초록 ▼

An electric locomotive has two AC-DC converters which are connected in cascade, and a power factor controller is connected to one of the converters. Two automatic pulse phase shifters are provided for the two converters and controlled by a signal responding to a difference signal between a current f

An electric locomotive has two AC-DC converters which are connected in cascade, and a power factor controller is connected to one of the converters. Two automatic pulse phase shifters are provided for the two converters and controlled by a signal responding to a difference signal between a current flowing in the converters and a reference signal. One of the input signals of the automatic pulse phase shifter is regulated by a bias signal. The output from each of the automatic pulse phase shifters to each of the converters is switched when the measured speed of the locomotive exceeds a predetermined reference speed signal.

대표청구항 ▼

A control system for an electric locomotive, having two cascaded power converters, one of said converters having a capacitance connectable thereto, comprising: two firing signal generators responding to an electric current supplied to said converters by generating firing signals, each of the firing

A control system for an electric locomotive, having two cascaded power converters, one of said converters having a capacitance connectable thereto, comprising: two firing signal generators responding to an electric current supplied to said converters by generating firing signals, each of the firing signals being supplied to cause operation of different ones of said converters in a predetermined order, with phase control angles of said two firing signal generators being different; and means responsive to a signal related to a speed of the locomotive, for changing the firing signals to be supplied to said two converters when a first condition that the speed-related signal exceeds a predetermined value is satisfied whereby the phase control angle of the firing signal supplied to the one of said converters to which the capacitance is connectable is made greater than that supplied to the other one of said converters.