24 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 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.

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.

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.

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.

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

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.

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.

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 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 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.

The application relates to the technical field of motor control, and discloses a kind of automobile drive motor safety state control device and control method, device includes: power supply chip, processor, motor speed acquisition module, switch module, ASC logic module and motor control module;The side of switch module is connected with power supply chip, processor and motor speed acquisition module respectively, and the other side is connected with ASC logic module;ASC logic module is connected with motor control module;Motor speed acquisition module is based on received first safety state control signal and / or second safety state control signal and combines preset reference voltage to switch module and outputs first control signal;Switch module determines the output of triac signal to ASC logic module according to first control signal in first safety state control signal, second safety state control signal and first control signal to make it carry out corresponding safety state control to motor control module according to triac signal, which can significantly reduce development cost and improve control efficiency.

The application discloses a driving circuit, method, lamp and system compatible with silicon controlled rectifier and wireless dimming. The driving circuit comprises: an angle detection module connected with a silicon controlled rectifier dimmer, the angle detection module being used to acquire conduction angle data of the silicon controlled rectifier dimmer; a wireless control module connected with the angle detection module, the wireless control module being used to generate a control signal according to the conduction angle data of the silicon controlled rectifier dimmer and in response to a gesture operation adjustment instruction; and a power supply adjustment module connected with the silicon controlled rectifier dimmer and the wireless control module, the power supply adjustment module being used to acquire a power supply signal transmitted by the silicon controlled rectifier dimmer and generate a driving signal according to the control signal. The technical scheme provided by the embodiment of the application can be compatible with dimming requirements of target users, realize the function of being compatible with silicon controlled rectifier and wireless dimming, improve dimming effect and meet dimming depth requirements of the target users.

The application provides an LED driving circuit and a lamp. The circuit comprises a rectifying module, a constant current driving module, a triac signal extraction module and a wireless communication module; the output ends of the rectifying module are connected with the input ends of the constant current driving module and the input end of the triac signal extraction module; the first signal input end of the wireless communication module is connected with the output end of the triac signal extraction module, the second signal input end is used for receiving the wireless dimming signal input by an external device, and the output end is connected with the control end of the constant current driving module; the wireless communication module is used for generating a target dimming signal based on the wireless dimming signal and the triac signal and sending the target dimming signal to the constant current driving module; the target dimming signal is obtained by the wireless communication module for compatible processing of the phase-cut dimming and the intelligent dimming, and then is sent to the constant current driving module for current control; the phase-cut dimmer and the wireless communication module exist simultaneously, and problems such as flashing light do not occur, the wireless communication module can be directly installed in the power path with the phase-cut dimmer, and the compatibility is good.

A high-frequency conversion step-down circuit is replaced, an LED load is directly driven by power frequency rectification output pulsating voltage, and the LED driver without high-frequency radiation is formed by adopting capacitor step-down, shunting, current limiting, follow current and composite load modes: 1, rectification output is smooth filtering without an electrolytic capacitor, and the service life of the driver depends on an LED lamp bead; 2, a correction circuit is not needed, the alternating current input current angle approaches 360 degrees, the power factor is high, and the harmonic wave is low; 3, the LED load current amplitude is constant, the adjusting process is low in power consumption, and a control circuit does not need to be additionally provided with a low-voltage power supply; 4, PWM cutting control is adopted to replace TRIAC phase control dimming of power frequency AC voltage; 5, a PWM pulse generator, a dimming controller and a PWM power frequency dimming power supply are arranged, and independent and remote group simulation and PWM dimming are achieved.

A power control device includes a heater, a zero-cross detecting unit, a triac, a supplying unit, and a controlling unit. The supplying unit discharges an electric charge when a control signal is outputted in a half-wave of each of a first polarity and a second polarity and charges the electric charge when the control signal is not outputted in the half-wave of the first polarity. The controlling unit outputs: in a first half-wave, a first control signal on the basis of the zero-cross point and a second control signal in a first phase different in timing from the first control signal, and in a second half-wave, a third control signal on the basis of the zero-cross point and a fourth control signal in a second phase different in timing from the second control signal. The first phase and the second phase are different from each other.

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 invention provides a low-PF silicon controlled rectifier dimming circuit and a lighting circuit, AC power supply voltage obtains power supply voltage through a silicon controlled rectifier dimmer and a rectification circuit to supply power to an LED, the low-PF silicon controlled rectifier dimming circuit comprises a diode and an input capacitor, the positive electrode of the diode receives bus voltage, the negative electrode of the diode is connected with the positive electrode of the LED, and the negative electrode of the diode is connected with the input capacitor. A first end of the input capacitor is connected with a common connection end of the diode and the LED, a second end of the input capacitor is grounded, and the input capacitor provides power supply voltage for the LED; a load switch connected in series with the LED; the self-adaptive adjusting circuit is used for acquiring a first voltage representing the voltage of a connection node of the load switch and the LED and generating an adjusting voltage according to the first voltage, and the adjusting voltage is used for controlling the on-off state of the load switch so as to control the current of the LED. According to the invention, the problem that the LED current is unstable when the conduction angle is small and the input capacitor is under-voltage is solved.

A power control device includes a heater, a zero-cross detecting unit, a triac, a supplying unit, and a controlling unit. The supplying unit discharges an electric charge when a control signal is outputted in a half-wave of each of a first polarity and a second polarity and charges the electric charge when the control signal is not outputted in the half-wave of the first polarity. The controlling unit outputs: in a first half-wave, a first control signal on the basis of the zero-cross point and a second control signal in a first phase different in timing from the first control signal, and in a second half-wave, a third control signal on the basis of the zero-cross point and a fourth control signal in a second phase different in timing from the second control signal. The first phase and the second phase are different from each other.

The application provides an LED driving circuit and a lamp. The LED driving circuit comprises a rectifying module, a constant current driving module and a triac signal extraction module; the input end of the rectifying module is connected with the input end of the LED driving circuit, and the output end is connected with the input end of the constant current driving module and the input end of the triac signal extraction module respectively; the first control end of the constant current driving module is connected with the output end of the triac signal extraction module, the second control end is used for inputting a dimming signal, and the output end is connected with the output end of the LED driving circuit; the constant current driving module is used for controlling the output current of the constant current driving module according to the dimming signal and the triac signal. The application controls the constant current by comprehensively using the triac signal and the dimming signal, and is compatible with the triac dimming and intelligent dimming. The application can be directly installed in the power channel with the triac dimmer, and has good compatibility.