Massive Diesel cargo Locomotive Train driving along power

tMassive Diesel cargo Locomotive Train driving along power tle - In both FIG. 1 and FIG. 2, a diesel engine 1 in a diesel electric locomotive is connected to a main generator 2. This is used for operation of the drive apparatus 3 and is for this purpose connected via a first rectifier 4 to a direct current traction intermediate circuit 5, to which the drive apparatus 3 is connected. The drive apparatus 3 has a converter and a motor.

The diesel engine 1 is also connected to an auxiliary generator 7 in order to operate various auxiliary appliances 6 which, by way of example, may be fans or heaters. This auxiliary generator 7 is electrically connected via a second rectifier 8 to a direct current auxiliary operation intermediate circuit 9, to which the auxiliary appliances 6, the upstream components, such as converters by way of example, are connected.

In order to allow the auxiliary appliances 6 to be supplied with electrical power even when the auxiliary generator 7 is not in operation, the first rectifier 4, which is connected on the input side to the main generator 2, is likewise connected via a DC/DC converter 10 to the direct current auxiliary operation intermediate circuit 9. The DC/DC converter 10 is required since the direct current auxiliary operation intermediate circuit 9 requires a different voltage than the direct current traction intermediate circuit 5.

This provides a redundant electrical power supply for the auxiliary appliances 6. Even when the diesel engine 1 in the locomotive is switched off during braking, electrical power is available for the direct current auxiliary operation intermediate circuit 9 because the electric motor for the drive apparatus 3 is operated as a generator by the train that is still rolling, thus producing electrical power via the converter in the drive apparatus 3 and via the DC/DC converter 10 for the auxiliary appliances 6.

A corresponding direct current auxiliary operation intermediate circuit in another coupled locomotive can be connected to the direct current auxiliary operation intermediate circuit 9 on both sides, via couplings 11. In consequence, if the train is being drawn by two or more locomotives, the auxiliary appliances 6 can also be supplied from a coupled locomotive.

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