H - Electricity – 02 – P
Patent
H - Electricity
02
P
318/103, 322/14.
H02P 9/14 (2006.01) G05B 9/03 (2006.01) H02H 7/06 (2006.01) H02P 7/28 (2006.01) H02P 9/10 (2006.01)
Patent
CA 2038424
An excitation control system (200) for a synchronous machine and configured from automatic voltage regulators (6a, 6b, 6c) that output control signals (CA, CB, CC) so as to regulate a terminal voltage of a synchronous machine (1), phase controllers (8a, 8b, 8c) that output phase signals (PA, PB, PC) so as to control the phase of an arc pulse (PL) of a thyristor rectifier that supplies a field current to a field winding (2) of the synchronous machine (1), intermediate pulse selectors (14) provided with three pairs of pulse outputters (11a, 11b, 11c) that output the arc pulses (PL) on the basis of the phase signals (PA, PB, PC) and which are provided between aforementioned three pairs of pulse outputters (11a, 11b, 11c) and phase controllers (8a, 8b, 8c) provided between pulse outputters (11a, 11b, 11c) and the three pairs of phase controllers (8a, 8b, 8c), with a logical sum of the three arc pulses being supplied to said thyristor rectifier. Furthermore, the intermediate pulse selectors (14) selects phase signals of an intermediate phase from the three phase signals (PA, PB, PC), phase signals from one of another two pairs being selected and output when one pair of the three pairs of automatic voltage regulators (6a, 6b, 6c) and phase controllers (8a, 8b, 8c) fails, with phase signals output from the unfailed pair being selected and output when two of the three pairs of automatic voltage regulators (6a, 6b, 6c) and phase controllers (8a, 8b, 8c) fails.
Fetherstonhaugh & Co.
Kabushiki Kaisha Toshiba
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