Abstract: A drive unit for a vehicle includes an electric motor, an output shaft, and a housing. The electric motor includes a rotor shaft having an inner surface with a hollow accessible via an opening at an axial end of the rotor shaft and an outer surface opposite the inner surface. The output shaft extends into the hollow through the opening. The housing houses the electric motor and defines a fluid flow path for fluid. The housing has a collar portion about the output shaft, a first holding portion on a first axial side of the collar portion and having baffles that are circumferentially offset from each other, a second holding portion on a second axial side of the collar portion opposite the first axial side, such that the collar portion is positioned axially between the first and second holding portions, and conduits extending between the first and second holding portions.

Abstract: An electric drive unit includes a motor that rotates a rotor shaft, a transmission assembly coupled with the rotor shaft, a differential assembly with a ring gear that interfaces with a gear of the transmission assembly, such that rotation of the rotor shaft drives rotation of the ring gear, and a housing. The housing includes a body, a cover that with the body forms an enclosure about an interior region of the housing in which the transmission and differential assemblies are disposed, wherein the interior region includes a primary oil reservoir, and a gasket coupled with the cover. The cover and the gasket define a secondary oil reservoir. The gasket defines an opening and at least one passage. Rotation of the ring gear delivers oil into the secondary oil reservoir from the primary oil reservoir via the opening, and the passage conveys oil to a portion of the differential assembly.

Abstract: A tilt apparatus of an aircraft, comprising: a first frame, a second frame moveably coupled to the first frame, a propulsion system coupled to the second frame and configured to move with the second frame, the propulsion system comprising: a propeller, a motor configured to rotate the propeller, and a propulsion inverter configured to supply current to the motor. The tilt apparatus further comprises a tilt actuation system coupled to the second frame and configured to tilt with the second frame with respect to the first frame, the tilt actuation system comprising: a tilt actuator; a tilt actuator inverter configured to supply current to the tilt actuator, and a tilt actuator gearbox coupled to the second frame and configured to tilt with the second frame. The tilt actuator is configured to the tilt the second frame with respect to the first frame via the tilt actuator gearbox.

Abstract: A tilt actuation apparatus for tilting a propulsion system of an aircraft, the tilt actuation apparatus comprising: a tilt actuator comprising a rotor; a gear set, wherein the rotor is coupled to the gear set, a worm gear concentrically coupled to an output of the gear set, a worm wheel meshed with the worm gear, a gear shaft concentrically coupled to the worm wheel, a pinion concentrically coupled to the gear shaft, and an output shaft coupled to an output of the pinion, the output shaft configured to be fixed to a frame of the aircraft.

Abstract: A system for controlling inventory-specific resource allocation comprises, for each particular inventory item of a set of inventory items: (i) determine a plurality of evaluation score deltas, each of the plurality of evaluation score deltas being associated with a respective inventory dimension of a plurality of inventory dimensions associated with the particular inventory item, the plurality of inventory dimensions comprising at least views and age; (ii) determine an evaluation score for the particular inventory item using the plurality of evaluation score deltas; (iii) determine an inventory resource allocation level for the particular inventory item based on the evaluation score; and (iv) automatically update resource allocation settings for the particular inventory item on one or more promotional communications platforms based on the inventory resource allocation level for the particular inventory item.

Abstract: A system for controlling inventory-specific resource allocation comprises, for each particular inventory item of a set of inventory items: (i) determine a plurality of evaluation score deltas, each of the plurality of evaluation score deltas being associated with a respective inventory dimension of a plurality of inventory dimensions associated with the particular inventory item, the plurality of inventory dimensions comprising at least leads and age; (ii) determine an evaluation score for the particular inventory item using the plurality of evaluation score deltas; (iii) determine an inventory resource allocation level for the particular inventory item based on the evaluation score; and (iv) automatically update resource allocation settings for the particular inventory item on one or more promotional communications platforms based on the inventory resource allocation level for the particular inventory item.

Abstract: A process for detecting degradation of a switching device including an electromagnetic actuator configured to unlock a control mechanism including an elastic member.

Abstract: A method for determining a quantity of a gas contained in a tank of a gas insulated switchgear. The method includes during a calibration phase: (i) acquiring a plurality of successive sets of calibration samples comprising a gas pressure, a gas temperature and an ambient temperature, (ii) for each set of calibration samples, determining a corrected gas temperature from a model and (iii) determining a gas quantity contained in the tank from a gas state equation and from the determined corrected gas temperature. The method further includes during a measurement phase: (v) determining a corrected gas temperature from the model and from an acquired gas temperature, gas pressure and ambient temperature, and (vi) determining the quantity from the gas state equation and from the determined corrected gas temperature.

Abstract: Monitoring the condition of an electrical apparatus based on an estimated temperature of a conductor in the electrical apparatus, including receiving a measured temperature value from a first thermal sensor disposed in the electrical apparatus and configured to sense temperature at a location separated from the conductor by an insulator, generating an estimated conductor temperature value based on applying a non-linear model to the measured temperature value, and monitoring the condition of the electrical apparatus based on the estimated conductor temperature. The non-linear model may include a Hammerstein Wiener model.

Abstract: A method for determining an operational status of a switching device for switching an electrical unit including a first circuit and a second circuit, each circuit respectively including: a vacuum breaker including a fixed electrode and a mobile electrode; and a control device connected to the mobile electrode via an elastic device. The method including: for each of the first and second circuits, determining a transition instant at which the mobile electrode comes into contact with the fixed electrode; determining a difference between the transition instant of the first vacuum breaker and the transition instant of the second vacuum breaker; determining that the operational status is a first status known as “nominal synchronization” if the difference is less than a threshold; and determining that the operational status is a second status known as “abnormal synchronization” if the difference is greater than the threshold.

Abstract: An electric pump system and method of operating the same involves pumping a fluid through a fluid passageway defined in a mechanical pump from a pump inlet to a hollow shaft of a motor, through the hollow shaft to an internal motor cavity defined by a housing of the motor, and through another fluid passageway defined in the motor housing and mechanical pump that leads to a pump outlet. The system and method further involve pumping the fluid through another fluid passageway defined in the mechanical pump from yet another pump inlet to the pump outlet. The temperature of fluid exiting the hollow shaft can be assessed and used by an electronic control unit (ECU) of the electric pump system to control the same. The electric pump system can be part of a cooling and lubrication system for an electric vehicle transmission, gearbox, differential or transfer case, for example.

Abstract: A method for detecting an abnormal event in an insulator of an electrical conductor of a medium-voltage or high-voltage electrical device. The method includes: acquiring a set of successive samples of a vibration signal associated with the electrical conductor; determining a modelled value of a following sample based on the acquired set of samples and on a prediction model, the prediction model being obtained through machine learning of the vibration signal based on a set of samples acquired in reference conditions in which the electrical conductor is free from any abnormal event; acquiring the following sample of the vibration signal; calculating a difference between the value of the acquired sample and the modelled value; and if the calculated difference is greater than a predetermined threshold, detecting an abnormal event in the electrical conductor.

Abstract: A method for testing capacitive current switching of a circuit breaker, including: realizing a capacitive current switching by the circuit breaker, measuring voltage at the terminals of the circuit breaker after the capacitive current switching, calculating the gradient of the measured voltage, determining whether there is at least one point of gradient whose amplitude exhibits an absolute value greater than a first predetermined threshold, and when such a point is determined, identifying the instant of appearance of the determined point and of the amplitude of variation of the voltage at that instant, as voltage drop.

Abstract: An electric pump system and method of operating the same involves pumping a fluid through a fluid passageway defined in a mechanical pump from a pump inlet to a hollow shaft of a motor, through the hollow shaft to an internal motor cavity defined by a housing of the motor, and through another fluid passageway defined in the motor housing and mechanical pump that leads to a pump outlet. The system and method further involve pumping the fluid through another fluid passageway defined in the mechanical pump from yet another pump inlet to the pump outlet. The temperature of fluid exiting the hollow shaft can be assessed and used by an electronic control unit (ECU) of the electric pump system to control the same. The electric pump system can be part of a cooling and lubrication system for an electric vehicle transmission, gearbox, differential or transfer case, for example.

Abstract: A method for determining a quantity of a gas contained in a tank of an insulated switchgear. The method includes: (i) acquiring a first temperature and a second temperature measured by a gas temperature sensor respectively at a first instant and at a second instant during a calibration phase; (ii) acquiring a first pressure and a second pressure measured by a gas pressure sensor at the first instant and at the second instant; (iii) determining a steady-state model of the tank thermal exchanges from the first and second acquired temperature and from the first and second acquired pressure; (iv) acquiring a gas temperature, a gas pressure and an ambient temperature during a measurement phase and (v) calculating the quantity of the gas contained in the tank from the acquired gas temperature, the acquired gas pressure, the acquired ambient temperature and from the determined steady state model.

Abstract: An electric motor includes a case, a stator having stator windings, a rotor having a rotor shaft, and at least one main rotor bearing coupling the rotor shaft to the case. Common mode charge builds up on the rotor due to imbalances of the stator. The at least one main rotor bearing has a first electrical resistance between the rotor shaft and the case. The electric motor further includes a rotor discharge bearing coupling the rotor shaft to the case. The rotor discharge bearing has a second electrical resistance between the rotor shaft and the case that is less than the first electrical resistance, causing the common mode charge to discharge through the rotor discharge bearing. In a differing embodiment, a rotor discharge brush coupled between the case and the rotor shaft along the longitudinal axis of the rotor shaft discharges the common mode charge.

Abstract: A method operates a power converter having at least one series circuit of switching modules, which each have semiconductor switches and an energy store. In which method a switching frequency of the switching modules is controlled by tolerance based modulation, and the forming of a switching integral value for the tolerance based modulation takes into account an absolute amount of an arm current flowing through the series circuit. A power converter has a control device that is configured to perform the method.

Abstract: Method for monitoring for partial discharges in an electrical installation comprising at least one electrical cubicle, the electrical cubicle comprising at least one item of medium-voltage or high-voltage electrical equipment.

Abstract: A method for detecting an abnormal event in an insulator of an electrical conductor of a medium-voltage or high-voltage electrical device. The method includes: acquiring a set of successive samples of a vibration signal associated with the electrical conductor; determining a modelled value of a following sample based on the acquired set of samples and on a prediction model, the prediction model being obtained through machine learning of the vibration signal based on a set of samples acquired in reference conditions in which the electrical conductor is free from any abnormal event; acquiring the following sample of the vibration signal; calculating a difference between the value of the acquired sample and the modelled value; and if the calculated difference is greater than a predetermined threshold, detecting an abnormal event in the electrical conductor.

Abstract: A method for classifying a partial discharge in an insulator of an electrical conductor of a medium voltage or high voltage electrical device, the method allowing a partial discharge to be classified from between at least one first class and a second class distinct from the first class. The method includes: obtaining a set of samples each corresponding to at least one partial discharge, determining a classification model by automatic learning based on at least one statistical quantity of the samples of the set, acquiring a new sample corresponding to at least one partial discharge, and determining the class of the partial discharge associated with the new sample acquired using the classification model.