Abstract: A method, system, and apparatus including an electric machine having a plurality of rotor bars and a first coupling component configured to electrically couple the plurality of rotor bars together. Each rotor bar of the plurality of rotor bars includes a first metallic material having a first electrical resistivity and a second metallic material cast about the first material, where the second metallic material has a second electrical resistivity greater than the first electrical resistivity. The first metallic material has a first end and a second end opposite the first end and the first coupling component is coupled to the first end of the first metallic material.

Abstract: A vehicle propulsion system includes a first bi-directional DC-DC converter coupled to a first DC bus, an energy storage system comprising at least one energy storage unit coupled to the first bi-directional DC-DC converter, a first DC-to-AC inverter coupled to the first DC bus, and a first electromechanical device coupled to the first DC-to-AC inverter. A controller is programmed to determine a real-time operating speed of the first electromechanical device, compare the real-time operating speed of the first electromechanical device to a scheduled speed of the first electromechanical device, and selectively control the first bi-directional DC-DC converter to shift a voltage of the first DC bus based on the comparison.

Abstract: A bi-directional DC-DC converter assembly that processes and transfers differential power in a variable manner is disclosed. The converter assembly is coupled to an energy storage device and DC link, with the converter assembly including a first converter section coupled to the energy storage device and a second converter section coupled to the DC link and to the energy storage device. The converter assembly processes a first portion of the DC power output of the energy storage device and provides an unprocessed second portion of the DC power output of the energy storage device to the second converter section when providing power to the load, and processes a first portion of a regenerative power from the load and provides an unprocessed second portion of the regenerative power from the load to the first converter section when providing regenerative power to the energy storage device.

Abstract: An apparatus for transferring energy using onboard power electronics with high-frequency transformer isolation includes a power electronic drive circuit comprises a dc bus and a first energy storage device coupled to the dc bus. A first bi-directional dc-to-ac voltage inverter is coupled to the first energy storage device and to the dc bus, and a first electromechanical device coupled to the first bi-directional dc-to-ac voltage inverter. A charging system coupled to the dc bus via a charge bus comprises a receptacle configured to mate with a connector coupled to a voltage source external to the power electronic drive circuit and an isolation transformer configured to electrically isolate the charge bus from the receptacle. A controller configured to cause the charging system to supply a charging voltage to the dc bus based on a voltage received from the voltage source external to the power electronic drive circuit.

Abstract: The present invention relates to an energy management system including a motor, an inverter electrically connected to the motor, a DC-DC converter electrically connected to the inverter, a first energy storage unit electrically connected to a DC link of the inverter through the DC-DC converter, a second energy storage unit coupled to the inverter, and a control unit. The control unit is configured to control the distribution of electrical power from the first energy storage unit and the second energy storage unit to the inverter in dependence upon a predetermined power threshold.

Abstract: An embodiment of the present invention relates to a system. The system includes a vehicle having primary energy storage device for providing the vehicle with a supply of electrical power, a remote opportunity charging device configured to be removably connected to vehicle and configured to selectively charge the primary energy storage device of the vehicle during vehicle operation, and an interface between the vehicle and the remote opportunity charging device. The interface is configured to enable the transfer of electrical power from the remote opportunity charging device to the vehicle.

Abstract: According to an aspect of the invention, a motor drive circuit includes a first energy storage device configured to supply electrical energy, a bi-directional DC-to-DC voltage converter coupled to the first energy storage device, a voltage inverter coupled to the bi-directional DC-to-DC voltage converter, and an input device configured to receive electrical energy from an external energy source. The motor drive circuit further includes a coupling system coupled to the input device, to the first energy storage device, and to the bi-directional DC-to-DC voltage converter. The coupling system has a first configuration configured to transfer electrical energy to the first energy storage device via the bi-directional DC-to-DC voltage converter, and has a second configuration configured to transfer electrical energy from the first energy storage device to the voltage inverter via the bi-directional DC-to-DC voltage converter.

Abstract: A direct current (DC) electric system includes a DC link, a first energy storage system (ESS), a second ESS, a coupling device, and a bidirectional DC-DC power converter. The first ESS is coupled to the DC link and stores energy for output at a first nominal voltage. The second ESS stores energy for output at a second nominal voltage greater than the first nominal voltage. A second ESS low side is coupled to a DC link low side. The coupling device is coupled between a second ESS high side and a DC link high side. The coupling device selectively transfers energy from the second ESS to the DC link. The bidirectional DC-DC power converter selectively transfers energy from the second ESS to the DC link and from the DC link to the second energy storage system.

Abstract: A vehicular energy management system (EMS) determines a net total power from a traction drive load, an auxiliary device load, and a regenerative power. If the net total power is a net supply power, the EMS causes regenerative power to be provided to a power source and energy source in a controlled manner to initially charge the power source to a desired state-of-charge (SOC) and then subsequently charge the energy source. If the net total power comprises a net power load, the EMS causes power to be drawn from the power source and the energy source, with a split of the power being drawn from the power source and the energy source being based on a magnitude of the net power load. The EMS adjusts/maintains the SOC set-point of the power source and the DC link voltage based on vehicle speed and relative altitude of travel of the vehicle.

Abstract: An apparatus for transferring energy using onboard power electronics with high-frequency transformer isolation includes a power electronic drive circuit comprises a dc bus and a first energy storage device coupled to the dc bus. A first bi-directional dc-to-ac voltage inverter is coupled to the first energy storage device and to the dc bus, and a first electromechanical device coupled to the first bi-directional dc-to-ac voltage inverter. A charging system coupled to the dc bus via a charge bus comprises a receptacle configured to mate with a connector coupled to a voltage source external to the power electronic drive circuit and an isolation transformer configured to electrically isolate the charge bus from the receptacle. A controller configured to cause the charging system to supply a charging voltage to the dc bus based on a voltage received from the voltage source external to the power electronic drive circuit.

Abstract: A control system for controlling the supply of power from an energy storage system to a DC bus of a vehicle propulsion system is disclosed herein. The control system includes a controller programmed to monitor real-time operating parameters of a plurality of energy storage units of the energy storage system, access degradation models for the plurality of energy storage units, and optimize usage of the plurality of energy storage units during real-time operation of the vehicle propulsion system based on the degradation models.

Abstract: A vehicle propulsion system includes a first bi-directional DC-DC converter coupled to a first DC bus, an energy storage system comprising at least one energy storage unit coupled to the first bi-directional DC-DC converter, a first DC-to-AC inverter coupled to the first DC bus, and a first electromechanical device coupled to the first DC-to-AC inverter. A controller is programmed to determine a real-time operating speed of the first electromechanical device, compare the real-time operating speed of the first electromechanical device to a scheduled speed of the first electromechanical device, and selectively control the first bi-directional DC-DC converter to shift a voltage of the first DC bus based on the comparison.

Abstract: A distribution transformer comprises a sensor system and a communications module. The distribution transformer is configured to convert a first high voltage electricity from a high voltage distribution line to a first low voltage electricity and convey the first low voltage electricity along a low voltage line to an electrical device. The sensor system is configured to determine a temperature of the distribution transformer, and the communications module is configured to transmit a load reduction request along the low voltage line to the electrical device based on the temperature of the distribution transformer.

Abstract: A system and method for electrical charging is disclosed. The electrical charging system comprises a first charging coil and an energy storage device coupled to the first charging coil. The energy charging system further comprises an energy charging station comprising a second charging coil disposed on a movable positioner, wherein the second charging coil is coupleable to an electrical energy source, at least one drive mechanism configured to translate the movable positioned, and a system controller. The system controller is configured to detect an event indicative of a proximity of the first charging coil to the energy charging station, translate the movable positioner such that the second charging coil is substantially aligned with, and closely spaced apart from, the first charging coil to form an electrical transformer, and initiate a charging cycle configured to transfer electrical energy to the at least one energy storage device via the electrical transformer.

Abstract: A three port DC-DC converter connectable to multiple energy sources and loads to allocate power therebetween is disclosed. The three port DC-DC converter includes an arrangement of switching devices consisting of a first switching device, a second switching device, and a third switching device. The three port DC-DC converter also includes a pair of input channels that provide current to the arrangement of switching devices, with the pair of input channels connected to and receiving or sending power from or to a plurality of energy sources or loads. The three port DC-DC converter further includes an output channel that outputs a controlled power from or to the three port DC-DC converter. The first switching device, the second switching device, and the third switching device are selectively controllable to provide a controlled power to the output channel from the plurality of energy sources or loads connected to the input channels.

Abstract: A method of operating a vehicle having an electric drive is provided. The method includes defining a first zone and a second zone. The first zone has an associated first characteristic and the second zone has an associated second characteristic that differs from the first characteristic. The method further includes switching an operating mode of a vehicle from a first operating mode in the first zone to a second operating mode in the second zone in response to the vehicle translating from the first zone to the second zone. Associated vehicles and systems are provided also.

Abstract: A drive circuit comprising a DC bus configured to supply power to a load, a first fuel cell coupled to the DC bus and configured to provide a first power output to the DC bus, and a second fuel cell coupled to the DC bus and configured to provide a second power output to the DC bus supplemental to the first fuel cell. The drive circuit further includes an energy storage device coupled to the DC bus and configured to receive energy from the DC bus when a combined output of the first and second fuel cells is greater than a power demand from a load, and provide energy to the DC bus when the combined output of the first and second fuel cells is less than the power demand from the load.

Abstract: An apparatus for rapid charging using onboard power electronics includes a DC bus, a first energy storage device coupled to the DC bus and configured to output a DC voltage, a first bi-directional voltage modification assembly coupled to the DC bus, and a high-impedance voltage source coupleable to the DC bus. The apparatus further includes a charging system having a first receptacle coupled to the DC bus and a second receptacle coupled to the first bi-directional voltage modification assembly. The first receptacle is constructed to mate with a first connector coupled to the high-impedance voltage source and the second receptacle is constructed to mate with a second connector coupled to the high-impedance voltage source. A controller is programmed to control a simultaneous transfer of charging energy through the first and second receptacles of the charging system to the DC bus.

Abstract: According to an aspect of the invention, a motor drive circuit includes a first energy storage device configured to supply electrical energy, a bi-directional DC-to-DC voltage converter coupled to the first energy storage device, a voltage inverter coupled to the bi-directional DC-to-DC voltage converter, and an input device configured to receive electrical energy from an external energy source. The motor drive circuit further includes a coupling system coupled to the input device, to the first energy storage device, and to the bi-directional DC-to-DC voltage converter. The coupling system has a first configuration configured to transfer electrical energy to the first energy storage device via the bi-directional DC-to-DC voltage converter, and has a second configuration configured to transfer electrical energy from the first energy storage device to the voltage inverter via the bi-directional DC-to-DC voltage converter.

Abstract: An apparatus includes a transmission, an engine coupled to an input side of the transmission, and an electromechanical device coupled to an output side of the transmission. The apparatus also includes a differential coupled to the output side of the electromechanical device and a controller coupled to the electromechanical device. The controller is programmed to receive a travel range estimate and control operation of the electromechanical device based on the travel range estimate.