Abstract: Methods, systems and computer products as described herein are directed to a Live Listing Engine. Live Listing Engine sends a live video stream to a viewer computer device and a host computer device. The live video stream includes a view of an item from a perspective of the host computer device. The Live Listing Engine receives an upload of an image of the view of the item captured from a preview window rendered on the host computer device. The Live Listing Engine receives listing information associated with the image from the host computer device. The Live Listing Engine generates a listing thumbnail based on the image and the listing information and inserts the listing thumbnail into the live video stream for display at the viewer computer device and the host computer device.

Abstract: Methods, systems and computer products disclosed herein are directed to an O.C. Engine that detects a first request sent from a requesting account during a target account session, the target account associated with multiple sessions. The O.C. Engine generates a first request parent node active for a range of time. The O.C. Engine detects a subsequent second request sent from the requesting account and generates a second request node. The O.C. Engine verifies that the subsequent second request is not an initial request by the requesting account during a range of time that has not yet expired. Upon verification, the O.C. Engine identifies the second request node as a child node by generating a link between the parent node and the child node.

Abstract: In an example embodiment, a system includes an inverter configured to operate in at least one of a charging mode or a drive mode, a cascaded direct current (DC)-DC converter, the DC-DC converter including a first portion of the inverter and at least one controller configured to selectively couple the first portion of the inverter to a first portion of the cascaded DC-DC converter during the charging mode, and selectively couple the inverter to a second portion of the cascaded DC-DC converter during the drive mode.

Abstract: In an example embodiment, a system includes a plurality of inverters configured to operate in at least one of a charging mode or a drive mode, a plurality of motors and at least one controller configured to selectively couple the plurality of inverters to the plurality of motors during a drive mode, and selectively couple at least one of the inverters to an alternating current (AC) source during the charging mode and decouple the at least one of the inverters from the plurality of motors during the charging mode.

Abstract: Methods, systems and computer products disclosed herein are directed to an O.C. Engine that detects a first request sent from a requesting account during a target account session, the target account associated with multiple sessions. The O.C. Engine generates a first request parent node active for a range of time. The O.C. Engine detects a subsequent second request sent from the requesting account and generates a second request node. The O.C. Engine verifies that the subsequent second request is not an initial request by the requesting account during a range of time that has not yet expired. Upon verification, the O.C. Engine identifies the second request node as a child node by generating a link between the parent node and the child node.

Abstract: Methods, systems and computer products disclosed herein are directed to an O.C. Engine that detects a first request sent from a requesting account during a target account session, the target account associated with multiple sessions. The O.C. Engine generates a first request parent node active for a range of time. The O.C. Engine detects a subsequent second request sent from the requesting account and generates a second request node. The O.C. Engine verifies that the subsequent second request is not an initial request by the requesting account during a range of time that has not yet expired. Upon verification, the O.C. Engine identifies the second request node as a child node by generating a link between the parent node and the child node.

Abstract: Methods, systems and computer products as described herein are directed to a Live Listing Engine. Live Listing Engine sends a live video stream to a viewer computer device and a host computer device. The live video stream includes a view of an item from a perspective of the host computer device. The Live Listing Engine receives an upload of an image of the view of the item captured from a preview window rendered on the host computer device. The Live Listing Engine receives listing information associated with the image from the host computer device. The Live Listing Engine generates a listing thumbnail based on the image and the listing information and inserts the listing thumbnail into the live video stream for display at the viewer computer device and the host computer device.

Abstract: Methods, systems and computer products as described herein are directed to a Live Listing Engine. Live Listing Engine sends a live video stream to a viewer computer device and a host computer device. The live video stream includes a view of an item from a perspective of the host computer device. The Live Listing Engine receives an upload of an image of the view of the item captured from a preview window rendered on the host computer device. The Live Listing Engine receives listing information associated with the image from the host computer device. The Live Listing Engine generates a listing thumbnail based on the image and the listing information and inserts the listing thumbnail into the live video stream for display at the viewer computer device and the host computer device.

Abstract: A control module comprises software instructions for execution by an electronic data processor. An inductance estimator is configured to estimate direct inductance and quadrature inductance associated with the electric machine based on a first set of equations that assume constant rotor resistance and constant magnetic flux. A torque estimator is configured to estimate an observed torque associated with a rotor of the electric machine based a commanded direct-axis voltage and a commanded quadrature-axis voltage, where the observed torque is proportional to the observed power consumption of the electric machine. A pulse-width-modulation (PWM) module is configured to provide pulse-width modulated signals to the electric machine based on the commanded direct-axis voltage and a commanded quadrature-axis voltage. A back-electromotive force adjustment is derived from an estimated, observed torque and a commanded torque.

Abstract: In an example embodiment, a system includes an inverter configured to operate in at least one of a charging mode or a drive mode, a cascaded direct current (DC)-DC converter, the DC-DC converter including a first portion of the inverter and at least one controller configured to selectively couple the first portion of the inverter to a first portion of the cascaded DC-DC converter during the charging mode, and selectively couple the inverter to a second portion of the cascaded DC-DC converter during the drive mode.

Abstract: A control module comprises software instructions for execution by an electronic data processor. An inductance estimator is configured to estimate direct inductance and quadrature inductance associated with the electric machine based on a first set of equations that assume constant rotor resistance and constant magnetic flux. A torque estimator is configured to estimate an observed torque associated with a rotor of the electric machine based a commanded direct-axis voltage and a commanded quadrature-axis voltage, where the observed torque is proportional to the observed power consumption of the electric machine. A pulse-width-modulation (PWM) module is configured to provide pulse-width modulated signals to the electric machine based on the commanded direct-axis voltage and a commanded quadrature-axis voltage. A back-electromotive force adjustment is derived from an estimated, observed torque and a commanded torque.

Abstract: Methods, systems and computer products disclosed herein are directed to an O.C. Engine that detects a first request sent from a requesting account during a target account session, the target account associated with multiple sessions. The O.C. Engine generates a first request parent node active for a range of time. The O.C. Engine detects a subsequent second request sent from the requesting account and generates a second request node. The O.C. Engine verifies that the subsequent second request is not an initial request by the requesting account during a range of time that has not yet expired. Upon verification, the O.C. Engine identifies the second request node as a child node by generating a link between the parent node and the child node.

Abstract: Methods, systems and computer products as described herein are directed to a Live Listing Engine. Live Listing Engine sends a live video stream to a viewer computer device and a host computer device. The live video stream includes a view of an item from a perspective of the host computer device. The Live Listing Engine receives an upload of an image of the view of the item captured from a preview window rendered on the host computer device. The Live Listing Engine receives listing information associated with the image from the host computer device. The Live Listing Engine generates a listing thumbnail based on the image and the listing information and inserts the listing thumbnail into the live video stream for display at the viewer computer device and the host computer device.

Abstract: Methods, systems and computer products as described herein are directed to a Live Listing Engine. Live Listing Engine sends a live video stream to a viewer computer device and a host computer device. The live video stream includes a view of an item from a perspective of the host computer device. The Live Listing Engine receives an upload of an image of the view of the item captured from a preview window rendered on the host computer device. The Live Listing Engine receives listing information associated with the image from the host computer device. The Live Listing Engine generates a listing thumbnail based on the image and the listing information and inserts the listing thumbnail into the live video stream for display at the viewer computer device and the host computer device.

Abstract: In an example embodiment, a method of controlling a three-phase alternating current (AC) voltage source includes determining an error between a direct current (DC) bus voltage command and a detected DC bus voltage, the detected DC bus voltage being a part of an outer feedback loop, obtaining one of a virtual conductance or virtual resistance, the one of the virtual conductance or the virtual resistance being a part of an inner feedback loop relative to the outer feedback loop, regulate an output DC bus voltage based on the error and the one of the virtual conductance or the virtual resistance and controlling the three-phase AC voltage source based on the regulation of the output DC bus voltage.

Abstract: In an example embodiment, a method of controlling a three-phase alternating current (AC) voltage source includes determining an error between a direct current (DC) bus voltage command and a detected DC bus voltage, the detected DC bus voltage being a part of an outer feedback loop, obtaining one of a virtual conductance or virtual resistance, the one of the virtual conductance or the virtual resistance being a part of an inner feedback loop relative to the outer feedback loop, regulate an output DC bus voltage based on the error and the one of the virtual conductance or the virtual resistance and controlling the three-phase AC voltage source based on the regulation of the output DC bus voltage.

Abstract: In an example embodiment, a controller includes a memory having computer-readable instructions stored therein and a processor. The processor is configured to execute the computer-readable instructions to determine a first set of inductance values for at least one load machine and second set of inductance values for a generator machine, determine a first set of gains for the at least one load machine based on the first set of inductance values and a regulator bandwidth, determine a second set of gains for the generator machine based on the second set of inductance values and the regulator bandwidth, and generate voltage commands for driving the at least one load machine and the generator machine based on at least the first and second sets of gains.

Abstract: In an example embodiment, a controller includes a memory having computer-readable instructions stored therein and a processor. The processor is configured to execute the computer-readable instructions to determine a first set of inductance values for at least one load machine and second set of inductance values for a generator machine, determine a first set of gains for the at least one load machine based on the first set of inductance values and a regulator bandwidth, determine a second set of gains for the generator machine based on the second set of inductance values and the regulator bandwidth, and generate voltage commands for driving the at least one load machine and the generator machine based on at least the first and second sets of gains.