541results about How to "Small working current" patented technology

The invention discloses an electronic control dimming medium which comprises two substrate layers. A mixed layer is arranged between two substrate layers and is made by mixing smectic phase liquid crystal and additives. A conductive electrode layer is arranged at the sides of two substrate layers towards the mixed layer, and the conductive electrode layer is connected with a circuit drive control apparatus. Two substrate layers can be made of glass, or two substrate layers can be made of plastic, or one substrate layer is made of the glass, and the other substrate layer is made of the plastic. When an electric signal which is applied to the conductive electrode layer is controlled, smectic phase liquid crystal molecules can be characterized by different arrangement states, and the arrangement states are the same in the electroless case, so as to ensure that the medium can be switched between a vaporific shielding state and a full transparent state and even can be switched among various gradual progress states of different gray scales. The electronic control dimming medium can be widely applied to the fields of building decoration and fitment, privacy control area, automobile electronics, electronic bulletin board, etc.

The invention relates to an intelligent lithium ion battery management system for an electric vehicle. The management system is characterized in that a microcontroller module is connected with a power supply module, a data detection module, a charge-discharge control module, a safety protection module, a communication module, a data storage module and a balance management module. The balance control method comprises the following steps: carrying out balance self-inspection according to each collected single cell voltage data in a cell unit; if the balance self-inspection is successful, judging whether to start balance control; if the difference between the single cell voltage and the average value voltage is larger than a preset threshold voltage and the voltage of a certain single cell is larger than a preset threshold, carrying out balance control with PWM duty ratio obtained based on the single cell voltage being as balance time; or otherwise, giving up carrying out the balance control. The management system in the invention is a centralized battery management system, and has the advantages of small size, stable performance, high detection precision, low cost and high reliability and the like.

The invention provides an optical fiber coupling module of a platform-type turning and reflecting single-tube semiconductor laser and belongs to the technical field of laser; the optical fiber coupling module comprises a bearing platform (1), a plurality of groups of single-tube semiconductor lasers (2), a plurality of fast axis collimators (3), a plurality of slow axis collimators (4), a plurality of turning and reflecting prisms (5), an ordinary reflecting prism (7), a beam-combining prism (8), and fast / slow axis focusing lens combinations (9) and (10) and an optical fiber coupling head (12); each group of the single-tube semiconductor lasers comprises a plurality of the single-tube semiconductor lasers; each single-tube semiconductor laser corresponds to one fast axis collimator, one slow axis collimator and one turning and reflecting prism; all the optical devices are laid on the bearing platform without steps and pedestals; the light-emitting positions of the single-tube semiconductor lasers are located at the same height; the light beams emitted by the single-tube semiconductor lasers are subjected to the collimation, turning and reflection, beam-combination and focusing processes through the optical devices and finally are coupled to the optical fiber coupling head.

The present invention relates to the flow detection field, in particular to a low power consumption two-wire system vortex street flowmeter which consists of a piezoelectric transducer, a charge amplifier, a voltage amplifier, a program-controlled amplifier, a lowpass, a voltage follower, a peak detection circuit, a band-pass filter set, a multiway switch gate circuit, a wave shaping circuit, a singlechip, a man-machine interface circuit and a 4-20 mA output and power management circuit, wherein, the singlechip detects the peak value and the frequency of the vortex street signal to amplify and filter the vortex flow signals by controlling the program-controlled amplifier and the band-pass filter. The technology overcomes the problems that the prior art can not achieve low power consumption while measuring small flow, expanding measuring range rate and improving measuring precision effectively. While ensuring measuring small flow, expanding measuring range rate and improving measuring precision effectively, the invention achieves low power consumption of outputting the direct current of 4-20 mA and the operating current less than 4mA and achieves the two-wire system operation.

The invention discloses a self-excitation push-pull type converter, comprising a transformer. A closed magnetic core or iron core of the transformer is formed by a main part and a local part, wherein the local part achieves magnetic saturation earlier than the main part under excitation of the same increasing magnetic field. The converter disclosed by the invention can overcome the defects of the traditional self-excitation push-pull type converter, thus efficiency of the self-excitation push-pull type converter is obviously improved when the self-excitation push-pull type converter is in a light load state; when the self-excitation push-pull type converter is in a rated load state, the efficiency is further improved; number of windings of coils on a magnetic saturation transformer in the self-excitation push-pull type converter is reduced; working frequency of the self-excitation push-pull type converter is improved while loss is maintained to be lower; and probability that current peak is produced when the self-excitation push-pull type converter is conducted and closed is reduced, and the efficiency is further improved while output ripple is reduced.

The invention disclosed a lower wireless network card power consumption method, including: users manual configure the Ethernet card switching work mode to the depth power saving mode, or set the Ethernet card automatic switching work mode as the depth power saving mode; process mode switching, and preserve environmental information, entering from the normal working state to the depth power saving mode, and in that mode, used to wake up and restore the circuit to slow operating, and other network cards circuits is closed or suspended; when the network card need to normal work, by user manual or automatic wake-up card, exiting from the depth power saving mode and resuming the normal working condition. The invention can effectively reduce the work current of the wireless network card standby state to within 25mA, greatly enhance its practicability, and by reasonable logic design, it realizes the manual and automatic switching of several work modes, improves application flexibility and maneuverability.

The invention discloses a reflective antenna array and a beam scanning method. The reflective antenna array comprises a programmable substrate and a metamaterial surface, wherein the metamaterial surface comprises a plurality of active antenna units, and the active antenna unit comprises a metamaterial unit and an active diode connected between the metamaterial units. When the states of the active diodes are arranged differently, 0 and 1 states on the surface of the metamaterial are distributed differently, and further, plane waves are reflected to a needed radiation beam. Corresponding 0 and 1 coding arrangement can be quickly designed, corresponding active diode is quickly controlled through the programmable substrate, and the beam scanning angle and the radiation beam are controlled. In comparison with the traditional structure, a radiation beam with a needed direction angle can be realized without mechanically rotating the antenna structure, the overall size is reduced, and the flexibility is enhanced.

The invention discloses a self-excited push-pull type converter which comprises a Royer circuit. An inductor connects a power supply terminal of the Royer circuit with a center tap of a transformer primary winding in the Royer circuit. An inductance value of the inductor is less than one-tenth of an inductance value of a primary winding in the transformer. The center tap of the primary winding isa connection point of two primary windings of the transformer. The self-excited push-pull type converter of the present invention has the characteristics of high consistency, easy debugging, low technology requirement, and good short circuit protection performance.

The invention belongs to the fields of a driving device of an electric vehicle and a hybrid electric vehicle, and a control method thereof. The driving system provided by the invention comprises a brushless double-fed motor, a stator inverter, a rotor inverter, a stator / rotor winding relay control circuit, a motor driving and control module, a complete electric vehicle controller, an accumulator, a battery management unit and a current-voltage speed sensor, wherein the ports of the stator inverter and rotor inverter are respectively connected with the port of the accumulator; the port of the motor driving and control module is respectively connected with the ports of the stator inverter and rotor inverter; and the port of the motor driving and control module is connected with the port of the stator / rotor winding relay control circuit. The control method provided by the invention mainly comprises the following steps: judging the running state of a driving motor; and if the driving motor is in an asynchronous running state or a double-fed running state or the stator and rotor inverters have faults, successively and respectively executing the corresponding subprograms. The invention can enhance the control moment of a high-speed region of the vehicle, enlarge the speed regulating range, increase the recovery rate of energy and enhance the continuous voyage mileage of the electric vehicle.

The invention provides an adjustable gain low noise amplifier, wherein a predistorter compares gain control voltage Vc with reference voltage Vref, converts into first bias current Ibias, and the first bias current Ibias is supplied for an adjustable gain module; a minimum gain module provides minimum gain control and inputs second bias current Ibias2 for adjusting the gain; and the output of theadjustable gain module and the output of the minimum gain module are combined as the radio-frequency output of the adjustable gain low noise amplifier. Because the gain of the adjustable gain module is controlled by a bias signal after predistortion, the gain of the adjustable low noise amplifier near the reference voltage and the gain control voltage are in logarithm linear relation, and simultaneously the maximum gain and the minimum gain of the adjustable gain low noise amplifier are accurately controlled by arranging the minimum gain module. The adoption of bias current for controlling the gain has the advantage that when the signal is larger, the working current of the amplifier is greatly reduced, so that the power consumption is saved.

The invention discloses a ring-shaped oscillation circuit, a ring-shaped oscillator and a realization method thereof, relating to the technical field of telecommunications. A technical problem that the required precision of a ring-shaped oscillation circuit device is high in the prior art is solved. The circuit comprises a current bias generating circuit and a ring-shaped oscillator level circuit. The ring-shaped oscillator level circuit comprises at least one level of first type of inverter and at least one level of second type of inverter. The current bias generating circuit is coupled with the first type of inverter. The output end of the first type of inverter is connected with the input end of the second type of inverter. The output end of the second type of inverter is connected with the input end of the first type of inverter.

The invention relates to a motor controller for a track traffic platform gate. The motor controller comprises a power supply part, a digital signal processing part, an electric current sampling part, a motor driving part, a relay output part, an external control signal input part and a data storage display part; the power supply part is used for respectively supplying electric currents of needed voltages to the digital signal processing part, the electric current sampling part, the motor driving part, the relay output part and the data storage display part; the electric current sampling part, the motor driving part, the relay output part, the external control signal input part and the data storage display part are respectively connected with the digital signal processing part through electrical signals; the motor driving part is also connected with a motor through an electric wire; and the relay output part is also connected with an upper computer through the electrical signals. The motor controller has the advantages of safety, reliability, strong driving capability, wide application, accurate control, stable running, low cost and the like.

The invention discloses a full-color reflection type smectic liquid crystal display device with high contrast, which comprises a reflecting layer. A first dye liquid crystal hybrid display module, a second dye liquid crystal hybrid display module and a third dye liquid crystal hybrid display module are orderly superposed on the reflecting layer; and a first liquid crystal display module is superposed on the third dye liquid crystal hybrid display module. The full-color reflection type smectic liquid crystal display device with the high contrast has the advantages of rich color display effects,high screen reflectivity, white / black contrast of over 6:1, multistable characteristic, low energy consumption, high image refreshing speed and good environmental protection performance.

The present invention relates to an LED drive circuit which includes a micro-control unit, a voltage protection unit and an LED light source. The voltage protection unit includes an under-voltage protection module, an overvoltage protection module and a reference voltage module. The under-voltage protection module includes a detection voltage input terminal and a reference minimum voltage input terminal. The overvoltage protection module comprises a detection voltage input and a reference maximum voltage input terminal. The reference voltage module provides reference minimum voltage to the under-voltage protection module and provides reference maximum voltage to the overvoltage protection module. The under-voltage protection module and a reference voltage regulation module are set, thus when input voltage is lower than rated minimum voltage, detection voltage is lower than the reference minimum voltage, and the LED light source is turned off. The overvoltage protection module and the reference voltage regulation module, thus when the input voltage is higher than rated maximum voltage, the detection voltage is higher than the reference maximum voltage, and the LED light source is turned off. The LED drive circuit can maintain a constant current characteristic and has the protection of under-voltage, overvoltage and overheating.

The invention provides a synaptic transistor and a preparation method thereof. The synaptic transistor comprises an insulating substrate, a channel material, a source electrode, a gate electrode and adrain electrode. The channel material, the source electrode, the gate electrode and the drain electrode are located on the substrate to form a planar three-terminal structure. The channel material isan amorphous carbon film. A channel region and part of a gate electrode region are covered with a solid electrolyte, and the solid electrolyte contains an organic matter carrier insulated from electrons, and movable ions. The synaptic transistor has the advantages of high stability, low power consumption and the like, and can be applied to neuromorphic devices. Moreover, the amorphous carbon filmis directly prepared on the substrate to form a channel, so that the preparation difficulty is reduced, and the preparation process is simplified. Large-scale integration of the synaptic transistor can be realized, and the synaptic transistor has a good application value.

This invention tracking arc-extinction compensation and select-switching device comprises: Z type grounding transformer connected to bus-bar, which neutral point being connected to one end of arc-extinction coil L1 by a single phase isolation switch, other end of L1 is grounding, said neutral point being connected to lightning protector and a single phase voltage inductance, the secondary wniding, by two ends, being paralleling respectively (1). compensated reactor branching which being composed of a compensated reactor and a silicon cotnrol series connected; (2). buffer resistance branching which being composed of series connected a buffer resistance and a silicon control, zero sequence current mutual inductor CT1-CT48 feedthrough connected to various out line of the sstem. The sampling signals and control signals is connected to controlling device. Advantages are: reliability, no need of filter.

The invention discloses a graphene double-layer electroactive membrane and a preparation method thereof. The graphene double-layer electroactive membrane is composed of a flexible conducting layer anda flexible polymer layer. The preparation method comprises mixing and reacting flake graphite powder, NaNO3, sulfuric acid, KMnO4 and deionized water, and performing washing and drying processes to obtain graphene oxide; mixing and ultrasonic-dispersing the graphene oxide, hydrazine hydrate, ammonium hydroxide and deionized water for reaction to obtain reduced graphene oxide dispersion liquid; dropwise or rotatingly applying the reduced graphene oxide dispersion liquid onto a flexible polymer layer-polymer membrane and performing a drying process to form the flexible conducting layer onto thepolymer membrane to obtain the graphene double-layer electroactive membrane. The graphene double-layer electroactive membrane has the advantages of high responsiveness, low power, broad pressure range and the like when being electrically driven, and can be applied to the fields of flexible wearable equipment, micro motor actuators and micro-robots.

The invention provides a method for protecting a power amplifier and a protective circuit. The method comprises the following steps: detecting the working current value of the power amplifier; judgingwhether the working current value exceeds a preset value; and if the working current value exceeds the preset value, reducing or turning off the bias voltage of the power amplifier so as to reduce orturn off the working current of the power amplifier. The method adopts a current limiting mode for protecting the power amplifier, reduces the working current of the power amplifier or turns off theworking current of the power amplifier by directly controlling the bias voltage of the power amplifier to prevent the power amplifier from being burnt out by heavy current. The method has an extremelyshort response time and can perform the most effective control in the shortest time and under the worst environment so as to achieve the aim of protecting the power amplifier.

The invention relates to a brushless DC (Direct Current) motor for unmanned air vehicles, belonging to the technical field of unmanned air vehicle powerplants. The brushless DC motor comprises an external rotor composed of a rotor end cover, a rotor yoke and a permanent magnet, a stator composed of a winding, a stator iron core and a stator yoke, an upper bearing, a lower bearing, a rotation shaft and a stopper ring, wherein the outer diameter of the rotor yoke is the same as that of the rotor end cover, the rotor yoke is fixed at the lower end of the rotor end cover, the permanent magnet is fixed on the inner wall of the rotor yoke, and the number of magnetic poles of the permanent magnet is 24; the stator iron core comprises 18 slots, the stator yoke is sleeved on the inner wall of the stator iron core, and the winding is coiled on the outside of the stator iron core; the upper bearing and the lower bearing are respectively fixed on two ends of the rotation shaft; the stator is connected with the rotor through the rotation shaft, the stator is embedded inside the rotor end cover, and the stopper ring is sleeved on the rotation shaft. In the invention, by directly driving airscrews, the brushless DC motor is beneficial to elimination of efficiency loss of a driving system, and improvement of lift force / power consumption ratio and lift force / mass ratio of air vehicles.

The invention discloses an intelligent tracked mite eliminating instrument for beds. The intelligent tracked mite eliminating instrument comprises a mite eliminating instrument body, a traveling device and a control unit. The mite eliminating instrument body comprises a mite eliminating device and a shell, and the control unit is respectively connected with the mite eliminating device and the traveling device. The intelligent tracked mite eliminating instrument is characterized in that the traveling device is a tracked traveling device which is arranged at the bottom of the mite eliminating instrument body, the mite eliminating device is arranged at the bottom of the mite eliminating instrument body, and the mite eliminating instrument body is driven by the tracked traveling device to move automatically under the action of the control unit. The intelligent tracked mite eliminating instrument is suitable for moving on soft surfaces of beds, sofas and the like without raising wrinkles or damaging bed sheets or sinking into beddings and is convenient to move and effective in mite eliminating and bactericidal effects. The control unit is capable of setting a certain automatic route for the mite eliminating instrument and setting a traveling speed of the mite eliminating instrument, and accordingly mite eliminating effects and efficiency can be improved beneficially.

The invention provides a server board burning prevention system and a working method. The system comprises a power module, a board burning prevention chip, a BMC and a CPLD. The power supply module supplies power to different parts of the server through a parallel resistor by an output power supply; the anti-burning board chip is respectively connected with the output end and the output end of theresistor; the anti-burning board chip is connected with the CPLD; the CPLD is connected with the BMC, and the BMC is further connected with the anti-burning board chip and the power supply module; when overcurrent occurs in any power supply line, the burn-proof board chip outputs a stop operation signal to the CPLD. After the CPLD receives the interrupt signal, the CPLD sends the interrupt signalto the BMC, and the BMC judges an overcurrent address, stores a log and sends a power-off instruction to the power module. Based on the system provided by the invention, the invention further provides a working method of the anti-burning plate. The board burning prevention chip is additionally arranged, the abnormal position can be quickly positioned and recorded, meanwhile, the power output voltage is turned off, and the board burning phenomenon caused by the abnormal phenomenon is prevented.

The invention provides an electromagnetic actuator, comprising: an outer sleeve (7) of magnetically non-permeable material; a support frame (1) arranged in the outer sleeve, wherein a closed inner cavity is jointly defined by the outer side of the support frame and the inner wall of the outer barrel (7); a coil (6) arranged in the inner cavity; a vibrator component arranged in the support frame (1) in the outer sleeve and including upper and lower circular permanent magnets (2), a permanent magnet skeleton (5) to support the circular permanent magnets (2) and first and second connection rods (3 and 4) fixedly connected with the permanent magnet skeleton, wherein the permanent magnets are symmetrically distributed on the permanent magnet skeleton in a manner of uniform pole distribution directions, the direction of a magnetic field produced by the permanent magnets magnetized and the direction of a magnetic field produced by a coil electrified form a certain included angle; two or moresprings (8) arranged at the top and bottom of the support frame (1) respectively and fixedly connected with the vibrator component after the first and second connection rods (3 and 4) are passed through the centers of the springs.

The invention discloses a low-power boost DC-DC converter capable of being started at an ultra-low voltage. The low-power boost DC-DC converter is characterized in that an internal power selector 101, an internal reference and bias device 102, a (high-side) PMOS (P-channel metal semiconductor) power tube 103, a (low-side) NMOS (N-channel metal semiconductor) power tube 104, an inductive current detecting resistor 105, a leading edge blanking unit 106, a cycle-by-cycle overcurrent protection comparator 107, a PWM (pulse width modulation) comparator 108, a control logic and drive device 109, an oscillator 110, an ultra-low-voltage oscillator 111, a standby signal processor 112, a no-load detecting comparator 113, an error amplifier 114, an output voltage feedback divider resistor 115, an output voltage feedback divider resistor 116, a control switch 118 and an enable device 114 are arranged inside a control chip 100 in a fixedly connected manner. The low-power boost DC-DC converter is particularly suitable for boost application to backup power sources and movable power sources of mobile phones.

The invention discloses a successive approximation type analog-to-digital conversion device. The successive approximation type analog-to-digital conversion device comprises a sample-and-hold circuit, a comparator, a shift register, a digital-to-analog converter, a clock generation circuit and a reference voltage generation circuit. The minimum sampling error can be obtained by adopting the independent sample-and-hold circuit, and a most significant bit charge scaling digital-to-analog converter body, a least significant bit voltage scaling digital-to-analog converter body, an amplifier and the like of the digital-to-analog converter form a closed-loop switched capacitor amplifier. Due to the structure, the influence of charge injection and clock feed-through can be eliminated, the load capacitance of the amplifier can be reduced, and accordingly the power consumption can be reduced. In addition, a gapping switch is additionally arranged between the charge scaling digital-to-analog converter body and the amplifier for isolation, and therefore additional charging current caused by charge averaging can be eliminated.

The invention relates to a non-contact power supply primary circuit with a current expanding function. The non-contact power supply primary circuit comprises an inverter and a primary coil, wherein a primary compensating circuit is connected between the inverter and the primary coil. The primary compensating circuit comprises a first inductor, a first capacitor and a second inductor, wherein one end of the first inductor is connected with the output anode end of the inverter, the other end of the first inductor is connected with one end of the first capacitor and a first end of the second inductor, a second end of the second inductor is connected with one end of the compensating circuit through the primary coil, and the other end of the compensating circuit is connected with the other end of the first capacitor and the output cathode end of the inverter. The compensating circuit compensates inductance in the primary coil, and a resonance circuit is formed between the compensating circuit and the primary coil to enable the first inductor, the first capacitor and the second inductor to form the circuit with the current expanding function. The non-contact power supply primary circuit with the current expanding function can achieve constant control of currents of primary cables, has the current expanding function and is wide in application range and safe and reliable.

The invention provides a multi-cathode laminar flow plasma powder spheroidization device, which consists of an anode part, an interpole part, a cathode part, a power feeding part and an accessory, wherein the anode electrode part consists of an anode casing, an anode, a compression cover and the like. Each part is compressed and connected through screw bolts; the interpole part consists of an arcing ring, an insulation ring, an interpole, an interpole inner sleeve, an interpole outer sleeve and the like; the cathode part and the anode part are simultaneously compressed; the cathode part consists of a cathode case, a cathode sleeve, a cathode and a cathode fastening ring; each part is sequentially connected; the cathode compression ring is in contact with the cathode sleeve and is fixedly connected with the cathode case; the powder feeding part consists of a power feeding pipe and a powder feeding spray nozzle which are sequentially and fixedly connected. The excellent characteristics of good jet flow controllability, high enthalpy value, long jet flow length and the like of the laminar plasma are utilized for realizing the spheroidization on powder; the treated powder has the advantages of high spheroidization rate, high uniformity and the like.

A rotating razor blade comprises a blade body (1) and an inner shaver ring on the blade body. The inner shaver ring comprises at least one inner-ring shaver (2). The inner-ring shaver is perpendicular to the radial direction of the blade body and the head of the inner-ring shaver inclines upward. The blade body has a groove (11) formed after the inner-ring shaver is disposed. The inner-ring shaver is disposed with a strengthening structure for enhancing the connection strength of the inner-ring shaver. A stress releasing structure for preventing stress concentration on the blade body is disposed inside the groove. The razor blade has a simple structure and can be easily manufactured. The strength of the blade and the shaver is increased, so the shearing force is reduced, and the sharpness is enhanced. A razor head disposed with the above blade ensures that hair enters easily and shaving is thorough, and achieves a better effect of fitting the face during shaving to prevent skin injuries.

The invention relates to an Internet-of-Vehicles terminal power control method. A power management module is arranged in an Internet-of-Vehicles terminal to take charge of power-on, power-off, dormancy and awakening functions of vehicle-mounted functional modules, and a reliable and low-energy-consumption voltage logic operation control strategy is provided for a whole system. The control strategyincludes three working states which are the full working mode, a low power consumption mode and an ultra-low power consumption mode. After the system is powered on, the power management module adoptsa full power-on mode to start all the vehicle-mounted functional modules and enters in a Normal mode, and a state machine monitors the working state of the system in real time; after an active dormancy signal is received, the system enters in a front / transitional state, the related functional modules are sequentially stopped according to a set sequence, after all dormancy conditions are met, thesystem enters in the low power consumption dormancy state, and an overtime detection program is started; and after the current working state meets the ultra-low power consumption dormancy condition, the system enters in the ultra-low power consumption dormancy mode, and a deep electricity saving requirement is met.

The invention discloses a constant-current source driver circuit used for driving an LED illumination light source and an integrated current source device based on the circuit. A low-cost resistance-capacitance voltage-reduction type drive circuit is simple in structure and low in cost, but has the disadvantages of poor performance and low efficiency, and damages an LED light source device to a certain extent; a series voltage stabilization type circuit has the disadvantages of large volume, heavy weight, high heat generation, low efficiency and energy waste; and a PWM voltage-stabilizing or constant-current power supply has relatively good performance and higher efficiency, but has higher cost and an important problem of introducing EMI electromagnetic interference. The constant-current source drive circuit has the advantages of good constant-current effect, low cost, high efficiency, long service life and no EMI. The key point to achieve the advantages lies in adopting a CRD device to provide stable base current for a regulating tube so as to greatly improve the overall constant-current technical index on the premise of keeping simple structure and low cost of the constant-current circuit.