17results about How to "Complete protection functions" patented technology

The power supply starting circuit has the characteristics of extremely low standby power consumption, perfect circuit protection function, safe and controllable electric energy transmission, complete and reliable starting logic and the like. The invention provides a novel high-voltage auxiliary power supply starting circuit. The novel high-voltage auxiliary power supply starting circuit comprises a starting logic processing unit, a power energy storage unit and a charge release unit, the input end of the power supply starting circuit is connected with an external input voltage, a temperature detection signal and a maintaining voltage after starting, and the output end is connected with an external power supply master control circuit to provide auxiliary power supply starting energy and a protection shutdown signal. The novel high-voltage auxiliary power supply starting circuit is extremely low in standby power consumption, complete in protection function, safe, reliable and complete in starting logic. The problems that a traditional power supply starting circuit is large in standby power consumption, incomplete in protection circuit, incomplete in starting logic and the like are solved.

The utility model discloses an LIN communication integrated driving brushless motor, which belongs to the technical field of brushless motors and comprises a control assembly, an LIN communication assembly, a detection assembly, an external controller, a driving assembly and a motor. The control assembly is connected with an external controller through an LIN communication assembly, and the brushless motor is electrically connected with the control assembly through a driving assembly; the detection assembly is electrically connected with the motor, the driving assembly and the control assembly, and the control assembly, the LIN communication assembly, the detection assembly and the driving assembly are integrated in the motor. Through the above mode, the motor is compact in structure, convenient to use and integrate, high in control precision, and suitable for various applications.

The invention discloses an intelligent panel type fire-fighting voltage-stabilizing control system which comprises a power supply loop, a main loop, a secondary control loop, a voltage-stabilizing pump controller and a signal acquisition module which are arranged in a fire-fighting cabinet, the power supply loop adopts a three-phase four-wire system power supply inlet wire, the main loop comprises two groups of alternating current contactors, a thermal relay and a water pump motor which are sequentially connected in series, the secondary control loop comprises a controller fuse, an intermediate relay and an indicator lamp, and the stabilized voltage pump controller is provided with a MicroSD card to record working state data. The signal acquisition module comprises a pipe network pressure transmitter, a water tank liquid level transmitter and a float switch; by integrating the intelligent control module and optimizing the circuit structure, the problems of low integration level, poor automation degree and insufficient reliability of the existing fire-fighting voltage-stabilizing control system are solved, and the fire-fighting voltage-stabilizing control system has the advantages of high flexibility, complete protection functions, high intelligence degree, strong communication capability, high integration level, safety, energy conservation and high precision; the method can be widely applied to fire-fighting water supply pressure-stabilizing control scenes of various buildings.

The application discloses a broadcast transmitter switching device and a switching method thereof, and the switching device comprises a mechanical carrier and a control unit; the mechanical carrier comprises a cabinet body, a resistor body framework and a fan support are arranged in the lower part of the cabinet body, a first resistor body and a second resistor body are arranged on the resistor body framework, a first fan and a second fan are arranged on the fan support, a first partition plate is arranged on the upper part of the resistor body framework, an external interface plate is arranged on the first partition plate, a second partition plate is arranged in the upper part of the cabinet body, a coaxial converter is arranged on the upper part of the second partition plate, an emergency support is arranged on the lower part of the second partition plate, a front door and a back door are arranged on the cabinet body, a switch, an indicator lamp and a high-frequency power meter are arranged on the front door panel, and the external interface plate and the emergency support are arranged on the inner side of the back door. The application can be effectively applied to the switching of the broadcast transmitter, stable and efficient switching between the main machine, the standby machine, the transmitting antenna and the dummy load can be realized, the performance is stable and reliable, the market prospect is wide, and the application is convenient to popularize and use.

The utility model relates to a vehicle-mounted radio antenna power supply circuit, which comprises a capacitor C01, a capacitor C02, a capacitor C03, a resistor R01, a resistor R02, a resistor R03, a resistor R04, a resistor R05, a resistor R06, a triode Q01, a field effect transistor Q02, an inductor L01, an inductor L01, an inductor L02, a diode D01, a diode D02, a bidirectional diode D03 and a thermistor PTC1. The circuit adopts simple triodes, field effect transistors, resistors, capacitors and other elements, does not need a special chip, reduces BOM cost, and has a perfect protection function and stable power supply capability.

The invention relates to a portable mobile phone back splint solar intelligent charging system which comprises a mobile phone back splint body, a photovoltaic power generation panel, a charging management system, a mobile phone charging interface, a mains supply charging interface, a voice hole, a lens hole and a charging state display module. The photovoltaic power generation panel is integrated on the mobile phone back clamp, and solar energy is utilized to provide continuous and stable electric energy for the mobile phone. And after the battery management system converts and protects the electric energy, the mobile phone battery is charged through the charging interface. The problem that the mobile phone is insufficient in cruising ability is solved, and the mobile phone has the advantages of being environmentally friendly, efficient and free of an external power source.

The invention belongs to the technical field of power supply management, and particularly provides an alternating current and direct current power supply isolated output switching device, which comprises a power supply input and preprocessing module used for accessing an alternating current main power supply and a direct current standby power supply and performing preprocessing protection on the two power supplies respectively; the power supply detection and control module is used for acquiring electrical parameters of the alternating-current main power supply and the direct-current standby power supply in real time, judging a power supply state of the power supply according to an acquisition result and outputting a control signal; the relay isolation switching module comprises two relays respectively corresponding to the main power supply branch and the standby power supply branch, and realizes physical isolation and automatic switching of the AC / DC power supply based on the control signal; the output adaptation and protection module is used for providing a corresponding output branch according to the load type and protecting an output power supply; wherein the two relays adopt an interlocking design to ensure that the two relays are not conducted at the same time.

The utility model discloses a digital configuration type resonant switching power supply, which comprises a digital configuration type PFC (Power Factor Correction), an LLC (Logical Link Control) resonant control circuit, a half-bridge resonant conversion circuit, an output rectification filter circuit and an output voltage regulation circuit, and perfects the self-configurable protection functions, including power supply undervoltage protection, overpower protection and internal and external overheat protection. The capacitor mode is adjusted, accurate overvoltage protection, overcurrent protection, surge current protection, power-on / power-off protection and the like are realized, and the normal working state and reliability of the power supply are ensured; optimization of stable adjustment of PFC and LLC resonance control circuits is realized, and miniaturization, high efficiency and standardization of an industrial power supply are realized.

The utility model provides an auxiliary mounting jig for vertically hanging an anode hanger. The auxiliary mounting jig comprises an outer frame, a base, a slide rail, rollers, a lower hanger, an upper hanger and other main components. The outer frame serves as a main body supporting structure, the sliding rail is installed in the outer frame, and the base can slide along the sliding rail. The lower hanging frame is arranged in a groove of the base, the upper hanging frame is arranged above the lower hanging frame in parallel at intervals, and accurate alignment is achieved through the positioning bottom block and the lower hanging positioning column. The rolling wheel is in rolling contact with the upper hanging frame, the shifting piece is clamped with the annular groove of the lower hanging positioning column through the clamping groove, and stable installation of the upper hanging frame and the lower hanging frame is achieved. The jig is further provided with auxiliary structures such as a sliding rail organ cover, a stopping block, a guide strip, a clamping assembly, an illuminating lamp and a handle, and the operation convenience, stability and safety are further improved. The anode hanger can be quickly and accurately mounted, the production efficiency is remarkably improved, and the anode hanger is suitable for anodic oxidation treatment of workpieces such as mobile phone middle frames in the electroplating industry.

The application discloses a child electric off-road vehicle frame, which comprises a bottom plate, a main frame mounted on the top of the bottom plate, a main body frame of the main frame being a triangular truss structure composed of hollow pipes, a plurality of reinforcing pipes arranged on the main frame, a front anti-collision fence and a rear anti-collision fence arranged at the front end and the rear end of the bottom plate respectively, two parallel slide grooves formed in the center of the top of the bottom plate, and accommodating holes formed in the two inner walls of the slide grooves in the length direction; an anti-collision damping mechanism arranged in the slide grooves and the accommodating holes, comprising a damping spring, a contact rod and a sliding block, the spring being assembled in the accommodating hole, one end of the contact rod being fixed on the damping spring, the sliding block being arranged in the slide groove, the other end of the contact rod being in abutment with the sliding block, and the two sliding blocks being integrally formed on the same seat mounting plate; the anti-collision damping mechanism can play a role of shock absorption and impact force absorption when the off-road vehicle is subjected to a transverse impact.

The invention belongs to the technical field of converters, and discloses a Sepic power factor correction converter which comprises a conversion circuit, the conversion circuit comprises a port L and a port N. The port L is connected with one end of a capacitor C201 and one end of an inductor L21, the other end of the capacitor C201 is connected with one end of a capacitor C244, the other end of the inductor L21 is connected with a drain electrode of an MOS tube Q15, a negative end of a diode D57 and one end of a capacitor C277, and the other end of the capacitor C277 is connected with a negative end of a diode D57. The other end of the capacitor C277 is connected with one end of an inductor L17 and a pin 1 of a transformer T4, and a source electrode of the MOS tube Q15 is connected with a source electrode of the MOS tube Q14, a positive end of a diode D57, a positive end of a diode D58, the other end of the inductor L17, one end of an inductor L20, a pin 2 of the transformer T4 and a pin 3 of the transformer T4. The circuit has the advantages of being complete in protection function, high in circuit reliability, simple in software control and low in cost.

The invention relates to a position sensorless direct current brushless motor and a starting method thereof. The motor comprises a motor housing, a front end cover, a rear end cover, a rotor, a stator, a two-phase armature winding, a power tube integrated board, an encoder, an encoder accessory, a rear cover, a zero-crossing detection module, a motor control module and a three-phase drive module. The rear cover is connected to the rear end cover, the encoder is arranged in the rear cover and connected to the rear end of the rotor, the power tube integrated board comprises a stator power tube and a rotor power tube, the power tube integrated board is communicated with the encoder, one end of the zero-crossing detection module is connected to the encoder, and the other end is connected to the motor control module, one end of the three-phase drive module is connected to the motor control module, and the other end is communicated with the two-phase armature winding, the encoder accessory is connected to the encoder, and the position sensorless direct current brushless motor has high operating efficiency and accuracy, low loss, strong anti-interference ability and small size.

The invention discloses a three-level open source driver system, which relates to the field of electromechanical control, and comprises a signal adapter board, a three-level processing board, a three-level driving board, a three-level bus capacitor board and an EMC electromagnetic compatibility board; the EMC electromagnetic compatibility board is used to reduce and suppress electromagnetic interference generated by the three-level open source driver system; the signal adapter board is used to collect signals and send the collected signals to the three-level processing board; the three-level processing board is used to condition the collected signals, and the three-level processing board comprises a first sampling signal conditioning module, a digital input module, a digital output module, a multi-channel power supply module, an encoder collection module, a protection module and a fault reset module; the system has the advantages of small voltage change rate, large output capacity, small loss, low distortion factor, low output harmonic content, high topology withstand voltage, good output voltage signal quality and perfect protection function.

The utility model provides a portable programmable power supply for maintenance and support of avionics equipment. The portable programmable power supply comprises a programmable adjustable DC voltage stabilization module, an assembled battery, a DC voltage stabilization module, an intelligent charging module and an assembled battery protection module. When the avionics equipment is maintained indoors, the program-controlled adjustable direct-current voltage stabilizing module supplies power to the avionics equipment and the measurement and control host and charges the assembled battery through electric energy provided indoors, and when the avionics equipment is maintained outdoors, the program-controlled adjustable direct-current voltage stabilizing module receives the electric energy provided by the assembled battery and charges the assembled battery through the program-controlled adjustable direct-current voltage stabilizing module. And a working power supply is provided for avionics equipment and a measurement and control host. Charging of the assembled battery is protected through the direct current voltage stabilization module and the intelligent charging module, and the assembled battery is controlled and protected through the assembled battery protection module. Through the scheme, the flexibility and reliability of the power supply can be improved, the power supply requirements of indoor and outdoor avionics equipment are met, and the safety, stability and high efficiency of the battery in the charging and discharging process can be ensured.

The invention relates to a test platform in a vacuum cabin, belongs to the technical field of aerospace liquid attitude and orbit control engine test, solves the technical problems of low bearing capacity and poor flexibility of the test platform, and comprises a basic platform, a frame structure and a moving mechanism which are sequentially connected from bottom to top. The foundation platform is fixed to a foundation and comprises a platform face, supporting stand columns, connecting pipes, corrugated pipes, base plates and foundation bolts. The frame structure is installed above the foundation platform, fixedly connected with the foundation platform through bolts and used for transmitting thrust of the engine to the foundation platform and supporting the engine to a certain height. The moving mechanism comprises a fixed guide rail, a guiding guide rail, a moving trolley, a sliding block, a steel ball and a bolt and is used for installing the thrust measuring device and the engine. The device is used for the high-altitude simulation test of the aerospace liquid attitude and orbit control engine.

The invention discloses a screw compressor capacity control system and method capable of switching speed at a fixed frequency, comprising a screw compressor with a fixed frequency motor, a bypass slide valve with adjustable capacity installed on the screw compressor, a bypass slide valve action driver, a motor driver, a controller and a load measuring device, the bypass slide valve is connected to the bypass slide valve action driver signal and is controlled by the bypass slide valve action driver, a bypass slide valve position sensor is also provided, the bypass slide valve position sensor is connected to the screw compressor for measuring the slide valve position, the load measuring device is used to detect the compressor operation load state, the motor driver is connected to the fixed frequency compressor; the bypass slide valve position sensor, the bypass slide valve action driver, the load measuring device, the motor driver and the controller are connected by signal. A higher performance coefficient COP is achieved when running at full load and partial load, adapting to the site with frequent starting, and suppressing the starting current peak.

The utility model provides a hot-melt printing food packaging bag and a food packaging bag, and relates to the technical field of packaging, the hot-melt printing food packaging bag comprises a bag body, a convex plate is arranged on the inner side of the bag body, the inner side of the bag body is fixedly connected with one side of the convex plate, a concave plate is arranged on the inner side of the convex plate, the inner side of the convex plate is matched with one end of the concave plate, and the other end of the concave plate is fixedly connected with the bag body. And plastic ropes are arranged in the concave plate and the convex plate. The marker is designed on the inner wall of the bag body and is positioned at the bag opening, the convex plate and the concave plate are designed above the marker, and the plastic rope is arranged between the convex plate and the concave plate, so that if a bad merchant tries to separate the convex plate from the concave plate, the plastic rope for connecting the convex plate and the concave plate is broken, and the plastic rope is designed to be unable to recover once being broken, so that the bad merchant cannot recover the convex plate and the concave plate. Therefore, an irreversible tamper-proof mechanism is formed, once the plastic rope is broken, the separation of the convex plate and the concave plate is obviously exposed, the integrity of the marker is damaged, the state is clear and visible, and the tamper behavior is easy to identify.