Brushless exciter for controlling excitation of a...

Details Brushless exciter for controlling excitation of a... Brushless exciter for controlling excitation of a...

H - Electricity

02

P

318/103

H02P 25/02 (2006.01)

Patent

CA 1256488

ABSTRACT A brushless exciter is provided for controlling excitation of a synchronous motor. The brushless exciter uses a center tapped rotating transformer, a discharge resistor, a field winding which has one end coupled to the ends of the rotating transformer and the other end connected to the discharge resistor and center tap of the rotating transformer. Four power SCR's are used in the brushless exciter. The electronics for controllably firing the SCR's and applying and removing the field are arranged in modules. A field current regulator module is located externally of the rotating apparatus for external control and contains circuitry for field forcing. The circuitry controls the application of field current and the level of excitation. The circuitry monitors the presence, frequency and phase angle of the discharge current and determines the time for field application and removal.

521413

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