A method for a dynamic inductive wireless power transmission includes providing an AC/DC power converter that receives three-phase power and provides regulated DC output current, connecting a trunk cable to the AC/DC power converter output and to multiple power transmitter modules. The trunk cable connects inputs of the power transmitter modules in series. The power transmitter modules transmit inductive wireless power over an air gap. The method includes providing a system controller that detects a vehicle containing a receiver coil and confirms if the vehicle should receive the inductive wireless power from the multiple power transmitter modules, and includes configuring the system controller to communicate with the AC/DC power converter to maintain the regulated DC output current at a constant value and transmit the inductive wireless power to the vehicle through the multiple power transmitter modules when the vehicle should receive the inductive wireless power.

A method and system for configuring regenerative braking energy recovery devices in urban rail transit provided by the present application, successively including the following steps: calculating a preliminarily configured capacity P.sub.n of a regenerative braking energy recovery device predetermined for the traction substation n, then obtaining an optimally configured capacity Q.sub.n of the regenerative braking energy recovery devices; further, configuring the total number of the regenerative braking energy recovery devices; finally, configuring the type of the regenerative braking energy recovery devices. By reasonably configure the capacity and number of regenerative braking energy recovery devices in traction substations, the configuring method of the present application allows the regenerative braking energy generated by a train during braking to be completely absorbed, thus reduce the energy consumption of braking resistors. Meanwhile, the waste of idle regenerative braking energy recovery devices is avoided, and the acquisition cost of devices is reduced. By reasonably configuring the type of regenerative braking energy recovery devices, the deficiencies of a single regenerative braking energy recovery device can be avoided.

A system for controlling a cooling unit of a transformer, more particularly a traction transformer of a rail vehicle, improves the efficiency and lifespan of the transformer having the cooling unit. The system includes a transformer, a cooling unit configured to cool the transformer, and a control unit configured to control the cooling unit for cooling the transformer. The control unit is configured to control the cooling unit using measurement data representing at least one condition of the system and/or using environmental data in anticipation of a change in the temperature of the transformer based on the utilization of the transformer and/or environmental influences. This prevents the transformer from overheating, thereby increasing the efficiency and lifespan of the transformer. A corresponding method for controlling a system is also provided.

According to an embodiment, a power supply system for an electric motor car includes a first terminal, a second terminal, and a conversion unit. The first terminal is electrically connected to one of a power storage device and an overhead wire provided within a formation of electric motor cars. The second terminal is electrically connected to a lead wire together with a plurality of electric motors within the formation, a host power supply device, an external power supply device different from the host power supply device. The conversion unit receives first electric power supplied from the plurality of electric motors and the external power supply device via the second terminal and causes a direct current (DC) voltage to be generated at the first terminal according to a regenerative operation of the conversion unit to charge the power storage device in a first operation state and receives second electric power supplied from one of the power storage device and the overhead wire via the first terminal, converts a part of the second electric power into third electric power according to a powered operation of the conversion unit, and outputs the third electric power from the second terminal in a second operation state, thereby converting electric power.

According to an embodiment, a power supply system for an electric motor car includes a first terminal, a second terminal, and a conversion unit. The first terminal is electrically connected to one of a power storage device and an overhead wire provided within a formation of electric motor cars. The second terminal is electrically connected to a lead wire together with a plurality of electric motors within the formation, a host power supply device, an external power supply device different from the host power supply device. The conversion unit receives first electric power supplied from the plurality of electric motors and the external power supply device via the second terminal and causes a direct current (DC) voltage to be generated at the first terminal according to a regenerative operation of the conversion unit to charge the power storage device in a first operation state and receives second electric power supplied from one of the power storage device and the overhead wire via the first terminal, converts a part of the second electric power into third electric power according to a powered operation of the conversion unit, and outputs the third electric power from the second terminal in a second operation state, thereby converting electric power.

An electric vehicle, in particular a rail vehicle, with a current collection device (2). The current collection device has at least one contact device (2a, 2b). An electrically conductive contact, of the current collection device (2) to an external power supply (1), can be achieved by the contact device (2a, 2b). The vehicle comprises a DC link (11) and at least one electric traction motor (10). During normal driving operation, the current is conducted from the current collection device (2), via the DC link (11), into the one of the traction motors (10) and a current connection is formed between the contact device (2a, 2b) and the DC link (11). The current connection is at least partially bidirectional. A disconnecting device (5) is arranged between contact device (2a, 2b) and DC link (11). The disconnecting device (5) is designed to be interrupted unidirectionally.

A method and apparatus for magnetically latching a charging port to an electric vehicle by first positioning a power receiver connector installed on the electric vehicle near a power source connector. The power source connector that is allowed to move around in three dimensional space, facilitating the alignment of the power source connector with the power receiver connector using a magnetic force. The magnetic forces also use to latch the power source connector to the power receiver connector. At this point, contacts included in the two connectors are engaged in order to provide a temporary conductive charging path.

A system is provided for inductively charging the battery of an electric vehicle as it travels along a roadway. The system comprises a series of asphalt paving seam gaskets within which are embedded magnetic field generators. The magnetic field generator gaskets are arranged with opposite polarities exposed on either side of each of the charging lanes, so that induction wires within the vehicle transect the magnetic field lines and generate an electric current to charge the vehicle battery. Energy generated and/or distance travelled in the charging lanes can be metered and reported in order to impose user fees.

To provide a semiconductor device signal transmission circuit for drive-control, a method of controlling a semiconductor device signal transmission circuit for drive-control, a semiconductor device, a power conversion device, and an electric system for a railway vehicle capable of preventing malfunction due to noise while speeding up or reducing loss of a switching operation. The semiconductor device signal transmission circuit for drive-control that is connected between a semiconductor device constituting an arm in a power conversion device and a drive circuit configured to drive the semiconductor device, including: an inductor; and an impedance circuit including a switch and connected in parallel with the inductor.

A power accumulation system includes a power accumulation device, a relay device provided in a pair of power lines disposed between the power accumulation device and a power conversion device that exchanges power with the power accumulation device, a capacitor provided between the pair of power lines between the relay device and the power conversion device and an electronic control device that controls the relay device. The electronic control device is configured to execute a predetermined foreign matter removal process when it is not possible to bring one of a first relay and a second relay from a power blocking state to a conductive state.