Abstract:
The present invention relates to the calculation method of the maximum available torque that can be applied by the system and operating conditions in electric and hybrid vehicle applications, within the limits determined as motor and motor driver temperature, battery current and voltage information, output power, motor line current, acceleration limit and start up condition.
Abstract:
System for operating an electric tractive unit. The invention relates to a system (1) for operating an electric tractive unit (10), having a contact line system (20) which is arranged along a route (2) of the tractive unit (10). In this context, a current collector (11) of the tractive unit (10) for transmitting energy can be placed in sliding contact with a contact line (23) of the contact line system (20). In addition, the contact line (23) is divided by a section insulator (24), along which the current collector (11) can travel with sliding contact, into contact line sections (23a, 23b) which are supplied with electricity separately from one another. According to the invention, a detection device (30) is designed to detect when travel over the section insulator (24) by tractive unit (10) is imminent. Said detection device (30) interacts with a drive controller (13) for an electric drive (12) of the tractive unit (10) in such a way that transmission of energy via the current collector (11) while the section insulator (24) is being travelled over is automatically reduced or switched off. As a result, the wear on section insulators (24) can be reduced.
Abstract:
Die Erfindung betrifft ein Verfahren zur Reduktion einer Antriebsleistung eines Fahrzeugantriebs mit Erfassen (101) eines Temperaturunterschieds zwischen einer Temperatur zumindest einer Komponente des Fahrzeugsantriebs und einem Temparaturschwellwert, Erfassen (103) eines gegenwärtigen Fahrzustandes des Fahrzeugantriebs, Feststellen (105), ob der gegenwärtige Fahrzustand eine Reduktion der Antriebsleistung zulässt oder nicht zulässt, und Reduzieren (107) der Antriebsleistung des Fahrzeugantriebs zur Senkung der Temperatur der zumindest einen Komponente, um den Temperaturunterschied zu erhöhen, falls der gegenwärtige Fahrzustand die reduzierte Antriebsleistung zulässt.
Abstract:
Die Erfindung betrifft ein Verfahren zum Betreiben eines Spannungswandlers (1), insbesondere Gleichspannungswandler, eines Kraftfahrzeugs, der zumindest zwei parallel geschaltete Wandlerstränge (4, 5) aufweist, die zwischen einer Hochspannungsseite (2) und einer Niederspannungsseite (3) des Spannungswandlers (1) zum Wandeln der Spannung geschaltet sind, mit wenigstens einer ein Kühlmittel (9) führenden und den Wandlersträngen (4, 5) zugeordneten Kühleinrichtung (8), wobei jedem der Wandlerstränge (4, 5) wenigstens ein Temperatursensor (6, 7) zugeordnet ist, mit folgenden Schritten: a) Erfassen einer Eingangsspannung, einer Ausgangsspannung und eines Betriebsstroms jedes Wandlerstrangs (4, 5), b) Erfassen einer aktuellen Wandlerstrangtemperatur mittels des jeweiligen Temperatursensors (6, 7), c) Ermitteln je einer Kühlmitteltemperatur in Abhängigkeit von den in den Schritten a) und b) erfassten Werten, d) Vergleichen der zwei ermittelten Kühlmitteltemperaturen (T_1,T_2) miteinander und e) Bestimmen der Funktionsfähigkeit der Temperatursensoren (6, 7) in Abhängigkeit von dem Ergebnis des Vergleichs.
Abstract:
The invention relates to a method for operating an electrical machine (1) controlled by an inverter (2), wherein the inverter (2) comprises half-bridge branches (10-U, 10-V, 10-W) having power components in the form of controllable power switching elements (3) and power diodes (4) respectively connected in parallel therewith, wherein each of the half-bridge branches (10-U; 10-V; 10-W) is arranged on a separate semiconductor module (11-U; 11-V; 11-W), which are arranged jointly on a baseplate (12), wherein the phase currents (l_U, l_V, l_W) flowing through the half-bridge branches (10-U, 10-V, 10-W), the voltages present at the power components and temperatures (t_Sens_U, t_Sens_V, t_Sens_W) on the semiconductor modules (11-U, 11-V, 11-W) are determined, from the current (l_U; l_V; l_W) respectively flowing at a power component and from the voltage respectively present a power loss (P) is calculated for each of the power components, from the power losses (P) a relevant temperature swing (Deltat; Deltat_Sens) is determined for each of the power components and for temperature sensors (13-U, 13-V, 13-W) serving to determine the temperatures on the semiconductor modules, a temperature (TempCooler) of the baseplate (12) is determined from the determined temperatures (t_Sens_U, t_Sens_V, t_Sens_W) on the semiconductor modules (11-u, 11-V, 11-W) and the determined temperature swings (Deltat_Sens) at the temperature sensors (13-U, 13-V, 13-W), and a torque or a power of the electrical machine (1) is determined in a manner dependent on the determined temperature swings (Deltat) and the determined temperature (TempCooler) of the basplate (12).
Abstract:
There is provided an electronic device that includes a heatsink and a set of IGBTs coupled to the heafsiiik and configured to deliver power to a field exciter and a battery. The electronic device also includes a temperature sensor disposed in the heatsink and a controller. The controller is configured lo receive a temperature reading from the temperature sensor and, based on the temperature reading, determine a junction temperature for ai least one of the IGBTs of the set of IGBTs. The controller is also configured to de-rate an output power provided by each of the IGBTs based, at least in part, on the junction temperature.
Abstract:
A drive system for a motorised bicycle which omprises an electrical motor for driving the motorised bicycle. The electrical motor has a first electric overload power limit which constitutes a limit for electrical power supplied to the electric motor above which first electric overload power limit the electric motor reaches a thermal overload on a long term basis, A battery is provided for supplying electric drive power to the electrical motor for driving the bicycle.. The battery has a second electric overload power limit which constitutes a limit of electric power drawn from the battery above which second electric overload power limit the battery reaches a thermal overload on a long term basis. A control unit is connected to the electrical motor and the battery for controlling the supply of the electric drive power from the battery to the electrical motor and for exclusively selecting a first level of the electric drive power from a first range of electric drive power levels. The first range of electric drive power levels has a maximum power level being equal to or smaller than the first electric overload power limit and/or the second electric overload power limit.