An electrically driveable vehicle, in particular a rail vehicle, includes an intermediate DC circuit, an in-vehicle, three-phase on-board electrical system fed by the intermediate DC circuit, at least one drive motor fed by a converter, and at least one coolant pump for pumping a coolant that cools the converter. In addition to the in-vehicle three-phase on-board electrical system, the vehicle also has a second on-board electrical system. The at least one coolant pump is connected to the second on-board electrical system.

An electrically driveable vehicle, in particular a rail vehicle, includes an intermediate DC circuit, an in-vehicle, three-phase on-board electrical system fed by the intermediate DC circuit, at least one drive motor fed by a converter, and at least one coolant pump for pumping a coolant that cools the converter. In addition to the in-vehicle three-phase on-board electrical system, the vehicle also has a second on-board electrical system. The at least one coolant pump is connected to the second on-board electrical system.

An auxiliary power source device for a vehicle is incorporated in an electric vehicle and includes a three-phase inverter that converts an input DC voltage into a desired three-phase AC voltage and applies the three-phase AC voltage to a load. The auxiliary power source device further includes a filter reactor that is connected to respective output terminals of a three-phase inverter, a filter capacitor that is connected in a Y-shape at an end on a load side of the filter reactor and is not grounded at a neutral point, and a three-phase transformer that includes primary windings that are connected in a Y-shape at the end on the load side of the filter reactor and is grounded at a neutral point and secondary windings that are connected in a delta shape.

An auxiliary power source device for a vehicle is incorporated in an electric vehicle and includes a three-phase inverter that converts an input DC voltage into a desired three-phase AC voltage and applies the three-phase AC voltage to a load. The auxiliary power source device further includes a filter reactor that is connected to respective output terminals of a three-phase inverter, a filter capacitor that is connected in a Y-shape at an end on a load side of the filter reactor and is not grounded at a neutral point, and a three-phase transformer that includes primary windings that are connected in a Y-shape at the end on the load side of the filter reactor and is grounded at a neutral point and secondary windings that are connected in a delta shape.

An electric machine is selectively operated as a transformer for AC voltage operation or as a throttle system for DC voltage operation. A transformer core has two limbs. An additional winding with a first additional partial winding is wound around a first limb and a second additional winding is wound around the second limb. A higher-voltage winding with a first higher-voltage partial winding is wound around the first additional partial winding and a second higher-voltage partial winding is wound around the second additional partial winding. A first traction winding is wound around the first higher-voltage partial winding and a second traction winding is wound around the second higher-voltage partial winding. A first DC voltage winding may be wound around the first traction winding and a second DC voltage winding may be wound around the second traction winding.

An electric machine is selectively operated as a transformer for AC voltage operation or as a throttle system for DC voltage operation. A transformer core has two limbs. An additional winding with a first additional partial winding is wound around a first limb and a second additional winding is wound around the second limb. A higher-voltage winding with a first higher-voltage partial winding is wound around the first additional partial winding and a second higher-voltage partial winding is wound around the second additional partial winding. A first traction winding is wound around the first higher-voltage partial winding and a second traction winding is wound around the second higher-voltage partial winding. A first DC voltage winding may be wound around the first traction winding and a second DC voltage winding may be wound around the second traction winding.

An electrically driveable vehicle, in particular a rail vehicle, includes an intermediate DC circuit, an in-vehicle, three-phase on-board electrical system fed by the intermediate DC circuit, at least one drive motor fed by a converter, and at least one coolant pump for pumping a coolant that cools the converter. In addition to the in-vehicle three-phase on-board electrical system, the vehicle also has a second on-board electrical system. The at least one coolant pump is connected to the second on-board electrical system.

An electrically driveable vehicle, in particular a rail vehicle, includes an intermediate DC circuit, an in-vehicle, three-phase on-board electrical system fed by the intermediate DC circuit, at least one drive motor fed by a converter, and at least one coolant pump for pumping a coolant that cools the converter. In addition to the in-vehicle three-phase on-board electrical system, the vehicle also has a second on-board electrical system. The at least one coolant pump is connected to the second on-board electrical system.

A locomotive propulsion system onboard a locomotive platform includes a traction motor, a propulsion electrical storage device, an ancillary electrical storage device, and a controller. The propulsion electrical storage device is electrically connected to the traction motor via a propulsion circuit, and the ancillary electrical storage device is electrically connected to the traction motor via an ancillary circuit. The controller is configured to direct the ancillary electrical storage device to supply electric current to the traction motor via the ancillary circuit to power the traction motor during an elevated demand period. At an end of the elevated demand period, the controller is configured to control the ancillary circuit to stop conducting electric current from the ancillary electrical storage device and to direct the propulsion electrical storage device to supply electric current to the traction motor via the propulsion circuit to power the traction motor.

A locomotive propulsion system onboard a locomotive platform includes a traction motor, a propulsion electrical storage device, an ancillary electrical storage device, and a controller. The propulsion electrical storage device is electrically connected to the traction motor via a propulsion circuit, and the ancillary electrical storage device is electrically connected to the traction motor via an ancillary circuit. The controller is configured to direct the ancillary electrical storage device to supply electric current to the traction motor via the ancillary circuit to power the traction motor during an elevated demand period. At an end of the elevated demand period, the controller is configured to control the ancillary circuit to stop conducting electric current from the ancillary electrical storage device and to direct the propulsion electrical storage device to supply electric current to the traction motor via the propulsion circuit to power the traction motor.