Abstract: A power system for a locomotive includes a dynamic brake (DB) grid, at least one chopper circuit, and a controller. The locomotive includes at least one traction motor to power one or more loads during a braking of the locomotive. The DB grid includes at least one resistor bank and is configured to dissipate at least a portion of the power generated by the traction motor. The chopper circuit includes a three-phase inverter module, and selectively disables an electrical communication between the resistor bank and the traction motor. The controller is coupled to the chopper circuit and the loads. The controller determines a magnitude of the loads, and controls the chopper circuit to disable an electrical communication between the resistor bank and the traction motor for a predetermined duration to control a portion of the power dissipated by the DB grid to meet the magnitude of the loads.

Abstract: A power system for a locomotive includes a dynamic brake (DB) grid, at least one chopper circuit, and a controller. The locomotive includes at least one traction motor to power one or more loads during a braking of the locomotive. The DB grid includes at least one resistor bank and is configured to dissipate at least a portion of the power generated by the traction motor. The chopper circuit includes a three-phase inverter module, and selectively disables an electrical communication between the resistor bank and the traction motor. The controller is coupled to the chopper circuit and the loads. The controller determines a magnitude of the loads, and controls the chopper circuit to disable an electrical communication between the resistor bank and the traction motor for a predetermined duration to control a portion of the power dissipated by the DB grid to meet the magnitude of the loads.

Abstract: A power system for a locomotive. The power system has a first power unit, a second power unit, a first inverter configured to power the first power unit or the second power unit, a second inverter configured to power the first power unit or the second power unit. Further the power system has a first controller selectively coupled to one of the first inverter or the second inverter to control the operation of the first inverter or the second inverter and a second controller selectively coupled to one of the first inverter or the second inverter to control the operation of the first inverter or the second inverter.

Abstract: A power system for a locomotive. The power system includes an alternator, a first inverter system, a traction motor, a second inverter system and an auxiliary power unit. The first inverter system is coupled to the alternator and receives high voltage power from the alternator. The traction motor is coupled to the first inverter system receives high voltage power from the first inverter system. The second inverter system is also coupled to the alternator. The second inverter system steps down the high voltage power from the alternator. The auxiliary power unit is coupled to the second inverter system and receives the stepped down voltage power from the second inverter system.

Abstract: The present disclosure provides for a power system for a locomotive. The power system includes an engine, a first alternator, a second alternator and an inverter module. The first alternator operatively coupled to the engine and configured to provide electrical power to one or more traction motors. The second alternator operatively coupled to the engine and configured to provide electrical power to one or more auxiliary loads. The inverter module configured to selectively couple to an energy storage device to provide electrical power to the first alternator for cranking the engine and to a DC link to provide electrical power to the auxiliary load during regenerative braking of the traction motor.

Abstract: A power system for a locomotive. The power system has a first power unit, a second power unit, a first inverter configured to power the first power unit or the second power unit, a second inverter configured to power the first power unit or the second power unit. Further the power system has a first controller selectively coupled to one of the first inverter or the second inverter to control the operation of the first inverter or the second inverter and a second controller selectively coupled to one of the first inverter or the second inverter to control the operation of the first inverter or the second inverter.

Abstract: A self-excitation system for a locomotive having at least a primary mover is provided. The self-excitation system may include a traction alternator, a permanent magnet machine, and a chopper circuit. The traction alternator may include an alternator stator and an alternator rotor mechanically coupled to a drive shaft of the primary mover. The permanent magnet machine may include a machine stator and a machine rotor mechanically coupled to the drive shaft. The chopper circuit may be configured to receive electrical signals from the machine stator and control a field excitation of the traction alternator.

Abstract: The disclosure an integrated traction system for a locomotive. The system includes a primary electrical energy source, a traction load circuit, an auxiliary load circuit, a common DC link, s secondary electrical energy, and a controller. The electrical energy generated by the primary electrical energy source is shared between the traction load circuit and the auxiliary load circuit during a power mode through the common DC link. Further, the electrical energy form the secondary electrical energy source is supplied to the primary electrically energy source during cranking mode. The controller controls the switching of the integrated traction system between the two modes.