摘要:
Dans ce coupleur, le circuit de polarisation de la diode photoémettrice (DE) comprend une source de tension haute fréquence (20) reliée à un transformateur haute fréquence (TR) et un circuit redresseur (22) inséré entre ce transformateur (TR) et la diode photoémettrice (DE). Application dans la réalisation d'équipements électroniques.
摘要:
A terminal circuit in an inverter is disclosed, the terminal circuit including a photo-coupler configured to electrically insulate input/output signals, to receive, as input, an open collector output signal or a pulse output signal from a first port and to output the open collector output signal or the pulse output signal to a second port through a first output terminal, a transistor in which a base (B) terminal is connected to a second output terminal of the photo-coupler. And a bias resistor connected to a base (B) terminal of the transistor and to an emitter (E) terminal.
摘要:
Eine Versorgungsspannung-Erzeugungseinheit eines Steuergeräts mit Safe-Torque-Off-Funktion umfasst einen Schwingkreis (4), der nur dann ein Schwingungssignal (U3) an einem Schwingungssignalausgang erzeugt, wenn eine Schwingkreisversorgungsspannung (U4) vorhanden ist, wobei die Schwingkreisversorgungsspannung (U4) nur dann vorhanden ist, wenn ein zweites Aktuatorsignal (U2) den Betriebszustand anzeigt, ein zweites, insbesondere galvanisch trennendes, Übertragungsmittel (5), das eingangsseitig zwischen einen ersten Aktuatorsignal-Anschluss (1) und den Schwingungssignalausgang eingeschleift ist, eine Verstärkerschaltung (6), die ein Signal (U6) am Ausgang des zweiten Übertragungsmittels (5) verstärkt und als verstärktes Signal (U7) ausgibt, eine Entkopplungsschaltung (7), die das verstärkte Signal (U7) filtert, indem ein Gleichanteil aus dem verstärkten Signal (U7) entfernt wird, und das gefilterte Signal (U8) ausgibt, und einen Gleichrichter (8), der aus dem gefilterten Signal (U8) eine Versorgungsspannung (U5) für erste Übertragungsmittel erzeugt, die zur Ansteuerung von Leistungshalbleitern dienen.
摘要:
There is provided an electronic device comprising: a plurality of switching elements connected to a power supply; a plurality of specific information storage units provided for the corresponding switching elements and configured to store specific information of respective corresponding switching elements; a processing unit configured to control the switching elements; and a communication line disposed between the specific information storage units and the processing unit, through which the specific information of the respective switching elements is sent from the specific information storage units to the processing unit.
摘要:
There is provided an electronic device comprising: a plurality of switching elements connected to a power supply; a plurality of specific information storage units provided for the corresponding switching elements and configured to store specific information of respective corresponding switching elements; a processing unit configured to control the switching elements; and a communication line disposed between the specific information storage units and the processing unit, through which the specific information of the respective switching elements is sent from the specific information storage units to the processing unit.
摘要:
A discharge device (11) and method for actively discharging a main capacitor (C filter ) in an electric power system (1) of an electric drive vehicle; a discharge branch (13) is connected in parallel to the main capacitor (C filter ) and is provided with a discharge transistor (TD) which, when discharging the main capacitor (C filter ) is required, must be biased to conduction mode; a control device (14) is connected to the gate/base terminal of the discharge transistor (TD), controls the discharge transistor (TD) by biasing the discharge transistor (TD) to conduction mode when discharging the main capacitor (C filter ) is required, and has a control transistor (TC) which maintains the discharge transistor (TD) isolated when it is in the conduction mode and must be isolated in order to allow the discharge transistor (TD) to conduct.
摘要:
Die Erfindung betrifft eine Schaltungsanordnung für einen Opto-Schmitt-Trigger, bei der mittels eines Fotoempfangselements (1), einer Verstärkerstufe (2), einer Schmitt-Trigger-Stufe (3) und einer Ausgangsstufe (4) ein optisches Eingangssignal in ein elektrisches Ausgangssignal umgewandelt wird. Erfindungsgemäß ist vorgesehen, daß die Verstärkerstufe (2) eine Transimpedanzverstärkerstufe (2.1), eine Differenzverstärkerstufe (2.3), ein erstes Referenznetzwerk (2.2) sowie ein Kompensationsglied (2.4) enthält, daß die Schmitt-Trigger-Stufe (3) aus einer Differenzverstärkerstufe (3.1), einem zweiten Referenznetzwerk (3.2) sowie aus einem Mitkoppelzweig (3.3) besteht, und daß das Ausgangssignal (U₄) am Schaltungsausgang (A) der Ausgangsstufe (4) anliegt.
摘要:
The present invention is a switch mode current control circuit which is particularly useful with step motors. The circuit has a first transistor, a coil and a first resistor connected in a series with a first voltage source. An opto coupler having a light emitting diode and a second transistor therein has the light emitting diode connected across the first resistor and the second transistor is connected across the base emitter junction of the first transistor. A second resistor is connected to the base of the first transistor and to the second voltage source. A diode is connected across the coil.
摘要:
Gate drivers circuit, for a half-bridge of a converter (100) where a first switching device (SH), having a first gate, and a second switching device (SL), having a second gate, are controlled independently and in a complementary way respectively through a first gate driver buffer (1a) and a second gate driver buffer (1b), by a controller (60) providing gate pull up and gate pull down pulse signals to the first and second gate drivers buffers, characterized in that said gate drivers circuit comprises an overlapping protection circuit comprising: - on a source branch of said first gate driver buffer (1a) a first gate current mirroring circuit (32a) to provide a first detection signal upon turning on of said first gate driver buffer and a first detection circuit (33a) for processing and transferring said first detection signal to a second protection circuit (34b) of said second gate buffer (1b) configured to turn off said second switching device (SL) upon occurrence of said first detection signal; - on a source branch of said second gate driver buffer (1b) a second gate current mirroring circuit (32b) to provide a second detection signal upon turning on of said second gate driver buffer and a second detection circuit (33b) for processing and transferring said first detection signal to a first protection circuit (34a) of said first gate buffer (1a) configured to turn off said first switching device (SH) upon occurrence of said second detection signal.