722results about How to "Ensure electricity safety" patented technology

The invention provides a voltage regulation switch power supply relating to electric technique field. The power supply output voltage dc amount is detected by a voltage ripple detecting circuit and fed back to a control circuit to control the turn-on and turn-off of the power switch tube thus to realize regulated output. The voltage ripple detecting circuit of the voltage regulation switch power supply provided by this invention comprises a high pass filtering module, a second order differentiation operation module, a linear operation module, and a clock gating/signal memory module which are connected in series sequentially. The voltage ripple of the voltage regulation switch power supply output voltage is firstly extrated and then performed by second order differentiation, linear operation and memory extension to 'resume' the dc output voltage of the voltage regulation switch power supply which is finally fed back to PWM, PFM or PSM control ciucuit so as to realize regulated output via adjusting the turn-on and turn-off of the power switch tube by the control circuit. The present invention has higher power efficiency and lower circuit cost as well as smaller power supply volume compared with prior voltage regulation switch power supply.

The invention relates to the technical field of electric automobiles, and discloses an electric automobile charging method and a device. The method comprises the steps that a charging pile obtains theidentification information of a vehicle-mounted terminal; the charging pile sends a charging request to a charging pile server, and the charging request comprises the identification information of the vehicle-mounted terminal; the charging pile server sends a charging verification request to a cloud server, and the charging verification request comprises the identification information of the vehicle-mounted terminal; the cloud server judges whether a user label corresponding to the identification information of the vehicle-mounted terminal is contained in the preset user label library or not;if the user label corresponding to the identification information of the vehicle-mounted terminal is contained in the preset user label library, the cloud server sends a first charging instruction tothe charging pile server; and the charging pile server sends a second charging instruction to the charging pile, so that the charging pile can carry out charging operation on the vehicle-mounted terminal. According to the technical scheme provided by the electric automobile charging method and the device, the operation steps of charging of an electric automobile can be simplified, the automatic charging without using mobile phones and charging cards is achieved, so that the electricity utilization safety is ensured during using the charging pile, and the service life of the electric automobile is prolonged.

An all-functional leakage protection plug for ground wire charged tripping comprises a contact, a phase electrode, a zero electrode and a ground electrode of a contact switch, a zero sequence current transformer penetrated between a phase wire and a zero wire, a test loop, an amplifying circuit, a rectifier, controlled silicon, a tripping device, a zero sequence current transformer penetrated through a ground wire, a trigger circuit, an opto-coupler switch and electric resistances, wherein the contact is equipped with a moving contact elastic blade, the contact switch is equipped with a static contact blade, the opto-couple switch comprises a neon lamp and a photo triode the neon lamp and the photo triode are placed in a dark box, the dark box is equipped with a small hole keeping away from the photo triode, the neon lamp is in parallel connection with an electric resistance, and is in series connection with another electric resistance after parallel connection, two ends after series connection are connected with input ends of the zero wire and the ground wire, a collector electrode of the photo triode is connected with the positive electrode of the power source of the amplifying circuit, and an emitting electrode is connected with a trigger electrode of the controlled silicon. The invention has the advantages of tripping and switching off when the ground wire charges to achieve certain voltage to guarantee safety of users, further increasing use safety, prompting users to check and remove potential safety hazard timely, and guaranteeing electricity utilization safety.

The invention relates to a remote centralized display system for dial reading of tap water meters and gas pipeline meters. According to the invention, remote centralized displaying of the dial reading of the tap water meters and the gas pipeline meters with no error can be realized. According to the invention, the dial reading showed on domestic tap water meters and/or domestic gas pipeline meters are shot by a camera to form image signals which are transmitted to a display via a video cable, and the images of the dial reading showed on the tap water meters or the gas pipeline meters are displayed on the display. Multi-path video images transmitted from a plurality of families can be displayed on the display one-path by one-path by a video switcher or a frame segmenter. In this way, the dial reading of the tap water meters and the gas pipeline meters can be displayed in a remote centralization way, and water suppliers or gas pipeline suppliers can read the tap water meters and/or the gas pipeline meters conveniently and rapidly on the display.

The invention discloses a water temperature automatic control circuit for a temperature constant water heater. The water temperature automatic control circuit for the temperature constant water heater comprises an electric heater power supply circuit, a voltage transformation rectifying voltage stabilizing circuit, a display circuit, a mini-type electric water valve circuit, a trigger circuit , a microcomputer chip and a control signal transmission circuit. According to the water temperature automatic control circuit for the temperature constant water heater, the microcomputer chip control technology is adopted, the output power can be adjusted at any time according to dynamic data of the in-out water temperature and the setting temperature, and the water volume is adjusted through a mini-type water valve motor, so that the effect of enabling the effluent water temperature to be constant at any time is achieved and even in winter, when the water volume is large and the water temperature is low, the water heater can automatically adjust the water volume to achieve constant temperature and achieve the effect of being good in utilization comfort of bath and sanitary water.

The invention relates to an alternating-current null-line and firing-line reverse connection and ground line abnormality detection circuit. The alternating-current null-line and firing-line reverse connection and ground line abnormality detection circuit mainly comprises a null-line and firing-line reverse connection detection loop, a ground line abnormality detection loop and a signal output loop, wherein a signal output end of the null-line and firing-line reverse connection detection loop and an output end of the ground line abnormality detection loop are respectively connected with the signal output loop; a PE input end of the ground line abnormality detection loop is respectively connected with an L input end and an N input end, and the signal output loop is connected with a power consumption device controller. The null-line and firing-line reverse connection identification function and the ground line abnormality identification function are integrated, under the situation of the reverse connection of a null line and a firing line and/or abnormality of the ground line, a fault can be accurately judged, and a signal is outputted to the controller of the power consumption device, the controller can take measures to power off the power consumption device in time, the power consumption safety of users can be effectively guaranteed, and the personal injury and death accident can be reduced.

The invention relates to a high and low voltage interlocking device and a method of using the device for realizing power on and power off, which belong to the technical field of circuits. An interlocking switch is parallelly connected onto a low voltage switch, power failure of a low voltage system caused by sudden cutoff of the low voltage switch is prevented, the controller power on and power off state monitoring time is ensured, first low voltage power on and then high voltage power on are realized in the case of power on, and in the case of power off, first high voltage power off and then lower voltage power off are realized, and power safety in the case of power on and power off can be effectively ensured.

The invention relates to a distributed fixed time coordinated control method of an islanded microgrid, and belongs to the field of microgrid operation control. The method in particular comprises the following steps: judging whether a deviation between the frequency and voltage of droop control of a power controller exists or not, if not, not carrying out information communication and data calculation related to two-stage control; if yes, activating the two-stage control, selecting a suitable frequency reference value and a voltage reference value for the droop control of an ith DG unit, thereby enabling output frequency and output voltage of the DG unit to be restored to rated values within a fixed time, and accurately distributing active power, and closing the two-stage control. The distributed coordinated control scheme provided by the invention ensures that the output frequency and voltage of all DG units are restored to the rated values within the fixed time designed in advance after disturbance occurs in the system and output active power of the DG units is accurately distributed, the power quality of the microgrid is improved, and the electricity utilization safety of sensitive loads is ensured.

The invention discloses a lithium ion battery module structure including a top cover, a bottom shell, a cell module, a BMS management module and a PCB transition board. The cell module is positioned and connected to the bottom shell. Cell units inside the cell module are electrically connected among each other through the PCB transition board. Electrode lugs on the cell units are provided with copper lining pieces. Copper foil welding pads, which are corresponding to the cell units one-to-one, are arranged on the PCB transition board. Cell unit connecting clamps are welded onto the copper foil welding pads in a manner of being tightly-clampingly matched with the copper lining pieces. A module supporting plate is bond to a side surface of the cell module and is provided with the BMS management module. The top cover covers the PCB transition board and is integrated with the bottom shell in a manner of buckling connection. The lithium ion battery module structure is optimized, can reduce assembling process, can reduce labor intensity, can improve production efficiency, and can achieve automatic production in batches.

The invention discloses a double hot spare type automatic passing phase separating device, comprising a signal processor, a signal receiver and signal indicator boards. The signal processor is internally provided with a circuit connecting base board and two main control circuit boards; the circuit connecting base board and the two main control circuit boards are respectively connected by a circuit; the front end of the signal processor is provided with two displaying and operating panels, which are respectively connected with the two main control circuit boards by the circuit; the rear end of the signal processor is provided with a connecting socket which is connected with the outside and is connected with the signal processor; and the number of the signal indicator boards is two and the two signal indicator boards are respectively arranged at two driver positions and are connected with the signal processor after being connected in parallel. The double hot spare type automatic passing phase separating device is applicable to automatic control field of high-speed motor train units and electrical locomotives of electric railways, actually realizes reliable and safe automatic passing phase separating of high motor train units and electrical locomotives and guarantees the safe operation of the high-speed electric railways.

The invention relates to a PC-class automatic changeover switch device with an energy storage mechanism. The device comprises a base, a contact system which is arranged on the base, the energy storage mechanism which is in transmission connection with the contact system and a drive motor which is in transmission connection with the energy storage mechanism, wherein the drive motor is fixed on the base through a motor support; the energy storage mechanism comprises an energy storage support unit, an energy storage gear, an energy storage handle, an energy storage spring assembly and an energy storage cam, wherein the energy storage support unit is fixedly connected to the motor support; the energy storage gear is arranged in the energy storage support unit and is in transmission connection with the drive motor; the energy storage handle which is arranged above the energy storage gear and the bottom of the energy storage handle which is engaged with the energy storage gear; the energy storage spring assembly cooperates with the energy storage gear; and the energy storage cam is coaxial to the energy storage gear, is arranged at the outer side of the energy storage support unit and is in transmission connection with the contact system. Compared with the prior art, the device has simple and compact overall structure and convenient processing and manufacturing, and the energy storage mechanism is provided, so that when the automatic changeover switch rotates, the phenomenon of clamping stagnation or failed linkage cannot occur, and the device is safe and reliable.

The invention discloses a home electricity distribution control method. The home electricity distribution control method includes: 1), transmitting total power supply voltage and open-circuit voltage, firing current, operating states, operating and non-operating time of electrical appliances to a memory unit and a calculating unit of a single-chip microcomputer control unit; 2), the calculating unit calculating voltage drop and electric power of the electrical appliances as well as total voltage drop and total electric power of a system, and calculating operating hours of the electrical appliances and transmitting calculating results to the memory unit for storage; 3), at some time, a comparison unit comparing the calculating results of the calculating unit with corresponding rating data in the memory unit; 4), sending powering off or powering on instructions to a corresponding power supply output control unit according to results of the comparison unit, and repeating the step 1), 2), 3) and 4) so as to perform real-time electricity distribution on the electrical appliances. The invention further provides the control system assorted with the home electricity distribution control method. Operating states of the electrical appliances in the system are timely adjusted according to needs of the electrical appliances, and overload operation of the system is avoided.

Driving mechanism for rocking chair, rocking bed and swing is driven by electromagnetism. Permanent magnet is as stator, and electromagnetic core wrapped by operating coil and induction coil is as rotor. Induced current from induction coil and location signal of rotor control current direction of operation coil and operated location, making magnetic poles of rotor be changed properly so as to obtain moment in direction identical to rotation direction alternately and in impulse. The said moment brings along swing body, which is connected to axis of rotation of rotor, rocking automatically.

The invention provides a vehicle-mounted smart power grid. The vehicle-mounted smart power grid comprises a car power source, a smart power grid control unit and a car power supply network, wherein the car power source is used for providing electric energy, the smart power grid control unit is connected with the car power source, and is used for carrying out controller voltage conversion, battery parameter monitoring, battery charge state estimation and power supply overcurrent protection, and the car power supply network is used for supplying power to electric appliances of a whole car. The vehicle-mounted smart power grid has the advantages of being independent of a car electric appliance electronic control system and a communication network, achieving real separation between electricity and control, reducing electromagnetic interference of a power supply line on control signals and communication signals, providing a safe stable power supply environment for electric appliance electronic control and a car communication system, providing classified power supply sources for traditional power loading and electric control units of the electric appliances of the whole car, improving stability and reliability of a controller power source, carrying out real-time monitoring and electricity loss protection on a storage battery, carrying out power supply monitoring and overcurrent protection on subnets, achieving monitoring and protection on power supply of the whole car, and ensuring electrical safety of the car.