10results about How to "Simple circuit structure" patented technology

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.

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 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 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 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.