摘要:
Circuit de commande d'un dispositif à semi-conducteur (SC), comportant des moyens interrupteurs (M) aptes à établir un court-circuit entre la gâchette et la cathode dudit dispositif sous l'action d'une commande extérieure, caractérisé par une résistance (R Ga ) d'assistance à l'auto-allumage reliant le pôle positif du circuit (A) à sa sortie de commande de gâchette (G).
摘要:
Schaltungsanordnung (2) zur Ansteuerung einer zündbaren Halbleiterschaltung (1) mit einem Zündungssteuereingang (3), um die Leistungsaufnahme eines elektrischen Verbrauchers (M), insbesondere eines Elektromotors in einer Elektrowerkzeugmaschine, zu steuern. Es ist vorgesehen, dass eine Überwachungsanordnung (4) eingerichtet ist, um eine elektrische Spannung an einem Anschlusspunkt (A 1 ) der zündbaren Halbleiterschaltung (1) und/oder an einem Anschlusspunkt (A M ) des elektrischen Verbrauchers (M) zu überwachen und einen Zündimpuls an dem Zündungssteuereingang (3) der zündbaren Halbleiterschaltung (1) zu erzeugen, wobei eine von der überwachten elektrischen Spannung unabhängige Spannungsquelle bzw. Stromquelle (5) zur Erzeugung des Zündimpulses bereitgestellt ist.
摘要:
Light-dimming device (10) includes: first and second terminals (1, 2); switch (3) including switching device (7) connected between terminals (1, 2); adjuster (6) for varying conduction angle of switch (3); controller (4) for controlling switch (3) and power supply module (5) for supplying power to controller (4). Controller (4) includes zero-cross detection circuit (9) for detecting zero-cross of AC voltage (Va), control circuit (11) for generating PWM signal of on-duty ratio corresponding to conduction angle from adjuster (6), and driver circuit (8) for turning device (7) on and off by PWM signal. Controller (4) allows device (7) to conduct and then turn off within variable period of time, from start of half cycle of AC voltage, shorter than half cycle. Circuit 11 starts generation of pulse in PWM signal when prescribed period of time, shorter than variable period of time, from zero-cross of voltage Va elapses.
摘要:
A triac circuit comprises a triac having first and second main terminals (MT1,MT2) and a gate terminal and a thyristor connected between one of the main terminals (MT1,MT2) and a control terminal of the triac circuit. The thyristor is used to prevent turn on of the triac when it has turned on by temperature induced leakage currents.
摘要:
The invention relates to a domestic appliance (1) having a first and a second electrical connection (4, 5), it being possible to apply an electrical supply system voltage (UN) between said electrical connections, having an electrical load (3), and having a supply system switch device (6) by means of which the electrical load (3) can be coupled to the connections (4, 5), wherein the supply system switch device (6) comprises: a first thyristor (7) which is connected between the first connection (4) and the electrical load (3) and of which the anode is coupled to the first connection (4) and of which the cathode is coupled to the electrical load (3); a second thyristor (8) which is connected between the second connection (5) and the electrical load (3) and of which the anode is coupled to the electrical load (3) and of which the cathode is coupled to the second connection (5); and a triggering device (10) for triggering the thyristors (7, 8). The triggering device (10) has an electrical switch (10) which is common to both thyristors (7, 8) and by means of which an electrical triggering current can be applied to a gate connection (9) of the first thyristor (7) and to a gate connection (11) of the second thyristor (8).
摘要:
The present invention relates to a control unit (1) that decreases the energy consumption of household appliances in standby mode, comprising a power source unit (3) connected to the power line (L1, L2) supplying AC electric current received from the mains, generating low voltage DC feed currents for the electronic elements to be operated, a microprocessor (4) fed with the low voltage current generated by the power source unit (3), a switching line (5) that converts the electric current received from the mains to milliampere scale control current, a button (6) that switches the low value current passing through the switching line (5), providing the switching line (5) to transmit electric current by shifting to active mode when pressed on by the user, providing the current passing through the switching line (5) to be cut off by shifting to passive mode when the user takes off his/her hand.
摘要:
A solid state relay includes a light-receiving element, output terminals configured to connect to an AC power supply and a load, a first connection line connecting a first end of the light-receiving element to a first output terminal, a second connection line that connects a second end of the light-receiving element to a second output terminal, a switching element between the first connection line and the second connection and configured to be turned on by the current outputted from the light-receiving element, and a snubber circuit in which a capacitor and a resistor are connected in series. The resistor of the snubber circuit connects to the first connection line between one of the first and second end of the light-receiving element and an end of the switching element, and an over-current protection element connects to the first connection line between the resistor and an end of the switching element.
摘要:
An AC power switching module comprises: AC current input (V1) and output (V5) means; a thyristor (17) located between said input and output means for selectively blocking or passing said AC current, said thyristor having a gate input (V4) for activating said thyristor to cause said AC current to pass; and activation means for sending a pulsed activation signal (V4) to said gate input and thus activate said thyristor, said activation means being caused to send said activation signal upon receipt of an enabling command signal. The activation means comprises means for, upon receipt of an enabling command signal (14), gradually increasing the duty cycle of the activation signal until it reaches a steady value. Said means are a zero crossing point detector (12), a sawtooth waveform generator (13), a ramp generator circuit (15) and a comparator (16).
摘要:
Featured is igniter control circuitry that reduces the line voltage to the igniter and which maintains the igniter voltage relatively stable. More particularly, there is featured, a thyristor-based phase control circuit that reduces the RMS voltage being applied to an igniter when it is connected to the AC line or line voltage. The circuitry also is configured so that it opposes changes in line voltage such that the igniter voltage remains relatively stable when the line voltage increases or decreases relative to its nominal level. Such control circuitry includes a dual diac configuration, a relation oscillator configuration and one embodying both dual diac and relation oscillator configurations.