Phase control device for a power converter

Details Phase control device for a power converter Phase control device for a power converter

1984-11-08

1986-01-28

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363129, H02M 7155, H02P 1324

Patent

active

045675520

ABSTRACT:
A phase control device for a power converter with a plurality of controlled rectifier elements, including a phase detector for detecting a phase of an AC voltage of the power converter to produce a phase signal. A processing circuit for receiving an electrical quantity appearing at an AC side or a DC side of the power converter as a feedback signal and for comparing the feedback signal with a reference signal to produce a phase control signal so that the feedback signal becomes equal to the reference signal, and a firing pulse determination circuit for comparing the phase signal with the phase control signal to produce a plurality of firing pulses, which are adapted to be connected to selected of the controlled rectifier elements to fire the controlled rectifier elements. The processing circuit includes a monitoring circuit which judges whether or not the phase control device has failed based on the phase signal, the phase control signal and a specific firing pulse from the firing pulse determination circuit.

REFERENCES:
patent: 4438487 (1984-03-01), Kawai
patent: 4455598 (1984-06-01), Andre
patent: 4464711 (1984-08-01), Hosokawa et al.
patent: 4489323 (1984-12-01), Glennon et al.
patent: 4490780 (1984-12-01), Nondahl

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