Abstract: Various disclosed embodiments include illustrative electrical power dispensers for electrical vehicle charging systems, charging systems, and methods of sensing presence of a charge coupler in a holster of an electrical power dispenser. In an illustrative embodiment, an electrical power dispenser for an electrical vehicle charging system includes a housing. A charge coupler is configured to dispense direct current electrical power. A holster is disposed on the housing and is configured to receive the charge coupler therein. A holster sensor is configured to sense presence of the charge coupler in the holster and is further configured to generate a signal indicative of presence of the charge coupler in the holster.

Abstract: The present disclosure relates to a vehicle power system. In some examples, the vehicle power system can include a plurality of redundant low-power buses coupled to respective low-power batteries. The low-power buses can be powered by a vehicle battery having a higher voltage than the voltage of the low-power batteries by way of a DCDC converter, for example. In some examples, the DCDC converter can be coupled to the low-power buses via a plurality of switches included in an Auxiliary Voltage Controller (AVC). The DCDC converter and the AVC can be housed in a common package to reduce the size, weight, and complexity of the power system while also improving the power system's durability.

Abstract: Power inverter assemblies are provided herein for use with motor vehicles. An inverter assembly may have a symmetrical structure configured to convert DC input power to AC output power. The inverter assembly may include a housing enclosing a symmetrical DC input portion, a symmetrical AC output portion, a DC link capacitor, and a gate drive portion having a pair of power modules. The symmetrical DC input portion can include a DC input bus bar sub-assembly to which the DC link capacitor is coupled, and a second DC bus bar sub-assembly that may electrically couple the DC link capacitor with the power modules. The symmetrical AC output portion may include a three phase output AC bus bar sub-assembly to which the power modules can be electrically coupled. A cooling sub-assembly may be provided for cooling the power modules with fluid transfer using a coolant.

Abstract: Methods and systems for recording streaming audio and video by directing an incoming audio-visual stream to a discrete memory region serving as a virtual display. The virtual display is configured with a section visible to the viewer and a section invisible to the viewer, wherein a streaming video is hidden from the user's display under all conditions. The user's browser is pre-loaded with hooks to redirect the video portion of the stream to the invisible section of the virtual memory wherein a video capture tool specifically designed to interact with the hooks can now recognize each function call and intercept each frame as it is rendered in the GPU. Concurrently, the audio portion of the stream is remapped using an audio indexing application. The GPU framebuffers and audio sinks are multiplexed together and saved to disk. The file is immediately accessible for playback or copying.

Abstract: Methods and systems for recording streaming audio and video by directing an incoming audio-visual stream to a discrete memory region serving as a virtual display. The virtual display is configured with a section visible to the viewer and a section invisible to the viewer, wherein a streaming video is hidden from the user's display under all conditions. The user's browser is pre-loaded with hooks to redirect the video portion of the stream to the invisible section of the virtual memory wherein a video capture tool specifically designed to interact with the hooks can now recognize each function call and intercept each frame as it is rendered in the GPU. Concurrently, the audio portion of the stream is remapped using an audio indexing application. The GPU framebuffers and audio sinks are multiplexed together and saved to disk. The file is immediately accessible for playback or copying.

Abstract: Methods and systems for recording streaming audio and video by directing an incoming audio-visual stream to a discrete memory region serving as a virtual display. The virtual display is configured with a section visible to the viewer and a section invisible to the viewer, wherein a streaming video is hidden from the user's display under all conditions. The user's browser is pre-loaded with hooks to redirect the video portion of the stream to the invisible section of the virtual memory wherein a video capture tool specifically designed to interact with the hooks can now recognize each function call and intercept each frame as it is rendered in the GPU. Concurrently, the audio portion of the stream is remapped using an audio indexing application. The GPU framebuffers and audio sinks are multiplexed together and saved to disk. The file is immediately accessible for playback or copying.

Abstract: The system determines that a multiphase electric motor is in a low-speed operating range, near stall. The system determines a duty cycle for each phase of the multiphase electric motor. The duty cycle includes a nominal component and a zero-sequence component configured to balance temperature rises of power electronics devices of the motor drive. Power electronics devices can include diodes, IGBTs, or other switches or devices. The system causes each duty cycle to be applied to a corresponding switch of the corresponding phase of the multiphase electric motor to cause current flow in the corresponding phase. The system may determine duty cycles corresponding to a thermal balance between a switch and a diode of a phase and a thermal balance between a pair of like devices of different phases, and then determine which duty cycle is closer to a predetermined value.

Abstract: Methods and systems for recording streaming audio and video by directing an incoming audio-visual stream to a discrete memory region serving as a virtual display. The virtual display is configured with a section visible to the viewer and a section invisible to the viewer, wherein a streaming video is hidden from the user's display under all conditions. The user's browser is pre-loaded with hooks to redirect the video portion of the stream to the invisible section of the virtual memory wherein a video capture tool specifically designed to interact with the hooks can now recognize each function call and intercept each frame as it is rendered in the GPU. Concurrently, the audio portion of the stream is remapped using an audio indexing application. The GPU framebuffers and audio sinks are multiplexed together and saved to disk. The file is immediately accessible for playback or copying.

Abstract: Methods and systems for recording streaming audio and video by directing an incoming audio visual stream to a discrete memory region serving as a virtual display. The virtual display is configured with a section visible to the viewer and a section invisible to the viewer, wherein a streaming video is hidden from the user's display under all conditions. The user's browser is pre-loaded with hooks to redirect the video portion of the stream to the invisible section of the virtual memory wherein a video capture tool specifically designed to interact with the hooks can now recognize each function call, and intercept each frame as it is rendered in the GPU. Concurrently, the audio portion of the stream is remapped using an audio indexing application. The GPU framebuffers and audio sinks are multiplexed together and saved to disk. The file is immediately accessible for playback or copying.

Abstract: The present disclosure relates to a vehicle power system. In some examples, the vehicle power system can include a plurality of redundant low-power buses coupled to respective low-power batteries. The low-power buses can be powered by a vehicle battery having a higher voltage than the voltage of the low-power batteries by way of a DCDC converter, for example. In some examples, the DCDC converter can be coupled to the low-power buses via a plurality of switches included in an Auxiliary Voltage Controller (AVC). The DCDC converter and the AVC can be housed in a common package to reduce the size, weight, and complexity of the power system while also improving the power system's durability.

Abstract: Power inverter assemblies are provided herein for use with motor vehicles. An inverter assembly may have a symmetrical structure configured to convert DC input power to AC output power. The inverter assembly may include a housing enclosing a symmetrical DC input portion, a symmetrical AC output portion, a DC link capacitor, and a gate drive portion having a pair of power modules. The symmetrical DC input portion can include a DC input bus bar sub-assembly to which the DC link capacitor is coupled, and a second DC bus bar sub-assembly that may electrically couple the DC link capacitor with the power modules. The symmetrical AC output portion may include a three phase output AC bus bar sub-assembly to which the power modules can be electrically coupled. A cooling sub-assembly may be provided for cooling the power modules with fluid transfer using a coolant.

Abstract: Power inverter assemblies are provided herein for use with motor vehicles. An inverter assembly may have a symmetrical structure configured to convert DC input power to AC output power. The inverter assembly may include a housing enclosing a symmetrical DC input portion, a symmetrical AC output portion, a DC link capacitor, and a gate drive portion having a pair of power modules. The symmetrical DC input portion can include a DC input bus bar sub-assembly to which the DC link capacitor is coupled, and a second DC bus bar sub-assembly that may electrically couple the DC link capacitor with the power modules. The symmetrical AC output portion may include a three phase output AC bus bar sub-assembly to which the power modules can be electrically coupled. A cooling sub-assembly may be provided for cooling the power modules with fluid transfer using a coolant.

Abstract: A method for measuring the isolation resistance between a chassis and a battery terminal in an electric vehicle. The method can include measuring an open voltage (VP(open)) of the positive terminal; measuring an open voltage (VN(open)) of the negative terminal; measuring a voltage (VN(S1 closed)) between the negative terminal and the chassis with switch S1 closed; measuring a voltage (VP(S1 closed)) between the positive terminal and the chassis with switch S1 closed; calculating the ratio (VP(open)/VN(closed)) of the voltages VP(open) and VN(closed); calculating the open ratio of the open voltages (VP(open)/VN(open)); calculating the difference between the ratio (VP(S1 closed)/VN(S1 closed)) and the open ratio (VP(open)/VN(open)); and multiplying the value of the test resistor (R0) by the difference between the ratio (VP(S1 closed)/(VN(S1 closed)) and the open ratio (VP(S2 open)/VN(S1 open)) to obtain the isolation resistance.

Abstract: Methods and systems for recording streaming audio and video by directing an incoming audio visual stream to a discrete memory region serving as a virtual display. The virtual display is configured with a section visible to the viewer and a section invisible to the viewer, wherein a streaming video is hidden from the user's display under all conditions. The user's browser is pre-loaded with hooks to redirect the video portion of the stream to the invisible section of the virtual memory wherein a video capture tool specifically designed to interact with the hooks can now recognize each function call, and intercept each frame as it is rendered in the GPU. Concurrently, the audio portion of the stream is remapped using an audio indexing application. The GPU framebuffers and audio sinks are multiplexed together and saved to disk. The file is immediately accessible for playback or copying.

Abstract: Circuits and methods for driving a load are disclosed. An exemplary driving circuit may include first and second switching devices electrically connected with each other in parallel. The driving circuit may also include a current sensing circuit configured to generate a current sensing signal indicating a value of a current flowing through the first switching device. The current sensing signal may include an offset caused by parasitic inductance imbalance in electrical connections connecting the first and second switching devices. The driving circuit may further include a driver circuit configured to control switching operations of the first and second switching devices. The driver circuit may include an overcurrent protection circuit electrically connected to the current sensing circuit.

Abstract: A three-phase current sensor for measuring currents running in three conductors of a three-phase conductor system includes at least a first magnetic measuring device. The magnetic measuring device includes a magnetic circuit provided with at least two gaps and a magnetic field sensor arranged in each gap of the magnetic circuit. The magnetic field sensors are positioned on both sides of a cavity sized to receive one of the three conductors. The gaps and thus the magnetic field sensors are positioned such that stray magnetic flux from an adjacent conductor has substantially equal amplitude passing through each of the sensors.

Abstract: A three-phase current sensor for measuring currents running in three conductors of a three-phase conductor system includes at least a first magnetic measuring device. The magnetic measuring device includes a magnetic circuit provided with at least two gaps and a magnetic field sensor arranged in each gap of the magnetic circuit. The magnetic field sensors are positioned on both sides of a cavity sized to receive one of the three conductors. The gaps and thus the magnetic field sensors are positioned such that stray magnetic flux from an adjacent conductor has substantially equal amplitude passing through each of the sensors.

Abstract: In one aspect, an apparatus includes a motor and inverter configured to provide input power to the motor and a data store comprising at least one entry including a first torque command, a first motor speed, and a first DC voltage value. The first torque command and the first motor speed and the first DC voltage value are associated with a first current output. The apparatus includes a processor configured to receive a torque input, a DC voltage input, and a motor speed input and determine an output current associated with the torque input, the DC voltage input, and the motor speed input, correct the output current to be within a voltage constraint of the motor when the DC voltage input is than a reference voltage at the motor and output the corrected output current to cause the inverter to provide the input power to the motor.