ELECTRIC PROPULSION INSTALLATION WITH CLOSING DEVICE Russian patent published in 2013 - IPC H02M5/45 

FIELD: electricity.

SUBSTANCE: according to the invention, in an electric propulsion installation with a closing device there is a low-capacity transformer used, which is connected with a rectifier, which in its turn via an RL-circuit is connected with an output of the active rectifier. A control system changes the mode of operation of the active rectifier, and also issues a signal of prohibition for inverter operation. A synchronisation device performs synchronisation on the side of the primary winding of a power transformer and a source of power.

EFFECT: reduced distortion of a voltage curve in a grid with connection of a power transformer to a source of power, reduced time of preparation for start of an electric propulsion installation, preliminary charging of intermediate circuit capacitors, possibility of recuperation of energy into grid in case of reverse and braking motion of an electric propulsion installation and control of a power coefficient and quality of energy at a frequency converter inlet.

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