A power converter (10) for operating a first electric machine (12) and a second electric machine (14), comprising: a first converter element (16), a second converter element (18) and a first terminal connection (21), a second terminal connection (22) and a third terminal connection (23) for connecting the power converter (10) to a three-phase energy supply (60), wherein
the first converter element (16) comprises a first rectifier circuit (31) and a second rectifier circuit (32), the second converter element (18) comprises a third rectifier circuit (33), wherein
the first rectifier circuit (31) has a first AC-side pole (51) and a second AC-side pole (52), the second rectifier circuit (32) has a third AC-side pole (53) and a fourth AC-side pole (54) and the third rectifier circuit (33) has a fifth AC-side pole (55) and a sixth AC-side pole (56),
the first rectifier circuit (31) and the second rectifier circuit (32) are connected in parallel on the DC-voltage side and are connected to a common first DC-voltage-side pole (41) and a common second DC-voltage-side pole (42), wherein
the third rectifier circuit (33) is connected on the DC-voltage side to a third DC-voltage-side pole (43) and a fourth DC-voltage-side pole (44), wherein
the first DC-voltage-side pole (41) is at least connectable to the third DC-voltage-side pole (43) by means of a first current path (36) and
the second DC-voltage-side pole (42) is at least connectable to the fourth DC-voltage-side pole (44) by means of a second current path (37), wherein
at least the first current path (36) or the second current path (37) comprises a semiconductor switch (64).

A power converter (10) for operating a first electric machine (12) and a second electric machine (14), comprising: a first converter element (16), a second converter element (18) and a first terminal connection (21), a second terminal connection (22) and a third terminal connection (23) for connecting the power converter (10) to a three-phase energy supply (60), wherein
the first converter element (16) comprises a first rectifier circuit (31) and a second rectifier circuit (32), the second converter element (18) comprises a third rectifier circuit (33), wherein
the first rectifier circuit (31) has a first AC-side pole (51) and a second AC-side pole (52), the second rectifier circuit (32) has a third AC-side pole (53) and a fourth AC-side pole (54) and the third rectifier circuit (33) has a fifth AC-side pole (55) and a sixth AC-side pole (56),
the first rectifier circuit (31) and the second rectifier circuit (32) are connected in parallel on the DC-voltage side and are connected to a common first DC-voltage-side pole (41) and a common second DC-voltage-side pole (42), wherein
the third rectifier circuit (33) is connected on the DC-voltage side to a third DC-voltage-side pole (43) and a fourth DC-voltage-side pole (44), wherein
the first DC-voltage-side pole (41) is at least connectable to the third DC-voltage-side pole (43) by means of a first current path (36) and
the second DC-voltage-side pole (42) is at least connectable to the fourth DC-voltage-side pole (44) by means of a second current path (37), wherein
at least the first current path (36) or the second current path (37) comprises a semiconductor switch (64).

A circuit system for a railroad vehicle according to an embodiment includes a power conversion unit, a first converter, a second converter, a power storage unit, and a control unit. The power conversion unit converts power supplied from an overhead wire into power for driving a motor for running mounted on a railroad vehicle. The first converter converts power supplied from the overhead wire into DC power. The second converter converts power output from the first converter into power for driving a load mounted on the railroad vehicle. The power storage unit is electrically connected to an input side of the second converter. The control unit inputs regenerative power output from the power conversion unit to the first converter and inputs power output from the first converter to the power storage unit in a case where it is determined that the railroad vehicle is being regenerated.

A monorail vehicle includes a chassis supporting a vehicle body that includes a passenger floor, a first side wall, and a second side wall and first and second propulsion systems. Each propulsion system includes an electric motor and a drive wheel coupled to a rotor of the electric motor. Each electric motor and the drive wheel coupled to the rotor of the electric motor are positioned on both sides of an imaginary plane extension of the passenger floor. First and second shells cover portions of the first and second propulsion system. The first shell is positioned proximate to the first side wall and defines a first space between the second side wall. The second shell is positioned proximate to the second side wall and defines a second space between the first side wall.

A monorail vehicle includes a chassis supporting a vehicle body that includes a passenger floor, a first side wall, and a second side wall and first and second propulsion systems. Each propulsion system includes an electric motor and a drive wheel coupled to a rotor of the electric motor. Each electric motor and the drive wheel coupled to the rotor of the electric motor are positioned on both sides of an imaginary plane extension of the passenger floor. First and second shells cover portions of the first and second propulsion system. The first shell is positioned proximate to the first side wall and defines a first space between the second side wall. The second shell is positioned proximate to the second side wall and defines a second space between the first side wall.

A vehicle electrical system for a rail vehicle includes a bus bar, an energy supply unit for feeding electrical energy to the bus bar, a bus bar supply line which is connected to an output side of the energy supply unit and to the bus bar and has a switch, an auxiliary system and a first auxiliary system supply line connected to the bus bar and to the auxiliary system. In order to make it possible to reliably supply the auxiliary system with electrical energy, the vehicle electrical system includes a second auxiliary system supply line which is connected to the auxiliary system and to the output side of the energy supply unit, for bypassing the bus bar. The two auxiliary system supply lines each have a switch. A method for operating a vehicle electrical system and a rail vehicle having the vehicle electrical system are also provided.

A vehicle electrical system for a rail vehicle includes a bus bar, an energy supply unit for feeding electrical energy to the bus bar, a bus bar supply line which is connected to an output side of the energy supply unit and to the bus bar and has a switch, an auxiliary system and a first auxiliary system supply line connected to the bus bar and to the auxiliary system. In order to make it possible to reliably supply the auxiliary system with electrical energy, the vehicle electrical system includes a second auxiliary system supply line which is connected to the auxiliary system and to the output side of the energy supply unit, for bypassing the bus bar. The two auxiliary system supply lines each have a switch. A method for operating a vehicle electrical system and a rail vehicle having the vehicle electrical system are also provided.

A monorail vehicle includes two bogie assemblies supporting different ends of a chassis. Each bogie assembly includes guide wheels rotatably connected to a bogie frame, a wheel assembly for rolling along a top of a guide beam, and a drive unit. The drive unit includes an electric motor attached to the bogie frame via a mounting flange that is located within a first lateral half of the body, a brake unit, and a planetary gear assembly coupled to a rotor of the electric motor. The planetary gear assembly is located on a first side of the electric motor and the wheel assembly is mounted to an output of the planetary gear assembly. The drive unit is attached whereupon the wheel assembly may be dismounted from the drive unit in a direction of a second lateral half of the body without dismounting the drive unit from the bogie frame.

A monorail vehicle includes two bogie assemblies supporting different ends of a chassis. Each bogie assembly includes guide wheels rotatably connected to a bogie frame, a wheel assembly for rolling along a top of a guide beam, and a drive unit. The drive unit includes an electric motor attached to the bogie frame via a mounting flange that is located within a first lateral half of the body, a brake unit, and a planetary gear assembly coupled to a rotor of the electric motor. The planetary gear assembly is located on a first side of the electric motor and the wheel assembly is mounted to an output of the planetary gear assembly. The drive unit is attached whereupon the wheel assembly may be dismounted from the drive unit in a direction of a second lateral half of the body without dismounting the drive unit from the bogie frame.

A voltage estimating device for a power supply line according to one aspect of the present disclosure includes a voltage detector, a current detector, a voltage calculator. The voltage calculator calculates a magnitude of alternating primary voltage that a primary winding in a transformer receives from a power supply line based on a magnitude of tertiary voltage in the transformer detected by the voltage detector, a magnitude of output current in the transformer detected by the current detector, and correlation information. The correlation information indicates a correlation between a voltage ratio and the magnitude of the output current, and the voltage ratio represents a ratio of the magnitude of the primary voltage to the magnitude of the tertiary voltage.