47results about How to "Reduce current size" patented technology

The invention discloses a current-inversed electric and electronic controller for a multi-axis magnetic levitation bearing. The electric and electronic controller comprises 2N winding bridge arms and a common bridge arm, wherein N is a degree-of-freedom number of the multi-axis magnetic levitation bearing; the 2N winding bridge arms are divided into N group-A winding bridge arms and N group-B winding bridge arms; a controllable switch is arranged on each winding bridge arm; two controllable switches are arranged on the common bridge arm; the current passing through each winding is controlled by changing on-off time of the controllable switch, so that electromagnetic force in the multi-axis magnetic levitation bearing is controlled. According to the electric and electronic controller disclosed by the invention, the exciting current of each winding is mutually offset at the common joint, the condition that the current of the previous common bridge arm is the sum of current of various winding bridge arms is changed, the current flowing through the controllable switches of the common bridge arm is obviously decreased, loads of switching elements are reduced, and the switching loss is reduced. Moreover, with the adoption of the structure of the common bridge arm, the quantity of electron devices is reduced to a certain degree, the cost is reduced, and the electric and electronic controller has the excellent actual application value.

The invention discloses a switching value acquisition insulating circuit.The switching value acquisition insulating circuit comprises a reverse protection unit, a current fixing unit, a voltage measurement unit and a photoelectric insulation unit, wherein a switching value signal is input into the reverse protection unit which is connected with the current fixing unit, a circuit is not damaged under the protection of the reverse protection unit after the switching value signal input and the ground are reversely connected, and the current fixing unit fixes the input current of a circuit after meeting a voltage opening condition. The voltage measurement unit is connected with the current fixing unit and controls the threshold voltage so as to reach a voltage signal condition for opening the circuit. The photoelectric insulation unit is connected with the voltage measurement unit and insulates an external input signal and an internal control signal so as to avoid the interference of external input signals and avoid the damage to an inner circuit caused by external fault. The invention can ensure the constancy of the input current in the acquisition process of a switching value input signals, ensures the photoelectric coupler to work reliably and has the advantages of simple circuit calculation, low power and low heating value.

The invention provides a band-gap reference voltage source circuit, belonging to the field of integrated circuits. The band-gap reference voltage source circuit comprises a current mirror path consisting of two current paths, wherein the first current path comprises a first mos (metal oxide semiconductor) tube, a second mos tube, a first resistor and a first triode which are sequentially connected in series; and the second current path comprises a third mos tube, a fourth mos tube, a second resistor, a third resistor and a second triode which are sequentially connected in series, and the source electrode of the fourth mos tube is used as a reference voltage output end. The band-gap reference voltage source circuit only has two current branches, compared with the prior art, the application of the mos tubes and the triodes is reduced, the area of the band-gap reference voltage source circuit is effective reduced, and the current size and the power consumption of the voltage source circuit are also reduced, thereby achieving an effect of lowering the circuit cost and the application cost.

The invention provides a sugar-coating removing device used for medicine detection and liftable based on magnetic force. The sugar-coating removing device comprises a base, wherein a mounting shell ismounted on the upper surface of the base; a cavity is arranged inside the mounting shell; a plurality of grinding discs are fixed on the upper surface of the mounting shell; each grinding disc is inthe shape of a screen mesh; the upper surfaces of the grinding discs are matched with the radians of tablets; the upper surfaces of the grinding discs are provided with a plurality of scrapers; the right side of the base is provided with an adsorption box; and the adsorption box is communicated with the mounting shell through a first exhaust column. The sugar-coating removing device of the invention has the following beneficial effects: the scrapers on the upper surfaces of the grinding discs can effectively remove sugar-coatings on the lower surfaces of tablets, and the sugar-coatings removedby the scrapers are conveyed into the cavity under the action of internal and external air pressure, so the scattering of the sugar-coatings is avoided; a part of sugar-coating powder is brought intothe adsorption box by a first induced draft fan and adsorbed by water; and the function of removing sugar-coatings on a plurality of tablets at a time is realized through gear transmission, so removal efficiency is greatly improved.

The invention discloses a novel lamination module. The novel lamination module has the advantages that lamination module design ideas are introduced on the basis of the traditional photovoltaic modules, scribing technologies and ultrathin welding strips are applied, scribed small photovoltaic cell pieces are linked with one another by the ultrathin welding strips in the front-rear directions, front and rear cell pieces are arranged in an overlapped tile manner, and the overlap widths range from 2 mm to 4 mm; the novel lamination module is applicable to solar cells such as crystalline silicon cells, thin film cells, dye-sensitized cells and perovskite solar cells; currents of the cell pieces further can be reduced by the aid of laser scribing technologies, the scribed cell pieces are arranged in the overlapped tile manner, accordingly, the piece distances of the novel lamination module can be eliminated, the effective power generation area of the novel lamination module can be enlarged,and power of the novel lamination module can be increased; the thicknesses of overlapped regions of the cell pieces can be reduced by the aid of the ultrathin welding strips, the fragment rates of overlapped tile cell strings can be reduced, and the reliability of the novel lamination module can be improved; the novel lamination module is compatible with merits of lamination technologies, research and development thoughts can be expanded, research spaces can be enhanced, and the development potential of the novel lamination module can be exploited.

The invention relates to the field of electrical self-recovery equipment, and particularly relates to a two-section type over-temperature self-recovery device. The two-section type over-temperature self-recovery device comprises a first conductive part, a second conductive part, a third conductive part and a fourth conductive part, wherein the third conductive part is made of a conductive materialof which the temperature is in direct proportion to the resistance value and is arranged on the first conductive part, the fourth conductive part is made of a material with a large thermal expansioncoefficient and is arranged between the third conductive part and the fourth conductive part, and the first conductive part and the second conductive part abut against each other when the fourth conductive part is in a normal state and are expanded and separated when the fourth conductive part is in a thermal expansion state. Compared with the prior art, the beneficial effects of the invention arethat the first conductive part and the second conductive part form a first conduction branch, a constant low-resistance and low-power-consumption working state is maintained, and when the temperatureis higher than a critical temperature, a second conduction branch is switched, thereby achieving a high-resistance circuit, reducing the size of a current, and facilitating the reduction of the temperature.

The invention provides an electromagnetic valve control circuit with a low-power-consumption drive function. The electromagnetic valve control circuit comprises a low-power-consumption drive device, an electromagnetic valve, an MCU and a data sensor. The electromagnetic valve control terminal is connected with the signal output terminal of the low-power-consumption drive device, the signal input terminal of the low-power-consumption drive device is connected with the MCU control signal output terminal, and the MCU data interaction terminal is connected with the data sensor signal interaction terminal. State maintenance is conducted through low voltage ten-millisecond-level delay after the electromagnetic valve is started to work, and energy consumption required in the work process is lowered.

The invention relates to the field of dynamics, noise and active control of maglev trains, in particular to an active control airfoil device and system of a maglev train. The active control airfoil device is arranged at the top of the maglev train and comprises a main airfoil and a flap connected to the rear edge of the main airfoil, the main airfoil is arranged above the top of the maglev train and can rotate relative to the top of the maglev train through a reversing assembly, and the angle between the flap and the main airfoil can be adjusted through a servo assembly. Lift compensation andresistance compensation are conducted on the maglev train based on the aerodynamic principle, specifically, a lift force is provided for an airfoil in the operation stage, and resistance is provided for airfoil turbulence in the braking stage. Compared with the prior art, the roof space of the maglev train is fully utilized, the energy consumption of a maglev system is reduced, and the braking capacity of the maglev train is improved.

The invention discloses a medium-voltage and low-voltage arc light busbar protection device set. The medium-voltage and low-voltage arc light busbar protection device set comprises a protection device and a busbar. The protection device is connected with a communication system. A single chip microcomputer is arranged inside the protection device. An over-current detection unit, an arc light detection auxiliary unit and a temperature sensor are connected to the single chip microcomputer. The over-current detection unit is connected to the busbar. An arc light sensor is connected to the arc light detection auxiliary unit and connected to the busbar. Meanwhile, a self-adjusting component is added, and the corresponding adjusting action can be made under the control of the single chip microcomputer on the certain specified condition, so that the busbar works continuously, and the probability of the arc light occurrence is remarkably lowered; in addition, the single chip microcomputer is connected with the communication system and finally connected to a mobile terminal, a mobile phone can monitor the protection device set, a worker can more conveniently master the running condition of the protection device set in real time, and damage caused by faults to the protection device set is remarkably reduced.

The invention discloses a combined type push-pull straight convertor. The convertor comprises N path push-pull normal shock convertor modules, wherein the primary side of the convertor is in parallel connection and is arranged for bypassing flow and the assistant side of the convertor is arranged for superposing outputs so as to acquire a higher output voltage. The convertor has the advantages that the stable power output can be realized under the working condition of a higher output power demand, the efficiency is high because the advantage of push-pull normal shock convertor circuit is utilized, the input current of an external power supply is divided, the current in a power switch tube is decreased, the reliability of the system is promoted, and the difficulty and the complexity for choosing the power switch tube are decreased.

A lens module consists of lens, voice coil motor and magnetic component. It is featured as forming voice coil motor by coil moving unit and magnetic iron fixing unit, using coil moving unit with elastic body to hold lens and surrounding magnetic iron fixing unit around coil moving unit.

The invention discloses a novel single Dewar high-efficiency motor structure which is composed of a stator yoke part, a stator tooth part, a dovetail key, a stator winding, a Dewar sleeve, a screwed plug, a rotor iron core, a locking gasket, a magnet exciting coil, a coil supporting piece, a coil stop block, a rotating shaft, a copper shielding block, a cooling liquid circulation pipeline, a cooler, a rotor iron core taper key, a coil supporting piece taper key and a sealing ring. According to the invention, the operation efficiency of the motor is improved, more stator windings are placed in the stator slots, the stator volume is reduced, the vacuum volume is effectively reduced, heat transfer from the stator to the rotor direction is isolated, and the assembly and later maintenance are convenient. The capacity of the required cooling liquid and the power of the cooler are effectively reduced. The whole structure is simple, the rotor core and the coil supporting piece are both of an independent structure, the rotor core and the coil supporting piece can be installed only by vertically placing the bottom feet of the rotor core and the coil supporting piece in the T-shaped grooves of the rotating shaft, and installation is convenient.

The invention provides a sensor detection circuit, a drive control circuit board, electronic equipment and an air conditioner, and the sensor detection circuit comprises a sensor, a first sampling circuit connected with the input voltage end of the sensor and used for collecting the input voltage of the sensor, a second sampling circuit connected with the output voltage end of the sensor and used for collecting the output voltage of the sensor, and a control circuit connected with the output end of the first sampling circuit and the output end of the second sampling circuit and used for outputting a detection result according to the collected output voltage of the sensor and the collected input voltage of the sensor. Compared with an existing technical scheme, the sensor detection circuit can improve the detection precision of the detection result output by the sensor; therefore, the sensor detection circuit can adapt to a use scene with a higher detection result precision requirement.

The invention provides an over-temperature protection circuit and method for an OLED lamp, and the OLED lamp. The over-temperature protection circuit comprises an OLED device and an OLED driving control panel. A thermosensitive element and a flexible circuit board are arranged in the OLED device; the thermosensitive element is arranged on the back surface of an OLED substrate of the OLED device and is used for detecting the temperature of the OLED device; the flexible circuit board is used for leading out the electric polarity of the OLED device and connecting the thermosensitive element with the OLED driving control board; the OLED driving control panel comprises a sampling circuit, a microprocessor and an OLED driving module; the sampling circuit collects the temperature detected by the thermosensitive element and sends the temperature to the microprocessor; the microprocessor generates a feedback signal according to the detected temperature and sends the feedback signal to the OLED driving module; the OLED driving module adjusts the temperature of the OLED device based on the feedback signal. According to the invention, over-temperature protection of the OLED lamp can be rapidly realized.

The invention relates to the technical field of motor driving circuits, and particularly relates to a variable open winding motor topology driving circuit and a control method thereof. The driving circuit comprises a first inverter and a second inverter, a switching tube is arranged at a direct current bus between the first inverter and the second inverter, and function switching of the three-phase inverter driving control circuit and the open winding motor driving circuit sharing the direct current bus is realized by controlling on and off of the switching tube. According to the variable open winding motor topology driving circuit and the control method thereof, the driving circuit of a topology structure is provided, and the requirements of minimum switching loss and improvement of the direct current voltage utilization rate in different states can be met according to the working condition of the motor in cooperation with different control strategies.

The invention provides an OLED light source drive control circuit and an OLED lamp. The drive control circuit comprises a DC / DC constant voltage module, an external transceiver, a first internal transceiver, a micro-processing module, a linear constant current module and an OLED screen body light source. The micro-processing module communicates with the first internal transceiver, feeds back the detected output voltage to the DC / DC constant-voltage module and controls the DC / DC constant-voltage module to work; the first internal transceiver is connected with the linear constant-current modulethrough a differential bus; the linear constant-current module comprises a plurality of linear constant-current chips, each linear constant-current chip is provided with a second internal transceiver,and differential bus interfaces of the second internal transceivers are connected to differential bus communication lines connected with the differential bus interfaces of the first internal transceivers respectively. According to the invention, the anti-interference capability is stronger, and the circuit conversion efficiency of the whole driving system is effectively improved.

A power distribution network fault intelligent self-healing switch disclosed by the present invention comprises a switch shell and a guide rail shaft, one end of the front surface of the switch shell is rotatably connected with one end of the front surface of a front plate through a hinge, the other end of the front surface of the front plate is fixedly connected with a handle, and a first main line and a second main line are arranged on two sides of the switch shell in a penetrating manner. The first main line is of two-section type design, and a first connecting plate is arranged above a fracture. By arranging a first standby line, a second standby line, an inductance coil, an electric signal amplifier and an electromagnet, a transmission line can be switched to a standby line when a power distribution network is short-circuited, and when the power distribution network is short-circuited, the current change of the main line causes the inductance coil to generate weak current, the weak current is amplified by the electric signal amplifier to supply power to the electromagnet, and the electromagnet generates magnetism to attract the first connecting plate to switch the transmission line to the standby line.

The invention relates to the technical field of computer equipment, and discloses an intelligent manufacturing computer winding displacement device which comprises a supporting frame, fixing discs arefixedly installed at the upper end and the lower end of the supporting frame, resistance grooves are formed in the surfaces of the fixing discs, and resistance strips are fixedly installed in the resistance grooves. Measuring blocks are slidably connected to the front ends of the resistor strips in the resistor grooves, pressure springs are fixedly installed at the ends, close to the edges of thefixed discs, of the measuring blocks, electromagnets are fixedly installed at the edges of the surfaces of the fixed discs, and reset springs are fixedly installed at one ends of the electromagnets.According to the intelligent manufacturing computer winding displacement device, a plurality of data cables can be arranged at the same time, the caliber of the fixing device can be adjusted so that the data cables of different types and sizes can be arranged, the overlong data cables can be wound, and the winding speed can be adjusted according to the length of the wound data cables; potential safety hazards caused by data line breakage due to too high winding speed are prevented.

The invention discloses an integrated motorcycle instrument loudspeaker box system. The integrated motorcycle instrument loudspeaker box system comprises a central processing unit, an instrument functional module, an audio and video module, a GPS module, an anti-theft alarm module, a display unit, an operation unit, a data memory module and a 3G / 4G communication module. The integrated motorcycle instrument loudspeaker box system is realized by integrating functions such as an audio and video entertainment function, an anti-theft alarm function, a GPS positioning function and an instrument function; the mounting space problem is effectively solved; and the operation convenience is improved. As each functional module is separately mounted, complicated wire harness butt-jointing can be avoided, and the anti-interference ability can be effectively improved so that the operation stability is improved. The current value of each functional module in a standby state can be effectively reduced,the situation that a motorcycle cannot be started is avoided, the aging of a battery can be effectively prevented, and the mounting cost and the use cost can be effectively reduced; through adoptionof the data memory module, file transmission with outside and file storage can be realized; and through adoption of the 3G / 4G communication module, the motorcycle can perform remote communication to realize background big data intelligent analysis and remote help seeking.

The invention relates to an over-temperature protective circuit which is suitable for being coupled with a light source driver of a light-emitting assembly. The light source driver is provided with a current setting end which is used for receiving a setting current so as to correspondingly control the current flowing through the light-emitting assembly. The over-temperature protective circuit comprises a first resistor, a second resistor, a third resistor, a thermistor and a diode, wherein the first end of the first resistor is coupled with the current setting end for supplying the setting current; the second resistor is coupled between the second end of the first resistor and a grounding voltage; the first end of the thermistor is coupled with a reference voltage and the thermistor is used for measuring the temperature of the light-emitting assembly; the third resistor is coupled between the second end of the thermistor and the grounding voltage; and the positive pole of the diode is coupled with the second end of the thermistor, and the negative pole of the diode is coupled with the second end of the first resistor.

The application discloses a method for disconnecting a fuse, which includes the following steps: sending a derating command or a shutdown command to the working unit, and the working unit executes the derating command or the shutdown command to reduce the working current; obtaining the working value of the working current, The operating value is compared with the preset value, and when the operating value is less than the preset value, a switch disconnection command is generated; according to the switch disconnection command, the user is instructed to perform a disconnection operation. Before the fuse is disconnected, the working unit of the circuit where it is located is derated or shut down, thereby reducing the current passing through the fuse and avoiding the danger of arcing caused by excessive current when the fuse is disconnected. The present application also provides a fuse breaking system.

The invention relates to the field of lithium batteries, in particular to a lithium battery positive electrode current collector and a preparation method thereof, as well as a lithium battery and its positive electrode. The positive electrode current collector includes a polymer film, an aluminum metal area is arranged on both sides of the polymer film, an aluminum metal layer is arranged on the aluminum metal area, and the area of ​​the aluminum metal layer is the area of ​​the polymer film. 40 to 70%. The lithium battery of the present application adopts the above-mentioned positive electrode current collector, which improves the energy density of the lithium metal battery, and at the same time reduces the probability of peeling off of the positive electrode active material during the charging and discharging process of the battery, thereby improving the cycle life of the battery, and further reducing the It avoids the micro-short circuit of the lithium battery and improves the safety performance of the lithium battery.

The invention provides an adjustable high-frequency vibration auxiliary electromagnetic forming device. The adjustable high-frequency vibration auxiliary electromagnetic forming device comprises a background magnetic field module, a high-frequency vibration auxiliary module and an electromagnetic forming module. The background magnetic field module provides a background magnetic field for the workpiece; the high-frequency vibration auxiliary module provides alternating current for the workpiece, so that the workpiece generates high-frequency vibration; the electromagnetic forming module is used for providing pulse large current for the workpiece to generate pulse electromagnetic force, so that the workpiece is deformed; according to the method, the service life of the coil can be effectively prolonged, the forming performance of the metal material can be effectively improved, particularly, the forming difficulty of the low-conductivity metal material is reduced, and forming control is more flexible.

The motor comprises a bottom plate and a machine body, a hollow block is fixedly arranged at the top end of the bottom plate, a movable plate is movably clamped in the hollow block, the machine body is fixedly arranged at the top end of the movable plate, an output shaft is arranged at the output end of the machine body, and a buffer mechanism is arranged between the movable plate and the bottom end of the hollow block. A junction box is fixedly arranged at the top end of the machine body, a first pipeline is fixedly arranged at the top end of the machine body, a cooling mechanism is arranged at the top end of the bottom plate, and a power mechanism is arranged on one side of the machine body. When a power supply is connected, a connector is aligned with a slot, then an insertion block is inserted into the slot, a sleeve is rotated to sleeve the outer side wall of the slot, the sleeve is rotated to move towards the left side, a third spring is extruded and compressed at the moment, the third spring extrudes the insertion block through elastic force, the insertion block is tightly attached to the inner side of the slot, and the power supply is connected. Connectivity is ensured, and poor contact of connection positions is prevented.

The invention discloses a power frequency withstand voltage detection device and method for a vacuum arc-extinguishing chamber, and the power frequency withstand voltage detection device comprises a control switch, a voltage stabilizer, a voltage regulator, a transformer, a current transformer, an overcurrent relay, and a time-delay relay. The control switch is respectively connected with the power frequency power supply and the voltage stabilizer; the voltage stabilizer is connected with the voltage regulator, the voltage regulator is connected with the transformer, and the transformer is connected with the vacuum arc-extinguishing chamber. The time-delay relay is used for prolonging a set time threshold value and then is connected with the control switch and the voltage stabilizer; the current transformer is connected in series between the voltage regulator and the transformer; the overcurrent relay detects whether the first current of the loop where the current transformer is located exceeds a set current threshold value or not; and when the first current exceeds a set current threshold, the time-delay relay is controlled to disconnect the control switch and the input end of thevoltage stabilizer. According to the technical scheme provided by the invention, the problem of large difference in power frequency withstand voltage detection of the vacuum arc-extinguishing chamberis solved.

The invention discloses a magnetic suspension motor for refrigerant conveying. The magnetic suspension motor comprises a machine shell and a rotating shaft assembly, a front end cover is installed at the front end of the machine shell, a rear end cover is installed at the rear end of the machine shell, and an automatic door is arranged on the front end cover; and a flow guide disc, a pressurizing shell, an axial displacement detection assembly for detecting the axial displacement of the rotating shaft assembly, a front magnetic bearing assembly, a stator assembly and a rear magnetic bearing assembly are sequentially installed in the machine shell from front to back. The rotating shaft assembly comprises a mandrel a, a mandrel b, a connecting sleeve and magnetic steel. The mandrel a sequentially penetrates through the flow guide disc, the pressurizing shell, the axial displacement detection assembly and the inner ring of a front bearing assembly. The magnetic suspension motor has the beneficial effects that radial displacement adjustment and axial displacement adjustment of the rotating shaft are both of a hybrid excitation structure, efficient conveying of refrigerants is guaranteed, meanwhile, energy consumption is reduced, and the occupied space is small.

The invention discloses a method for disconnecting a fuse, and the method comprises the following steps: sending a derating instruction or a shutdown instruction to a working unit, and executing the derating instruction or the shutdown instruction by the working unit to reduce working current; obtaining a working value of the working current, comparing the working value with a preset value, and generating a switch breakable instruction when the working value is less than the preset value; and indicating a user to perform disconnection operation according to the switch disconnectable instruction. Before the fuse is disconnected, derating or shutdown operation is carried out on the working unit of the circuit where the fuse is located, so the magnitude of current passing through the fuse isreduced, and the electric arc danger caused by overlarge current when the fuse is disconnected is avoided. The invention further provides a disconnection system of the fuse.

The invention discloses a protection device group for medium and low-voltage arc busbars, which includes a protection device and a busbar. The protection device is connected with a communication system. The protection device is provided with a single-chip microcomputer. The flow detection unit is connected to the bus bar, the arc light detection auxiliary unit is connected to an arc light sensor, and the arc light sensor is connected to the bus bar. At the same time, a self-adjustable component is added on this basis. Under certain circumstances, corresponding adjustment actions can be made under the control of the single-chip microcomputer, so that the busbar can continue to work and significantly reduce the probability of arc occurrence. At the same time, the single-chip microcomputer is connected to the communication system, and finally connected to the mobile phone terminal to realize the monitoring of the protection device group by the mobile phone. Damage to the device group.