The on-line pipe flaw detector with magnetic leakage flux principle is introduced, providing details regarding the excitercircuit structure, magnetic sensors and signal processing.
The paper analyzes the rated case and fault cases of a 11 phase brushless exciter by general simulation model of exciter, which is based on Kron's tensor circuit.
The situations of the 11 phase brushless exciter in case of faults such as open circuit of one of diodes, short circuit of one of diodes, are analyzed.