48 results about "TRIAC" patented technology

System and method for controlling one or more light emitting diodes. For example, the system for controlling one or more light emitting diodes includes a current regulation circuit coupled to a cathode of one or more light emitting diodes. The one or more light emitting diodes include the cathode and an anode configured to receive a rectified voltage. Additionally, the system includes a control circuit coupled to the cathode of the one or more light emitting diodes. The control circuit is configured to receive a first voltage from the cathode of the one or more light emitting diodes, compare a second voltage and a threshold voltage, and generate a control signal based at least in part on the second voltage and the threshold voltage. The second voltage indicates a magnitude of the first voltage.

System and method for controlling one or more light emitting diodes. For example, the system includes: a current regulator including a first regulator terminal and a second regulator terminal, the first regulator terminal being configured to receive a diode current flowing through the one or more light emitting diodes, the current regulator being configured to generate a sensing signal representing the diode current, the second regulator terminal being configured to output the sensing signal; a bleeder controller including a first controller terminal and a second controller terminal, the first controller terminal being configured to receive the sensing signal from the second regulator terminal, the bleeder controller being configured to generate a first bleeder control signal based at least in part on the sensing signal, the second controller terminal being configured to output the first bleeder control signal.

System and method for controlling one or more light emitting diodes. For example, the system includes: a phase detector configured to process information associated with a rectified voltage generated by a rectifier and related to a TRIAC dimmer, the rectified voltage corresponding to a first waveform during a first half cycle of an AC voltage and corresponding to a second waveform during a second half cycle of the AC voltage, the phase detector being further configured to generate a phase detection signal representing a first time duration during which the first waveform indicates that the rectified voltage is larger than a predetermined threshold and representing a second time duration during which the second waveform indicates that the rectified voltage is larger than the predetermined threshold; and a mode detector configured to process information associated with the rectified voltage.

System and method for controlling one or more light emitting diodes. For example, the system for controlling one or more light emitting diodes includes a current generator configured to generate a first current flowing through one or more light emitting diodes. The one or more light emitting diodes are configured to receive a rectified voltage generated by a rectifying bridge coupled to a TRIAC dimmer. Additionally, the system includes a bleeder configured to receive the rectified voltage, and a controller configured to receive a sensing voltage from the current generator and output a control signal to the bleeder. The sensing voltage indicates a magnitude of the first current.

An apparatus, system, and method for controlling household appliances and reducing energy consumption through load control and demand management which includes a PCB module adapted to determine an appliance's power status and power consumption and demand, and which includes a solid state industrial grade primary TRIAC semiconductor, a microcontroller with WiFi capabilities, a number of optotriacs, a current sensor, and three PCB-integrated terminal pads. A PCB module is electrically attached to each respective chosen household appliance, wirelessly connects with each other PCB module in use, and then measures and controls the power consumption of each connected appliance using load control in order to more efficiently track, manage, and conserve household energy use and costs during peak and off-peak household energy use hours, through demand management, automatically and with no user engagement or impact.

An electrical receptacle contains a plug outlet that has a pair of contacts for electrical connection to respective hot and neutral power lines. A controlled switch, such as a TRIAC, is connected in series relationship between the outlet contact and the hot power line. Sensors in the receptacle outputs signals to a processor having an output coupled to the control terminal of the controlled switch. The processor outputs an activation signal or a deactivation signal to the controlled switch in response to received sensor signals that are indicative of conditions relative to the first and second contacts.

System and method for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer. For example, the system for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer includes: a first current controller configured to receive a rectified voltage generated by a rectifier that directly receives an AC input voltage without through any TRIAC dimmer; and a second current controller configured to: control a light emitting diode current flowing through one or more light emitting diodes that receive the rectified voltage not clipped by any TRIAC dimmer; and generate a sensing voltage based at least in part upon the light emitting diode current, the sensing voltage representing the light emitting diode current in magnitude.

A method for controlling a triode for alternating current (TRIAC), applied to a device, is provided. A voltage is connected to an anode of the TRIAC, and a scaled down voltage is fed into an analog-to-digital converter (ADC) pin of the device. The method includes (1) tracking the voltage at the anode of the TRIAC; (2) applying a trigger pulse to a gate of the TRIAC for a preset time based on the voltage at the anode of the TRIAC reaching a threshold; and (3) detecting whether there is a dip that corresponds to the preset time in the scaled down voltage at the ADC pin of the device. The method further includes, in response to not detecting a dip corresponding to the preset time in the scaled down voltage at the ADC pin, (4) waiting an amount of time; and (5) repeating the steps (1)-(3).

A lighting circuit and a control method thereof are provided. The lighting circuit includes a triac dimmer connected between an alternating current (AC) input power supply and a rectifier circuit, where the rectifier circuit is configured to output a bus voltage after phase cutting, and further includes a turn-on angle detection circuit configured to detect a turn-on state of the triac dimmer and output a first detection signal that represents a relationship between a turn-on angle of the triac dimmer and a first angle, and a bleeder circuit connected to the rectifier circuit and configured to control turn-off time of the bleeder circuit based on the first detection signal and a sampling signal representing a current of a light-emitting diode (LED) load.

The present invention relates to a PTC chip assembly assembly device and method for a pin-plug starting thermal protector, belonging to the field of starting thermal protectors. The present invention comprises a thermal protector, a cover plate, a first pin, a connecting insert, a duplex insert, a second pin, a bidirectional thyristor (TRIAC), a third reed, a second thermistor (TCR), a fourth reed, a base, and a PTC chip assembly. The PTC chip assembly comprises the second pin, the first pin, the first thermistor (TCR), a first reed, and a second reed. The thermal protector is mounted on the base, the first pin is connected to the connecting insert, the second pin is connected to the first pin, the first pin is connected to the duplex insert, the second reed, the second pin, the third reed, and the fourth reed are all connected to the bidirectional thyristor, the third reed and the fourth reed are respectively connected to the two poles of the second thermistor, and the first pin, the first reed, and the second reed are respectively connected to the two poles of the first thermistor.

This invention provides a triac-controlled LED driver control circuit, relating to the field of circuit technology. The circuit includes a circuit board with a microcontroller mounted on its top surface. One end of the microcontroller is electrically connected to a resistor dimmer via a power line, another end is electrically connected to a rectifier via a power line, and yet another end is electrically connected to an optocoupler via a power line. Several sets of resistive elements are arranged on the surface of the circuit board. In use, this invention enables dimming via three input signals: triac dimming, 0 / 1~10V dimming, and resistor dimmer dimming. These three dimming input signal voltage changes are converted into an output PWM signal pulse width by the microcontroller to control the turn-on time of the low-voltage MOS transistor Q3. The dimming process does not affect the normal operation of the driver power supply system, thus avoiding issues with flickering and dimming depth.

Electronic components, more particularly triacs, are provided. An example triac is formed inside and on top of a semiconductor substrate. The triac comprising: on the side of a first surface of the substrate, a first doped region of a first conductivity type and connected to a first conduction terminal; on the side of a second surface of the substrate opposite to the first surface, a second doped region of the first conductivity type and connected to a second conduction terminal; and a gate region connected to a control terminal. The first and second regions respectively have first and second parallel lateral surfaces. Between the first and second parallel lateral surfaces is a separation region not covered by the first and second regions, the separation region shaped as a strip extending along a first direction inside of the gate region and exhibiting an inflection outside of the gate region.

A thermal immersion circulator may include a heater comprising a hollow cylindrical body having an inlet opening at a first end thereof and an outlet opening in a sidewall thereof. The heater may include a flexible circuit board having a plurality of resistive strips controlled by control electronics, such as a TRIAC, which may be water-cooled. A thermal immersion circulator including the heater may be used in a scientific laboratory or for sous vide cooking of food.

In an aspect, data representative of an electrical value is received and a target value for an inductive load based on the electrical value is accessed from memory of the controller. A target value for an inductive load can be accessed based on the electrical value. A transfer function based algorithm can be implemented for determining a set point value using the electrical value the set point value can be applied on a triode for alternating current (TRIAC). Operation of the inductive load to the target power responsive to the applying of the set point value on the TRIAC can be adjusted. The operation of the inductive load at the target power causes operation of the inductive load at the target value.

AED patient protection circuitry is improved by using triode for alternating current (TRIACs), which are significantly smaller and cheaper than relays. The TRIACs are positioned between a defibrillation waveform generator and the pads through which defibrillation waveforms are delivered to the patient and alternate under the control of a processing element such as a microcontroller between a conductive state in which they allow the defibrillation waveforms to reach the patient through the pads and an isolated state in which they prevent the defibrillation waveforms from reaching the patient through the pads. A voltage monitor interfaced to the microcontroller can monitor current leakage from the TRIACs or other portions of the defibrillator, thus detecting degradation of patient protection circuitry and further increasing defibrillator safety and reliability.

To provide a device that, even when switching a heating element supplying power by using a contact switch, prevents radiation of electromagnetic noise due to arc discharge during the operation of a contact switch, and prevents the occurrence of shortening of its life due to contact wear.SOLUTION: A heating device comprises: a substrate 54a; a heating element 54b1; heating elements 54b2, 54b3; a first triac 56a for turning on / off the supply of power to the heating element 54b1; a triac 56b for turning on / off the supply of power to the heating element 54b2 or the heating element 54b3; and an electromagnetic relay 57c having a contact 57c1 connected to one ends of the heating element 54b2 and heating element 54b3, a contact 57c3 connected to the other end of the heating element 54b2, and a contact 57c2 connected to the other end of the heating element 54b3, connects the contact 57c1 and the contact 57c3 to each other when supplying power to the heating element 54b2, and connects the contact 57c1 and the contact 57c2 to each other when supplying power to the heating element 54b3.SELECTED DRAWING: Figure 6

The present application provides a diode-triggered triac device and circuit. The device includes: a P-type substrate; a first P-well formed within the P-type substrate, with a first P-type doped region and a first N-type doped region formed within the first P-well; a second P-well formed within the P-type substrate, with a third N-type doped region and a fourth P-type doped region formed within the second P-well; an N-well formed within the P-type substrate, with a second P-type doped region, a second N-type doped region, and a third P-type doped region formed within the N-well; the second N-type doped region is electrically connected to the positive electrode of the diode string, and the first P-type doped region and the fourth P-type doped region are electrically connected to the negative electrode of the diode string. The present application realizes adjustable bidirectional trigger voltage and saves layout area by commonly connecting diodes.

According to the switch with the energy storage function, the first end of the switch is connected with a zero line through an electric appliance, and the second end of the switch is connected with a live line; a first end of a working loop of the first relay is connected with a live wire; the second end of the working loop of the first relay is connected with an electric appliance through an electricity taking circuit; a control loop of the first relay is connected with a first output pin of the micro-control unit; the output end of the energy storage circuit is connected with a power supply pin of the micro-control unit; the energy storage circuit can supply power to the micro-control unit; the power taking circuit comprises a bidirectional silicon controlled rectifier; the anode of the bidirectional thyristor is connected with the second end of the working loop of the first relay; the cathode of the bidirectional silicon controlled rectifier is connected with an electric appliance; a control electrode of the bidirectional silicon controlled rectifier is connected with a second output pin of the micro-control unit through the electricity taking control module; and the micro-control unit can control the conduction of the bidirectional silicon controlled rectifier through the power taking control module and control the conduction of the working loop of the first relay through the control loop. And the safety can be improved.

System and method for controlling one or more light emitting diodes. For example, the system includes: a voltage detector configured to receive a rectified voltage associated with a TRIAC dimmer and generated by a rectifying bridge and generate a first sensing signal representing the rectified voltage; a distortion detector configured to receive the first sensing signal, determine whether the rectified voltage is distorted or not based at least in part on the first sensing signal, and generate a distortion detection signal indicating whether the rectified voltage is distorted or not; and a phase detector configured to receive the first sensing signal and generate a phase detection signal indicating a detected phase range within which the TRIAC dimmer is in a conduction state based at least in part on the first sensing signal.

Electronic component The present description relates to a triac (400) formed in and on a semiconductor substrate (101), the triac comprising: – on the side of a first face (101T) of the substrate, a first region (105) doped with a first conductivity type and connected to a first conduction terminal of the triac; – on the side of a second face (101B) of the substrate opposite the first face, a second region (111) doped with the first conductivity type and connected to a second conduction terminal of the triac;and – a trigger region (121) connected to a control terminal of the triac, wherein the first and second regions have respectively first and second parallel side faces (105I, 111I), the triac comprising, between the first and second parallel side faces, a separation region (301) not covered by the first and second regions, the separation region having the shape of a strip extending along a first direction inside the trigger region and having an inflection (401) outside the trigger region. Figure for abstract: Fig. 4;

Method for controlling a thyristor or triac (1), wherein the thyristor or triac (1) is triggered by a control circuit (4) by means of a gate current pulse (IP1) after a voltage zero crossing (tN0) of an alternating voltage source (3), comprising: a setting phase (P10) in which the control circuit (4) determines (S120 - S125) a firing pulse duration (TL) of the gate current pulse (IP1) for firing the thyristor or triac (1) so that the current (IR) through the thyristor or triac (1) reaches at least a latching current value (IL) after the end of the gate current pulse (IP1); and an operating phase (P20) in which the control circuit (4) controls the thyristor or triac (1) after a zero voltage crossing (tN0) of the alternating voltage source (3) with a gate current pulse (IP1) with the determined firing pulse duration (TL) (S222, S224) and then monitors a current flow through the thyristor or triac (1) (S241, S242, S246, S247); wherein the control circuit (4) in the setting phase (P10) further determines (S140 - S144) a holding pulse duration (TH) for a further gate current pulse (IP2) before a voltage zero crossing (tN0) of the AC voltage source (3), so that the current (IR) through the thyristor or triac (1) does not fall below a holding current value (IH) before the start of the further gate current pulse (IP2).

The present invention provides an emergency detection circuit and apparatus compatible with a triac dimmer. In the emergency detection circuit, a boost module, a grid status detection and control module, a boost freewheeling circuit connected to an AC neutral line, an emergency battery, an emergency light module, a rectifier circuit, and a triac dimmer connected to an AC live line are electrically connected. When detecting an abnormal AC voltage, the grid status detection and control module controls the boost module to provide a boost voltage in an intermittent periodic manner to ensure normal operation of a triac switch and conduction of the boost freewheeling circuit. The grid status detection and control module samples a voltage signal via the boost voltage sampling terminal and determines, based on a sampled voltage, whether to control the emergency light module to enter an emergency lighting mode. This achieves a technical solution for controlling an emergency light compatible with a triac dimmer.

This invention belongs to, but is not limited to, the field of thyristor technology, and discloses a mesa thyristor structure for improving IGT consistency. It includes a glass tank terminal, a cathode, and a gate, with no adjacent gate region. The glass tank terminal ensures high voltage for the device. The cathode is the current outflow terminal. The gate receives a trigger current, which flows from the gate to the cathode region, controlling the thyristor's conduction. This invention reduces the distance between the cathode region and the glass tank to zero, eliminating the boron-expanded region, which no longer affects IGT parameters, resulting in minimal IGT differences between the wafer edge and central regions. During mesa etching, the width of the glass tank does not affect IGT parameters, making the requirements for mesa etching less stringent and suitable for mass production.

A rectifying bridge includes a bypass circuit with a resistor and a thyristor connected in parallel between a second internal node and a second output node. The bypass circuit limits inrush current during charging of a capacitor connected between the first and second output nodes and switches the thyristor to an “on” state after the capacitor reaches a predetermined charge level to prevent overheating of the resistor. The rectifying bridge further includes first and second branches connected in parallel between a first internal node and the second internal node, each branch including a pair of diodes configured to rectify an input AC voltage. A control device, having a triac and a diode series-connected between the triac and the thyristor, delivers a control signal to the thyristor to enable switching. The control device operates independently of input voltage polarity and can be implemented as part of an integrated circuit.

The present application belongs to the technical field of power electronics. Disclosed are a TRIAC overvoltage protection circuit and a solid-state circuit breaker. The overvoltage protection circuit comprises a TRIAC, a drive circuit of the TRIAC, and a piezoresistor, wherein the drive circuit comprises a drive resistor and a drive capacitor, the drive resistor and the drive capacitor are connected in series, one end of the drive capacitor is connected to a gate electrode of the TRIAC, another end of the drive resistor is connected to the piezoresistor, and another end of the piezoresistor is connected to a first power end of the TRIAC. The present solution can achieve low costs and a small volume of a solid-state circuit breaker, and can reduce the difference between a clamping voltage and a bus voltage.

The present invention relates to a method for preparing a bidirectional thyristor (TRIAC) device and the TRIAC device, and relates to the field of semiconductor technology. The device comprises: a semiconductor material of a first conductivity type, a field oxide layer, a first well region, a second well region, a third well region, and a fourth well region of a second conductivity type, sidewall structures formed on both sides of each field oxide layer, first to third heavily doped implant regions of the first conductivity type, a dielectric layer, contact holes, photolithography of a fourth heavily doped region and a fifth heavily doped region of the second conductivity type, and metal wiring. The present invention utilizes a self-aligned process (or semi-self-aligned process) to improve the precision tolerance of the TRIAC device for FAB silicon wafer equipment, reduce equipment capacity requirements, and reduce certain layers, thereby achieving a lower trigger voltage and the same device parameters, while simultaneously optimizing the difficulty and cost of the production process.

The present application discloses a control board (1) suitable for use in at least one range hood and providing both a user command receiving function and a power control function in an integrated manner, the control board (1) comprising at least one integrated circuit (2); at least one switch mode power source (3) located in the integrated circuit (2) for converting alternating current to direct current; at least one command receiving element (5) located in the integrated circuit (2) for receiving at least one user command; and at least one triac (4) in the integrated circuit (2) that performs a switching function for controlling the operation of at least one element of the range hood in accordance with a user command received by the command receiving element (5).

The invention relates to a pin insertion type starting thermal protector and PTC chip assembly assembling equipment and method thereof, and belongs to the field of starting thermal protectors. The PTC temperature controller comprises a thermal protector, a cover plate, a first pin, a connecting insert, a duplex insert, a second pin, a bidirectional silicon controlled rectifier, a third reed, a second thermistor, a fourth reed, a base and a PTC chip assembly, the PTC chip assembly comprises a second pin, a first pin, a first thermistor, a first reed and a second reed, the thermal protector is mounted on the base, and the PTC chip assembly is mounted on the cover plate. The first contact pin is connected with the connecting insert, the second contact pin is connected with the first pin, the first pin is connected with the duplex insert, the second reed, the second pin, the third reed and the fourth reed are all connected with the bidirectional silicon controlled rectifier, the third reed and the fourth reed are respectively connected with two poles of the second thermistor, and the second thermistor is connected with the second reed. And the first pin, the first reed and the second reed are respectively connected with two poles of the first thermistor.

Disclosed are exemplary embodiments of systems and methods for controlling inducer motor speed. In an exemplary embodiment, a method includes changing stator voltage of an inducer motor (e.g., by changing a firing angle of a triac, using a transistor, a silicon controlled rectifier or semiconductor controlled rectifier (SCR), other switching device, etc.); determining actual inducer motor speed (e.g., by using a hall effect sensor or other speed sensor, etc.); and after determining the actual inducer motor speed, changing the motor stator voltage (e.g., by changing the firing angle of the triac, etc.) to a value at which the actual inducer motor speed is controllably regulated and / or maintained substantially at a set speed.

The utility model relates to the technical field of dimming and color temperature switching, in particular to an IC chip compatible with silicon controlled dimming and color temperature switching and a multi-color-temperature switching circuit. A timer module, a first analog-to-digital conversion module, a second analog-to-digital conversion module, a third analog-to-digital conversion module, a fourth analog-to-digital conversion module, a processing module, a reference generation module, a current setting pin, a first color temperature state setting pin, a second color temperature state setting pin and a third color temperature state setting pin are arranged. The power failure detection pin, the first LED current output pin, the second LED current output pin, the electrolytic capacitor cathode pin and the electrolytic capacitor charging and discharging pin cooperate with each other to realize the dimming and multi-color-temperature switching functions.