Abstract: A high speed train power unit comprising: carbody that comprises: a roof; a floor; a driver's cab at a front end of the carbody; and a technical compartment that comprises: a low voltage zone that comprises an air conditioning unit designed to condition the driver's cab, wherein the air conditioning unit is on the roof, a traction zone that comprises a rheostatic brake on the roof, and a technical zone, wherein the low voltage zone, the traction zone, and the technical zone of the technical compartment are respectively located next to each other along a longitudinal axis of the power unit; at least two bogies mounted under the floor of the carbody; and a main transformer located under the carbody between the bogies.

Abstract: A high speed train power unit comprising: carbody that comprises: a roof; a floor; a driver's cab at a front end of the carbody; and a technical compartment that comprises: a low voltage zone that comprises an air conditioning unit designed to condition the driver's cab, wherein the air conditioning unit is on the roof, a traction zone that comprises a rheostatic brake on the roof, and a technical zone, wherein the low voltage zone, the traction zone, and the technical zone of the technical compartment are respectively located next to each other along a longitudinal axis of the power unit; at least two bogies mounted under the floor of the carbody; and a main transformer located under the carbody between the bogies.

Abstract: The diesel-electric locomotive (10) includes: a diesel engine (12), an alternator (20) mechanically coupled for driving thereof to the diesel engine (12) and connected as output to a direct current bus (26) through a rectifier (22), at least one electric traction motor (14) connected to the bus (26) through a traction inverter (34), at least one piece of auxiliary equipment (16, 18) with a power supply, powered from the diesel engine (12). It includes, to power the or each piece of auxiliary equipment (16, 18), a chain (80) for shaping the current connected as input to the direct current bus (26).

Abstract: The diesel-electric locomotive (10) includes: a diesel engine (12), an alternator (20) mechanically coupled for driving thereof to the diesel engine (12) and connected as output to a direct current bus (26) through a rectifier (22), at least one electric traction motor (14) connected to the bus (26) through a traction inverter (34), at least one piece of auxiliary equipment (16, 18) with a power supply, powered from the diesel engine (12). It includes, to power the or each piece of auxiliary equipment (16, 18), a chain (80) for shaping the current connected as input to the direct current bus (26).

Abstract: A method for supplying electrical power to a DC supply bus of a rotating electric motor of an electric vehicle is provided. The method includes the steps of selectively supplying electrical power to the bus via a first power supply at a first alternating voltage and selectively supplying electrical power to the bus via a second power supply at a second alternating voltage that is less than the first alternating voltage.

Abstract: This method maintains a direct voltage at the input of a DC/AC voltage converter in order to maintain an asynchronous motor in a magnetised state, the input of the converter being connected to a DC supply bus of an electric vehicle, and comprises, in a free wheel mode during which the vehicle coasts and the bus is disconnected from a catenary: a) a step (76) for magnetising the motor, then b) a step (78) for operating the motor as a generator of alternating voltage, then c) a step (72) for stopping the converter when the direct voltage of the bus reaches an upper threshold, then d) a step (74) for maintaining the converter in the idle state as long as the direct voltage of the bus remains higher than a minimum direct magnetisation voltage of the asynchronous motor.

Abstract: This method maintains a direct voltage at the input of a DC/AC voltage converter in order to maintain an asynchronous motor in a magnetised state, the input of the converter being connected to a DC supply bus of an electric vehicle, and comprises, in a free wheel mode during which the vehicle coasts and the bus is disconnected from a catenary: a) a step (76) for magnetising the motor, then b) a step (78) for operating the motor as a generator of alternating voltage, then c) a step (72) for stopping the converter when the direct voltage of the bus reaches an upper threshold, then d) a step (74) for maintaining the converter in the idle state as long as the direct voltage of the bus remains higher than a minimum direct magnetisation voltage of the asynchronous motor.

Abstract: This method for supplying electrical power to a DC supply bus of a rotating electric motor of an electric vehicle comprises, when the bus is supplied with electrical power from a second catenary: a step (84) for controlling the closure of a precharge switch in order to connect the bus to a first terminal by way of the same current limitation means which is also used when electrical power is supplied from a first catenary which supplies a higher voltage than that supplied by the second catenary, a step (90) for controlling the rectifier/booster in order to rectify and increase the alternating voltage supplied by the first terminal and supply the bus with the voltage which has been rectified and increased in this manner, then a step (92) for disconnecting the bus from the first terminal and a step (94) for controlling the closure of a second isolating switch in order to connect the bus to the second terminal without passing via the precharge circuit.