Abstract: A laminated DC busbar, a DC backplane and a DC busbar system with super low inductance is provided. Semiconductor switches may be connected to respective laminated DC busbars. The DC busbar system comprises a DC backplane and at least two laminated DC busbars respectively connected to semiconductor switches. The round-trip inductance between semiconductor switches connected to two adjacent laminated DC busbars via the DC backplane is less than about 7.

Abstract: A cabling system having a shielded cable for connecting an inverter and an electric machine is provided. The conductive shielding is connectable, either directly or indirectly, to the chassis of the inverter and the chassis of the electric machine such as indirectly, via a cable connector chassis. The cabling system further comprise high pass filter which comprises capacitance electrically connected to the conductive shielding configured to attenuated current less than a predetermined frequency from coupling to the conductive shielding. The attenuation is achieved via a frequency dependent current limiting impedance of the capacitance. The current less than the predetermined frequency is caused by torque producing current and/or flux modifying current. The cable connector chassis may comprise at least one high pass filter to connect serially with at least one cable inserted therein, respectively.

Abstract: A laminated DC busbar, a DC backplane and a DC busbar system with super low inductance is provided. Semiconductor switches may be connected to respective laminated DC busbars. The DC busbar system comprises a DC backplane and at least two laminated DC busbars respectively connected to semiconductor switches. The round-trip inductance between semiconductor switches connected to two adjacent laminated DC busbars via the DC backplane is less than about 7.5 nH.

Abstract: An AC busbar for connecting at least three phases from a semiconductor switching unit to a load is provided. The AC busbar parallelly connects the at least three phases and provides current balancing. The AC busbar has a terminal-side conductor mechanically connectable to each AC terminal of the semiconductor switching unit and a load-side conductor positioned between the terminal-side conductor and the load. A distance between the terminal-side conductor and the load-side conductor is such that a difference in an inductance between a connection point for a respective AC terminal of each phase and a common point on a middle of the load-side conductor is less than a predetermined percentage with respect to an average of the respective inductances.

Abstract: An energy management system (EMS) for an aircraft is provided. The aircraft may have one of a plurality of propulsion systems such as a parallel hybrid electric propulsion system, a parallel turbo electric propulsion system, an electric propulsion system, a turbo electric propulsion system and a turbo hybrid electric propulsion system. The EMS comprises redundant control paths for controlling safety critical operation. Each redundant control path is configured to independently determine whether to electrically isolate a line replaceable unit (LRU) from a high voltage DC link (HVDC link) based on status information from the LRU. The isolation is based on the independent determination. The HVDC link is used for propulsion. The number of the redundant control paths and components may be depending on the type of the propulsion system.

Abstract: A system for partially pre-charging an electrical power system having a high voltage power source, a DC link device with a DC Link capacitor, a low voltage power source and a DC/DC converter. In one embodiment a partial pre-charge of the DC Link capacitor can be achieved in three ways: first, through a DC/DC converter boosting from the low voltage power source, second, through a first circuit provided to charge the DC link capacitor to a partial pre-charge state using the voltage directly from the low voltage power source, and third, through a second circuit provided to limit current flowing to the DC link capacitor from the high voltage power source to charge the DC Link capacitor only to a partial pre-charge level.

Abstract: A high voltage measurement port and a circuit contact wire assembly for vehicle high-voltage power decommissioning. The high voltage measurement port includes four externally accessible pins for obtaining an electrical characteristic measurement of a connected circuit. For redundancy, the assembly includes a resistor between a first measurement port pin and a first positive DC busbar at a first location, a resistor between a second pin and the first DC busbar at a second location different from the first location, a resistor between a third pin and a second negative DC busbar at a first location, and a resistor between a fourth pin and the second DC busbar at a second location different from the first location. Via the high voltage measurement port, a multi-meter can verify each resistance connection between the positive pins and then again between negative pins before a differential voltage measurement is made between positive and negative.

Abstract: A system for controlling load sharing between multiple generators mechanically coupleable to the output shaft of a prime mover is provided. The system may comprise a first processor; and at least two inverters operably connectable to at least two generators, respectively. The generators provide AC power to the respective inverter and each inverter provides DC power to a respective DC link. Each inverter may comprise a processor configured to control a respective generator. The processor may be configured to receive a common speed command from the first processor, adjust the common speed command based on a speed of the same output shaft to create a droop, determine a torque command based on the adjusted speed command and supply the determined torque command to the corresponding generator.

Abstract: A high voltage measurement port and a circuit contact wire assembly for vehicle high-voltage power decommissioning. The high voltage measurement port includes four externally accessible pins for obtaining an electrical characteristic measurement of a connected circuit. For redundancy, the assembly includes a resistor between a first measurement port pin and a first positive DC busbar at a first location, a resistor between a second pin and the first DC busbar at a second location different from the first location, a resistor between a third pin and a second negative DC busbar at a first location, and a resistor between a fourth pin and the second DC busbar at a second location different from the first location. Via the high voltage measurement port, a multi-meter can verify each resistance connection between the positive pins and then again between negative pins before a differential voltage measurement is made between positive and negative.

Abstract: A polyphase cable includes a first conductor, a first shield including conductive material coaxially around the first conductor, and a first insulating material between and separating the first conductor and the first shield. The polyphase cable further includes a second conductor, a second shield including conductive material coaxially around the second conductor, and a second insulating material between and separating the second conductor and the second shield. In an example, the first shield is in physical contact, and in electrical contact, with the second shield. In an example, the polyphase cable is configured to conduct polyphase Alternating Current (AC) having a frequency of at least 100 Hertz (Hz) and/or at most 10,000 Hz. In an example, one or both of a first end and a second end of one or both of the first shield and the second shield are configured to be grounded.

Abstract: A cabling system having a shielded cable for connecting an inverter and an electric machine is provided. The conductive shielding is connectable, either directly or indirectly, to the chassis of the inverter and the chassis of the electric machine such as indirectly, via a cable connector chassis. The cabling system further comprise high pass filter which comprises capacitance electrically connected to the conductive shielding configured to attenuated current less than a predetermined frequency from coupling to the conductive shielding. The attenuation is achieved via a frequency dependent current limiting impedance of the capacitance. The current less than the predetermined frequency is caused by torque producing current and/or flux modifying current. The cable connector chassis may comprise at least one high pass filter to connect serially with at least one cable inserted therein, respectively.

Abstract: A laminated DC busbar, a DC backplane and a DC busbar system with super low inductance is provided. Semiconductor switches may be connected to respective laminated DC busbars. The DC busbar system comprises a DC backplane and at least two laminated DC busbars respectively connected to semiconductor switches. The round-trip inductance between semiconductor switches connected to two adjacent laminated DC busbars via the DC backplane is less than about 7.

Abstract: An AC busbar for connecting at least three phases from a semiconductor switching unit to a load is provided. The AC busbar parallelly connects the at least three phases and provides current balancing. The AC busbar has a terminal-side conductor mechanically connectable to each AC terminal of the semiconductor switching unit and a load-side conductor positioned between the terminal-side conductor and the load. A distance between the terminal-side conductor and the load-side conductor is such that a difference in an inductance between a connection point for a respective AC terminal of each phase and a common point on a middle of the load-side conductor is less than a predetermined percentage with respect to an average of the respective inductances.

Abstract: An energy management system (EMS) for an aircraft is provided. The aircraft may have one of a plurality of propulsion systems such as a parallel hybrid electric propulsion system, a parallel turbo electric propulsion system, an electric propulsion system, a turbo electric propulsion system and a turbo hybrid electric propulsion system. The EMS comprises redundant control paths for controlling safety critical operation. Each redundant control path is configured to independently determine whether to electrically isolate a line replaceable unit (LRU) from a high voltage DC link (HVDC link) based on status information from the LRU. The isolation is based on the independent determination. The HVDC link is used for propulsion. The number of the redundant control paths and components may be depending on the type of the propulsion system.

Abstract: A system for controlling load sharing between multiple generators mechanically coupleable to the output shaft of a prime mover is provided. The system may comprise a first processor; and at least two inverters operably connectable to at least two generators, respectively. The generators provide AC power to the respective inverter and each inverter provides DC power to a respective DC link. Each inverter may comprise a processor configured to control a respective generator. The processor may be configured to receive a common speed command from the first processor, adjust the common speed command based on a speed of the same output shaft to create a droop, determine a torque command based on the adjusted speed command and supply the determined torque command to the corresponding generator.

Abstract: A rotor hub assembly includes a rotor hub, a rotor and a cooling sleeve surrounding the rotor hub and located between the rotor hub and the rotor. Coolant flows between the rotor hub and the rotor during spinning of the rotor hub assembly. The cooling sleeve may include channels formed in the inner surface. The rotor hub may include an annular channel in fluid communication with the cooling sleeve channels. The annular channel may include apertures such that the cavities in the rotor hub are in fluid communication with the cooling sleeve. Coolant circulating within the rotor hub enters the annular channel and the channels in the cooling sleeve from centrifugal force caused by spinning of the rotor hub assembly.

Abstract: A fault detection system for a system having a single DC input and a plurality of A/C loads such as an electric or hybrid electric vehicle. A plurality of inverters convert DC to 3-phase A/C and supply A/C power to a corresponding individual A/C load. Each inverter includes a common mode current transformer and a controller. An individual corresponding common mode current transformer is coupled to the 3-phase A/C output of the inverter. An individual corresponding controller is coupled to the output of an individual corresponding common mode current transformer and is coupled to an individual corresponding A/C load. Each controller is configured to detect a fault at the individual corresponding A/C load and in the case of detection of a fault at an individual corresponding A/C load, the corresponding controller disables the A/C load.

Abstract: A vehicle battery thermal management system and method providing active internal air cooling includes a heat exchanger mounted within an exterior wall of the battery enclosure. The heat exchanger has a first set of heat exchanger elements extending externally to the battery enclosure and in fluid communication with external ambient air. The heat exchanger has a second set of heat exchanger elements extending internally to the battery enclosure and in fluid communication with internal air within the battery enclosure. The system includes at least one of an external damper door and an internal damper door. The external damper door is configured to control the flow of the external ambient air into the first set of heat exchanger elements. The internal damper door is configured to control the flow of the internal air into the first set of heat exchanger elements.

Abstract: Systems and methods for reducing a likelihood that an engine exceeds its torque or power limit at a specific speed are provided. Also provided are systems and methods for reducing a likelihood that DC-DC converters and AC inverters overload a generator at a specific speed.

Abstract: A vehicle battery thermal management system and method providing active internal air cooling includes a heat exchanger mounted within an exterior wall of the battery enclosure. The heat exchanger has a first set of heat exchanger elements extending externally to the battery enclosure and in fluid communication with external ambient air. The heat exchanger has a second set of heat exchanger elements extending internally to the battery enclosure and in fluid communication with internal air within the battery enclosure. The system includes at least one of an external damper door and an internal damper door. The external damper door is configured to control the flow of the external ambient air into the first set of heat exchanger elements. The internal damper door is configured to control the flow of the internal air into the first set of heat exchanger elements.