POWER SUPPLY SYSTEM FOR ELECTRIC MOTOR CAR

• Main Authors: FUJITA TSUNEHITO, SHIRASAWA YUKI
• Format: Patent
• Language: Chinese; English
• Published: 27.11.2020
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; LOCOMOTIVES; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MOTOR RAILCARS; PERFORMING OPERATIONS; RAILWAYS; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL

A power supply system for an electric motor car according to an embodiment has a first terminal, a second terminal, and a conversion unit. The first terminal is electrically connected to an electricity-storage device provided in a train of electric motor cars or to an overhead contact line. The second terminal is electrically connected to a train line to which a plurality of electric motors and aself-power supply device in the train and an external power supply device are also electrically connected. The conversion unit, in a first operation state, takes from the second terminal a first electric power supplied from the plurality of electric motors and the external power supply device, generates a DC voltage at the first terminal by a regenerative operation of the conversion unit, and charges the electricity-storage device. The conversion unit, in a second operation state, takes from the first terminal a second electric power supplied from the electricity-storage device or the overheadcontact line, converts pa