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1. A power converter, which is built in a power generator, the power converter being connected to a rotating electrical machine including a field winding and a plurality of sets of armature windings and being configured to convert AC power generated by the rotating electrical machine into DC power,
the power converter comprising: a field power conversion section for controlling a field current flowing in the field winding; an armature power conversion section comprising bridge circuits, the bridge circuits being provided correspondingly to the plurality of sets of armature windings and each comprising switching elements of a positive arm and switching elements of a negative arm; and a control section configured to, when it is detected that a voltage between a B-terminal and an E-terminal, configured as input or output terminals of the power generator, has exceeded a first predetermined voltage value:
turn on, simultaneously, all the switching elements of one of the negative arm or the positive arm of the bridge circuit connected to one of the plurality of sets of armature windings and turn off, simultaneously, all the switching elements of the other one of the positive arm or the negative arm that is paired in the same bridge circuit with the one of the negative arm and the positive arm;reduce the field current flowing in the field winding to start an operation of reducing load dump energy; andthereafter turn off all the turned-on switching elements when a predetermined condition is satisfied, wherein the control section, when it is detected that the voltage between the B-terminal and the E-terminal has exceeded the first predetermined voltage value is configured to simultaneously turn off all the switching elements of both the negative arm and the positive arm of a bridge circuit connected to another of the plurality of sets of armature windings. |
