724results about How to "Ensure electricity safety" patented technology

The invention provides a current regulation power supply relating to electric technique field. The power supply output current 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 current 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 current 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 current 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 current regulation switch power supply.

The invention provides an intelligent multifunctional socket, a data acquisition module, a control module, a wireless signal transceiving module and an alarm module are arranged in an ordinary socket, the control module is connected with the data acquisition module, the wireless signal transceiving module and the alarm module respectively, and the wireless signal transceiving module is in wireless connection with a visualized terminal with the wireless signal transceiving function. Through different sensors, the real-time data of a current working environment can be obtained, the control module is used for making a judgment, and the judgment result is transmitted to the visualized terminal, thereby enabling management staff to process various circuit conditions in time, ensuring safe and effective working of a circuit and being applicable to production, living, entertainment and other various places. Simultaneously, the intelligent socket breaks the condition that a fuse is added as the single judgment standard of safe operation of the ordinary socket, and can further avoid the inconvenience caused by the situation that the circuit can not be recovered within a short period of time due to disconnection of the fuse.

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 discloses an intelligent power supply control system comprising a remote controller, a data processing module, a wireless communication module, a display module, a human-computer interaction module, a sensor, a switch module and a power acquisition module, wherein the remote controller is used for sending control information and receiving state information; the power acquisition module is used for acquiring the current energy consumption value of electric equipment, the sensor is used for acquiring the current temperature value, and the data processing module is used for controlling the switch module to cut off the electric equipment when the energy consumption value and the temperature value exceed a certain range; the display module is used for displaying the state information and the control information; and the control information can be sent to the data processing module through the operating the human-computer interaction module. The intelligent power supply control system provided by the invention can be used for monitoring the energy consumption of the electric equipment in real time and can cut off the electric equipment when the amount of the electric equipment is larger, the instantaneous power is higher or a device is overhigh in temperature, so that the power utilization safety of residents is ensured.

The invention discloses an internet-of-thing-based power distribution management system and an on-line monitoring method thereof. The system is formed by four parts, that is, an intelligent distribution box terminal, a remote upper computer management system, an acousto-optic alarm and a mobile terminal. On one hand, the intelligent distribution box terminal is in bidirectional connection with theremote upper computer management system, and is used for sending distribution box operation electrical parameters to a remote upper computer and receiving a control instruction sent by the remote upper computer; and on the other hand, the intelligent distribution box terminal is in one-way connection with the acousto-optic alarm, and is used for starting the acousto-optic alarm for alarming onceabnormal operation occurs. The remote upper computer management system receives the data sent by the intelligent distribution box and carries out corresponding processing on the data, and once the data is abnormal, on one hand, immediately starts an alarm module thereof and pushes alarm information to the mobile terminal, and on the other hand, immediately sends an instruction to the intelligent distribution box to starts a control loop to ensure electrical safety, and starts the acousto-optic alarm controlled thereby.

An electrical-safety charging pile comprises a charging pile body. A rotary groove is arranged in the charging pile body, a winding disc is rotatably installed in the rotary groove, a step groove is arranged in the left end face of the charging pile body, an interconnected through hole is arranged between the step groove and the rotary groove, a charging cable is wound on the winding disc, a central groove extending vertically is arranged in the position of the center of the upper end wall of the rotary groove, a slider is installed in the central groove in a vertical sliding manner, a first mounting groove communicated with the central groove is arranged in the upper end wall of the central groove, a lifting thread hole with the opening facing the first mounting groove is arranged in the slider, a lifting thread rod is mounted in the lifting thread hole in a thread fitness manner, the upper end of the lifting thread rod is rotatably mounted in the first mounting groove and is fixedly provided with a first bevel gear, an elastic pressure piece and a conductive pillar located at the position of the center of the elastic piece are fixedly mounted to the lower end of the slider, and a conductive sleeve is mounted at the position of the center of the end face of the winding disc and facing the slider.

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 provides an assembly structure of an assembly-type concrete member. A sleeve comprises a non-grouting connection section and a grouting connection section. A steel skeleton comprises inner barbs and outer barbs, the diameter of a passage defined by the multiple inner barbs is smaller than that of a second to-be-connected steel bar, and the outline diameter defined by the outer barbsis larger than the diameter of an inner cavity of the grouting connection section. An alignment device comprises lower supports and upper supports which are both electromagnets, the same magnetic poles of the upper supports and the lower supports are opposite, and the upper supports and the lower supports are connected in the same circuit in series. All parts of the grouting sleeve are machined and manufactured correspondingly and then assembled, mass production is achieved, and the quality of all the parts is easy to control; connection of the grouting sleeve and a steel pipe transition section is operated by machines in a factory, the threaded connection quality is easy to control, the self-locking type steel skeleton is adopted, thus the purpose of pulling preventing is achieved, and shock resistance is improved; through the principle of magnetic levitation, fast and accurate centering of the steel bars of upper and lower concrete member bodies is achieved, so that the time and labor are saved; and through the series-connection circuit, the same magnetic forces of a plurality of supporting mechanisms can be achieved, and stable supporting is guaranteed.

The invention relates to a method and a device for low-voltage arc fault detection. The device for low-voltage arc fault detection comprises a current transformer, an I / V converting circuit, an operational amplifying and rectifying circuit, a pulse shaping circuit and a micro controller which are sequentially connected. According to the invention, the current transformer detects load current signals, the I / V converting circuit converts the current signals into corresponding voltage signals, the voltage signals are inputted into the operational amplifying and rectifying circuit so as to be amplified and rectified to acquire absolute value signals with an appropriate proportion, the absolute value signals are shaped by the pulse shaping circuit so as to form rectangular pulse signals, the micro controller captures the pulse width time of pulse signals outputted by the pulse shaping circuit and judges whether the current waves at present are arc fault half waves or not through judging whether the pulse width time variation rate corresponding to current half waves of an adjacent period exceeds a threshold value under a corresponding current level or whether high-frequency impulses are captured continuously, thereby being capable of accurately detecting general load arc faults, cutting off the circuit in time, and ensuring the safety in electricity utilization.

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 discloses a power consumption management device for a charging pile in a district. The power consumption management device comprises a power supply module, a control module, a measurement module and a communication module; the power supply module supplies power; the measurement module measures data and uploads the data to the control module; and the control module makes a decision and sends out a control signal by the communication module. The invention further discloses a power consumption management method of the power consumption management device for the charging pile in the district. The power consumption management method comprises the steps of acquiring parameters of a power system in the district, and storing control flow of the charging pile in the district in advance; calculating working condition parameters of a district transformer and the charging pile; and carrying out power consumption management on the charging pile. According to the power consumption management device and the power consumption management method which are disclosed by the invention, the working parameters of the charging pile and real-time operation parameters of a power grid are measured, then the measured parameters are sent to a control board to carry out comparison, and finally, by the power consumption management method provided by the invention, the decision is made and a control instruction is issued, and thus, the power consumption management device and the power consumption management method can implement automatic ordered management of the charging pile in the district so as to ensure security and scientificity of power consumption in the district.

The invention provides a monitoring system of service conditions of electrical appliances and an application method of the monitoring system. With the adoption of the technical scheme that voltages and currents of subcircuits of the electrical appliances are collected by a collecting unit on electrical appliance sides, the service conditions of the electrical appliances are calculated by a calculating unit, and the service conditions of the electrical appliances are fed back to a display unit for a user to view by a first wireless communication unit and a second wireless communication unit, the user can know electricity consumption conditions of the electrical appliances at any time through intelligent mobile equipment with the second wireless communication unit, so that a better power utilization habit is formed; energy resources are saved; household expenses are reduced; the electricity consumption conditions of the electrical appliances can be known at any time; and the power utilization safety can be ensured.

The invention relates to the field of electrical safety and provides a leakage protection method and a leakage protection device, which are used for solving the problems of inaccurate leakage protection and high probability of misoperation in the prior art. The method comprises the following steps of: acquiring a residual current signal input by a zero sequence mutual inductor in a power supply circuit; performing analog to digital (A / D) conversion and digital filtering on a residual current so as to eliminate interference signals, and calculating the amplification change rate of the residualcurrent; and disconnecting the power supply circuit if the amplification change rate of the residual current exceeds a first threshold value. The embodiment of the invention has the advantages of more accurately performing leakage protection and monitoring, and improving the reliability of normal work of a power supply system on the premise of ensuring electrical safety.

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 relates to an anti-electric-shock socket board. The anti-electric-shock socket board comprises a safety cap (1), three safety cap notches (2), an upper cover button square frame (3), a safety box body (4), three safety box body notches (5), a safety box body lock catch (6), a power switch button (7), a safety cap fastener tape (8) and a socket electric wire hole (9). According to the anti-electric-shock socket board, a cap with a socket and a method for locking the cap with the socket are adopted so that a number of normally-used plugs are fixed and then the cap is covered and locked to ensure that a child cannot contact the pugs, as a result, the safety of a multi-purpose socket is ensured fundamentally, and the power utilization safety for children is ensured from the other side.

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 valve opening and closing mechanism with an interlock for a movable high-voltage switch cabinet, which comprises an upper valve, a lower valve and a valve opening and closing mechanism. The upper valve and the lower valve are arranged on a circuit breaker chamber of the switch cabinet in a longitudinal symmetry way. The mechanism is characterized in that the upper valve and the lower valve are foldable valves respectively formed by linking an upper valve plate with a lower valve plate through hinges; the left sides and the right sides of the upper valve and the lower valve are respectively fixed with an upper slide block and a lower slide block; and the upper valve and the lower valve can respectively slide along concave slide grooves arranged at the left side and the right side of the circuit breaker chamber through the upper slide block and the lower slide block. The mechanism has the advantages of convenient installation, synchronous starting and no clamping stagnation, and the electrical clearance meets the international standard, and can realize the functions of interlock and padlock.

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 an automatic livestock drinking trough and a method thereof. The drinking trough comprises a mechanical part and an electrical part. The mechanical part comprises a water tank, a floater, a lever, a rotary support, a connecting rod, a cross rod with a hole, a fixing support, an armature, a magnet, a spring, a water supply pipe, and pin rolls. The electrical part comprises a DC power supply, a plug, a relay, and a solenoid valve for water. The rotary support is rotatably connected with the lever through the first pin roll. One end of the lever is rotatably connected with the connecting rod through the second pin roll. The connecting rod is fixed with the floater. The other end of the lever is fixedly provided with the magnet. The magnet is provided with conductive electrode plates. The fixing support is fixed with the spring. The lower end of the spring is fixedly provided with the armature. The armature is electrically connected with the relay, the DC power supply, and the conductive electrode plates. The solenoid valve for water is electrically connected with the plug. The relay controls the solenoid valve for water so as to control on-off of the water supply pipe. The water tank is provided with the cross rod with a hole to fix positions of the floater. The drinking trough is simple in structure, and can automatically supplement water of the livestock drinking trough according to water level.

The invention discloses a socket capable of automatically popping out a plug. The socket comprises a panel with jacks, wherein a push plate is arranged in the socket and is supported by a compression spring below the push plate; a support pillar which is perpendicular to the panel is arranged above the push plate; the panel is provided with a through hole corresponding to the support pillar; a locking device is arranged on one side of a clamping port in the sidewall of the support pillar and comprises a spring pin matching with the clamping port, a poking wheel corresponding to the spring pin, a metal poking sheet located at one side of the insertion position of a metal sheet of the plug, and a sliding wheel for connecting the poking wheel with the metal poking sheet; the poking wheel and the sliding wheel are coaxially arranged on a fixed shaft; the metal poking sheet is connected with an inner ring of the sliding wheel; the poking wheel is connected with an outer ring of the sliding wheel; poking teeth corresponding to a bump on the spring pin are distributed on the circumference of the poking wheel; and the inner ring of the sliding wheel is connected with a positioning shaft through a torsion spring. After the plug is plugged into the socket, the support pillar is automatically locked by the spring pin; and after an electrical appliance is turned on, power is provided normally. When the electrical appliance is turned off, the plug can be popped out automatically to guarantee safety of power utilization.

An intelligent door lock system comprises a wireless communication module, a storage, a single-chip microcomputer, a door lock operation device, a normally-closed relay and an infrared monitoring module. The wireless communication module receives door lock verification information. User information is stored by the storage. Whether a person lingering for a long time outside a door exists or not is monitored through the infrared monitoring module. The door lock verification information and the user information are compared through the single-chip microcomputer, so that a comparison result is acquired and a power-off control signal is output when a user leaves and the door is reversely locked. A door lock is operated through the door lock operation device according to the comparison result. The power-off control signal is received by a coil of the normally-closed relay. A contact switch of the normally-closed relay is connected to a power supply circuit of household appliances in series. The contact switch of the normally-closed relay is controlled by the power-off control signal to be turned off. By the adoption of the intelligent door lock system, the power supply circuit of the household appliances can be automatic opened after the user leaves and the door is reversely locked, waste of electric energy is avoided, and electricity utilization safety is guaranteed.

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.

The invention discloses an alternating-direct current power supply system for variable frequency equipment and a variable frequency air conditioner. The alternating-direct current power supply system comprises direct current power supply wiring terminals, alternating current power supply wiring terminals, a direct current sampling circuit and a controller; the alternating current power supply wiring terminals are connected with a direct current bus voltage input end of a first inversion unit through a first rectifier bridge; the direct current power supply wiring terminals are connected with the direct current bus voltage input end of the first inversion unit sequentially through a second inversion unit, an isolation transformer and a second rectifier bridge; and the direct current sampling circuit acquires direct current voltage input by the direct current power supply wiring terminals and outputs to the controller through the direct current isolation transformer. Since the alternating-direct current power supply system is designed, the variable frequency equipment such as the variable frequency air conditioner can be directly powered by an alternating current mains supply and a public direct current power grid or direct current energy generated by renewable energy sources; the working requirements of long-term continuous operation of the variable frequency equipment can be met; and the variable frequency equipment is greener and more environment-friendly.