Abstract:
Die Erfindung betrifft ein Verfahren zum Betreiben von Schaltelementen (20,22,24,26,28,30) eines Wechselrichters (16,18) eines mittels einer dreiphasigen Synchronmaschine (12,14) angetriebenen Fahrzeugs (10), bei dem der Wechselrichter (16,18) für die Phasen (U1,V1,W1) eine Reihenschaltung aus den Schaltelementen (20,22,24,26,28,30) aufweist, wobei bei einem Abbremsen des Fahrzeugs (10) mittels der Synchronmaschine (12,14) eine Taktrate zum Betreiben der Schaltelemente (20,22,24,26,28,30) abhängig von einer Frequenz von Phasenwechselströmen (i u ,i v / i w ) der Synchronmaschine (12,14) eingestellt wird, sodass von der Synchronmaschine (12,14) bereitgestellte elektrische Energie dem Gleichspannungszwischenkreis (38) zugeführt wird, wobei die Taktrate entsprechend der Frequenz der Phasenwechselströme (i u ,i v ,i w ) eingestellt wird, sodass sie der Frequenz der jeweiligen durch die Synchronmaschine (12,14) bereitgestellten Phasenwechselströme (i u , i v , i w ) entspricht, wobei Nullstellen der Phasenwechselströme (i u ,i v ,i w ) ermittelt werden und die Schaltelemente (20,22,24,26,28,30) derart betrieben werden, dass zwischen dem jeweiligen der Phasenwechselströme (i u ,i v ,i w ) und einer jeweils zugeordneten Phasenwechselspannung (u u ,u v ,u w ) eine vorgegebene Phasendifferenz eingestellt wird.
Abstract:
The invention relates to a unit comprising an electric power source including at least two elements of different technologies and an inverter for controlling an alternating-current electric motor, said driving inverter comprising: an alternating-current generator (3) that delivers a current to a terminal (4) intended to be connected to the phases of an electric motor (6); a supply line (20); an alternating-current collector (41, 42) on certain phases supplying the electric motor; a current collector (21) on the supply line; an input (52) receiving information including at least one "source current limit" value and a requested torque setpoint; and a controller (5) controlling the phase currents of the electric motor as a function of the torque setpoint, while maintaining the supply line current at an acceptable value depending on the source current limit. Consequently, a maximum current can be imposed at any time on the current source without risk of impairing same.
Abstract:
In an electrically powered vehicle, a computer-controlled switching system activates relays to switch additional discrete batteries into a circuit in response to throttle level, where a processor is configured to decide what specific batteries should be present in the circuit at any given time, in response to both throttle level and a battery load balancing optimization scheme.
Abstract:
A utility vehicle includes an electric motor constructed to provide motive power to the utility vehicle; a lithium ion battery pack coupled to the electric motor at a first voltage and operative to provide electrical power at the first voltage to the electric motor for driving the utility vehicle, the lithium ion battery pack including a DC/DC converter constructed to output electrical power at a second voltage; and a vehicle control module (VCM) coupled to the DC/DC converter, constructed to operate at the second voltage and constructed to control at least some operations of the utility vehicle.
Abstract:
Die Erfindung betrifft ein Verfahren zur Steuerung eines elektrischen Antriebs eines Kraftfahrzeuges mittels eines Steuerungssystems (1), wobei das Steuerungssystem (1) eine Ausfallsicherungssteuerung an einer Leistungselektronik (2) einer elektrischen Maschine (3) des Antriebs durchführt, indem ein Initialsystem (4) des Steue- rungssystems (1) in einem ersten Betriebszustand und ein Rückfallsystem (5) des Steuerungssystems (1), das hinsichtlich seines Steuerungsschemas gegenüber dem Initialsystem (4) vereinfacht ausgebildet ist, in einem zweiten Betriebszustand die elektrische Maschine (3) über die Leistungselektronik (2) steuert. Zudem betrifft die Erfindung ein Computerprogrammprodukt, das dazu ausgelegt ist, dieses Verfahren durchzuführen.
Abstract:
A direct -drive brushless DC motorization apparatus comprises an outer rotor with poles constructed with segments of permanent magnet material alternatively magnetized north and south. The outer rotor is adapted to be part of a wheel and rotating with the wheel about an axis thereof. A stator core of ferromagnetic material is spaced inwardly of said rotor to define a clearance gap with the rotor such that the rotor is rotatable about the stator core. The stator core has forty-two slots and defines teeth therebetween. A three-phase winding with coils of insulated wire is wound around the teeth of the stator core. The three-phase winding is divided in two sets of consecutive teeth for each of the three phases, with each of the two sets of a same phase being diametrically opposed in the stator core.
Abstract:
There is provided an electric dynamic drive train for electric vehicles (EVs), the electric dynamic drive train including a high frequency direct current (DC)-DC converter and a DC-alternative current (AC) inverter. The high frequency DC-DC power converter includes a DC-DC controller connected to one or more core cells comprising a driver, a half-bridge connected to the driver, the half-bridge including high and low sides transistors in thermal contact with a cooling system including a heat spreader, an inductor and a capacitor connected to the half-bridge and a capacitor connected to the inductor. The high frequency DC-DC power converter enables having an almost instantaneous response time by reducing voltage drops between transients, enables generating a clean waveform signal improving the longevity of connected components, and enables the inverter and the motor in the EVs to be sized apart from one to another.
Abstract:
A power system for driving a direct current (DC) electric motor that is controlled by a driving voltage (VD), the power system comprising: a plurality of cell modules (110, 210, 310), each cell module (110, 210, 310) comprising one or more cells (111, 211, 311); a plurality of connectors (120, 220) for connecting the cell modules (110, 210, 310) to form a configurable battery to generate the driving voltage (VD); wherein the connectors (120, 220) are configured to connect the cell modules (110, 210, 310) into configurable clusters; and a voltage level controller (21) configured to control the configuration of the configurable clusters to provide the driving voltage (VD) at one of a set of selectable voltage levels, wherein for each voltage level of said set a share of a current drawn from each of the cell modules (110, 210, 310) with respect to a total current drawn from the configurable battery is lower than for each higher voltage level of said set.
Abstract:
Installation comprenant une source d'énergie électrique comportant au moins deux éléments de technologies différentes et un onduleur de pilotage d'un moteur électrique à courant alternatif, ledit onduleur de pilotage comportant un générateur de courant alternatif (3) délivrant un courant à un bornier (4) destiné à être connecté aux phases d'un moteur électrique (6), une ligne d'alimentation (20), un capteur de courant alternatif (41, 42) sur certaines phases alimentant ledit moteur électrique, un capteur de courant (21) sur la ligne d'alimentation, une entrée (52) recevant des informations comprenant au moins une valeur de « courant limite de la source », et une consigne couple demandé, et un contrôleur (5) pilotant les courants de phase du moteur électrique en fonction de la consigne couple et en maintenant le courant de la ligne d'alimentation à une valeur acceptable en fonction du courant limite de la source. En conséquence, on peut toujours imposer à la source de courant un courant maximal sans risque de la dégrader.