ELECTRIC ROLLING STOCK SPEED CONTROLLER Russian patent published in 2009 - IPC B60L15/00 

FIELD: railway transport.

SUBSTANCE: proposed device comprises power source, contactor, armature windings, excitation windings of first and second traction DC motors, first diode, storage battery, second diode, 4^th and 3^rd DC traction motor armature windings, and common bus. Storage battery is connected in traction current circuit, absorbs excess voltage in starting and gets charged, at a time. During independent operation, DC traction motors change over to supply from storage battery after 6^th, 2^nd and 4^th contactors are thrown in. Current flows from storage battery anode via 2^nd contactor, armature windings, 1^st and 2^nd Dc traction motor excitation windings, 4^th contactor, excitation windings, 4^th and 3^rd DC traction motor armature windings, 6^th contactor and storage battery cathode. In braking, electric power is generated by DC traction motors to recharge storage battery.

EFFECT: expanded range of rolling stock independent motion and expanded operating performances.

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