Patent ID: 9459320
Filing Date: 2016-10-04
CPC Classification: G01R,H02H,H02P

Claim Text:
1. A method for detecting a fault in an exciter circuit, suitable for use in a brushless generator, the exciter circuit including an exciter armature winding, having a plurality of armatures, arranged to generate a multiphase AC signal, each armature of the plurality of armatures providing a respective signal component of the multiphase AC signal, and a rectifier circuit for receiving the signal components from the respective armatures, the rectifier circuit comprising a plurality of diodes arranged to rectify the signal component of each armature to provide a rectified output signal, wherein the method includes the steps of: acquiring, for each signal component of at least two of the plurality of armatures, a respective characteristic value for a first characteristic of each signal component; acquiring, for each signal component of the at least two of the plurality of armatures, a respective further characteristic value for a second characteristic of each signal component; calculating the magnitude of the n calculating the magnitude of the n on the basis of the calculated magnitudes, calculating the n determining whether a fault has occurred in the exciter circuit on the basis of the n