36results about How to "Avoid serious problems with fever" patented technology

The invention belongs to the technical field of frequency converters and provides a four-quadrant frequency converter. According to the four-quadrant frequency converter, a frequency converter is arranged between a power grid and an induction motor; an energy feedback unit is arranged at a direct current (DC) busbar side of the frequency converter; a negative pole end DC- of a direct current busbar on the frequency converter is electrically connected with the DC- of the energy feedback unit; the DC+ on the frequency converter is electrically connected with DC+ of the energy feedback unit; three-phase alternating current output of the energy feedback unit is connected to input sides R, S and T of the frequency converter in parallel; a PE (Protecting Earthing) terminal of the energy feedback unit is reliably connected to the ground; when the busbar voltage of the frequency converter is detected by the energy feedback unit to be up to a set valve, feedback electric energy is converted to power frequency and transferred to the power grid to carry out energy saving regulation. The four-quadrant frequency converter provided by the invention has the advantages that through an external energy feedback device, the electric energy produced by the motor is added to the input end to the frequency converter after feedback and an electric reactor is additionally arranged to avoid the harmonic pollution, so that the power factor is greatly improved and the efficient utilization ratio of the electric energy is realized.

The embodiments of the invention disclose a mobile terminal and a charging method. The mobile terminal comprises a charging interface, a switching control switch, a charging chip and a processor; whena preset parameter is not within a direct charging threshold range, the processor is used for controlling the switching control switch to cut off a direct charging closed circuit and starting the charging chip to perform chip charging on a battery; and when the preset parameter is within the direct charging threshold range, the processor is used for controlling the switching control switch to turn on the direct charging closed circuit, obtaining direct charging current according to the input current of the switching control switch, the output voltage of a charger and the input voltage of theswitching control switch, so as to enable the charger to perform direct charging on the battery according to the direct charging current. With the mobile terminal and the charging method of the invention adopted, a charging mode can be switched according to the preset parameter, and therefore, the temperature rise of the mobile terminal during a charging process can be reduced; the loss of a charging line can be decreased; the problem of serious heat emission of the charging line can be avoided; and safety hidden hazards caused by the heat emission of the charging line can be avoided.

The invention provides a refrigerator control method and device, a storage medium and a refrigerator. The method comprises the following steps: when the refrigerator is powered on to run, judging whether environment temperature and / or compartment temperature of the refrigerator meet / meets a first pre-set condition or not, wherein compartments comprise a refrigerating chamber, a freezing chamber and / or a temperature-variable chamber; if judging that the environment temperature and / or the compartment temperature meet / meets the first pre-set condition, controlling the refrigerator to run according to a first pre-set mode; and if judging that the environment temperature and / or the compartment temperature do / does not meet the pre-set condition, controlling the refrigerator to run according to asecond pre-set mode. According to the scheme provided by the invention, the problems that the temperature of modules is too high and a box body produces a lot of heat, caused by the fact that the refrigerator is powered on for the first time or is powered on again after being powered off for a period of time and a compressor is continuously run at high temperature can be avoided.

The invention provides a method, device and system for controlling an electric vehicle. The method comprises the steps of acquiring rotation angle information of a rotating handle included in the electric vehicle and rotation speed information of a motor included in the electric vehicle when it is determined that the electric vehicle runs in a non-low-gear mode; determining whether or not input current of the motor reaches a first preset current threshold value according to the rotation angle information of the rotating handle; if yes, determining whether the rotation speed information of themotor reaches a preset rotation speed threshold value; if yes, controlling the motor to stop rotating. According to the provided method, device and system for controlling the electric vehicle, a serious heat generation problem, caused by selecting an existing non-low-gear mode for driving, of the motor is solved, the service life of the motor is prolonged, and the practicability is higher.

Embodiments of the present application provide a charging control apparatus and method, and an electronic device, the charging control apparatus is applied to an electronic device, and includes a first charging unit, a second charging unit, and a detection module. The charging control apparatus is used for acquiring the first charging voltage, the second charging voltage, and the state informationof the battery unit when the electronic device is in a charging state. A charging management module is connected with the first charging unit, second charging unit and detection module, and is used for adjusting a first charging current of the first charging unit and a second charging current of the second charging unit to charge the battery unit according to the state information, and the firstcharging voltage and the second charging voltage, a first charging apparatus and the second charging apparatus can be accessed at the same time to charge the battery unit, thereby improving the charging efficiency.

The invention relates to a charging circuit, a charging chip, a mobile terminal and a charging system. The charging circuit comprises a first transistor, a second transistor and a control circuit. Thecontrol electrode of the first transistor is connected with a preset voltage end, a first electrode of the first transistor is connected with an energy storage device of equipment to be charged, anda second electrode of the first transistor is connected with a second electrode of the second transistor; the control electrode of the second transistor is connected with the control circuit, and thefirst electrode of the second transistor is connected with power supply equipment; the control circuit is used for controlling the working state of the second transistor; and when the first transistorand / or the second transistor are / is in a cut-off state, the difference value between the voltage of the preset voltage end and the maximum voltage when the energy storage device is fully charged is smaller than a preset threshold value. According to the embodiment of the invention, the electromigration phenomenon in the two transistors when charging is not carried out can be avoided, and the problem that the charging circuit generates heat seriously when charging is carried out is further avoided.

The invention provides a rotary transformer excitation system and a short circuit protection circuit and method thereof, and is used for detecting whether a short-circuit fault occurs in the rotary transformer excitation system or not. When a short-circuit fault occurs in the rotary transformer excitation system, an excitation power amplification circuit in the rotary transformer excitation systemis controlled to stop outputting excitation signals, and the output current of the system is pulled down to be close to zero, and the problem that the heating is serious due to heavy current flowingby the device is avoided. Meanwhile, a fault state feedback signal is output to a controller of the rotary transformer excitation system, so that the controller stops outputting the initial excitationsignals and enters a protection state.

The invention discloses raphite electrode device for preparing graphene by stripping graphite through electrochemical method. The graphite electrode device comprises graphite and a conductive clamp, the conductive clamp is provided with a first metal clamping piece and a second metal clamping piece, and the edge of the graphite is clamped between the first metal clamping piece and the second metalclamping piece. The first metal clamping piece extends outwards from one side covering the edge part of the graphite to form a strip-shaped conductive tab, the conductive tab is clamped by an insulating plate, the outward end parts of the conductive tab and the insulating tab are provided with semicircular holes which are consistent in direction and have the same radius as the diameter of a conductive bus, and the semicircular hole parts of the conductive tab extend out of the insulating plate; a filter bag film wrapped with graphite is arranged outside the graphite, and the electrode deviceis connected with the conductive bus in a hanging manner and is fixed on the bus. The device is low in cost, and the obtained graphene is good in quality and high in controllability.

The invention relates to the technical field of electronics, and discloses a terminal, a charger, a charging system and a charging method. The terminal comprises a power management circuit, a controlcircuit and a battery, wherein the control circuit and the battery are electrically connected with the power management circuit; the control circuit comprises an access identification pin, a data terminal and a synchronous serial interface; after the charger is inserted into the terminal, the grounding end of the terminal is connected with the grounding end of the charger, the access identification pin of the control circuit is connected with the access identification pin of the charger, the positive electrode tab of the battery is connected with the output end of the charging circuit of the charger, the synchronous serial interface of the control circuit is connected with the control end of the charging circuit of the charger, and the positive data terminals in the data terminal are connected with the negative data terminals in the data terminal. The provided terminal, charger, charging system and charging method can solve the problem that when the terminal performs large-current charging, the heating is serious.

The embodiment of the invention discloses a rapid charging system and method. The system comprises a charging wire and an electronic device. The charging wire is electrically connected between a direct-current power supply and the electronic equipment and is used for charging the electronic equipment; the charging wire comprises a charging wire body and a first charging module installed in the charging wire body. The electronic equipment comprises a rechargeable battery, a second charging module and an electronic equipment controller, the first charging module and the second charging module are electrically connected between the direct-current power supply and the rechargeable battery; and the electronic equipment controller is electrically connected with the first charging module and thesecond charging module and is used for controlling the first charging module and / or the second charging module to charge the rechargeable battery. According to the invention, rapid charging of the electronic equipment is realized, and the problem of severe internal heating of the electronic equipment during rapid charging is avoided, so that the potential charging safety risk is avoided, and the user experience of the electronic equipment is improved.

The invention provides a vehicle-mounted SiC DCDC converter, which comprises a shell, a cover body, and a reactor, a main control circuit board, a contactor circuit board and a thin film capacitor which are arranged in the shell, and also comprises at least one power device, at least one power device switching PCB, a laminated busbar, a driving circuit board and a spring vibrating needle, wherein the power device switching PCB is correspondingly arranged on the surface of the power device, pins of a grid electrode G and a source electrode S of the power device are welded with the power device switching PCB to form a first welding point, the position of the first welding point is transferred on a plane perpendicular to the pins through wiring on the power device switching PCB, the contact surface of the first welding point is enlarged through a bonding pad, and a bonding pad contact surface is formed; the laminated busbar is arranged above the power device switching PCB, and the source electrode S and a drain electrode D of the power device are welded with the laminated busbar to form a second welding point; the driving circuit board is arranged above the laminated busbar, and the driving circuit board is fixedly connected with the shell; and the tail end of the spring vibrating needle is welded on the driving circuit board and is arranged on the side, which is opposite to the laminated busbar, of the driving circuit board, and the head end with compression deformation of the spring vibrating needle is compressed by the driving circuit board and penetrates through the laminated busbar to be elastically pressed and connected to the contact surface of the bonding pad, so that elastic connection is realized.

The invention relates to an active equalization circuit of a lithium ion storage battery monomer for carrying, and belongs to the field of ground power supplies for carrying. The circuit comprises ground charging and discharging equipment, n monomer equalization modules and n battery monomers; the n battery monomers are sequentially connected in series in a positive-negative manner to form a series circuit; the positive end and the negative end of the series circuit are communicated with the ground charging and discharging equipment; the n single balancing modules are arranged and mounted on an external connecting bottom plate; the monomer equalization modules and the battery monomers are in one-to-one correspondence to form a parallel circuit; and n parallel circuits are formed. According to the invention, the problem of monomer active equalization in the charging process of multiple strings of lithium ion monomers is solved, the characteristics of frequent ground charging and discharging and short flight task work period of the lithium ion storage battery for carrying are met, and the cycle service life of the lithium ion storage battery for carrying and the flight reliability after launching are ensured.

The embodiment of the invention discloses a rapid charging system and method. The system comprises a charging wire and an electronic device. The charging wire is electrically connected between the direct-current power supply and the electronic equipment and used for charging the electronic equipment; the charging wire comprises a charging wire body, and a first charging module and a charging wirecontroller which are installed in the charging wire body. The electronic equipment comprises a rechargeable battery, a second charging module and an electronic equipment controller; wherein the firstcharging module and the second charging module are electrically connected between the direct-current power supply and the rechargeable battery; the charging wire controller is electrically connected with the first charging module; and the electronic equipment controller is electrically connected with the charging wire controller and the second charging module and is used for controlling the secondcharging module to charge the rechargeable battery and / or controlling the first charging module to charge the rechargeable battery through the charging wire controller. According to the invention, the problem of serious internal heating of the electronic equipment during quick charging is avoided, so that the potential charging safety risk is avoided, and the user experience of the electronic equipment is improved.

The invention discloses a tray supporting and fixing device which comprises a ceramic disc, a pressing block and a metal support. The ceramic disc is used for placing a tray, the pressing block is arranged on the edge of the ceramic disc and used for fixing the tray to the ceramic disc, the metal support is fixed below the ceramic disc and provided with n support arms, n is larger than or equal to3, the support arms are used for supporting the ceramic disc and fixed to a rotating shaft which achieves tray rotation, in the rotation process, the ceramic disc and the tray placed on the ceramic disc are driven to stably rotate together, and the length of a support arm of the metal support is smaller than the radius of the ceramic disc. The problem of tray waggling or lateral turning possiblycaused by electromagnetic force in induction heating is solved, radiation heat loss caused by tray heating to surrounding space can be reduced, and heating efficiency is further improved.

The invention discloses an application management method, apparatus, a terminal and a computer storage medium, which are used for solving the technical problems that the terminal heats seriously and the duration time is short caused by the wake-up of an application. The method comprises the following steps of: monitoring whether an application installed in a terminal is added to a freezing warehouse, wherein an application in the freezing library and an application outside the freezing library call an application programming interface API provided by an operating system of the terminal throughdifferent data channels; if that monitoring that first application is added to the freeze repository, switching a data channel between the first application and the API from a first data channel to asecond data channel, so as to isolate the first application from the API through the second data channel and prevent data interaction between the first application and the API so as to cause the first application to sleep in the terminal.

The invention discloses a tray supporting and fixing device which comprises a ceramic disc, a pressing block and a metal support. The ceramic disc is used for placing a tray, the pressing block is arranged on the edge of the ceramic disc and used for fixing the tray to the ceramic disc, the metal support is fixed below the ceramic disc and provided with n support arms, n is larger than or equal to3, the support arms are used for supporting the ceramic disc and fixed to a rotating shaft which achieves tray rotation, in the rotation process, the ceramic disc and the tray placed on the ceramic disc are driven to stably rotate together, and the length of a support arm of the metal support is smaller than the radius of the ceramic disc. The problem of tray waggling or lateral turning possiblycaused by electromagnetic force in induction heating is solved, radiation heat loss caused by tray heating to surrounding space can be reduced, and heating efficiency is further improved.

The invention relates to the technical field of medical instruments, in particular to boron neutron capture therapy equipment and method based on a high-energy electron accelerator, and the equipment comprises the electron accelerator which is used for accelerating input electrons and generating high-energy electrons after acceleration; the high Z conversion target is used for converting the high-energy electrons into high-energy X rays and converting the high-energy X rays into photoneutrons; the neutron slowing-down body is used for slowing down photoneutrons; and the controller is used for controlling the electron accelerator to generate high-energy electrons according to a control instruction of an operator, the electron accelerator emits the high-energy electrons to bombard the high-Z conversion target to obtain photoneutrons, the photoneutrons are moderated by the neutron moderator to generate moderated neutrons, and the moderated neutrons are used for performing irradiation treatment on the to-be-treated person. The equipment can effectively improve the stability of neutron source output in the low-boron neutron capture therapy process, and improve the therapy effect and the use experience.

The invention discloses a motor control and detection method and device, a holder and a movable platform. The movable platform comprises a cradle head used for carrying a load and a supporting mechanism used for supporting the cradle head, the cradle head comprises a cradle head component and a motor, and the motor is used for driving the cradle head component and the load to rotate around a preset axis. The motion state of the supporting mechanism is detected, and when the motion state indicates that the supporting mechanism continuously rotates in one direction, the motor is controlled to stop rotating, so that the problem of serious heating of the motor caused by continuous rotation of the supporting mechanism can be effectively avoided; and the continuous rotation of the supporting mechanism in one direction is not the movement expected by the user, so that the effect of saving electric power is achieved.