Phase control device for a power converter

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

H - Electricity

02

M

321/96

H02M 1/084 (2006.01) H02M 7/757 (2006.01)

Patent

CA 1222022

ABSTRACT OF THE DISCLOSURE 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. The phase control device also includes 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. The phase control device further includes a firing pulse determination circuit for comparing the phase signal with the phase control signal to produce a plurality of firing pulses, each of which is adapted to be connected to each of the control rectifier elements to fire thereof. The processing circuit includes a monitoring circuit which judges whether or not the phase control device is in failure based on the phase signal, the phase control signal and a specific firing pulse from the firing pulse determination circuit.

467941

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