Patent ID: 11959977
Assignee: HAMILTON SUNDSTRAND CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H  B | IPC G  H

Claim 10:
11. A method, comprising:
detecting a fault in at least one secondary winding of a variable differential transformer across a first side line with respect to a center-tap and a second side line with respect to the center-tap using a sum voltage of the first side line and the second side line; and
outputting a fault detection signal to a user indicting the fault
wherein the at least one secondary winding includes one secondary winding wound in one direction, wherein the at least one secondary winding includes two secondary windings wound in the same direction relative to one another, sampling a voltage of the first line of the at least one secondary winding with respect to the center-tap;
wherein detecting the fault includes:
sampling a voltage of the second side line of the at least one secondary winding with respect to the center-tap; and
summing the voltage of the first side line and the second side line, comparing the sum voltage to a known sum voltage; and
detecting a fault if a difference between the sum voltage of the first side line and the second side line is greater than a predetermined threshold, comparing the sum voltage to a known sum voltage; and
detecting a fault if a difference between the sum voltage of the first side line and the second side line is at or near zero.