Abstract:
Die Erfindung betrifft eine Vorrichtung zum Bestimmen einer Temperatur eines Rotors einer elektrischen Maschine. Die Vorrichtung umfasst eine Schnittstelle und eine Recheneinrichtung. Über die Schnittstelle werden Eingangsgrößen empfangen, welche vom Betrieb der elektrischen Maschine abhängig sind. Die Recheneinrichtung berechnet anhand mindestens einer der Eingangsgrößen mittels eines physikalischen Modells einen ersten Beitrag zum Wärmeübergang am Rotor. Weiter berechnet die Recheneinrichtung anhand mindestens einer der Eingangsgrößen mittels eines Künstliche-Intelligenz-Modells einen zweiten Beitrag zum Wärmeübergang am Rotor. Anhand des ersten Beitrags und anhand des zweiten Beitrags zum Wärmeübergang am Rotor berechnet die Recheneinrichtung die Temperatur des Rotors.
Abstract:
The invention relates to an apparatus for angle estimation in a synchronous machine (11), comprising: an angle sensor device (15), which is designed to determine event-discrete measurement values for a rotor angle (phi) of a rotor of the synchronous machine (11) and to output a measurement signal which is dependent on the measurement values determined; an estimation device (16), which is designed to detect current and/or voltage signals from the synchronous machine (11) and to calculate a discrepancy (Deltaphi) of the rotor angle (phi) of the rotor of the synchronous machine (11) with respect to an expected rotor angle depending on the detected current and/or voltage signals and to output a discrepancy signal which is dependent on the calculated discrepancy (Deltaphi); and a combination device (17), which is designed to receive the measurement signal and the discrepancy signal and to calculate an estimated value () for the rotor angle (phi) of the rotor of the synchronous machine (11) from a combination of the measurement signal and the discrepancy signal.
Abstract:
L'invention porte sur une baie modulaire de puissance destinée à un aéronef comprenant une pluralité de machines électriques (11), une pluralité d'onduleurs (10), et un organe de pilotage (13b) configuré pour affecter à au moins une machine (11) un ou plusieurs onduleurs (10), en fonction des besoins opérationnels de la pluralité de machines (11). L'organe de pilotage (13b) comprend : - un observateur (14b), apte à mesurer des courants de phase (i a , i b , i c ) et tensions de phase-neutre (V a , V b , V c ) d'un signal électrique d'alimentation de ladite machine (11), - un estimateur (15b), apte à déterminer une position rotorique ( θ ), à partir des mesures d'au moins un observateur (14b), - des moyens de communication (16b), vers chacun des onduleurs (10) : o d'une consigne de pilotage de chacun des onduleurs (10) pour répondre au besoin opérationnel de ladite machine (11), o des mesures d'au moins un observateur (14b), ou de la position rotorique estimée ( θ ).
Abstract:
The present invention relates to the technical field of controlling converters. The invention relates to a control system (2) and a method for controlling a converter (1) in particular used for single-phase traction applications. The control system (2) comprising a voltage controller (18) for controlling an output DC-voltage of the AC-/DC converter (1) to a reference output DC-voltage of the AC-/DC converter (1); a current controller (19) for controlling a line current to a reference line current of the AC-/DC converter (1); an observer (14) connected to the voltage controller (18) in order to estimate an offset of an output DC-voltage of the AC-/DC converter (1) from a reference output DC-voltage due to disturbances caused by a grid (6) connected to the AC-/DC converter (1) entering the AC-/DC converter (1); and that the voltage controller (18) and / or current controller (19) of the control system (2) having a logic model that is Model Predictive Control to predict the dynamic behavior of the AC-/DC converter (1) influenced by the disturbances caused by the grid (6) entering the AC-/DC converter (1) and in order to generate an input voltage or an input current for the AC-/DC converter (1) to compensate for deviations of the output DC-voltage or the line current of the AC-/DC converter (1) from a reference output DC-voltage or a reference line current due to disturbances caused by the grid (6) entering the AC-/DC converter (1) in an operative state of the AC-/DC converter (1).
Abstract:
A system and method for detecting input phase loss in an adjustable speed drive (ASD) includes an input unit to detect operating data from the ASD. The operating data includes a DC link current of the ASD. The system also includes a state observer that is adapted to receive the operating data from the input unit and extract a DC link capacitor current of the ASD using the DC link current. The system also includes a controller programmed to compare the extracted DC link capacitor current to a predetermined fault range and generate a fault indication of an input phase loss if the extracted DC link capacitor current is within the predefined fault range. The controller is also programmed to calculate an estimated lifespan of the DC link capacitor based on the extracted DC link capacitor current.
Abstract:
A control device (11) for controlling an electric machine (22) with ks windings on a stator and kr windings on a rotor, wherein ks + kr = n and wherein either one of ks and k r may be zero, comprises an input via (12) which control commands are capable of being received in real-time and an output (14) via which control commands to a driver (21) of the electric machine are capable of being output in real-time; machine modeling means (15) provided for modeling the behavior of the electric machine in real-time; and decision means (16) operatively connected to the input, the output, and the machine modeling means and, in real-time, provided for (i) determining the control commands to be output to the driver of the electric machine based on input control commands and results from the modeling of the behavior of the electric machine, and (ii) outputting the determined control commands at the output. -The machine modeling means is provided for modeling the behavior of the electrical machine through at least one functional mapping suited for correlating sets of values of electrical and mechanical quantities and/or sets of values of their total or partial derivatives and/or integral functions with one another, wherein the electrical and mechanical quantities comprise winding currents, winding voltages, magnetic fluxes, mechanical displacements, and/or electromagnetic torques or forces; and the functional mapping comprised of at least one algorithm and/or mathematical equation based on at least one state function associated with the electromagnetic field inside the electrical machine and/or based on at least one partial derivative of said state function.
Abstract:
The invention relates to a method and a device for acquiring information on the position of the rotor shaft of an electrical machine (12), using a sensor signal that can be associated with an angle of rotation and at least one input signal (13, 14) of the electrical machine (12). The method comprises the following steps: acquiring a sensor signal that can be associated with the angle of rotation and at least one input signal (13, 14) at a time tk; acquiring information on the position of the rotor shaft at a time tk, using the acquired sensor signal and the at least one input signal (13, 14); acquiring a sensor signal that can be associated with the angle of rotation and the at least one input signal (13, 14) at a time tk+1; acquiring information on the position of the rotor shaft at a time tk+1, using the acquired sensor signal and the at least one input signal (13, 14); the information on the position of the rotor shaft being acquired between the times tk and tk+1 using a Kalman filter (11, 44), based on the acquired sensor signal that can be associated with the angle of rotation and the at least one input signal (13, 14).