396 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.

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 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 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.

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 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 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 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 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.

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.

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.

The invention provides a power supply system. The power supply system comprises a direct current bus, an AC-DC conversion circuit, a load circuit, an energy storage unit and a partial power conversion circuit, the AC-DC conversion circuit converts an AC voltage into a DC bus voltage. When the energy storage unit discharges to the direct current bus, the partial power conversion circuit directly transmits a first part of the electric energy provided by the energy storage unit to the direct current bus, converts a second part of the electric energy provided by the energy storage unit and transmits the converted second part to the direct current bus. When the energy storage unit is charged by the direct-current bus, the partial power conversion circuit directly transmits a first part of electric energy provided by the direct-current bus to the energy storage unit, converts a second part of the electric energy provided by the direct-current bus and transmits the converted second part to the energy storage unit. Therefore, the voltage of the direct-current bus is kept stable.

The application discloses a positive and negative voltage source driving circuit, which is used for providing stable and accurate positive and negative voltage for a load circuit, saving chip area and energy consumption during work. The circuit comprises a band gap reference circuit, which is used for providing a positive reference voltage +VREF and working between a positive voltage VSP and a ground potential GND; a reference voltage generating circuit, which is used for receiving the positive reference voltage +VREF and outputting a positive voltage reference VREF_VGMP to a positive voltage operational amplifier and a negative voltage reference VREF_VGMN to a negative voltage operational amplifier; and the positive voltage operational amplifier and the negative voltage operational amplifier, which are used for outputting a positive voltage and a negative voltage to the load circuit respectively.

The invention provides a multi-channel power supply system in a self-sustaining energy type underwater closed cabin. The multi-channel power supply system comprises a self-sustaining battery, a power supply control board, an integrated communication circuit, a multi-channel output load circuit, a power supply system external trigger on-off controller and a power supply system external communication interface, the self-sustaining battery is connected with the power supply control board through the onboard rectangular connector; the power supply control board comprises an input connector, a filter circuit, an integrated circuit wall-attached heat conduction shell and an output interface; the integrated communication circuit is arranged on the power supply control board, is connected with an external communication interface of a power supply system and is used for receiving an external trigger instruction and sending internal state information; the power supply system external trigger on-off controller is connected with the integrated communication circuit so as to control on-off of the power supply system based on an external trigger signal; the multi-channel output load circuit comprises a plurality of output channels, each output channel comprises a relay, and the relays are connected with the integrated communication circuit so as to control output on-off based on the internal state information and the external state information.

Certain aspects provide a circuit for frequency translation. The circuit includes first mixer circuitry coupled to a load circuit and having a first mixer configured to generate, based on a first differential input signal and a second differential input signal, a first portion of a frequency translated differential signal to be provided to the load circuit, and a second mixer configured to generate, based on a third differential input signal and a fourth differential input signal, a second portion of the frequency translated differential signal. The circuit also includes second mixer circuitry coupled to another load circuit and having a third mixer configured to generate, based on the first differential input signal and the fourth differential input signal, a first portion of another frequency translated differential signal, and a fourth mixer configured to generate, based on the third differential input signal and the second differential input signal, a second portion of the another frequency translated differential signal.

The application discloses a model training process-oriented computing power chip hardware Trojan design method, and relates to the field of integrated circuit security.The method is designed in view of the computing architecture of a GPU, and contains a flip-flop, a finite state machine and a load circuit.The flip-flop identifies the typical characteristics of deep learning training by monitoring the arithmetic instruction intensity and the Warp concurrent activity of the GPU runtime; when the characteristics meet a preset threshold, the finite state machine is triggered, so that the hardware Trojan enters an activated state.The load circuit has two types of designs: the first type is a gradient flipping circuit which interferes with the gradient update direction by modifying the sign bit output by a floating point calculation unit, so that the model cannot converge; the second type is a redundant calculation circuit which consumes computing resources by inserting invalid floating point operations, thereby prolonging the training time.The application designs and triggers the hardware Trojan by utilizing the architecture characteristics of the GPU, has high concealment, and can effectively destroy the accuracy and efficiency of a deep learning training task.

The utility model relates to a reed switch normally-closed relay with a permanent magnet. The reed switch normally-closed relay comprises a reed switch, a framework, a load terminal, an enameled wire, a winding pin and a coil terminal, a permanent magnet is also included; the reed switch and the permanent magnet are both mounted on the framework; the permanent magnets are close to the reed switch, or the permanent magnets are arranged at the two ends or the periphery of the reed switch to provide a constant magnetic field; the reed switch is connected with one end of the load terminal and controls on-off of a load circuit. The other end of the load terminal is connected with an external load circuit; the enameled wire is wound on the coil framework, a magnetic field is generated when the enameled wire is electrified, the two ends of the enameled wire are connected with the winding pins, and the winding pins fix pins of the enameled wire; the winding pin is connected with the enameled wire and one end of the coil terminal; the other end of the coil terminal is connected with an external control circuit and generates a magnetic field when electrified. Compared with the prior art, the utility model has the advantages of effectively and stably realizing the long-term closing function of the reed switch relay reed, long service life, low energy consumption and the like.

The present disclosure is directed to a hydronic system (1) for transferring thermal energy from a heat pump (3) to at least one thermal energy load (5), wherein the hydronic system (1) comprises: - a heat pump feed circuit section (7) for transporting a heat pump flow (qH) downstream of a heat pump circuit pump (11) for driving the heat pump flow (qH) through a heat pump (3); - a load feed circuit section (13) for transporting a load flow (qL) towards at least one thermal energy load (5); - a storage feed circuit section (19) for transporting a storage flow (qS) that goes through a thermal energy storage tank (23), wherein the storage flow (qS) is selectively directable in a charging direction in an operation mode of the hydronic system (1) in which the thermal energy storage tank (23) is charged with thermal energy and in a discharging direction in another operation mode of the hydronic system (1) in which thermal energy is discharged from the thermal energy storage tank (23), wherein the heat pump feed circuit section (7), the load feed circuit section (13) and the storage feed circuit section (19) are connected at a feed connection point (27); - a load flow feed temperature sensor (79) being arranged at the load feed circuit section (13) downstream of the feed connection point (27) for determining a load flow feed temperature (TL) of the load flow (qL); - a load circuit pump (17) for driving the load flow (qL); and - control electronics (20), wherein the control electronics (20) is configured, depending on the operation mode of the hydronic system (1), to control directly or indirectly a speed of the load circuit pump (17) and a speed of the heat pump circuit pump (11) so that a deviation of the load flow feed temperature (TL) from a reference load flow feed temperature is minimised.

The utility model relates to the technical field of electrical equipment, in particular to a bistable switch assembly for a vehicle, which has good conductive performance and a stable working state, depends on the combination of a permanent magnet and an electromagnetic principle, and when an electromagnetic coil is electrified, generated magnetic force drives an armature to move, so that a contact is closed / separated, a load circuit is connected / disconnected, and the bistable switch assembly for the vehicle is realized. Even if the coil is powered off, due to the attraction effect of the permanent magnet, the contact can still be kept in a closed / separated state, the characteristics of low power consumption and low temperature rise of the coil are achieved, the upper shell is fixed through the first nut and the second nut, good electrical connection is achieved through the first conductive gasket and the second conductive gasket, the conductive efficiency of the switch is effectively improved, and the service life of the switch is prolonged. The design of the contact pins on the side surface of the upper shell is convenient for connection with other electrical components, so that smooth and stable work of a circuit is ensured, and reliable switching and control of functions such as starting, stopping or working state switching are realized.

The application provides a charging and discharging balanced topology structure circuit, which comprises an input and output unit, a plurality of energy storage ports, an inductive element and a plurality of switch tubes. The input and output unit comprises a first port and a second port, which are used for being electrically connected with an external power supply or an external load circuit. The first port and the second port are used for being configured as 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 delivered by the first port or the second port and outputting the power supply to the first port or the second port. The inductive element is used for transferring the power supply delivered by the first port or the second port to the energy storage port. The plurality of switch tubes are used for selectively connecting the inductive element between the first port, the second port and the plurality of energy storage ports to form a power transmission loop under different conduction combinations, so as to realize the charging and discharging balance of the plurality of energy storage ports. The application can effectively solve the safety and ensure the balance efficiency, and improve the flexibility.

The application discloses a kind of lithium battery panel parallel charging and discharging equalization implementation circuit, it is suitable for equipping the lithium battery panel of boost-buck charging circuit, automatic power-off after charging is completed, battery capacity equalization and so on, including parallel current limiting module, microcontroller, parallel switch module, output protection module.Parallel current limiting module input end connects lithium battery panel output end, output end connects output protection module input end.Microcontroller input end connects parallel current limiting module output end, lithium battery panel output end, parallel switch module charging port, output end connects parallel switch module control end.Parallel switch module input end connects parallel current limiting module output end, control end connects microcontroller output end, output end connects lithium battery panel charging end.Output protection module input end connects parallel current limiting module output end, output end connects load.Circuit is integrated on a piece of printed circuit board, provides the interface connected with lithium battery panel, need not change the topology of original lithium battery panel, it is convenient to use.

The utility model discloses a secondary overlapped multi-group series rectification output circuit of a switching power supply. The secondary overlapped multi-group series rectification output circuit comprises a transformer and at least three series rectification circuits electrically connected with the transformer, each rectification circuit comprises a rectification diode, an RC absorption circuit, a capacitor filter circuit and a dummy load circuit; the transformer is provided with at least three secondary windings; the corresponding end of the rectifier diode is electrically connected with the corresponding ends of the secondary winding of the transformer, the RC absorption circuit, the capacitor filter circuit and the dummy load circuit respectively; wherein the rectifier diode is used for converting alternating current on the secondary winding side of the transformer into direct current; the RC absorption circuit is used for absorbing a backward voltage peak of the rectifier diode; the capacitor filter circuit is used for smoothing the output voltage; and the dummy load circuit is used for stabilizing the output voltage under a low load condition. According to the utility model, the problems of high withstand voltage and EMC of the rectifier diode are effectively solved.

An antenna impedance matching design circuit includes a load circuit, a filter circuit and a matching circuit which are connected to each other. The load circuit is connected to one end of the filter circuit for connecting a near field communication chip, and the matching circuit includes a plurality of capacitors.

A vehicle control unit power supply management circuit conforming to functional safety is characterized in that a power supply input circuit module comprises a primary power supply circuit for receiving a vehicle input power supply; the power supply management circuit module is composed of a system basic power supply module, a first power supply conversion module and a second power supply conversion module, and is responsible for converting an input power supply into stable voltage required by each functional circuit or load of the vehicle control unit; the power supply load circuit module comprises an analog circuit, a digital circuit, a microcontroller, a communication circuit and an external sensor load which are arranged in the vehicle control unit, and the circuits are connected with the power supply management circuit module to receive required stable voltage, receive monitoring signals and output system basic power supply control signals and watchdog feeding signals. The invention has the characteristics of function safety, wide power supply voltage input, full localization of chips, full vehicle specifications, adaptation to a localization microprocessor, obvious reduction of heating of the microcontroller and the like.

The utility model relates to an anti-short-circuit protection circuit, and belongs to the technical field of electronic circuits. Comprising a load circuit; a first port of the switch assembly is connected with the other end of the load circuit, and a second port of the switch assembly is connected with the negative electrode of the power supply; a first port of the control chip is connected with a third port of the switch assembly and transmits a control signal to the switch assembly; and the detection module is electrically connected with the load circuit. The detection module is directly and electrically connected with the load circuit, abnormal fluctuation of load current or voltage is monitored in real time, and circuit faults are fed back in time.

Certain aspects of the present disclosure generally relate to electronic circuits and, more particularly, to digital-to-analog converters (DACs). One example apparatus for digital-to-analog conversion generally includes: a first multiplexer comprising a first input coupled to a first data input of the apparatus and a second input coupled to a second data input of the apparatus; a first DAC having an input coupled to an output of the first multiplexer; and a first set of switches coupled between an output of the first DAC and a respective one of a first set of load circuits.