2282 results about "Current electric" patented technology

The invention relates to a method and a circuit arrangement for the ageing compensation of an organic light-emitting diode (OLED) which is fed from a supply voltage and is switched by means of a driver transistor operated in saturation operation, by means of a driving of the light-emitting diode. The method comprises the following steps of: storing at least one desired current-voltage value pair of a desired current-voltage characteristic curve of the light-emitting diode; transferring the driver transistor from saturation operation to linear operation during a measurement cycle; measuring a current value for the current through the light-emitting diode by means of a current measuring circuit in the measurement cycle; determining at least one present current-voltage value pair of a present current-voltage characteristic curve of the light-emitting diode by means of the measured current value; comparing the at least one present current-voltage value pair of the light-emitting diode with the desired current-voltage value pair of the light-emitting diode; and generating driving parameters for driving the light-emitting diode in a manner dependent on the result of the comparison.

The invention relates to the technical field of electric ovens, and in particular relates to an upper heat source and movable adjusting type electric oven. For solving the technical defects that the current electric oven adopts an underneath electric heater structure so that the barbecuing effects are poor due to the smoke caused by the dropped oil and the side arrangement of the electric heater, the invention provides the upper heat source and movable adjusting type electric oven. The upper heat source and movable adjusting type electric oven comprises an electric heater, and a baking platform having a barbecuing frame, and is characterized in that the electric heater is placed above the baking platform; and a biased supporting device is arranged on the baking platform and fixedly connected with the electric heater. According to the upper heat source and movable adjusting type electric oven, the electric heater is upwards arranged above the baking platform, thus the smoke caused by the dropped oil in barbecuing is reduced; the upper electric heater can provide thermal radiation area the same as that of the current lower heat source type electric oven, so that the barbecuing effects are ensured; the upper electric heater is used for downwards heating the surfaces of foods, and the baking face can be conveniently observed, and the foods can be conveniently overturned for being barbecued.

The invention discloses an electric marketing service application system, and a construction method and platform thereof. The electric marketing service application system comprises an SaaS cloud platform, a PaaS cloud platform and an IaaS cloud platform; an electric marketing service application constructed based on a micro-service architecture is arranged on the SaaS cloud platform; the electric marketing service application comprises an interface micro-service, an API gateway and a micro-service set including multiple electric marketing micro-services; each electric marketing micro-service in the micro-service set uniquely corresponds to a corresponding basic service in electric marketing; and furthermore, any electric marketing micro-service is a micro-service, which is obtained by performing micro-service development of the corresponding basic service, wherein the architectural pattern of the micro-service architecture is an architectural pattern having the characteristics of independent development, independent testing, independent deployment and independent operation. By means of the electric marketing service application system, and the construction method and platform thereof disclosed by the invention, the fact that the electric marketing service application system can be suitable for rapid development tendency of current electric marketing services can be ensured.

The invention relates to a vehicle-mounted charging system of an electric vehicle, comprising a vehicle-mounted battery, a single / three-phase power conversion module, a direct current charging device, a charging contactor, a signal detection unit and a micro control unit (MCU), wherein the single / three-phase power conversion module, the direct current charging device, the charging contactor, the signal detection unit and the MCU are respectively connected with the vehicle-mounted battery; the direct current charging device comprises a voltage boosting module and a voltage reduction module which can charge the vehicle-mounted battery through boosting or reducing the voltage of an external direct current charging power supply; and the single / three-phase power conversion module directly multiplexes a vehicle-mounted inverter of the electric vehicle with an alternating / direct current bidirectional inversion function. In the invention, three charging modes of the electric vehicle are integrated in one vehicle-mounted charging system and are flexible and selectable, the vehicle-mounted charging system can be charged by three different charging voltages, i.e. external direct current voltage, single-phase alternating current voltage and three-phase alternating current voltage, and four alternating current charging modes can meet the diversity requirement of the charging modes of current electric vehicles; and meanwhile, the original vehicle-mounted inverter components can be multiplexed, thereby effectively reducing the cost.

This invention discloses a method and a device for selecting single-phase fault of small earth current nets, which integratedly processes multiple kinds of fault signals based on the earth situation of the non-earth and arc-extinguishing coils, applies multiple kinds of line selention criteria to constitute quantification espressions showing that a line may be a fault one to get the final line selection result by integrated judgment, the selection device has good man-machine interface and is easily operated and installed, the hardware of the device is a PCI bus industrial control mainboard, and the selection algorithm is realized by virtual instrument technology to differentiate faults of single-phase earth, breakage of voltage mutual-inductors and ferromagnetic resonance and displayed by LCD.

The embodiment of the invention discloses a determination method, a determination device and terminal equipment for charging time. The determination method for the charging time comprises the following steps: a current charging current value, a currently applied electricity consumption current value and a current battery voltage are detected, and the current electric quantity of a battery is obtained according to the current battery voltage; and the remaining time needed by finishing the charging of the battery is determined according to the current charging current value, the currently applied electricity consumption current value, the current electric quantity of the battery, total electric quantity of the battery, and the ratio between the charging electric quantities at different stages of the charging of the battery and the total electric quantity of the battery, thereby realizing the determination of the remaining time needed by finishing the charging of the battery and prompting the remaining time.

A multi-sensor data fusion early warning method for monitoring an electric transmission line tower comprises the following steps that 1) current electric transmission line parameters of detection sensors are obtained in real time; 2) first-class BP neural networks are fused; 3) second-class D-S evidence theories are fused, output of the BP neural networks is evaluated between 0 and 1 and processed to be elementary probabilities to serve as evidences of the D-S evidence theories, and danger classes are obtained. According to the second step, 2.1) fault monitoring is carried out on a single detection sensor: a BP network is adopted to construct a detection sensor output sequence predication model, and assuming n time output samples of the observed sensors as x(1), x(2), x(3),..., x (n), (n+1) time sensor output values are predicted; 2.2) the BP neural network of each detection sensor carries out time data fusion; 2.3) input signals are normalized; 2.4) fusion identification is carried out on characteristic layers. The multi-sensor data fusion early warning method is good in stability, high in reliability and good in real-time performance.

The invention discloses a whole vehicle energy management method for an internal combustion generating extend range type electric vehicle. The SOC level of a current electric vehicle storage battery is obtained according to voltage and charging and discharging current information of the two ends of the storage battery, a high SOC threshold and a low SOC threshold are set to determine the on-off state of a range extender, and excessive charging and discharging of the storage battery and frequent start and stop of the range extender are avoided. In a range extend mode, drive demanded power of the whole vehicle is obtained according to discharge voltage and current information of a drive motor and a controller of the drive motor, an economic travel line of an internal combustion engine of the range extender and the current SOC value of the storage battery serve as bases, the optimal operation condition of the range extender is reasonably determined, charging and discharging demands of the storage battery are taken into consideration, accordingly whole vehicle dynamic performance and fuel economical efficiency are guaranteed, and meanwhile the energy storage level of the storage battery is optimized.

The invention provides a household electricity intelligent management system. A sensor is used for monitoring the indoor personnel situation, the temperature, the humidity, light brightness and the like in a real-time mode. According to the acquisition of data like the temperature, whether relevant electric appliances are turned on or not is determined, and the temperature value when the relevant electric appliances run is determined. A working period of each electric appliance can also be set, before each relevant electric appliance is turned on, whether the current time is located in the working period of each electric appliance or not is preferentially judged, and if the current time is not in the working period, the electric appliances can not be turned on. According to the corresponding relation between the set electricity prices and periods, and the corresponding relation between the electricity consumption and the electricity prices, after the electricity consumption of each electric appliance is obtained, the total electricity consumption and the electricity consumption in each period are calculated, whether the total electricity consumption exceeds the preset value or not is judged, if the total electricity consumption exceeds the preset value, a prompt is sent to a user through an alarm module, the user is informed of the current electric consumption and the electric charge situation, and some electric appliances are turned off according to the preset electricity consumption weight of the electric appliances. The household electricity intelligent management system can effectively manage the household electric appliances and save electric energy when used.

The embodiment of the invention provides a method for detecting the state of health of a battery and a device thereof and a battery management system. The method comprises the steps that whether the current state of charge SOC of the battery is in the intersection interaction of a linear interval of the SOC-open circuit voltage OCV relation of the battery and a linear interval of the DC internal resistance DCIR-SOC relation is judged, and whether the present current of the battery is in the current interval corresponding to the intersection interaction is judged. The situation that the SOC of the battery is in the intersection interaction and the current I is in the current interval is determined firstly so that the pre-aging capacity of the battery and the post-aging capacity of the battery can be acquired in the charge or discharge process of the battery and thus the SOH of the battery can be accurately estimated.

The invention relates to a variable-frequency speed-regulating magnetic torque coupler which is characterized in that: the coupler comprises a shell, and an inner rotor mechanical axis and an outer rotor mechanical axis are arranged in the shell; the inner rotor mechanical axis is connected with an inner rotor which is supported on a static bearing frame of the inner rotor, and the outer rotor mechanical axis is connected with an outer rotor which is supported on the static bearing frame of the outer rotor; an electromagnetic coupling working air gap is formed between the inner rotor and the outer rotor; the outer rotor is internally provided with an armature winding which is connected with a group of three-phase static electric brushes by three drainage slipping rings; the three-phase static electric brush is connected with the output end of a frequency converter, and the input end of the frequency converter is connected with a three-phase alternating-current electric fence. As a variable-frequency speed-regulating technology is introduced in a simple electric transmission system, non-contact torque transmission and stepless speed regulation between two rotary mechanical shafts can be realized by utilizing the principle of variable-frequency motors. The variable-frequency speed-regulating magnetic torque coupler can be widely applied to transmission systems.

The invention discloses a hydraulic transmission-based method and a hydraulic transmission-based device for storing energy and realizing stabilized voltage and constant frequency in wave power generation. In the device, a floating pendulum is connected with a hydraulic cylinder, high pressure oil outputted by a non-rod cavity of the hydraulic cylinder enters a high pressure energy storing device and an oil inlet of a variable motor through a control integrated valve and through a high pressure oil tube, low pressure oil outputted by an oil outlet of the variable motor enters a low pressure big-capacity energy storing device and returns to the rod cavity of the hydraulic cylinder through the control integrated valve, the main shaft of the variable motor is connected with a permanent magnet synchronous generator, and the permanent magnet synchronous generator is connected to a rectifying module and a direct-current electric energy charging-discharging control module and then connected to a stepless unload adjustable load and a storage battery. The high pressure energy storing device and the low pressure big-capacity energy storing device realize the energy storage by absorbing the fluctuation, caused by the change of transient waves, of pressure and flow rate. A controller realizes the pressure stabilization constant frequency by the stepless unload adjustable load and the displacement of the hydraulic motor respectively. The device has the advantage of making the wave power generating device output more smoothly, more free from influence of the wave impact and have higher efficiency.

The invention discloses a route planning method and device for an unmanned aerial vehicle, and electronic equipment, and relates to the technical field of unmanned aerial vehicles. When multi-machinetasks are executed, the collision risk of the unmanned aerial vehicle can be reduced and the working efficiency of the unmanned aerial vehicle can be improved. The method comprises the following stepsof acquiring land parcel information of a to-be-operated land parcel and position information of a current take-off point of the unmanned aerial vehicle; analyzing the land parcel information to obtain track point attribute information; dividing a task needing to be executed in the to-be-operated land parcel of the unmanned aerial vehicle into at least one subtask according to the track point attribute information, the position information of the take-off point and the flight mileage of one flight of the unmanned aerial vehicle at the current electric quantity; and respectively planning routeinformation of the unmanned aerial vehicle for executing each subtask to come and go the to-be-operated land parcel correspondingly according to the position information of the take-off point. The route planning method and device for the unmanned aerial vehicle, and the electronic equipment are suitable for route planning of the unmanned aerial vehicle.

The invention provides an electric automobile capable of achieving unlimited long-distance endurance and tracked mobile charging and power supplying systems of the electric automobile. According to the technical scheme, guide rails for supplying power are laid on the two sides of a center isolating strip of a highway, the electric automobile with a brush and a navigation control device can be connected with the guide rails for charging and power supplying in the traveling process, and in this way, by means of the guide rails serving as the charging and power supplying systems, the electric automobile can achieve unlimited long-distance endurance on the highway. The method can solve the problems that a current electric automobile is limited in endurance mileage and can only travel locally for the short distance, and the cost of batteries is high, and is beneficial for the development of electric automobile industries and popularization of electric automobiles.

The invention discloses a return voyage control method and a return voyage control device of an unmanned aerial vehicle, and the unmanned aerial vehicle. The method comprises the following steps: detecting whether the current electric quantity of the unmanned aerial vehicle reaches a first electric quantity threshold value; if the current electric quantity of the unmanned aerial vehicle reaches the first electric quantity threshold value, determining the distance relation between the current position of the unmanned aerial vehicle in a set air line and a set waypoint; and according to the distance relation, controlling the unmanned aerial vehicle to continuously fly according to the set air line until a second electric quantity threshold value and then return or directly controlling the unmanned aerial vehicle to return. By the method, the effective utilization rate of the electric quantity of a battery can be increased.

The invention discloses a black-start ADM (aid in decision making) supporting / training system and a method thereof. The black-start ADM supporting / training system and the method thereof solve the problems of deficiency of effective ADM tools under the condition of blackout of the prior power system, formulation of a system recovery proposal only by experience and incapability of being suitable for the current electric network requirements, and have the advantages of simple structure, convenient use, high automation degree, capability of effectively aiding in decision making for dispatchers and so on. The invention is characterized in that: the black-start ADM supporting / training system adopts a C / S architecture and consists of a black-start console module and a black-start computing server, wherein, a black-start console is a functional module which is extended on the basis of a DTS function, provides a user interface of the black-start decision supporting system, and utilizes the DTS function to exhibit and simulate a black-start proposal for achieving the aim of training the dispatchers; the black-start computing server comprises a proposal generation module, a proposal checkout module and so on and can generate a black-start operation sequence proposal by utilization of an intelligent search algorithm according to power failure areas and quickly verify the proposal.

The invention discloses a method for estimating the remaining time of a battery, which comprises the following steps: S1, reading a reference curve of the battery, wherein the reference curve is initially generated according to the nominal capacity of the battery; S2, acquiring current battery parameters, wherein the parameters include the current voltage, the current electric current, and the discharge time; S3, judging whether the battery is in a floating, discharge or equalized charging state; S4, calculating the remaining time T of the battery in the state of floating; S5, calculating the remaining time of the battery in the state of discharge; and S6, calculating the discharge time of the battery in the state of equalized charging. The invention also discloses a method for estimating the remaining capacity of a battery. According to invention, a remaining time estimation result and a remaining capacity estimation result are coherent, and the accuracy is higher, so that while the availability is ensured, the user experience is greatly increased.

The invention discloses a copper-chromium-zirconium alloy contact wire and a production technique thereof. The copper-chromium-zirconium alloy contact wire is composed of copper, chromium, zirconium and inevitable impurity elements according to the set mass percentages. In preparation, the main technique comprises the steps of raw material preparation, up-drawing continuous casting, CONFORM continuous squeezing, primary cold machining, solution treatment, secondary cold machining, aging treatment and finished product drawing. According to the copper-chromium-zirconium alloy contact wire manufactured by the technique and materials, the matching of the contact wire raw materials is reasonably adjusted, the ratio of all element components in the contact wire is adjusted, and the special production technique is combined so that a high-strength high-conductivity contact wire product can be produced, wherein the weight of one single contact wire product is larger than two tons, the IACS electrical conductivity of the contact wire product is 75-90%, and the tensile strength of the contact wire product is 550-700 MPa; and the requirement of current electric railway high-speed development can be better met.

The invention relates to a thermoelectric conversion automotive power supply system using waste heat from automobile exhaust and a control method thereof, wherein the system is composed of an engine unit, a thermoelectric conversion unit, an output and electric energy storage unit and a detection and control unit. The system is characterized in that high temperature exhaust is discharged during the running of the engine and cooling water in a certain temperature range is provided; the heat brought by the high temperature exhaust is absorbed by hot terminals of a plurality of thermoelectric modules connected in series in the thermoelectric conversion unit, and cold terminals of the thermoelectric modules form temperature difference between the hot terminals and the cold terminals under thecooling effect of the cooling water of the automotive engine, so as to generate direct-current electric energy; the voltage and the current of the electric energy generated from the thermoelectric conversion unit are regulated by the output and electric energy storage unit, and the electric energy is used to supply on-vehicle appliances and ISG or charge the energy storage battery; the detection and control unit is used for detecting parameters, sending a control command and performing comprehensive energy management on the system. The system effectively recycles and utilizes the waste heat from the automobile exhaust, improves the economical efficiency of the fuel of the automotive engine, and is contributed to reducing the automobile exhaust emission.

The invention discloses an electric lift control reminding and fault self-diagnosing method and an electric lift control reminding and fault self-diagnosing system. In the method, the current electric lift and control system are used. The method is characterized by comprising the following steps that: an electric lift operation signal sensing system, a signal processing diagnosis unit, a voice reminding unit and an independent power supply unit which are independent of one another are arranged outside the current electric lift and control system; when the fault of an electric lift is determined by diagnosing a signal provided by the electric lift operation signal sensing system through a signal processing diagnosis output control unit, the signal processing diagnosis unit sends a fault content signal out; the voice reminding unit informs passengers in a lift car of an electric lift fault content through voice and sends help information out to personnel outside the lift car; and the independent power supply unit provides required power for the system when the fault occurs. By the method and the system, the operation condition of the electric lift can be detected in real time, and the passengers can be guided to use the electric lift and can be directed or placated under the abnormal operation condition of the electric lift, so that equipment damages and personal injuries due topanic and aggressive behaviors of the passengers can be prevented.

The invention discloses an application program-oriented method and an application program-oriented system for indicating the use time of an intelligent mobile phone battery, and belongs to the field of embedded system application software. The method comprises the following steps of: I, sampling each application on the mobile phone and calculating battery discharge rate parameters corresponding to various specific application programs; and II, according to the discharge rate parameter, forecasting the remaining use time of the battery under the condition of the continuous execution of the application program, and forecasting the sustainable execution time of other application programs appointed by a user under the condition of the current electric quantity of the battery. The system can be implemented specifically in an intelligent mobile phone operating system by the method. The method and the system indicate the remaining use time of the battery in the intelligent mobile phone, indicate the sustainable execution time of the specific application programs about which users concern, make the battery electric quantity indicating function of the intelligent mobile phone more humanistic and have good market prospect and application value.

The invention discloses a charging wire material for electric vehicles and a preparation method thereof. The charging wire material is prepared by the following steps: adding a plastic elastic soft material and white oil to a high-speed mixer and stirring so that the white oil is completely and uniformly absorbed; sequentially adding an activated halogen-free composite flame retardant, 0-20 parts of a charcoal forming agent, a smoke suppressor, an oxidant, a lubricant, a wear-resistant agent, a coupling agent and a bulking agent to the high-speed mixer and mixing; transferring mixed materials to a reactant twin-screw extruder hopper, and implementing melt-blending, extrusion and granulation at processing temperature of 150-250 DEG C to obtain a product. The fire-resistant wire composite material prepared by the invention has the advantages of being halogen-free, low in smoke, soft and easy to curl, wear resistant on surface, easy to process and form, and recyclable; the composite material can better meet using requirements of charging wire material for current electric vehicles.

The invention discloses a method for mobile terminal to update the electric quantity of a battery and the mobile terminal. The method comprises the steps that the battery voltage is collected when the mobile terminal system is started, and the original electric quantity of the battery is obtained through a pre-established voltage and electric quantity conversion table; the current battery voltage is collected to obtain the current collected electric quantity of the battery, and theoretical charging-discharging electric quantity of the battery of the mobile terminal is calculated according to a collection time interval; the collected electric quantity is compared with the original electric quantity, and whether the collected electric quantity is the real current electric quantity of the battery or not is judged in combination with the theoretical charging-discharging electric quantity; and if not, the real current electric quantity of the battery is estimated according to the theoretical charging-discharging electric quantity; and the original electric quantity is updated to the real current electric quantity of the battery and distributed to each functional module of the mobile terminal system. The method has the advantages that the real current electric quantity of the battery is accurately obtained through a battery charging-discharging pre-estimation mechanism, thereby effectively avoiding abnormal fluctuation phenomena from occurring when the electric quantity of the battery is updated by the mobile terminal.

The invention relates to a wind power plant voltage automatic control method based on a model predictive control theory, and belongs to the technical field of electric power system wind power plant voltage automatic control. The method includes the steps that various current electric quantity measured values of a system are collected and serve as initial values of various electric quantity predicted values, and an optimized control model composed of an optimized objective function and constraint conditions is established according to the predicted values; the optimized control model is simplified, the simplified optimized control model is solved through an optimization tool, and solution sequences of reactive set values of a draught fan and voltage set values of an SVG in an MPC time window are acquired; first values in the solution sequences serve as control objectives and are issued to the draught fan and the SVG respectively, and therefore wind power plant voltages are automatically controlled. The method can be integrated in the automatic voltage control system for wind power plant field operation, and the system can carry out an optimum control strategy in real time according to the power change of a wind power plant.

The invention discloses a multi-user computation unloading method and device based on a chemical reaction optimization algorithm. A computation unloading device collects real-time information of a mobile terminal and an edge server, and the real-time information comprises the CPU load, the current electric quantity, the network bandwidth and like information of the terminal and the state information of a virtual machine of the edge server, the completion time of an application and the energy consumption occupied weight of the terminal are adjusted so as to establish an application completion time model, a terminal energy consumption model and a scheduler module; according to the collected real-time information and the established model, a selection decision is worked out by adopting the multi-user computation unloading method based on the chemical reaction optimization algorithm to obtain a quasi-optimal result of an application program, thereby improving the application performance and reducing the terminal energy consumption.

The invention discloses a method and device for accurately displaying the battery electric quantity of a portable power source. The device comprises a control circuit (200), a voltage detection circuit (80), a display circuit (400) and a current detection circuit. The method comprises the steps that an initial voltage of a battery (100) is collected through the voltage detection circuit (80), the control circuit (200) calculates the initial electric quantity according to the initial voltage, the current detection circuit collects a real-time circuit in a real-time mode, and the control circuit (200) calculates the changed electric quantity in a real-time mode according to the real-time current, calculates and updates the current electric quantity in a real-time mode according to the changed electric quantity on the basis of the initial electric quantity or the backup electric quantity, meanwhile, stores the current electric quantity to be the backup electric quantity, and finally controls the display circuit (400) to display the current electric quantity in a real-time mode. According to the method and device for accurately displaying the battery electric quantity of the portable power source, the electric quantity is calculated and obtained through the voltage value, the current value and the time value, large deviation caused by the fluctuation of the voltage value of the battery is not generated, and the problem that the difference between the electric quantity values of an existing portable power source is large is solved.

The invention provides a method and device for estimating the harmonic state of an electric power system. The method includes the steps of collecting network topology information corresponding to the electric power system, collecting measuring point position information in the electric power system, collecting measuring point harmonic information in the electric power system, making network topology observability analysis and determining the observability range in the current electric power system according to the network topology information, the measuring point position information and the measuring point harmonic information, and determining a harmonic state parameter corresponding to the current electric power system according to the observability range in the current electric power system. Suspicious harmonic injection nodes are led to an observability analytic logical judgment method, the whole network analysis is achieved by the adoption of a recursive algorithm, measuring point optimal allocation is achieved according to different user needs, and the problems that the algorithm is complex, the calculated quantity is large, and the fact that a measurement device has voltage and current measuring capacity at the same time is not considered in the prior art are solved.