Error compensation of synchro control transmitters
AssigneeThe Singer Company
InventorsCharles W. Lang, Thomas Beneventano
Life of this patent
Estimating the term…
Abstract
In order to correct errors in a synchro control transmitter, the error in the transmitter is measured at equal angular increments, the magnitude and phase of the maximum error of the second harmonic determined and resistors placed across two pairs of the three transmitter outputs selected such as to establish a second harmonic load unbalance which is approximately equal in magnitude and opposite in phase to the measured error.
Claims8
A method of correcting errors in synchro control transmitters having a stator with outputs S1, S2 and S3 comprising:
- (a) measuring the error in the synchro transmitter at equal angular increments;
- (b) determining the magnitude and phase of the maximum error of the second harmonic;
- (c) placing across two pairs of the outputs S1, S2 and S3 resistors such as to establish a second harmonic load unbalance which is approximately equal in magnitude and opposite in phase to the measured error.
A compensated synchro transmitter comprising a synchro transmitter having a rotor winding and three Y-connected stator windings having outputs S1, S2 and S3 and first and second resistors across two selected pairs of said terminals, said resistors having values such that when placed across said selected pairs of said terminals such that they generate an unbalanced second harmonic load error which has a phase and magnitude approximately opposite to the second harmonic error in said synchro, thereby correcting said second harmonic error to improve the accuracy of said synchro.
Dependencies are inferred from the claim text.