15results about How to "Avoid current shock" patented technology

The invention relates to the technical field of equipment control, in particular to a self-adaptive switching method and system of a current transformer. The method comprises the following steps: collecting primary side parameters and secondary side parameters of a current transformer to obtain primary side collection parameters of the current transformer and secondary side collection parameters of the current transformer; performing current transformer state segmentation initialization according to the current transformer primary side acquisition parameters and the current transformer secondary side acquisition parameters so as to generate a current transformer operation state classification result; switching result judgment is conducted on the current transformers according to the current transformer operation state classification result, and when the current transformer operation state classification result is a current transformer critical state section, parallel buffering is conducted on the current transformers, and critical current transformer switching data are generated. According to the invention, through accurate state classification, a dynamic switching mechanism, time sequence optimization and visual display, the switching sensitivity and stability of the current transformer are improved.

The utility model relates to the technical field of mother and baby products, and provides a breast pump main machine and a breast pump, the breast pump main machine comprises a shell and an air pump, an air valve and a control unit which are arranged in the shell, and the shell is provided with a negative pressure output port; the air valve is connected to the air pump and the negative pressure output port; the control unit is connected with the air pump and used for sending a first control signal to the air pump when the air valve is opened and sending a second control signal to the air pump when the air valve is closed, and the power of the second control signal is smaller than that of the first control signal. According to the utility model, the control unit sends the first control signal to the air pump and the air pump operates normally at a larger first power at the stage that the air valve is opened for exhausting, and the control unit sends the second control signal to the air pump and the air pump operates at a smaller second power at the stage that the air valve is closed for exhausting, so that the problem of current impact caused by frequent start and stop of the air pump is avoided; and the service life of the product is prolonged.

The invention relates to the technical field of solar street lamp control power distribution, in particular to an urban road solar street lamp control power distribution system which comprises a global power distribution strategy unit, an independent power distribution strategy unit and a storage battery protection unit. When the global power distribution strategy unit is in the first illumination demand mode, coordinating the electrical load in the area, then collecting environmental data, predicting future illumination change in combination with historical environmental data and brightness records, calculating a dimming demand and generating a global power distribution strategy; when the independent power distribution strategy unit is in the second lighting demand mode, the independent power distribution strategy is generated by detecting the speed and direction of the vehicle and the pedestrian and combining the dimming safety step length to determine the position of the pre-adjusted street lamp; the storage battery protection unit generates a health prediction curve by diagnosing the health state of the battery, and formulates a battery pack load dispersion strategy in combination with the current load demand. By optimizing a power distribution strategy and battery management, power consumption is reduced, and the service life of the solar street lamp system is prolonged.

The present application relates to a control method for a DC transformer, which is applied to a switched capacitor connected DC transformer, the method comprising: controlling the pre-charging of each DC conversion unit, and determining a first preset number of the DC conversion units as power transmission modules and a second preset number of the DC conversion units as redundant modules; wherein the sum of the first preset number and the second preset number is less than or equal to the preset number; and rotating and controlling each power transmission module and each redundant module in a preset rotation order, so that the switching loss of each power transmission module is within a preset loss range, and the voltage change of the switch capacitor of each redundant module is within a preset voltage range. The use of this method can make the SCDCT block capacitor voltage constant, ensuring the long-term operation safety of the SCDCT.

This invention provides a high-voltage electronic fuse for vehicles, comprising a MOSFET module, a pre-charge circuit, an output voltage acquisition circuit, an isolation drive circuit, and a signal isolation circuit. The MOSFET module, connected at both ends to the high-voltage input and high-voltage output terminals of the high-voltage main circuit, is connected in parallel with the pre-charge circuit. The isolation signal drive circuit includes a high-voltage side and a low-voltage side. The switching signal Pre_EF of the pre-charge circuit input on the low-voltage side and the switching signal ON_EF of the MOSFET module can respectively isolate and drive the high-voltage side signals S1 and S2. The isolation drive circuit uses the high-voltage output terminal HV_OUT as a reference ground signal for the high-voltage side. Furthermore, this invention also discloses an intelligent high-voltage power distribution unit for vehicles. This invention, through optimized design and effective driving of each sub-module of the electronic fuse, can provide safe protection for the high-voltage circuit and its operating equipment.

The invention relates to a power management system and method for a server in an immersed liquid-cooled cabinet, and the system comprises an energy storage module, a power monitoring module, a zero-voltage starting circuit unit, a current monitoring unit, a main power module, a redundant power module, and a control module. The protection of the immersed liquid cooling cabinet and the server is realized; the current monitoring unit monitors current in a power supply circuit of the power supply and judges whether overcurrent or short circuit occurs in the power supply circuit; the main power supply module firstly supplies power to the immersed liquid cooling cabinet and the server; when the main power supply is abnormal, the control module switches the main power supply module to the redundant power supply module; the power supply monitoring module collects data of various performance parameters of the main power supply module or the redundant power supply module. Effective management of the power supply is realized, and normal operation of a liquid cooling cabinet and a server in a current mode is guaranteed.

The invention provides a three-dimensional scanner and a control method of the three-dimensional scanner. The three-dimensional scanner comprises a control module, a power supply module and at least two functional modules, and each functional module is connected with the control module and the power supply module. The power supply module is connected with a power supply; the power supply supplies power to the at least two functional modules through the power supply module; and the control module is used for controlling the power supply module and the on-off of the power supply circuit of each functional module, so that the total power consumption capacity of the functional modules working at the same time in the same time does not exceed the power supply capacity of the power supply. The control method of the three-dimensional scanner is used for the three-dimensional scanner provided by the invention, and the control method comprises the following steps: controlling the on-off of a power supply circuit of a power supply module and each functional module, so that the total power consumption capacity of the functional modules working at the same time in the same time does not exceed the power supply capacity of a power supply. By controlling the on-off of the power supply circuit of the power supply module and each functional module, the power consumption capacity at the same time is reduced, and the current impact is reduced.

This invention discloses an integrated cable anti-drag storage device and method for car charging piles, applied in the field of car charging pile technology. The key technical points are: it includes a base and a charging pile body fixedly connected to the base; the charging pile body has a charging gun head based on the cable; a mounting base is externally fixedly connected to the charging pile body; a first cable storage component, a release restriction component, and a second cable storage component are sequentially arranged along the cable direction within the mounting base; a lever lifting component is also provided on the base; a locking release component is fitted and fixedly connected to the charging gun head; and a buzzer for emitting an alarm sound and a fault indicator light for indicating a malfunction are fixedly provided on the charging pile body. The technical effects are: preventing the charging cable from being dragged while reducing the possibility of damage to the charging gun and improving charging safety.

The utility model relates to the technical field of power electronic technology, and discloses an energy-saving electromagnet driving control circuit. The working power supply module is used for supplying power to a CPU control module and a control output module; the commercial power zero-crossing detection module is used for detecting a zero-crossing signal of commercial power; the CPU control module is used for outputting a working signal or a stop signal of a driving electromagnet according to a received key signal; the control driving module is used for waiting for a zero-crossing signal after the working signal or the stop signal and outputting a corresponding control signal to the control output module to drive an electromagnet; the control output module waits for a mains supply zero-crossing signal after receiving the working signal or the stop signal, and then outputs a control signal to the control output module so as to drive the electromagnet to work and stop; the on-off of the electromagnet is controlled during mains supply zero passage, so that current impact generated by on-off at a voltage peak value can be avoided, the energy loss of the electromagnet during starting and stopping is reduced, and the energy-saving effect is improved.

The application discloses a kind of air bag energy storage capacitor discharge control circuit and system, it is related to automobile passive safety technical field, including delay discharge control circuit and hierarchical active discharge circuit.Delay discharge control circuit is responsible for monitoring power supply bus state and carries out delay timing after power failure, after the timing length reaches the preset delay length, control hierarchical active discharge circuit to gradually increase the discharge current mode to energy storage capacitor discharge, only vehicle ignition is controlled energy storage capacitor discharge after exceeding the preset delay length, effectively avoid the frequent charge-discharge aging of energy storage capacitor when vehicle short-time parking, reduce the energy consumption of vehicle, while avoiding the current impact of active discharge instant, improve the running stability of air bag system and device life.

The invention provides a start control method and device for an energy type flexible direct current system, and relates to the technical field of flexible direct current power transmission of a power system, and the method comprises the steps: 1, controlling a protection unit to be powered on, and completing hardware self-inspection and software initialization; and step 2, based on hardware self-inspection and software initialization, setting a converter station control mode, controlling a secondary side switch of the converter transformer to be closed, pre-charging the direct current bus through the converter valve module until the voltage of the direct current bus reaches a target pre-charging voltage, and meanwhile, keeping the super-capacitance branch module in an off state. According to the invention, the impact current when the energy storage branch is input is reduced, and the safety of the system starting process and the equipment reliability are improved.

The application discloses a super capacitor energy storage power energy optimization system based on a Boost converter, relates to the technical field of power supply or power distribution circuit devices and electric energy storage systems, and comprises a pre-charging circuit, a super capacitor energy storage device, a Boost circuit, an LLC full-bridge inverter circuit, a rectification filtering and buffering circuit, a detection unit and a controller. The Boost circuit is connected between the super capacitor energy storage device and the LLC full-bridge inverter circuit and is used for boosting voltage when the output voltage of the super capacitor energy storage device is lower than a preset threshold value. The data acquisition unit acquires data to regulate and control the boosting work of the Boost circuit and the driving logic of the LLC full-bridge inverter circuit. The application adds the Boost circuit between the super capacitor energy storage device and the full-bridge inverter circuit, and solves the problems of low energy utilization rate and unstable output of the existing super capacitor energy storage high-voltage power supply.

The embodiment of the invention discloses a power connection method and a power connection system. The power-on system includes a first battery configured to supply power to the vehicle, a second battery, and a power-on power source. The power-on method comprises the steps that if a first battery of the vehicle is in a power-lack state, a power-on power source is adopted to charge the first battery; if the internal total voltage of the first battery reaches the preset first voltage, the second battery is adopted to charge the first battery, so that the problem of current impact on the first battery caused by relatively large charging current of the second battery for charging the first battery in the process of charging the first battery by the second battery can be avoided; and meanwhile, the problem of relatively long charging time caused by low-current charging of the first battery can be solved.

The present invention provides a current limiting method for a grid-type inverter based on virtual impedance switching, and relates to the field of power electronic control technology. The method includes performing voltage and current dual closed-loop control on the output voltage and inductor current of the grid-type inverter, and then performing SPWM modulation on the control output to obtain a pulse signal for driving each switch tube in the grid-type inverter. Among them, when the instantaneous value of the three-phase current in the output current exceeds the preset current threshold, a virtual impedance is input in the voltage and current dual closed-loop control through the first state machine. After the power grid is restored, the second state machine controls the first state machine to switch the state and cut off the virtual impedance. The method can limit the output current in time during the fault period, avoid the inverter device from being subjected to excessive current shock, and protect its safety. At the same time, the active power output can be quickly restored after the fault is cleared, thereby improving the reliability and stability of the system.

The present invention provides a control chip power on-off device and an operation method thereof. The control chip power on-off device includes a control register, a logic control circuit and a power switch, wherein the control register includes N special registers; 2≤N≤6; the special register includes a write enable generation circuit, a selector and a D flip-flop, the write enable generation circuit is connected to the selector, and the selector is connected to the D flip-flop; the logic control circuit includes N power request generation circuits and N power switches, the N power request generation circuits correspond to each other and are connected to the N power switches in sequence, and the N power switches output their respective power supplies. The present invention has a power domain switch selection function, and selects the power domain to be turned off or on through a special register. Under the configuration of the special register, the selected power domains are turned on or off successively, thereby reducing the overall power consumption of the chip and achieving the purpose of reducing instantaneous current impact.