Patent ID: 9440539
Filing Date: 2016-09-13
CPC Classification: B60L,B60M,H02J,H02M,Y02T

Claim Text:
1. An apparatus comprising: a power receiving unit constructed to be electrically connected to an overhead line and to receive power, the power receiving unit comprising a disconnector; a filter unit constructed to be electrically connected to the overhead line and to cut-off high frequency components; a charging unit constructed to be electrically connected between the overhead line and the filter unit and to prevent excess current from flowing into the filter unit during charging a capacitor of the charging unit, wherein the charging unit includes a block switch constructed to turn an electrical connection between the charging unit and the overhead line on and off; at least one storage unit including a plurality of super-capacitors constructed for storing electrical energy, wherein the at least one storage unit is constructed to output power; at least one capacitor monitoring unit constructed for measuring capacity of input/output currents and to send a result of monitoring to a controller; a plurality of bidirectional DC-DC converters arranged in parallel, where the bidirectional DC-DC converters are electrically connected between the filter unit and the storage unit, the plurality of bidirectional DC-DC converters constructed to control via turning on or off first to sixth transistors via a control signal, wherein two transistors of each bidirectional DC-DC converter are electrically coupled via an inductor and a shunt to a super-capacitor of the plurality of super-capacitors; a voltage detector electrically connected to the filter unit, the voltage detector constructed to detect a voltage of the overhead line; and a current detector constructed to detect an amount of current flowing into the filter unit and to output current to the controller, where the controller is constructed to receive a current signal from the current detector, a voltage signal from the voltage detector, and to output an on/off control signal to each of the first to sixth transistors of the bidirectional DC-DC converters; wherein, said apparatus is constructed for urban railway energy storage via said plurality of bidirectional DC-DC converters.