680 results about "Load circuit" patented technology

The invention relates to a simple and reliable touch control switch. The simple and reliable touch control switch consists of a 12-V direct-current power supply, a one-way silicon controlled rectifier 1 (SCR1) trigger circuit, a one-way silicon controlled rectifier 2 (SCR2) trigger circuit, a relay control circuit and a load RL circuit. A conventional mechanical self-locking rocker switch or a toggle switch has the defects that actions are mechanical, operating actions are different because of persons, a contact is easy to jitter, a contact is easy to ablate, abrade and the like. The touch control switch is realized by only using a small number of common components and two touch metal pieces, namely an on-load circuit is switched on by touching a touch electrode once, and an off-load circuit is switched off by touching the touch electrode once. The overall touch control switch is made of discrete components, and strong electricity can be effectively isolated from weak electricity through a relay, so that the power supply of a load can use alternating current and also can use direct current. Therefore, the touch control switch has a certain function in the field of household appliances, industrial automation, and optical, mechanical and electrical integration.

A self-triggering, bidirectional control electronics component for an electronic switch (50), for the detection and rapid shutdown of currents at a selected threshold value for both current flow directions, includes a threshold switch having a plurality of selectable shutdown threshold values for both current flow directions, the threshold switch coupled to a bidirectional current sensor system (65), arranged in the electronic switch, based on sensing of sensors on an input side of the threshold switch; and a high-speed de-energizing circuit (53) on an output side of the threshold switch including a high non-load circuit voltage for rapid removal of current from a magnetic drive coil (45), the high-speed de-energizing circuit being configured to rapidly remove the current from the magnetic drive coil when the bidirectional current sensor system senses a current greater than or equal to the selected threshold value among the plurality of selectable shutdown threshold values.

A DC electronic load circuit relates to the technical field of electronic load control. The utility model provides a direct current electronic load circuit which integrates a dissipation MOS tube array, an analog PID loop, a digital integrated control module, a bus electrical parameter sampling and processing module and a WiFi communication module, and realizes a plurality of working modes such as constant current, constant voltage, constant resistance and constant power by accurately controlling the conduction degree of the MOS tube array. The system has the advantages of real-time monitoring, remote control, overvoltage and overcurrent protection, low power consumption design and the like, and an electronic load solution which is high in precision, high in stability and flexible to operate is provided, so that diversified test requirements are met, and the power supply test efficiency and safety are improved.

The embodiment of the invention provides a circuit protection device and a chip, and the device comprises a detection module which is used for detecting whether the voltage of a power supply exceeds a voltage protection threshold, and outputting a low-level signal to a time hysteresis control module when the voltage exceeds the voltage protection threshold; if not, a high-level signal is output to the time hysteresis control module; the time hysteresis control module is used for receiving the low-level signal output by the detection module and controlling an MOS tube in the time hysteresis control module to be turned off; and the control module is used for receiving the high-level signal output by the detection module, timing and controlling the MOS tube to start when the timing time reaches the preset time, so that the problem that the power supply end fluctuates between a protection mode and a normal working mode when the input power supply rapidly fluctuates in the overvoltage and power failure protection circuit in the related technology is solved. In addition, common simple devices are needed for implementation, the cost is low, and the reliability is high.

The invention relates to the technical field of voice recognition and intelligent household electrical appliance control, in particular to an induction cooker control method based on voice recognition, which comprises the following steps: synchronously acquiring a voice signal and a lip motion signal, and generating multi-modal sensing data through timestamp alignment; performing cross-modal anti-noise processing on the data, and outputting a fusion feature tensor fusing acoustic and visual features; semantic analysis and danger instruction recognition are executed, and a risk filtering control instruction containing temperature / fire parameters is generated; calling a thermodynamic dynamic model to calculate a power control parameter based on the instruction parameter; converting a power parameter into a space vector modulation waveform to drive a load circuit, and synchronously collecting the pot bottom temperature; and triggering an anti-noise process and thermodynamic model parameter updating according to the deviation between the actual temperature and the target temperature. Noise interference is reduced through multi-modal signal cross validation, dangerous instructions are intercepted in combination with knowledge graph constraints, the noise suppression capability and the temperature control precision are continuously optimized, and the safety and reliability of voice control in a complex environment are improved.

The present application discloses a low-cost and high-performance radio-frequency amplifier, comprising an input stage circuit, a common-gate stage circuit, and an output load circuit. The input stage circuit implements conversion from a single-ended signal to a differential signal, implements input impedance matching, and converts an inputted radio-frequency voltage signal into a radio-frequency current signal. The input stage circuit comprises a first three-coil transformer, consisting of a primary coil, a secondary coil, and a third coil. The common-gate stage circuit transmits the radio-frequency current signal outputted by the input stage circuit to the output load circuit, increases the withstand voltage and equivalent output impedance of the circuit, and implements gain control in at least two modes. The output load circuit converts the radio-frequency current signal from the common-gate stage circuit into a radio-frequency voltage signal, implements conversion from a differential signal to a single-ended signal, and outputs an amplified radio-frequency voltage signal. The present application provides a radio-frequency amplifier having a small size, broadband matching, high linearity, a large dynamic range, and low design complexity.

The utility model discloses a dual-power switch power distribution system and a control device and an air conditioner thereof, and the device comprises a main power supply and a standby power supply which are connected to a load side circuit breaker after passing through a dual-power switch system; the standby power supply is also connected to the first connecting end of the bypass system; the second connecting end of the bypass system is connected to a circuit breaker of a second-level load and a common end of the second-level load; under the condition that short-circuit faults occur between the main power supply and the load-side circuit breaker and between the standby power supply and the load-side circuit breaker, the dual-power switch system disconnects the main power supply and the standby power supply, and the bypass system controls the standby power supply to supply power to the second-level load through the circuit breaker of the second-level load. According to the scheme, the bypass system is added to the dual-power switch power distribution system, the bypass system is used for supplying power to the second-level load, namely the important load when the short-circuit fault occurs between the dual-power switch and the load circuit breaker, and the reliability of the dual-power switch power distribution system is improved.

The invention provides a test platform for a power management chip. The test platform comprises an upper computer, a control panel, a load daughter board and an instrument, the control board is configured to receive a test instruction sent by the upper computer, configure the instrument based on the test instruction, send a test signal to the load daughter board, receive a response signal sent by the load daughter board, obtain a test result based on the response signal and send the test result to the upper computer; the load daughter board is configured to bear the tested power management chip, receive the test signal sent by the control board, match the test signal to the tested power management chip, obtain a response signal output by the tested power management chip and send the response signal to the control board; wherein the load daughter board is provided with a load circuit and is configured to provide a peripheral circuit for the tested power management chip, and the control board is further configured to switch the type of the load circuit. Wherein different types of power management chips can be verified by switching the types of the load circuits on the load daughter board.

The invention discloses a power factor correction control circuit and a household electrical appliance, and the circuit comprises a rectification module which is connected to an AC power supply; the first end of the switching device is electrically connected with the first output end of the rectification module through an inductance device, and the second end of the switching device is electrically connected with the second output end of the rectification module through a resistance device; the first end of the load circuit is connected to the first end of the switching device, and the second end of the load circuit is connected to the second end of the switching device; the controller is electrically connected with the control end of the switching device, and is configured to obtain the input voltage of the load circuit and the output current of the rectification module; according to the input voltage and a preset voltage reference value, the step-up rate is obtained through calculation, and the preset voltage reference value is obtained through feedback adjustment according to the step-up rate obtained through calculation and a preset step-up rate reference value; and determining a control signal of the switching device according to the boost rate and the output current. According to the scheme, the control efficiency of the switching device can be improved.

In on example, an apparatus includes: a first power amplifier (PA) to receive a first input radio frequency (RF) signal and output a first amplified RF signal; a second PA to receive a second input RF signal and output a second amplified RF signal; and a transformer circuit coupled to an output of the first PA and an output of the second PA. The transformer circuit is to provide, to a load circuit, an RF output signal comprising the first amplified RF signal and the second amplified RF signal.

The invention relates to a high-stability primary and secondary fusion complete column-mounted circuit breaker, and relates to the technical field of intelligent power grids, the high-stability primary and secondary fusion complete column-mounted circuit breaker comprises a circuit breaker body and a plurality of insulating columns fixedly arranged on the top surface of the circuit breaker body, and two supporting plates which are far away from each other are fixedly arranged on the left and right side edges of the bottom surface of the circuit breaker body in the horizontal direction; a plurality of fixing holes are formed in the supporting plate; the left side surface and the right side surface of the circuit breaker body are rotatably connected with a placing plate located above the supporting plate. The placing plate can be rotated to a vertically downward folding state and a horizontally outward application state, and a positioning assembly is arranged outside the circuit breaker body; according to the invention, the side surface of the circuit breaker body is rotatably provided with the placement plate which can be switched to be folded and applied, and the placement plate is adjusted to be in a horizontal outward application state during maintenance, so that an exclusive temporary tool placement space can be provided for maintenance personnel working high above the ground, a tool bag does not need to be frequently rummaged, and the tool taking time is greatly reduced.

A power supply system is installed in a vehicle having an autonomous driving mode. The power supply system includes a first load circuit connected to a first load that operates using electric power from a main battery; a second load circuit connected to a second load that operates using electric power from the main battery or an additional battery and is necessary for the autonomous driving mode; and a main relay provided on a power supply line for electrically connecting the first load and the second load. The first load circuit is located on an upstream side of the main relay. A branch point on a downstream side of the main relay defines a first path and a second path and allows a current flowing from the branch point to the second load by the first path and to the additional battery by the second path.

The application discloses and realizes a dual-mode multi-load loop arc fault detection system, and aims at the problems of insufficient precision of existing real-time arc fault detection devices and high-load continuous operation of equipment, etc., divides the fault arc into two kinds of starting arc and process arc, and uses different modes of detection methods according to different conditions of starting fault and process fault, adopts a characteristic value partition detection method in the process mode, and makes the method tend to be simple under the condition of ensuring accuracy and real-time performance. The method takes an stm32H7 as a core microprocessor, is matched with a conditioning circuit, a power supply circuit, a data acquisition circuit and a wireless communication circuit to form a dual-mode fault diagnosis system. The application has the characteristics of high monitoring precision and high speed, and has strong popularization value and use value.

The invention relates to an electric leakage suppression system for an alternating-current power system, and the system comprises a variable-frequency compensation control module which adjusts the frequency and signal amplitude in a circuit according to the equipotential characteristics of a power utilization loop of the power system, so as to match the load characteristics and achieve the dynamic fixation of the signal amplitude; the real-time monitoring module is used for monitoring the frequency, current and voltage of the power system; the central processing unit is used for processing data from the monitoring module, executing data analysis and identifying frequency and current changes under the condition of electric leakage or electric shock; and the electric leakage suppression module is connected with the real-time monitoring module, is provided with a mechanism which is automatically activated when frequency and current are detected to be abnormal, and is used for dynamically adjusting circuit response to suppress leakage current. And the modules are connected in parallel to the power utilization loop, perform rapid self-adaptive modified modulation compensation on the parallel frequency resonance of the load loop, and dynamically adjust the current phase and amplitude so as to realize the zero potential difference of the target load end and the current suppression on the target load, and form the suppression and shielding effects on the leakage of the circuit.

The invention relates to the technical field of electronic circuits, and discloses a power supply circuit, a chip and electronic equipment. The output end of the power supply circuit is connected with the input end of a load circuit, and the power supply circuit comprises a control module, a combined switch module and an adjusting module. Wherein the control module is used for outputting a switch control signal to the combined switch module; the combined switch module is used for switching to a corresponding target switch mode according to different switch control signals; and the adjusting module is used for correspondingly adjusting the input voltage of the power supply circuit according to the target switching mode, so that mode switching of boosting the input voltage of the power supply circuit by different multiples can be realized, and the boosting efficiency is improved.

The invention provides a topology circuit of a high-voltage acceleration power supply, a control method and a high-voltage accelerator, and relates to the technical field of power supplies. The topology circuit comprises a PFC circuit, an LLC resonance circuit and a voltage doubling rectifying circuit. The pre-stage PFC circuit rectifies the input alternating current mains supply, suppresses harmonic waves, reduces ripples, and improves the power correction factor of the high-voltage acceleration power supply; the inverter circuit of the intermediate-stage LLC resonant circuit has a soft switching function, high frequency of a power conversion device can be realized, a resonant cavity limits the change rate of voltage and current in the switching process, the switching noise is reduced, and energy is transmitted to a load through a transformer and a voltage doubling rectifying circuit. The PFC circuit and the LLC resonance circuit are simple in structure and control, on the premise that the number of circuit devices is reduced, input voltage and current are in the same phase, the operation efficiency of the circuit is improved, the size of the high-voltage acceleration power supply is effectively reduced, and the power density is improved.

The invention provides a self-adaptive ripple suppression circuit based on an MOSFET, and relates to the technical field of electronic circuits. The circuit comprises an input alternating current end EMC filtering surge protection circuit, a rectification circuit, an absorption protection filtering circuit, a clamping absorption circuit, a detection protection circuit, a control circuit, a power follow current circuit, an output filtering circuit, a stroboflash removing circuit and an LED load circuit which are connected in sequence. Under the condition that the MOSFET self-adaptive ripple suppression circuit is in a working state, voltage at the two ends of the sampling resistor is fed back to a grid electrode and a source electrode of the MOS tube, on-resistance of the MOS tube is adjusted through change of the sampling voltage on the basis of the characteristic that the MOS tube works in a variable resistance area, and output current ripples are dynamically suppressed. The circuit has excellent adaptive capacity, can dynamically suppress output current ripples in a wide load range through a simple simulation negative feedback loop, and is quick in response.

The utility model discloses a surge protection circuit, a power supply circuit and electronic equipment, and the surge protection circuit comprises an energy storage circuit which is used for being coupled with a power supply input circuit and a load circuit so as to receive a power supply input signal provided by the power supply input circuit, and outputting a load power supply signal to the load circuit; the surge suppression circuit is coupled with the energy storage circuit; a bypass tank circuit coupled to the tank circuit and the surge suppression circuit; and the bypass switch circuit is coupled with the energy storage circuit, the surge suppression circuit and the bypass energy storage circuit, and the bypass switch circuit is configured to store energy for the bypass energy storage circuit by using the power input signal when the load power supply signal is lower than a first set threshold value so as to limit the load power supply signal within a second set threshold value. By means of the scheme, the surge protection circuit can effectively restrain the surge current from damaging related circuits, and effectively restrain the surge current from being generated when power input is interrupted for a short time and then recovered, so that it is guaranteed that a load circuit maintains normal work and operation.

The invention provides a charging and discharging balanced topological structure circuit, which comprises an input and output unit, a plurality of energy storage ports, an inductance element and a plurality of switching tubes, and is characterized in that the input and output unit comprises a first port and a second port and is used for being electrically connected with an external power supply or an external load circuit; the first port and the second port are configured to be a power input port or a power output port according to a preset control strategy; the plurality of energy storage ports are used for receiving the power supply transmitted by the first port or the second port and outputting the power supply to the first port or the second port; the inductance element is used for transferring a power supply transmitted by the first port or the second port to the energy storage port; and the plurality of switch tubes are used for selectively connecting the inductance elements among the first port, the second port and the plurality of energy storage ports under different conduction combinations to form a power supply transmission loop, so as to realize charge and discharge balance of the plurality of energy storage ports. According to the method, the safety can be effectively ensured, the balancing efficiency can be ensured, and the flexibility is improved.

The invention discloses a power factor correction control circuit and a household electrical appliance, and the circuit comprises a rectification module which is connected to an AC power supply; the switching device is electrically connected with the rectification module; the first end of the load circuit is connected to the first end of the switching device, and the second end of the load circuit is connected to the second end of the switching device; the controller is electrically connected with the control end of the switching device, and is configured to obtain the input voltage of the load circuit and the output current of the rectification module; according to the input voltage and a preset voltage reference value, a step-up rate is calculated; inputting the input voltage and the voltage reference value into a preset current compensation module, and calculating to obtain a current compensation value; and calculating a control signal of the switching device according to the boost rate, the output current and the current compensation value, so that the switching device executes conduction control according to the control signal. According to the technical scheme, the probability that high voltage generated by overshoot damages a switching device can be reduced.

A smart card may include: an antenna configured to receive at least one radio signal; a load circuit that is connected to both ends of the antenna; a rectifier configured to rectify the at least one radio signal received through the antenna, and provide the rectified signal to an output terminal; and a power generator including a voltage regulator, a first diode, and a second diode, the voltage regulator configured to provide an internal voltage, the first diode and the second diode connected in series between the output terminal of the rectifier and a first node, and the first node is configured to receive the internal voltage during a first mode of the smart card, the first mode being a mode during which a load of the load circuit is modulated.

The utility model discloses an over-temperature and over-current protection circuit and a power adapter system, and the over-temperature and over-current protection circuit comprises an over-current monitoring assembly which is used for outputting a first fault signal lasting for a first preset time when the load voltage of a load circuit is greater than a set voltage. And the temperature control unit is used for outputting a second fault signal when the temperature of the load circuit exceeds the preset temperature threshold. And the first logic unit is electrically connected with the overcurrent monitoring assembly, the temperature control unit and the execution unit, and is used for controlling the execution unit to disconnect the load circuit when receiving the first fault signal and / or the second fault signal. And when the first logic unit receives the first recovery signal and / or the second recovery signal, the execution unit is controlled to close the load circuit again. The over-temperature and over-current protection circuit can prevent the load circuit from being disconnected for a long time in the over-temperature and over-current protection process.

The utility model discloses a contactor static contact, a static contact assembly and a contactor. The contactor static contact comprises a static terminal and a static contact. The static terminal comprises a main body part which is used for being electrically connected to a load circuit so as to bear load current; and the heat dissipation plate is connected with one side of the main body part. And the static contact is arranged on the main body part and is used for electrically contacting with a moving contact of a moving contact of the contactor. The static terminal is an integrated piece, and heat of the static contact of the contactor can be transmitted to the shell of the contactor through the heat dissipation plate and dissipated to the outside through the shell, so that the heat dissipation performance of the contactor can be improved. In addition, the anti-short-circuit current capability of the contactor can be improved. Besides, in some embodiments of the utility model, the top opening of the housing of the contactor is sealed by the sealant poured into the top opening, so that external pollutants can be prevented from entering the housing, and the contact of the contactor is prevented from being polluted by the external pollutants.

Circuits and apparatus for delivering a constant-current pulse with stability compensation into low impedance pyrotechnic loads are disclosed. One apparatus includes a power switch circuit including a high side connectable to an external device and for outputting current to the external device, a current sense circuit connected to the power switch circuit and for monitoring and limiting an amount of the current being output by the power switch circuit, a compensation circuit connected between the current sense circuit and the high side of the power switch circuit. The compensation circuit includes circuitry to provide gain and phase margin over a frequency range that provides stability in the current being output by the power switch circuit over a range of temperatures, input voltages, load impedances, and harness lengths. Systems that include the apparatus and / or perform the operations of the apparatus are also disclosed.

The invention relates to the technical field of switch cabinets, in particular to an intelligent low-voltage switch cabinet which comprises a cabinet body. The execution unit comprises a circuit breaker handcart used for disconnecting the current of the load circuit and a plurality of contactors used for switching the load circuit; the detection unit is used for detecting the instantaneous reduction voltage of the load, the current harmonic phase difference of the phase current signal of the main bus, the current harmonic signal proportion and the environment temperature in the cabinet body; the control unit is used for determining a load protection grade according to the instantaneous reduction voltage of the load, and determining the interval duration of starting the circuit breaker handcart and the contactor in the inrush current impact compensation mode according to the load protection grade and the duration of the instantaneous reduction voltage; the asynchronous action starting mode of the contactors is adjusted according to the harmonic wave phase difference, and the access proportion of the reactive load is adjusted according to the harmonic wave signal proportion and the progressive increase node similarity of the environment temperature in the cabinet body in the time sequence. According to the invention, the load stability is improved.

The utility model relates to the technical field of electronic circuits, in particular to a magnetic clamp control circuit and imaging detection aperture equipment, the magnetic clamp control circuit comprises a power supply circuit unit, a control circuit unit and a load circuit unit, the power supply circuit unit comprises a first switch, a switching power supply and a DC-DC voltage reduction module, the control circuit unit comprises an adjustable potentiometer and a knob switch, and the load circuit unit comprises a magnetic coil. According to the magnetic clamp control circuit of the utility model, through reasonable power supply conversion, voltage regulation and control design, the reliability and economical efficiency of imaging detection aperture equipment are effectively improved.

This invention discloses a dual-output control and detection circuit, including a control circuit, a first detection sampling circuit, a second detection sampling circuit, and a remote matching load circuit. The control circuit includes a drive control module, a first switch module, and a second switch module. The drive control module controls the operation of the first and second switch modules. The first switch module switches between a first control state and a second control state; the second switch module switches between a third control state and a fourth control state. The drive control module receives signals from the first and second detection sampling circuits and controls the operation of the first and second switch modules. This application uses a three-wire output, which can detect open circuit and short circuit faults when the device is not started, ensuring normal operation of the device. It has advantages such as low cost, simple implementation, high reliability, and reduced engineering costs.

The invention relates to an on-board electrical system of a rail vehicle, wherein the on-board electrical system comprises at least one vehicle-wide DC busbar, at least one on-board electrical system battery which is designed to supply the DC busbar, a plurality of distributed electrical loads, a plurality of load circuits which connect the loads to the DC busbar, and a plurality of controlled electronic switching and protection devices which are designed to switch and protect the load circuits, and wherein the on-board electrical system is characterised in that an adaptation device is arranged upstream and / or downstream of at least one of the electronic switching and protection devices, wherein the adaptation device comprises at least one passive electrical component which limits a rate of rise of current.

Circuits and methods for an amplifier (particularly LNAs) that achieve wideband output impedance matching and high gain while simultaneously rejecting out-of-band (OOB) harmonic frequencies. Some embodiments allow multiple modes of operation to allow selection of gain versus linearity characteristics. One aspect of the present invention is improvement of the linearity and sensitivity of a whole RF “front end” (RFFE) receiver chain by suppressing OOB gain within an LNA component at higher order harmonic frequencies. Another aspect of the present invention are new wideband and ultra-wideband LNA load circuits that, while achieving high frequency OOB rejection, maintain in-band high gain and wideband output impedance matching at the same time. Yet another aspect of the present invention are new ultra-wideband LNA output impedance matching circuits.

This application is directed to providing a configurable and scalable load that emulates a dynamic current profile of an electronic system. The load is provided by an electronic device including a control signal interface providing control data, a clock signal interface providing an operating clock signal, a load controller, and a set of load modules. The control data indicate one or more dynamic current characteristics of the load, and are applied by the load controller to generate a plurality of load control signals that are synchronized according to a temporal pattern. Each load module is controlled by a respective load control signal to generate an output signal based on the operating clock signal. The load controller controls the set of load modules to generate respective output signals according to the temporal pattern, allowing the set of load modules to operate jointly to emulate the dynamic current characteristics of the load.