28results about How to "Reduce load rate" patented technology

The invention discloses a junction temperature estimation method and device for a power semiconductor and a vehicle, and the method comprises the steps: obtaining the loss, temperature rise data and environment temperature of the power semiconductor in an electric period, the temperature rise data comprises temperature rise values of the temperatures of the power semiconductor under different operation conditions relative to the environment temperature; determining thermal impedance according to the loss and temperature rise data; and determining the junction temperature according to the loss, the thermal impedance and the environment temperature. According to the method, the load rate of the vehicle-mounted software can be reduced, additional hardware does not need to be added, so that test resources are simple, the accuracy is high, the practicability is high, the junction temperature calculation efficiency is improved, and the calculation time is saved.

The invention discloses a string type network energy storage converter control method, and the method comprises the steps: enabling an energy storage converter to take an SOC mean value as the feedback of an SOC equalization ring, and obtaining an SOC equalization ring output value; superposing the output value of the secondary frequency modulation ring, the output value of the SOC equalization ring and the output value of the primary frequency modulation ring as an active given value, and obtaining a reference value of the frequency through a VSG active frequency control ring; taking the output value of the secondary voltage regulating ring as a reactive given value, obtaining a reference value of a VSG reactive amplitude control ring through the primary voltage regulating ring, and obtaining a reference value of voltage through the amplitude control ring; inputting the obtained reference value of the frequency and the reference value of the voltage into a voltage and current double closed loop to obtain an output signal for following the reference values, and further generating a driving signal for controlling a switching tube of the energy storage converter; according to the invention, the communication load rate can be reduced, when large frequency and voltage fluctuation occurs, the voltage and frequency stability problem can be independently solved, the self-recovery control of secondary regulation is realized, and the frequency and the output voltage of the system are dynamically regulated in real time.

The invention provides a method for orderly charging regulation and control of a charging pile area and computing equipment, and is applied to the technical field of electric power. The method comprises the steps that charging data and transformer gateway data of charging piles connected into a transformer area are acquired in real time through a transformer area intelligent fusion terminal, and the transformer gateway data comprise a distribution transformer load rate; charging pile parameters and overall parameters are set, the charging pile parameters comprise the number of charging pile regulation and control gears and the minimum regulation and control period of the charging pile, and the overall parameters comprise a load rate out-of-limit reduction threshold value and a load rate out-of-limit recovery threshold value; and monitoring and judging the distribution transformer load rate, and executing a corresponding power strategy in real time according to a monitoring and judging result. By utilizing the method, the safety and the stability of the power grid can be obviously improved, and the utilization of electric power resources is optimized.

The invention relates to the technical field of power electronics, and discloses a hybrid device driving circuit, system and control method.The hybrid device driving circuit comprises a DSP module, an FPGA module, a hybrid device driving module and a mode switching comparison module, and the mode switching comparison module obtains a real-time voltage signal on a load; comparing the real-time voltage signal with a preset reference voltage of each modulation mode, and outputting a mode switching signal; the FPGA module determines a target modulation mode of a PWM signal output by the DSP module based on the mode switching signal, and processes the PWM signal into a target PWM signal corresponding to the target modulation mode; and the hybrid device driving module respectively controls the on and off of the IGBT and the SIC MOS tube based on the target PWM signal, and adjusts the real-time voltage signal under the action of the on and off of the IGBT and the SIC MOS tube so as to drive the load. The problems that an existing hybrid device driving circuit is low in precision and large in loss in control over a delay switch of a switching device are solved.

The invention discloses a vehicle electronic and electric appliance framework based on new energy domain control and a fusion control method, and relates to the technical field of automobile electronics. The vehicle body domain controller is mounted under the vehicle body CAN bus, the new energy domain controller is mounted under the power CAN bus, the chassis domain independent controllers are mounted under the chassis CAN bus, the information entertainment domain controller is mounted under the information CAN bus, and the central security gateway supports multiple paths of CAN or CANFD buses. The new energy domain controller integrates high-voltage domain control and low-voltage domain control; the high-voltage domain controller comprises a battery management system BMS, a battery power distribution unit BDU, a high-voltage power distribution unit PDU, a steering oil pump controller DCAC, a brake air pump controller DCAC and a high-voltage-to-low-voltage module DCDC. According to the invention, new energy related components and systems can be integrated to the maximum extent, and the communication reliability is improved.

The utility model discloses a hybrid CAN network topological structure based on a mining dump truck, which belongs to the technical field of extended-range hybrid dump trucks, and comprises a first CAN network, a second CAN network, a third CAN network, a fourth CAN network, a fifth CAN network and a sixth CAN network, the second CAN network comprises a second CAN bus and at least two driving motor controllers which are connected to the second CAN bus; the vehicle control unit VCU is respectively connected to the first CAN bus and the second CAN bus and is used for realizing data interaction; according to the utility model, the range extender controller and the driving motor controller are separately connected to two different CAN networks, so that the power generation and power control of the whole vehicle are separately controlled, the load rate of the CAN bus is reduced, the stability of the vehicle system is improved, and the stability of data interaction is guaranteed by using the central communication of the VCU vehicle control unit.

The invention discloses an optimization method for realizing small-period transmission of a CAN (Controller Area Network) message. The optimization method comprises the following steps: respectively setting a corresponding configuration message for each frame of message in the CAN message; wherein the values of the data fields of the configuration message corresponding to each frame of message in the CAN message are different; when the CAN message is sent each time, whether each frame of message in the CAN message is sent or not is judged according to the value of the data field of the input configuration message; wherein if the value of the data field of the input configuration message is the same as the value of the data field of the configuration message corresponding to a certain frame of message in the CAN message, the frame of message is sent according to a set period; otherwise, not sending the frame message.

The invention discloses an unmanned aerial vehicle remote identification signal acquisition implementation method, and belongs to the technical field of unmanned aerial vehicles. According to the realization method of the unmanned aerial vehicle remote identification signal acquisition, a data identification module, a central control module, a parameter adjustment module, a single-chip microcomputer controller module and a serial port server module are included, and generated new signal parameters are identified to the unmanned aerial vehicle through a signal acquisition technology. New signal parameters are generated through a point-to-point communication mechanism between the nodes and distributed to each intelligent node in the system, and when each intelligent node receives the new signal parameters, a parameter integration module controls each node to be responsible for optimization of local parameters, so that each node can be responsible for optimization of the local parameters, and the optimization of the local parameters is facilitated. Therefore, the parallelism and adaptability of the system can be improved, the dependence on the central control unit can be reduced, the load rate of the parameter adjusting system can be reduced, and meanwhile the working efficiency of the parameter adjusting system can be improved.

The invention discloses a switching tube driving signal generation method, a co-processing module, a motor controller and a storage medium, relates to the technical field of motor controllers, and discloses a switching tube driving signal generation method comprising the following steps: a main channel sequencer determines common data after receiving an interrupt signal sent by a main processing module; the main channel sequencer triggers each co-channel sequencer to operate, and sends the public data to each co-channel sequencer; each co-channel sequencer determines a corresponding register value according to the common data and a first pulse signal parameter in a corresponding shared memory; and each co-channel sequencer writes the corresponding register value into the register so as to complete the generation of the driving signal of the switch tube, reduce the load rate of the main control module and improve the generation efficiency of the driving signal of the switch tube.

The invention discloses a wheel speed determination method. The method comprises the steps that a current signal generated by a wheel speed sensor of a vehicle based on wheel rotation is converted into a voltage pulse signal; collecting timestamp information and edge state information of the voltage pulse signal; based on the timestamp information and the edge state information, determining the edge number and timestamp change information of the voltage pulse signal in a preset calculation time period; and calculating the wheel speed of the vehicle based on the edge number and the timestamp change information. The invention further discloses a system and a vehicle applying the method.

The invention discloses a pedal displacement signal analysis method. The method comprises the steps that a PWM square wave signal generated by a pedal displacement sensor of a vehicle based on brake pedal travel information is obtained; collecting timestamp information and edge state information of the PWM square wave signal; calculating the duty ratio and the frequency of the PWM square wave signal based on the timestamp information and the edge state information; and the pedal opening degree is determined based on the duty ratio, and whether the pedal displacement sensor is in a normal working state or not is determined based on the frequency. The invention further discloses a system and a vehicle applying the method.

The invention discloses a cobalt-yttrium bimetal oxide / nitride electro-catalytic material, a preparation method thereof and application of the cobalt-yttrium bimetal oxide / nitride electro-catalytic material in hydrogen and oxygen production through water electrolysis. The preparation method comprises the following steps: 1, carrying out hydrophilic modification treatment on the carbon fiber cloth by using dielectric barrier discharge plasma; and 2, adding the carbon fiber cloth treated in the step 1 into a mixed solution containing cobalt nitrate (II), yttrium nitrate (III), ammonium fluoride and urea, and carrying out a hydrothermal reaction in a high-pressure reaction kettle to obtain the Y2O3 / YN-Co3O4 cobalt-yttrium bimetal oxide / nitride electro-catalytic material. In the Y2O3 / YN-Co3O4 cobalt yttrium bimetallic oxide / nitride electro-catalytic material, Y2O3 / YN-Co3O4 cobalt yttrium bimetallic oxide / nitride has a polyhedral micro-nano particle structure. The cobalt-yttrium bimetal oxide / nitride catalyst disclosed by the invention has excellent electrochemical stability and relatively low production cost, and the long-term use performance and stability of an electrode material are remarkably improved.

The invention discloses a method for effectively reducing the transmission and communication load rate of multichannel acquisition data. Comprising the steps that a data monitoring module processes data collected in the same period and packages the data into a data packet; transmitting the data packet to a management system through a network; the management system decodes the received data packet and performs back calculation processing to obtain original acquisition data; wherein the data packaging comprises the following steps of: obtaining an extreme value of each type of collected data in the same period; respectively calculating a difference value between each piece of data in the same kind of data and the extreme value; the extreme values and the difference values are packaged into a plurality of data packets, the first M bytes of at least one data packet in each type of data are used for filling the extreme values, the other bytes are used for filling the difference values, and M is smaller than or equal to the number of bytes of the data packets. According to the method and the device, the number of bytes required in the transmission process is reduced in a mode of transmitting the'extreme value 'and the'difference value' of the same type of acquired data, so that the load rate during communication is reduced, the network pressure is relieved, and the communication stability is improved.

The invention relates to a message sending method and device, a storage medium and a product, and relates to the technical field of communication. The message sending method comprises the steps that the period of a plurality of messages to be sent by a communication node is determined, and the communication node carries out communication based on a controller area network (CAN) bus; on the basis of the periods of the multiple messages, the delay sending duration of each message in the multiple messages is determined, and for each message, the delay sending duration of the message is in positive correlation with the duration of the period of the message; and sending a plurality of messages on the communication node according to the period and the delay sending duration of each message.

The invention discloses an intelligent prediction system based on statistical learning resource optimization, and relates to the technical field of learning resource optimization, and the system comprises a big data absorption module for absorbing an external data source, a data warehouse module for storing all types of data used by the system, and an analysis prediction algorithm model library module for storing an algorithm model. And the analysis and prediction module is used for customizing the model. According to the intelligent prediction system based on statistical learning resource optimization, through arrangement of a plurality of data storage engines in the data warehouse module, data access service can be provided for all data in a storage facility in a file form, the resource recovery time in redundant storage and frequent iterative calculation is shortened, the operation efficiency is improved, and the data storage efficiency is improved. And uniform resource management of each computing framework can be realized, uniform resource allocation and scheduling are provided for the big data absorption module, conflicts among resource allocation are avoided, and simultaneous operation of multiple computing frameworks is supported without conflicts.

The application belongs to the technical field of beam pumping unit, in particular to a power unit of beam pumping unit, which comprises a main reducer, an auxiliary reducer, a permanent magnet synchronous motor and a motor frequency converter controller, the auxiliary reducer comprises an auxiliary reducer driven large gear and an auxiliary reducer driving small gear which are engaged with each other, the auxiliary reducer driven large gear is installed on the input shaft of the main reducer, and the auxiliary reducer driving small gear is installed on the motor shaft of the permanent magnet synchronous motor; the auxiliary reducer driven large gear comprises a hub, a gear ring and a plurality of shock absorbing springs, the gear ring is sleeved on the hub and is in clearance fit, a plurality of rectangular slots are uniformly distributed in the circumferential direction at the contact position of the hub and the gear, and the shock absorbing springs are installed in the rectangular slots in a compressed state; the auxiliary reducer driven large gear and the auxiliary reducer driving small gear are both herringbone gears. The application has high transmission efficiency, high reliability, continuous adjustable pumping unit stroke, and can meet the needs of matching with full series of beam pumping units.

The invention discloses a vehicle-mounted CAN bus message authentication method based on data compression and label filling. The method comprises the following steps: designing and realizing a lossless compression algorithm of a CAN bus message; the sender selects a data frame filling mode according to the compression result and the minimum authentication label length; the receiver decompresses the data packet and extracts the original information and the authentication label; and finally, the receiver recalculates the authentication label, and verifies the authenticity and integrity of the data packet by comparing whether the extracted label is consistent with the recalculated label. According to the method, the thought of combining lossless compression and message authentication codes is adopted, and a new scheme for enhancing network security is provided for the vehicle-mounted CAN network of the intelligent networked automobile.

According to the MOSFET thermal protection method based on current and time integration, a group of current and time relations are obtained in an offline calibration mode; the working time of different segments can be realized by setting a plurality of counters, each counter is respectively mapped to different current intervals, the formula of the counter is J = summa 0Pdt = summa 0I2Rdt, and the counter is used as table look-up input to obtain a target sustainable working current; comparing the obtained target current with an actual working phase current, and if the actual current is greater than a sustainable working current value, progressively decreasing the torque according to a preset gradient until the torque is 0; if the actual current is smaller than the sustainable working current value, the torque is progressively increased according to the preset gradient until the torque is equal to the torque instruction. The method is simple and convenient to implement, avoids complex operation, reduces the load rate of the MCU execution cycle, does not need simulation, is completely completed through rack calibration data, is high in estimation precision, and effectively prevents the MOSFET from being damaged.

The application discloses a catalytic cracking dry gas recovery process, comprising the following steps: step one, using a one-stage pressure swing adsorption method to separate catalytic cracking dry gas to obtain hydrogen-rich gas and carbon two concentration gas; step two, sequentially performing deoxygenation treatment, decarburization treatment, drying treatment, arsenic removal treatment and mercury removal treatment on the carbon two concentration gas to obtain ethylene raw gas; and step three, feeding the ethylene raw gas into an ethylene device for treatment. The application has the beneficial effects of significantly shortening a recovery process flow, reducing equipment and investment, and reducing operation energy consumption and operation cost. The application also discloses a catalytic cracking dry gas recovery system, comprising a plurality of pressure swing adsorption towers, a compressor, a steam heater, at least two deoxygenation reactors, a heat exchanger, a decarburization unit, at least two dryers, a dearsenic and demercuration reactor, an ethylene device and a hydrogen production device. The system has the beneficial effects of less equipment investment, small land occupation and low energy consumption.

A phosphorus-containing dopamine flame retardant and its preparation method and application of the present invention belong to the technical field of flame retardants. The technical scheme is: a protective group is connected to a dopamine catechol group through a nucleophilic reaction; a phosphorus-containing compound is connected to the amino group of protected DA-R through a grafting reaction; finally, the protective group is removed to obtain a new type of phosphorus-containing dopamine flame retardant. The reaction process uses an organic solvent as a reaction solvent, and the reaction is carried out in a reactor through a solution reaction, and the reaction temperature is room temperature. The beneficial effects of the present invention are: this type of flame retardant retains the catechol group of DA itself, and can be self-oxidatively polymerized on a variety of substrates to produce a flame-retardant nano-coating, which is particularly suitable for open-porous materials with a large specific surface area such as flexible polyurethane, and has a significant flame retardant effect.

The application discloses a raw material pretreatment feeding device for an alkylation reaction, which comprises a heavy C4 storage tank, a light C4 storage tank, a heavy C4 conveying pump, a light C4 conveying pump, a first digital flow meter and a second digital flow meter. The discharge port of the heavy C4 storage tank is connected with a first pipe, and the first digital flow meter and the heavy C4 conveying pump are arranged on the connecting pipeline at intervals. The discharge port of the light C4 storage tank is connected with the feeding port pipeline of a hydrogenation reactor, and the light C4 conveying pump and the second digital flow meter are arranged on the connecting pipeline at intervals. The device can effectively ensure the stable product quality, reduce the load rate of a butane supplement assembly, avoid frequent load increase and decrease or start and stop of the butane supplement assembly, reduce the comprehensive energy consumption of the alkylation device, and avoid catalyst poisoning and deactivation in the hydrogenation reactor for alkylation raw material pretreatment.

The utility model relates to a Z-axis movement driving structure of a vertical machine tool, which comprises a mounting bottom plate, a spindle mounting seat, an electric spindle, a driving motor, a Z-direction guide rail and a balance cylinder, the Z-direction guide rail is fixed on the mounting bottom plate, and the spindle mounting seat is slidably mounted on the Z-direction guide rail and can move up and down along the Z-direction guide rail under the action of the driving motor. The driving motor is mounted on the mounting bottom plate; the electric main shaft is mounted on the main shaft mounting seat; the two balance cylinders are arranged on the two sides of the motorized spindle respectively, cylinder bodies of the balance cylinders are connected with the mounting bottom plate, and cylinder rods are connected with the spindle mounting seat; positive pressure air is introduced into the balance air cylinder to provide upward pulling force. The balance cylinder is arranged on the Z-axis moving structure, so that the load rate of the Z-axis linear motor during Z-axis reciprocating motion is effectively reduced, a reverse gap is eliminated, and the machining precision of a machine tool can be effectively ensured.

The invention discloses a vehicle-mounted service scheduling system and a vehicle-mounted service scheduling method. The method relates to the field of vehicle-mounted communication or other related fields, and comprises a service discovery module used for determining vehicle-mounted services operated by a first micro-control unit in vehicle-mounted software, obtaining M vehicle-mounted services and obtaining load rate data of the first micro-control unit, sending the service information and the load rate data of the M vehicle-mounted services to a service scheduling module and a service management module; and the service scheduling module is used for determining service weight data of each vehicle-mounted service under the condition that the M pieces of service information and the load rate data are received, determining N to-be-scheduled services according to the M pieces of service weight data and the load rate data, and scheduling the N to-be-scheduled services to K second micro-control units in the vehicle-mounted software. Through the vehicle-mounted service processing method and device, the problem that the operation efficiency is low when the vehicle-mounted service in the micro-control unit is operated due to the fact that the load rate of the micro-control unit is too high in the related technology is solved.

The invention discloses a task processing method and system and a motor controller, and relates to the technical field of motor controllers, and the task processing method comprises the steps that a to-be-processed task sent by a main processing module is acquired; decomposing the to-be-processed task into a plurality of sub-tasks, and distributing each sub-task to a corresponding co-channel sequencer for parallel processing; and the processing module is used for receiving processing results of the sub-tasks by the co-channel sequencers, summarizing the processing results of the sub-tasks and feeding back the summarized processing results to the main processing module, so that the task processing efficiency is improved.

The present application discloses a control method, control device and control equipment for an energy storage system, which relates to the technical field of drilling platforms and is used for offline power grids. The energy storage system includes an energy storage inverter, a battery cluster and a diesel generator set. The battery cluster discharges to the offline power grid through the energy storage inverter, and the diesel generator set charges the battery cluster through the energy storage inverter. The method includes: obtaining the state of charge SOC of the battery cluster and the load rate of the diesel generator set; controlling the energy storage inverter to work according to the state of charge SOC and the load rate, so as to charge, discharge or control the energy storage inverter to standby. By cooperating with the diesel generator set, the energy storage inverter and the battery cluster, and utilizing the fast response and high power quality characteristics of the battery cluster, according to the load rate and control logic of the diesel generator set, the shortcomings of the diesel generator set can be effectively compensated, the working efficiency of the diesel generator can be improved, and fuel consumption can be reduced.

This invention discloses a control method and system for the working mode of batteries in a battery swapping station. The battery swapping station includes an in-station monitoring platform and several sets of corresponding chargers and charging compartments. Each charger in each set is communicatively connected to the battery pack installed in the charging compartment. The in-station monitoring platform is also communicatively connected to each charger. The control method includes the following steps: the in-station monitoring platform sends a power-on command to the corresponding charger; upon receiving the power-on command, the charger controls the battery pack in the corresponding charging compartment to be powered on at low voltage; the in-station monitoring platform responds to the charging start command by sending a first message to the charger; upon receiving the first message, the charger forwards the first message to the battery pack in the corresponding charging compartment; and upon receiving the first message, the battery pack enters the battery swapping station charging mode. This invention simplifies the structural design of the battery swapping station, reduces costs, and ensures good DC charging of the batteries within the station.

The invention relates to a fault diagnosis method and device, a diagnostic apparatus and a readable storage medium. The fault diagnosis method comprises the steps of obtaining a load rate of a target communication network segment to which a to-be-diagnosed controller in a to-be-tested vehicle belongs; under the condition that the load rate is greater than a set threshold value, carrying out message sending limitation on at least part of target controllers except the to-be-detected controller in the target communication network segment; and performing fault diagnosis on the to-be-diagnosed controller. By adopting the method, the load of the target communication network segment can be reduced, and the effectiveness and the accuracy of a fault diagnosis result are further improved.

The invention discloses a battery electric vehicle low-voltage storage battery charging system and a control method thereof. The battery electric vehicle low-voltage storage battery charging system comprises a first voltage detection unit, a second voltage detection unit, a rear module, a battery management system, a domain controller, a power battery, a DC / DC module and a low-voltage storage battery. The detection end of the first voltage detection unit is connected with a normalizing power supply of the pure electric vehicle, and the output end is connected with the rear module; the detection end of the second voltage detection unit is connected with a normalizing power supply of the pure electric vehicle, and the output end is connected with the domain controller; the input end of the battery management system is connected with the rear module, and the output end is connected with the domain controller; the power battery is sequentially connected with the DC / DC module and the low-voltage storage battery The output end of the domain controller is connected with the DC / DC module; wherein the rear module and the domain controller are original configurations on the pure electric vehicle. Compared with the prior art, the low-voltage storage battery is automatically charged by directly utilizing the rear module and the domain controller which are originally configured on the whole vehicle, so that the low-voltage storage battery is prevented from being lack of electricity, the existing resources are reasonably utilized, and the cost is saved.