Abstract: A gate drive circuit of a wide band gap power device (IGBT) includes a buffer, a di/dt sensing network, a turn-on circuit portion and turn-off circuit portion. The buffer, responsive to turn-on, supplies a first current via the first current path to the gate of the IGBT, and responsive to turn-off ceases the supply of the first current. The di/dt sensing network receives a feedback control signal representative of a voltage measurement across a parasitic inductance that exists between a Kelvin emitter and a power emitter of the The turn-on circuit portion, responsive to turn-on and a parasitic inductance of zero volts, supplies a second current via a second current path to the gate of the IGBT. The turn-off circuit portion, responsive to turn-off and a parasitic inductance of zero volts, discharges a gate capacitance of the IGBT through both the first current path and a third current path.

Abstract: A power converter system includes a printed circuit board having a first connector for receiving low voltage control signals and a second connector for receiving input voltages from one or more power generators and transmitting output voltages to a power distribution unit. Power devices are mounted onto the printed circuit board to manage the input voltages and to generate the output voltages. An enclosure is mounted around the printed circuit board and power devices. The power devices engage interior surfaces of the enclosure forming a conductive heat path between the power devices, the interior surfaces, and exterior surfaces of the enclosure. The heat path conductively transfers heat from the power devices to the exterior surfaces.

Abstract: A current sensing system includes a pre-calibrated busbar, a voltage sensor, a temperature sensor and a controller. The pre-calibrated busbar has a known resistance, a known variation in resistance with respect to temperature and known dimensions. The voltage sensor detects a difference in voltage between a first location and a second location on the pre-calibrated busbar. The temperature sensor detects an ambient temperature of the pre-calibrated busbar. The controller determines a resistance of the busbar between the first location and the second location based on the known resistance, known variation in resistance, known dimensions and the ambient temperature. The controller additionally determines a current flowing through the pre-calibrated busbar based on the difference in voltage and the determined resistance. The current sensing system has numerous applications including using the determined current to control an operating condition of a solid state circuit breaker or a solid state power controller.

Abstract: An axial flux electric can include a motor assembly including a motor shaft, a stator assembly, and a rotor assembly. The stator assembly can include a plurality of stator cores about which a wire coil is wound, wherein one or more of the stator cores includes a stator body with an internal fluid passageway for receiving a cooling fluid.

Abstract: The present disclosure relates to an axial flux motor comprising a stator assembly and a rotor assembly. The axial flux motor includes stator cores having enlarged end plates. The axial flux motor also includes a cooling jacket including fins that extend between electromagnets of the stator assembly. The axial flux motor rotor assembly also includes an air cooling arrangement to provide air cooling to the stator assembly.

Abstract: The present disclosure relates to an axial flux motor comprising a stator assembly and a rotor assembly. The axial flux motor rotor assembly also includes an air cooling arrangement to provide air cooling to the stator assembly. The axial flux motor includes stator cores having enlarged end plates. The axial flux motor also includes a cooling jacket including fins that extend between electromagnets of the stator assembly.

Abstract: A switched reluctance machine has a stator core salient with stator poles disposed concentrically with a rotor that is salient with rotor poles. A plurality of coil windings are wound about the stator core so that a pair of windings are adjacent each of the stator poles. The pair of coil windings induces magnetic flux in the adjacent stator poles and the rotor rotates to align the rotor poles with the stator poles having the induced magnetic flux. The rotor is rotatable at high speeds of up to 50,000 RPM and the coil windings can be directly cooled.

Abstract: A method of determining the state of a pedal actuator system within a vehicle includes receiving a position sensor signal indicative of a position of an actuator pedal within the pedal actuator system, receiving a force sensor signal indicative of a compressive force applied to the actuator pedal, and determining, with a processor, a state of the actuator pedal based on the position sensor signal and the force sensor signal. The state of the actuator pedal is one of a normal operating state and a fault state.

Abstract: A variable valve, method, and diagnostic system are provided that determine accuracy of a position of a variable valve. The variable valve, method, and diagnostic system are configured to determine a system error, the system error being the difference between a commanded position of the valve and a measured position of the valve provided through a feedback signal of the valve. The variable valve, method, and diagnostic system are further configured to determine that a diagnostic accuracy passing condition is met if: a) the system error is less than a predetermined positive error threshold and greater than a predetermined negative error threshold; b) a rate of change of the measured position exceeds a predetermined positive feedback rate threshold; or c) the rate of change of the measured position is less than a predetermined negative feedback rate threshold.

Abstract: A system is disclosed for detecting when an electronic locking (e-Locker) differential of a vehicle is in a stuck condition. The system may have an e-Locker differential for driving a plurality of wheels, and may be configured to move between first and second positions, one of which places the e-Locker differential in a locked state, and the other of which places it in an unlocked state. An e-Locker coil, when energized may cause movement of the differential e-Locker actuator between the first and second positions. A position sensing subsystem may use an inductance of the e-Locker coil to determine if the differential e-Locker actuator is stuck in one of the first and second positions.

Abstract: A method of determining the state of a pedal actuator system within a vehicle includes receiving a position sensor signal indicative of a position of an actuator pedal within the pedal actuator system, receiving a force sensor signal indicative of a compressive force applied to the actuator pedal, and determining, with a processor, a state of the actuator pedal based on the position sensor signal and the force sensor signal.

Abstract: A vehicle includes a body and an active air dam assembly. The body has a first end facing an ambient airflow and a second end facing away from the ambient airflow. The assembly is disposed at the first or second end and controls the ambient airflow between the body and a road surface. The assembly includes an adjustable flap, an actuator, sensors, and a controller. The flap shifts between different stowed and deployed positions. The actuator moves the flap, e.g., via a shaft. Each sensor measures a separate performance parameter of the actuator. The controller executes a method to receive the measured performance parameters, identify a fault mode of the air dam assembly from among different possible fault modes using the performance parameters, and execute a control action corresponding to the identified fault mode.

Abstract: A system is disclosed for detecting when an electronic locking (e-Locker) differential of a vehicle is in a stuck condition. The system may have an e-Locker differential for driving a plurality of wheels, and may be configured to move between first and second positions, one of which places the e-Locker differential in a locked state, and the other of which places it in an unlocked state. An e-Locker coil, when energized may cause movement of the differential e-Locker actuator between the first and second positions. A position sensing subsystem may use an inductance of the e-Locker coil to determine if the differential e-Locker actuator is stuck in one of the first and second positions.

Abstract: A variable valve, method, and diagnostic system are provided that determine accuracy of a position of a variable valve. The variable valve, method, and diagnostic system are configured to determine a system error, the system error being the difference between a commanded position of the valve and a measured position of the valve provided through a feedback signal of the valve. The variable valve, method, and diagnostic system are further configured to determine that a diagnostic accuracy passing condition is met if: a) the system error is less than a predetermined positive error threshold and greater than a predetermined negative error threshold; b) a rate of change of the measured position exceeds a predetermined positive feedback rate threshold; or c) the rate of change of the measured position is less than a predetermined negative feedback rate threshold.

Abstract: A vehicle includes a body and an active air dam assembly. The body has a first end facing an ambient airflow and a second end facing away from the ambient airflow. The assembly is disposed at the first or second end and controls the ambient airflow between the body and a road surface. The assembly includes an adjustable flap, an actuator, sensors, and a controller. The flap shifts between different stowed and deployed positions. The actuator moves the flap, e.g., via a shaft. Each sensor measures a separate performance parameter of the actuator. The controller executes a method to receive the measured performance parameters, identify a fault mode of the air dam assembly from among different possible fault modes using the performance parameters, and execute a control action corresponding to the identified fault mode.

Abstract: A switched reluctance machine has a stator core salient with stator poles disposed concentrically with a rotor that is salient with rotor poles. A plurality of coil windings are wound about the stator core so that a pair of windings are adjacent each of the stator poles. The pair of coil windings induces magnetic flux in the adjacent stator poles and the rotor rotates to align the rotor poles with the stator poles having the induced magnetic flux. The rotor is rotatable at high speeds of up to 50,000 RPM and the coil windings can be directly cooled.

Abstract: A powertrain system for a vehicle is provided. The powertrain system includes an internal combustion engine, a first gearset connected to the internal combustion engine, a first electric machine connected to the first gearset, a drivetrain gear for connection to a drivetrain of the vehicle, a second gearset connecting the first gearset to the drivetrain gear, a second electric machine, and at least one dynamic clutch selectively coupling the second electric machine to the first electric machine, the first gearset, and the second gearset. In a first mode of operation, the at least one dynamic clutch couples the second electric machine and the first electric machine. In a second mode of operation, the at least one dynamic clutch couples the second electric machine and the first gearset. In a third mode of operation, the at least one dynamic clutch couples the second electric machine and the second gearset.

Abstract: A hybrid powertrain for an aircraft may include a drive shaft, the drive shaft, an internal combustion engine to selectably drive the drive shaft, a propeller coupled to the drive shaft and an electric motor having a stator and a rotor and operable to selectably drive the drive shaft. The drive shaft may extend through the electric motor. The rotor may be coupled to the drive shaft to rotate with the drive shaft and the rotor is a flywheel for the internal combustion engine.

Abstract: A powertrain system for a vehicle is provided, including an internal combustion engine, a drivetrain gear for connection to a drivetrain of the vehicle, a gearset connecting the internal combustion engine to the drivetrain gear, a first electric machine connected to the gearset, a second electric machine, and at least one dynamic clutch selectively coupling the second electric machine to the drivetrain gear and the gearset. In a compound mode of operation, the at least one dynamic clutch couples the second electric machine and the gearset. In a split mode of operation, the at least one dynamic clutch couples the second electric machine and the drivetrain gear.

Abstract: A vehicle powertrain system including a differential gear set, a planetary gear set coupled to the differential gear set, an engine coupled to the planetary gear set to transfer power between the engine and the planetary gear set, a first electric machine coupled to the planetary gear set via a first clutch and selectively engagable, via actuation of the first clutch, to transfer power between the first electric machine and the planetary gear set, and a second electric machine coupled to the planetary gear set via a second clutch and selectively engagable, via actuation of the second clutch, to transfer power between the second electric machine and the planetary gear set.