124 results about "TRIAC" patented technology

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 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.

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.

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.

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.

Disclosed are systems and methods that provide a novel thermostat system, which involves a hybrid line volt two-way thermostat configured with triode for alternating current (TRIAC) and relay components. The configuration and operational benefits of each thermostat type can be leveraged by the disclosed hybrid thermostat, which can provide a silent, efficiently operated thermostat system. Such system provides a resource efficient heating, ventilation and cooling control system that can reduce power consumption and thereby reduce costs, while maintaining a streamlined, operationally accurate framework for monitoring and managing the climate of a location (e.g., building, home, office, and the like).

A control device includes a triac and a first diode that is series-connected between the triac and a first terminal of the device that is configured to be connected to a cathode gate of a thyristor. A second terminal of the control device is configured to be connected to an anode of the thyristor. The triac has a gate connected to a third terminal of the device that is configured to receive a control signal. The thyristor is a component part of one or more of a rectifying bridge circuit, an in-rush current limiting circuit or a solid-state relay circuit.

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.

The invention provides a symmetric bidirectional silicon controlled rectifier electrostatic protection device with low trigger voltage and high failure current and a manufacturing method thereof. The symmetric bidirectional silicon controlled rectifier electrostatic protection device comprises a P-type substrate, an N-type deep trap, an N-type trap, a P-type trap and the like, a first N well and a second P + injection region, the first N well and a third P + injection region, and a cross gate directly connected with a cathode and an anode through highly doped P + injection jointly determine the trigger voltage of the device, and the cross gate generates a downward electric field to attract electrons in the N wells to a breakdown surface of the cross gate, so that the concentration of one side of the breakdown surface is increased, and the trigger voltage is reduced; the first P + injection region, the first N + injection region and the second grid electrode are connected together to serve as an anode of the device; the first grid electrode, the third N + injection region and the fourth P + injection region are connected together to serve as a cathode of the device; the device effectively protects a chip I / O signal port for transmitting positive and negative levels under the condition that the trigger voltage of the device is reduced. The device has the characteristics of low trigger voltage and high failure current, and can be applied to bidirectional ESD protection of an I / O port.

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.

The invention provides a bidirectional silicon controlled rectifier electrostatic protection device and a preparation method thereof. The bidirectional silicon controlled rectifier electrostatic protection device comprises a P-type substrate, an N-type buried layer and a P-type epitaxial layer which are stacked from bottom to top, and a device structure formed in the P-type epitaxial layer; the device structure comprises a first P-type buried layer, a second P-type buried layer, and a first P-type well, a first N-type well, a second P-type well, a second N-type well and a third P-type well which are formed on the first P-type buried layer and the second P-type buried layer, the first P + injection region, the first N + injection region, the second P + injection region, the third P + injection region, the fourth P + injection region, the second N + injection region, the fifth P + injection region, the sixth P + injection region, the seventh P + injection region, the third N + injection region and the eighth P + injection region are formed in the wells, and the first grid electrode and the second grid electrode are formed on part of the P-type epitaxial layer. According to the invention, the problems of high trigger voltage and low maintaining voltage of the existing silicon controlled rectifier device applied to the 5V window are solved.

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.

The utility model discloses a novel dual-channel input control optocoupler device, which relates to the technical field of electronics and comprises a light emitting diode LED1, a light emitting diode LED2, a bidirectional silicon controlled rectifier TRIAC1 and a bidirectional silicon controlled rectifier TRIAC2. The light emitting diode LED1 is connected with the light emitting diode LED2 in series, the bidirectional silicon controlled rectifier TRIAC1 is connected with the bidirectional silicon controlled rectifier TRIAC2 in series, when the light emitting diode LED1 is connected with the light emitting diode LED2 in series, combined state input is generated, and the combined state input comprises a first input mode, a second input mode and a third input mode; the first input mode is composed of a first pin and a second pin, the second input mode is composed of a second pin and a third pin, and the third input mode is composed of a first pin and a third pin. The optical coupler is simple in structure and reasonable in design, effectively avoids the problem of series failure caused by inconsistent trigger current, and remarkably improves the withstand voltage upper limit of the optical coupler.

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.

The utility model relates to a power-adjustable bath heater protection circuit, a power supply input end is provided with a trip coil, a control electrode of a silicon controlled rectifier SCR1 is connected with an electric leakage protection module, and a live wire passes through a zero sequence mutual inductor of the electric leakage protection module and is connected to a bath heater heating lamp. A zero line penetrates through a zero sequence mutual inductor of the electric leakage protection module and is connected to the adjusting module, the adjusting module comprises a power adjusting point locator, a thermistor and a bidirectional silicon controlled rectifier, and a fixed contact at one end of the power adjusting potentiometer is sequentially connected with the thermistor and the other end of the bath heater heating lamp. A fixed contact at the other end of the power regulation potentiometer is connected to the null line through a capacitor C4, a sliding contact of the power regulation potentiometer is connected with a control electrode of the bidirectional silicon controlled rectifier, and a first anode and a second anode of the bidirectional silicon controlled rectifier are connected with the null line and the other end of the bath heater heating bulb respectively; an existing bath heater protection module is simplified, and electric leakage circuit protection of the bath heater heating lamp can be achieved through simple electronic devices.

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.

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.

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.

The invention provides a coupler control system and method, a terminal and a storage medium, relates to the technical field of communication, and is applied to a communication line, the communication line comprises a coupler module to be controlled, and the system comprises: the coupler module has an input end; the acquisition module is used for acquiring the input current of the coupler module; the control module is used for calculating the change rate of the input current according to the input current of the coupler module acquired by the acquisition module; the energy storage module is connected with the input end of the coupler module through the bidirectional silicon controlled rectifier. The control module is connected with the bidirectional silicon controlled rectifier. The control module is also used for comparing the acquired input current of the coupler module with a preset first current threshold value and a preset second current threshold value; and controlling the conduction direction of the bidirectional silicon controlled rectifier according to the comparison result, and controlling the size of the conduction angle according to the calculated change rate of the input current. According to the invention, the charging current and the discharging current can be dynamically adjusted along with the change trend of the current in the circuit.

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.

The utility model discloses a TRIAC low-dimming quick start circuit, which comprises an alternating current input circuit, a rectification output circuit, a low-current quick start circuit and a power conversion circuit, and is characterized in that the rectification output circuit is electrically connected with the alternating current input circuit, the low-current quick start circuit and the power conversion circuit respectively; the rectification output circuit comprises a diode D5, an electrolytic capacitor EC1 and an electrolytic capacitor EC2. According to the TRIAC low-dimming quick start circuit disclosed by the utility model, the AC input circuit, the rectification output circuit, the low-current quick start circuit and the power conversion circuit are linked, and a dimming pin of the power management chip IC1 is utilized, so that the charging current of a capacitor is increased during startup, and the charging current of the capacitor is reduced during startup; and after the power supply works normally, the charging function is closed, so that the time for starting to turn on the lamp is provided, and the dimming depth is low enough.