18results about How to "Simple circuit structure" patented technology

The embodiment of the invention provides a photovoltaic module control device, and the device comprises at least one bypass module which is used for being connected with at least one photovoltaic module in parallel; the driving circuit is used for driving at least one bypass module to work under the control of the controller; the power supply module is used for obtaining electric energy from the at least one photovoltaic module and outputting the electric energy to the controller under the condition that the at least one photovoltaic module works normally and the at least one photovoltaic module is bypassed; and the controller is used for controlling the conduction state of the at least one bypass module so as to control whether the at least one photovoltaic module is in the bypass mode or not. The power consumption of the control device is greatly reduced, meanwhile, the problem of voltage stress borne by the first series switch tube in the series control device when the first series switch tube is disconnected is solved, and the safety performance of the bypass control device is improved.

The application discloses a kind of SF6 density relay comprehensive calibration instrument and calibration and measurement method, including intermediate pipeline and be located on the air pump of intermediate pipeline, the one end of the intermediate pipeline is respectively communicated with the one end of safety valve pipeline, first pipeline one end, second pipeline one end, the other end of intermediate pipeline is respectively communicated with the one end of micro water measuring pipeline and third pipeline one end, the other end of the micro water measuring pipeline is respectively communicated with the one end of inlet pipeline and purity measuring pipeline, the other end of third pipeline is respectively communicated with the other end of first pipeline and fourth pipeline one end, the other end of the fourth pipeline is respectively communicated with the other end of purity measuring pipeline, the other end of second pipeline and muffler pipeline, intermediate pipeline side is equipped with suction pipeline;The application has adopted new pneumatic circuit design, combines density relay system calibration circuit with moisture measurement circuit and purity measurement circuit together, with the characteristics such as high measurement efficiency, convenient, its loop structure is simplified, and measurement is efficient.

This invention provides a DC power input reverse connection compatible circuit, a power supply circuit, and a household appliance. The DC power input reverse connection compatible circuit includes a first diode, a second diode, a third diode, and a control switch. The anode of the first diode is electrically connected to the positive input terminal, and the cathode of the first diode is electrically connected to the positive output terminal. The cathode of the second diode is electrically connected to the positive output terminal, and the anode of the second diode is electrically connected to the negative output terminal. The anode of the third diode is electrically connected to the negative output terminal, and the cathode of the third diode is electrically connected to the negative input terminal. The first terminal of the control switch is electrically connected to the negative input terminal, and the second terminal of the control switch is electrically connected to the positive output terminal. A reverse connection detection circuit is used to acquire the reverse connection signal between the positive and negative input terminals, and controls the control switch to turn on or off based on the reverse connection signal. This invention is compatible with both forward and reverse DC power connections and improves circuit safety during reverse connections.

The invention provides a hydraulic soft switching voltage transformation loop based on a zero-voltage resonance principle and a working method thereof. The voltage transformation loop comprises a main voltage transformation system and an auxiliary soft switching system connected with the main voltage transformation system. The main transformation system comprises a pressure source assembly comprising a switch element, and further comprises a liquid sensing element, a one-way valve, a liquid containing element and a load end; the auxiliary soft switching system comprises a resonance unit and a one-way valve; the pressure source assembly is a high-low-pressure constant-pressure network oil source system; the switch element is a high-speed switch valve A1; the liquid sensing element is composed of a hydraulic motor B1 and an inertia flywheel B2. The liquid containing element is a bag type energy accumulator D; equipment at the load end comprises a hydraulic cylinder and a hydraulic motor, and a throttle valve E can be used as temporary replacement equipment; the resonance unit is composed of a liquid sensing element and a compression containing cavity Ch1. The circuit is simple in structure, and facilitates the improvement of the system efficiency and the improvement of the reliability of the soft switching function.

The present disclosure relates to an oscillation device, an oscillator and an electronic device, the device comprising: an oscillation unit, for generating a first voltage signal and a second voltage signal, the first voltage signal and the second voltage signal having the same waveform and opposite phase; a comparison unit, electrically connected to the oscillation unit, for comparing the first voltage signal and the second voltage signal and outputting a comparison signal; a shaping unit, electrically connected to the comparison unit, for shaping the comparison signal to obtain an oscillation signal. The oscillation device of the embodiment of the present disclosure compares the first voltage signal and the second voltage signal generated by the oscillation unit through the comparison unit, and obtains an oscillation signal after the comparison result is shaped, without providing an additional reference voltage, effectively simplifying the circuit structure of the RC oscillator. Compared with the traditional RC oscillator, the output signal of the oscillation device of the embodiment of the present disclosure can achieve a duty cycle of 50%, without the need for additional control of the charge and discharge current.

This utility model discloses a thermal management system and a vehicle. The thermal management system includes: a condenser on a first flow path, a heat exchanger on a first refrigerant branch, and the first flow path being connected to one of a second flow path, a first refrigerant branch, and a third refrigerant branch; an engine radiator and a heater core on a first circuit, and a heat exchange device on a second circuit; a first heat exchange channel connected in series on the second flow path, and a second heat exchange channel connected in series on the first circuit, with at least one of the first and second heat exchange channels exchanging heat with the engine's exhaust pipe; and a second heat exchange assembly, which includes a third heat exchange channel and a fourth heat exchange channel, the third heat exchange channel being connected in series on the refrigerant circuit, and the fourth heat exchange channel being connected in series on the second circuit. According to this utility model's thermal management system, while meeting the heating needs of the passenger compartment, it can reduce engine warm-up time during cold starts, reduce cold start fuel consumption, effectively save energy and reduce costs, and achieve integrated design.

This invention provides a self-protection circuit and a clothing handling device based on overcurrent detection. The self-protection circuit includes a current detection module and a protection trigger signal output terminal. The current detection module includes a first sampling resistor R1 and a second sampling resistor R2, which are connected in series to the inverter output terminal of the intelligent power module. The protection trigger signal output terminal is located between the first sampling resistor R1 and the second sampling resistor R2 and connected to the overcurrent detection input terminal of the intelligent power module. This invention utilizes the overvoltage self-cutoff protection logic of the intelligent power module. By setting two sampling resistors, overcurrent detection of the motor drive circuit can be achieved, improving the response speed of the trigger protection and ensuring the operational reliability of the motor drive.

This utility model belongs to the field of low-voltage electrical technology and discloses a residual current operated circuit breaker. The residual current operated circuit breaker includes a button mounted on a mounting housing and a test device disposed within the mounting housing. The test device includes a first torsion spring, a second torsion spring, a resistor, and a wire: the first end of the first torsion spring abuts against a first terminal block, and the second end abuts against the button; the fourth end of the second torsion spring abuts against a rocker arm of an operating mechanism; pressing the button causes the second end to abut against the third end; when the operating mechanism is in the closed state, the rocker arm causes the fourth end to abut against the first pin of the resistor; one end of the wire is connected to the second pin of the resistor, and the other end of the wire passes through a zero-sequence current transformer and connects to a second terminal block. This utility model can simulate residual current, facilitating testing whether the residual current operated circuit breaker can operate, and helps to periodically check whether the residual current protection function is intact.

This invention discloses a multifunctional handheld electronic device and its control method, relating to the field of electronic product technology. The multifunctional handheld electronic device includes a grip component, a circuit board, and an expansion component. A first switch is mounted on the grip component and electrically connected to the circuit board. The circuit board, also mounted on the grip component, integrates a first functional module and a second switch. The expansion component is detachably connected to the grip component and is equipped with the second functional module. When the expansion component is mounted on the grip component, the second functional module is electrically connected to the circuit board, the second switch is in a first state, and the first switch controls the activation and deactivation of the second functional module. When the expansion component is not mounted on the grip component, the second switch is in a second state, and the first switch controls the activation and deactivation of the first functional module. By automatically switching the control object with a single button, the modular and rapid expansion of functions is achieved.

The invention discloses a VCO amplitude calibration circuit, method and system, and the circuit comprises an amplitude detection module and an amplitude comparison module, the amplitude detection module is used for receiving an oscillation signal generated by a VCO, and converting the oscillation signal into a detection signal; the detection signal is a direct current signal which is in a linear proportional relation with the amplitude of the oscillation signal; and the amplitude comparison module is used for receiving the detection signal and comparing the detection signal with a reference signal to generate a control signal so as to control the tail current of the VCO and further control the oscillation amplitude of the VCO. According to the invention, the output amplitude of the VCO can be controlled in a multi-bit-width manner, and the design is more flexible; the resistance value of an adjustable resistor R in the amplitude detection module can be adjusted through a multi-bit-width control word, so that the output amplitude of the VCO is changed.

A novel tapless resonant push-pull photovoltaic energy storage inverter topology is disclosed, relating to the field of energy storage system topology control technology, specifically a novel tapless resonant push-pull photovoltaic energy storage inverter topology. It includes a photovoltaic boost MPPT circuit, a DC-AC bidirectional inverter circuit, and a battery-side DC-DC tapless resonant push-pull bidirectional isolated charging circuit. The photovoltaic boost MPPT circuit is used to increase the DC voltage of the photovoltaic panels and perform maximum power point tracking control. The DC-AC bidirectional inverter circuit performs bidirectional DC-to-AC conversion through three independent T-type three-level circuits, each independently controlled, with low harmonic output current. The battery-side DC-DC tapless resonant push-pull bidirectional isolated charging circuit includes a tapless transformer and a push-pull circuit. Through innovative tapless resonant push-pull circuit, dual-transformer interleaved control technology, and three-level inverter circuit design, it achieves efficient power conversion, optimized battery charge and discharge management, and reduced high-frequency ripple and electromagnetic interference, thereby improving the overall efficiency, stability, and reliability of the photovoltaic energy storage system.

The invention discloses a center-perforated annular ceramic capacitor, which relates to the technical field of sensors. The annular capacitor is formed by sintering a ceramic base and a ceramic reaction diaphragm. The axes of the ceramic base and the ceramic reaction diaphragm are both provided with through holes, which provide assembly paths for circuit elements to be combined, so that the annular capacitor can be more conveniently integrated into the complex circuit of a temperature-pressure sensor, and the overall structure of the temperature-pressure sensor including the circuit and the sealing structure is simplified, so that the temperature-pressure sensor has an automatic assembly structure, and the production and assembly cost is reduced; the first annular circuit and the second annular circuit of the annular capacitor design have a higher initial value and a wider variation than a circular ceramic capacitor without a center through hole, so that the annular capacitor has a wider range and a finer pressure perception classification, thereby improving the accuracy of pressure measurement.

The utility model discloses a general resistance type temperature sensor input's temperature measurement module circuit, including resistance type input interface circuit, constant current source to interface circuit output constant current, the voltage value of temperature value representation is generated at its two ends, and the same phase input end connection of connection in differential amplifier, and the reference power is selected and switches over by change -over switch S1, and is connected to the inverting input end of differential amplifier, and the amplification factor of differential amplifier is converted into different amplification factor by change -over switch S2 and S3 synchronous, and change -over switch S1, S2 and S3 are a group of synchronous change -over switch. Differential amplifier subtracts reference voltage and then amplifies temperature voltage value according to the amplification factor. The circuit of the utility model is suitable for the unified access conditioning of PT100, PT1000 or NTC 50k and other various resistance type temperature sensors through three or more synchronous switch switching technology, and has the advantages of easy temperature measurement starting point and temperature measurement endpoint implementation.

The utility model belongs to the technical field of intelligent lighting, specifically relates to a kind of external carrier wave dimming module and internet of things lamps and lanterns, external carrier wave dimming module includes control circuit, control circuit includes power module, processor, dimming circuit and carrier wave communication module, power module is connected with processor, processor is connected with dimming circuit and carrier wave communication module;Power module is used to convert the voltage that the power terminal output of the driving power supply of LED lamp is exported, and power supply is carried out to carrier wave communication module and processor;Carrier wave communication module is used to send to processor after receiving dimming command by power line;Processor is used to receive dimming command by carrier wave communication module, and send to dimming circuit;Dimming circuit is used to send to the dimming port of the driving power supply of LED lamp after dimming command is converted into dimming signal.The utility model structure is simple, and construction is convenient, and the intelligentization of existing LED lamps and lanterns can be realized quickly.

A single-stage power supply buck-boost device comprises an AC-DC converter and an input / output circuit. The AC-DC converter has a single-stage flyback architecture and is used for receiving a first AC current and converting the first AC current into a first DC current, and a secondary side of the AC-DC converter adopts a synchronous rectification architecture of a metal oxide semiconductor field effect transistor (MOSFET). The input / output circuit is electrically connected to the AC-DC converter and is used for outputting the first DC current.

The invention provides a low-power-consumption infrared detector system and a working method, and solves the technical problems that an existing infrared detector is large in size and high in power consumption, and long-time stable communication of a laser communication system is restricted. The PCB circuit board comprises a first PCB circuit board and a second PCB circuit board. The top of the first PCB is provided with an infrared detector chip, the bottom of the first PCB is connected with the top of the second PCB through an internal connector, the bottom of the second PCB is provided with an external high-speed connector, and the external high-speed connector is used for transmitting infrared image data to the main control processor. The method can be widely applied to the technical field of laser communication.

The application discloses a kind of cascade H bridge converter and parallel branch modulation method and pre-charging method thereof, on the basis of traditional cascade H bridge converter, and parallel branch is connected with the positive end and / or negative end of adjacent H bridge module capacitor;Positive parallel branch is connected to the positive end of capacitor, and negative parallel branch is connected to the negative end of capacitor;Parallel branch is composed of bidirectional switch.The application connects the positive and negative ends of each sub-module capacitor by parallel branch, realizes the balance of H bridge module capacitor in sequence by conducting parallel branch in the zero state of traditional cascade H bridge converter;The topology avoids the sampling of each module DC voltage, high-speed data transmission and high computational resource consumption capacitor voltage balancing control algorithm, with the advantages of simple circuit structure and control system, low cost, small size, good voltage-sharing effect, easy to expand, etc.

The present application discloses an LED dimmer, an LED dimming system and a control method thereof. The LED dimmer comprises: a dimming module and a bypass module connected in series between a first and a second AC input terminal, wherein the dimming module receives a dimming control signal and obtains dimming data from the dimming control signal, and the load impedances of the dimming module and the bypass module match each other to form a power carrier loop, thereby superimposing the dimming data on the AC voltage to generate a carrier signal. The LED dimmer integrates a signal receiving module and a bypass module, can provide a carrier signal to multiple LED drive circuits, thereby improving the anti-interference ability, and can simplify the circuit structure and volume of the LED drive circuit packaged in the LED bulb, so that it is suitable for packaging into a small-sized LED bulb.