Abstract:
The methods and systems for correcting for an inductive load when testing high voltages devices are described. A high voltages device is a device under test (DUT) in a double-pulse test, which may require the inductive load. The method can include in a low current, high voltage time period, estimating an inductor current contribution range after a turn on of the device-under-test connected to an inductive load with an air core inductor. The method subtracts the estimated inductor current contribution from a device-under-test collector current to output a corrected collector current. This allows the double pulse test to be conducted with an air-core inductor. Vehicles can use the DUT in traction power applications.
Abstract:
A vehicle is provided with a coil and a sensor. The coil is adapted to receive power wirelessly in single-phase form from an external coil. The sensor is adapted to measure a characteristic of the power. The vehicle is also provided with a controller that is programmed to estimate a parameter indicative of coil alignment using a three-phase representation of the power based on the characteristic, and to adjust the power received by the coil based on the parameter.
Abstract:
A capacitor comprising first and second end sprays respectively located at distal ends of a capacitor cell, a positive polarity bus bar extending from a first wound conductive layer of the capacitor cell adjacent to the first end spray, a negative polarity bus bar extending from a second wound conductive layer of the capacitor cell adjacent to the second end spray, and a capacitor film wrapped around an area between the first and second conductive layers.
Abstract:
A power system includes a battery and a controller. The controller inhibits charge of the battery according to voltage or current values sensed before and after contactors electrically connected to the battery are commanded to open and indicating that a leakage resistance associated with one of the contactors increases after the one of contactors is commanded to open, and a duration of a continuous voltage drop across another of the contactors after the another of the contactors is commanded to open exceeds a threshold.
Abstract:
A method according to an exemplary aspect of the present disclosure includes, among other things, controlling a vehicle using switching loss information of a semiconductor switching device, the switching loss information derived from a conduction loss and a combined conduction and switching loss.
Abstract:
A power supply is provided. The power supply device includes a power module and a capacitor. The power module includes inverting circuitry and is configured to deliver electrical power to an electric machine. The capacitor is disposed adjacent to the power module and is arranged to limit voltage variation at the inverting circuitry input due to ripple current. The inverting circuitry and the capacitor are surrounded by a monolithic non-metal casing that provides voltage isolation between the power module and the capacitor.
Abstract:
A method according to an exemplary aspect of the present disclosure includes, among other things, controlling a vehicle using switching loss information of a semiconductor switching device, the switching loss information derived from a conduction loss and a combined conduction and switching loss.
Abstract:
A charger system and method is disclosed for providing wireless and wired charging. The charger may include a wire-charging circuit operable to receive and process a first electrical energy from a wired power source directly connected to the vehicle. The charger may also include a receiving coil operable to receive a second electrical energy received from a wireless power source external that is not directly connected to the vehicle. The charger may include a resonant circuit having a receiving coil and a DC-DC converter. The receiving coil may provide impedance matching when the charger is receiving the first electrical energy from the wired power source. The receiving coil may also be energized by a wireless power source to receive a second electrical energy. The charger may further include a rectifier circuit operable to charge the battery using the first electrical energy or the second electrical energy.
Abstract:
A method includes measuring an impedance of a shunt as a function of frequency and converting the impedance to an admittance in a time domain. The method further includes connecting the shunt in a circuit and measuring voltage data across the shunt over a predetermined interval. The method includes outputting a signal indicative of a current through the shunt derived from the voltage data convolved with the admittance. The method may be implemented in a controller configured to interface with the shunt.
Abstract:
A DC to DC power converter includes a switching circuit and an LC filter configured to reduce parasitic inductance. The LC filter includes an inductor, capacitor, and a coil positioned and oriented relative to and electrically connected with the capacitor. The coil positioned with the capacitor provides the ripple current caused by operation of the switching circuitry to flow through the capacitor and coil with opposite direction. The ripple current flowing through the coil attenuates a magnetic field generated by the capacitor while reducing parasitic inductance of the capacitor.