LOCOMOTIVE AUXILIARY LOAD SUPPLY CIRCUIT Russian patent published in 2012 - IPC B60L1/00 

FIELD: transport.

SUBSTANCE: invention relates to railway transport, particularly, to electric rolling stock with auxiliary three-phase load supply circuit. Proposed circuit comprises several three-phase voltage inverters connected in parallel with constant voltage source terminals. Three-phase transformer to supply three-phase loads in connected in delta-star circuit to output of every three-phase voltage inverter. Set of auxiliary loads is connected to secondary of every three-phase transformer. Every three-phase voltage inverter connected in parallel with constant voltage source terminals makes independent load power supply channel. Proposed circuit comprises independent supply channels with adjustable and fixed supply frequency electrically interconnected via switches connected on three-phase voltage side to switch adjustable-supply-frequency channels over to fixed-frequency channels. Note here that supply circuit loads are electrically connected with voltage source via mains circuit.

EFFECT: higher safety, usability.

1 dwg