determining a first capacitive component of leakage current from the stator; removing the stator from the fluid; performing a preselected manufacturing operation on the stator; again submerging the stator in a conductive fluid; again applying a potential across the stator and fluid; determining a second capacitive component of leakage current from the stator; and comparing the first and second capacitive components of leakage current.

Claim 6

A method for evaluating the effect of a preselected manufacturing operation on a dynamoelectric machine stator including an insulated winding, the method comprising: submerging the stator in a conductive fluid; applying a potential across the stator and fluid; determining a first capacitive component of leakage current from the stator; removing the stator from the fluid; performing a preselected manufacturing operation on the stator; again submerging the stator in a conductive fluid; again applying a potential across the stator and fluid; determining a second capacitive component of leakage current from the stator; and comparing the first and second capacitive components of leakage current.

Claim 7

A method for evaluating the effect of a preselected manufacturing operation on a dynamoelectric machine stator including an insulated winding conductor having an insulation coating thereon, the method comprising: submerging the insulated conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a proportional indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a proportional indication of the resistive component of leakage current flowing through the conductor and fluid; forming a first ratio of the proportional indications of capacitive and resistive leakage current; removing the conductor from the fluid; performing a preselected manufacturing operation on the stator; again submerging the conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a second proportional indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a second proportional indication of the resistive component of leakage current; forming a second ratio of the second proportional indication of capacitive and resistive leakage current; and comparing the first ratio to the second ratio thereby to qualitatively ascertain changes in insulation integrity after performance of the manufacturing operation.

Claim 8

A method for evaluating the effect of a preselected manufacturing operation on a dynamoelectric machine stator including an insulated winding conductor having an insulation coating thereon, the method comprising: submerging the insulated conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a proportional indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a proportional indication of the resistive component of leakage current flowing through the conductor and fluid; forming a first ratio of the proportional indications of capacitive and resistive leakage current; removing the conductor from the fluid; performing a preselected manufacturing operation on the stator; again submerging the conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a second proportional indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a second proportional indication of the resistive component of leakage current; forming a second ratio of the second proportional indication of capacitive and resistive leakage current; and comparing the first ratio to the second ratio thereby to qualitatively ascertain changes in insulation integrity after performance of the manufacturing operation.

Claim 9

A method for evaluating the effect of a preselected manufacturing operation on an insulated winding for a dynamoelectric machine, the method comprising: submerging the winding in a conductive fluid; applying a potential across the winding and fluid; determining a first capacitive component of leakage current from the winding; removing the winding from the fluid; performing a preselected manufacturing operation on the winding; again submerging the winding in a conductive fluid; again applying a potential across the winding and fluid; determining a second capacitive component of leakage current from the winding; and comparing the first and second capacitive components of leakage current.

Claim 10

A method for evaluating the effect of a preselected manufacturing operation on an insulated winding for a dynamoelectric machine, the method comprising: submerging the winding in a conductive fluid; applying a potential across the winding and fluid; determining a first capacitive component of leakage current from the winding; removing the winding from the fluid; performing a preselected manufacturing operation on the winding; again submerging the winding in a conductive fluid; again applying a potential across the winding and fluid; determining a second capacitive component of leakage current from the winding; and comparing the first and second capacitive components of leakage current.

Claim 11

A method for evaluating the effect of a preselected manufacturing operation on an insulated winding conductor, for a dynamoelectric machine, having an insulation coating thereon, the method comprising: submerging at least the insulated conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a proportionaL indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a proportional indication of the resistive component of leakage current flowing through the conductor and fluid; forming a first ratio of the proportional indications of capacitive and resistive leakage current; removing the conductor from the fluid; performing a preselected manufacturing operation on the dynamoelectric machine winding; again submerging at least the conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a second proportional indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a second proportional indication of the resistive component of leakage current; forming a second ratio of the second proportional indication of capacitive and resistive leakage current; and comparing the first ratio to the second ratio thereby to qualitatively ascertain changes in insulation integrity after performance of the manufacturing operation.

Claim 12

A method for evaluating the effect of a preselected manufacturing operation on an insulated winding conductor, for a dynamoelectric machine, having an insulation coating thereon, the method comprising: submerging at least the insulated conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a proportionaL indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a proportional indication of the resistive component of leakage current flowing through the conductor and fluid; forming a first ratio of the proportional indications of capacitive and resistive leakage current; removing the conductor from the fluid; performing a preselected manufacturing operation on the dynamoelectric machine winding; again submerging at least the conductor in a conductive fluid; applying a potential across the conductor and fluid; determining at least a second proportional indication of the capacitive component of leakage current flowing through the conductor and fluid; determining at least a second proportional indication of the resistive component of leakage current; forming a second ratio of the second proportional indication of capacitive and resistive leakage current; and comparing the first ratio to the second ratio thereby to qualitatively ascertain changes in insulation integrity after performance of the manufacturing operation.