Abstract:
Dispositif électronique (1), apte à commander un moteur à courant continu, comprenant un « pont en H » avec un interrupteur supérieur gauche (R1), un interrupteur supérieur droit (R2), un interrupteur inférieur gauche (R3) et un interrupteur inférieur droit (R4), la deuxième borne (R1b) de l'interrupteur supérieur gauche étant reliée à la deuxième borne (R3b) de l'interrupteur inférieur gauche, la deuxième borne (R2b) de l'interrupteur supérieur droit étant reliée à la deuxième borne de l'interrupteur inférieur droit, caractérisé en ce qu'il est modifié en coupant la liaison entre la deuxième borne de l'interrupteur supérieur gauche et la deuxième borne de l'interrupteur inférieur gauche et en coupant la liaison entre la deuxième borne de l'interrupteur supérieur droit et la deuxième borne de l'interrupteur inférieur droit.
Abstract:
The invention relates to a method for operating a capacitive actuator (P1) which is connected to an output connection (A) of an apparatus which is formed with a first capacitor (C1) arranged between an input connection (E) of the apparatus and a reference potential (GND), with a full bridge which is connected in parallel with said capacitor and consists of four power switching elements (T1, T2, T3, T4), and with a first coil (L1) which is connected between the bridge paths. In order to charge the capacitive actuator (P1), a control circuit (Control) first of all turns on the first and third power switching elements (T1, T3), with the result that a current can flow from the first capacitor (C1) via the first coil (L1), as a result of which energy is stored in the coil (L1). When a predefined maximum current value is reached, the first and third power switching elements (T1, T3) which have been previously switched on are switched off again, with the result that the magnetic energy stored in the first coil (L1) decays as a result of a current flow via the diode (D2) of the second power switching element (T2) and the diode (D4) of the fourth power switching element (T4), as a result of which the capacitive actuator (P1) is charged to a corresponding voltage, and the capacitive actuator (P1) is charged to a predefined voltage by repeatedly switching the first and third power switching elements (T1, T3) on and off, if necessary.
Abstract:
A solenoid actuator is described. The solenoid actuator comprises an armature, pole piece(s), electromagnet coil(s) arranged, in response to energisation, to cause travel of the armature between first and second positions along a direction of travel, permanent magnet(s) positioned and orientated for latching the armature in at least the first position when the armature is in the first position and spring(s) arranged to bias the armature. The solenoid actuator can be operated to provide partial lift.
Abstract:
An electronic high frequency induction heater driver, for a variable spray fuel injection system, uses a scalable array of zero-voltage switching oscillators that utilize full and half-bridge topology wherein the semiconductor switches are synchronous within each bridge for function, and each bridge is synchronized for function along the entire array. The induction heater driver, upon receipt of a turn-on signal, multiplies a supply voltage through a self-oscillating series resonance, wherein one component of each tank resonator circuit comprises an induction heater coil magnetically coupled to an appropriate loss component so that fuel inside a fuel component is heated to a desired temperature.
Abstract:
A device for controlling and regulating the current flowing through an electromagnetic consumer has a bridge circuit, the consumer being located on one of the diagonals thereof. Four current control elements of the type logic-level power MOSFET are connected in pairs to a voltage regulating circuit for gate voltage supply and to a current control circuit for gate voltage control. At least one precision resistor is connected to a terminal of the second diagonal.
Abstract:
Die Erfindung betrifft eine Anordnung mit einem ferromagnetischen Werkstück (11) und einer um zumindest einen Abschnitt des Werkstücks (11) angeordneten Heizwicklung (14) zur induktiven Heizung des Werkstücks (11), bei der zwischen dem Werkstück (11) und der Heizwicklung (14) eine Schicht aus gut leitendem Material (12) angeordnet ist. In Weiterbildung kann die Heizwicklung (14) an ihren nicht dem Werkstück (11) zugewandten Seiten von einem ferromagnetischen Material (15) umgeben sein, das im Bereich der Enden der Heizwicklung (14) in Kontakt mit dem Werkstück (11) ist und in Längsrichtung der Heizwicklung (14) zumindest eine durchgehende Unterbrechung aufweist.
Abstract:
An integrated H-bridge electrical harness for controlling an actuator, such as a stepper motor, where the harness includes a signal converter in electrical communication with an ECU, a driver in electrical communication with the signal converter, and a plurality of connectors. At least one of the connectors provides a connection with the ECU, and another of the connectors provides a connection with an actuator. The signal converter receives a first type of signal (such as a pulse width modulated signal) from the ECU, and converts the first type of signal to a second type of signal, and the signal converter sends the second type of signal to the driver. The driver sends a third type of signal (such as a double square wave signal) to the actuator to control the actuator.
Abstract:
Die Erfindung betrifft ein Verfahren zum Betrieb eines kapazitiven Stellgliedes (P1), das mit einem Ausgangsanschluss (A) einer Vorrichtung verbunden ist, die mit einem zwischen einem Eingangsanschluss (E) der Vorrichtung und einem Bezugspotential (GND) angeordneten ersten Kondensator (C1), mit einer zu diesem parallel geschalteten Vollbrücke aus vier Leistungsschaltelements (T1, T2, T3, T4), mit einer ersten Spule (L1), die zwischen den Brückenzweigen verschaltet ist, gebildet ist. Zum Laden des kapazitiven Stellgliedes (P1) werden zunächst von einer SteuerSchaltung (Control) das erste und das dritte Leistungsschaltelement (T1, T3) leitend gesteuert, sodass ein Strom vom ersten Kondensator (C1) über die erste Spule (L1) fließen kann, wodurch Energie in der Spule (L1) gespeichert wird. Bei Erreichen eines vorgegebenen maximalen Stromwerts werden das zuvor eingeschaltete erste und dritte Leistungsschaltelement (T1, T3) wieder ausgeschaltet, sodass sich die in der ersten Spule (L1) gespeicherte magnetische Energie durch einen Stromfluss über die Diode (D2) des zweiten Leistungsschaltelements (T2) und die Diode (D4) des vierten Leistungsschaltelements (T4) abbaut, wodurch sich das kapazitive Stellglied (P1) auf eine entsprechende Spannung auflädt, und durch gegebenenfalls wiederholtes Ein- und Ausschalten des ersten und dritten Leistungsschaltelements (T1, T3) wird das kapazitive Stellglied (P1) auf eine vorgegebene Spannung aufgeladen.
Abstract:
The invention relates to the control of an inductive load by pulse width modulation from a periodic setpoint control signal having a given setpoint duty cycle. The setpoint control signal is, at each period of said setpoint control signal, in a first logic state determined from the high and low logic states during at least a first duration and in the other logic state during the rest of the period. Control signals (S21, S31) activating the inductive load are generated from the setpoint control signal (PWM). Using a first counter (3), the first duration (t0) is determined from the setpoint control signal (PWM). Using a second counter (4), a second duration (t0-td2) is determined during which a logic signal (L_Out) corresponding to an effective control signal (V,OUT) observed at the load (O1) is in the first determined logic state. The second duration, increased by the inertia td2, is slaved to the first duration. Therefore an effective duty cycle is equal to a setpoint duty cycle.
Abstract:
A solenoid actuator is described. The solenoid actuator comprises an armature, pole piece(s), electromagnet coil(s) arranged, in response to energisation, to cause travel of the armature between first and second positions along a direction of travel, permanent magnet(s) positioned and orientated for latching the armature in at least the first position when the armature is in the first position and spring(s) arranged to bias the armature. The solenoid actuator can be operated to provide partial lift.