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36results about How to "Realize constant voltage output" patented technology
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Switching power supply and multi-threshold switching circuit thereof
ActiveCN102916595AAddressing Structural ComplexityRealize constant voltage outputAc-dc conversionDc-dc conversionElectricityTransformer
The invention is applicable to the technical field of switching power supplies, and provides a switching power supply and a multi-threshold switching circuit thereof. The multi-threshold switching circuit is characterized in that a sampling voltage judgment module is used for dividing voltage outputted by a power supply circuit, comparing the voltage with a first reference voltage, a second reference voltage and a third reference voltage outputted by a reference voltage generating module and outputting corresponding control signals to a voltage-controlled oscillation module according to comparison results; the voltage-controlled oscillation module is used for generating pulse signals with specific duty ratio according to a fourth reference voltage and a fifth reference voltage which are outputted by the reference voltage generating module and the control signals; and a power switch is used for high-frequency on-off switching with a corresponding frequency according to the pulse signals to enable a transformer to perform storage and release of electricity energy correspondingly, so that output voltage of the transformer is periodically modulated to achieve stable contact voltage output. The switching power supply is further simplified structurally by the aid of the multi-threshold switching circuit, and cost is reduced.
Owner:SHENZHEN SUNMOON MICROELECTRONICS
Self-excitation mixed-excitation brushless direct current power-generating system and control method thereof
ActiveCN101610060ASimple structureLow environmental requirementsGenerator control by field variationJet aeroplaneExcitation current
The invention discloses a self-excitation mixed-excitation brushless direct current (DC) power-generating system and a control method thereof, belonging to the category of brushless DC power-generating systems. The power-generating system comprises a mixed-excitation brushless DC generator, a filtering capacitor, two current transformers, an excitation current detecting and regulating circuit, an output current detecting and regulating circuit, an output voltage detecting and regulating circuit and a digital voltage-regulating controller. The control method comprises three steps of control, i.e., voltage feedback control, load current feedback control and excitation current feedback control. The DC power-generating system does not need an external auxiliary power supply and can realize constant-voltage output within a wide rotating speed and large load range. The digital control leads to easy realization of parameter adjustment and modularization design. The DC power-generating system has an important application value in an independent-power-supply DC power-generating system of an airplane, a ship, an automobile, and the like.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Self-excitation mixed-excitation synchronous motor alternating current power-generating system and control method thereof
InactiveCN101610062ASimple structureLow environmental requirementsGenerator control by field variationCurrent transducerCapacitance
The invention discloses a self-excitation mixed-excitation synchronous motor alternating current (AC) power-generating system and a control method thereof, belonging to a synchronous motor AC power-generating system. The power-generating system comprises a mixed-excitation synchronous motor, two current transformers, an excitation current detecting and regulating circuit, an output current detecting and regulating circuit, an output voltage detecting and regulating circuit, a rectifier bridge, a filtering capacitor and a digital voltage-regulating controller. The control method comprises three steps of control, i.e., voltage feedback control, load current feedback control and excitation current feedback control. The AC power-generating system does not need an external auxiliary power supply and can realize constant-voltage output within a wide rotating speed and large load range. The digital control leads to easy realization of parameter adjustment and modularization design. The AC power-generating system has an important application value in a constant-frequency or variable-frequency AC power-generating system of an airplane, a ship, an automobile, a wind power generation system and the like.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Charging method based on constant current-constant voltage output characteristics of wireless electric energy transmission system
ActiveCN109474081ARealize constant voltage outputStable outputBatteries circuit arrangementsElectric powerCapacitanceTransformer
The invention discloses a charging method based on the constant current-constant voltage output characteristics of a wireless electric energy transmission system. LC / S compensation topology is adoptedto replace a direct current input voltage source and an inverter in the LC / S compensation topology with a sinusoidal voltage source of which the frequency is equal to inverter switching frequency, the parasitic resistance of an inductor and a capacitor is ignored, and a loose coupling transformer is replaced with a mutual inductance model to obtain an equivalent mutual inductance model circuit; afull bridge rectifying circuit is replaced with an equivalent load resistor RE, and a primary side parallel compensation capacitor C1 is split into capacitors C1' and C1'' to form LC, CL and series resonant cavities to obtain a simplification circuit; a mutual conductance gain Gi and a voltage gain Gv are defined to obtain a frequency point when the wireless electric energy transmission system has constant current output characteristics and constant voltage output characteristics; and the system is under the obtained frequency point to carry out constant current-constant voltage sectional charging. By use of the method, through the same compensation topology transformation work frequency point, wireless electric energy transmission constant current or constant voltage output characteristics are realized, and therefore, the sectional charging of the battery is realized.
Owner:XIAN UNIV OF TECH
Flyback switching power supply and over-current protection method thereof
ActiveCN101951135AWork lessRealize constant voltage outputAc-dc conversion without reversalLoop controlEngineering
The invention provides a flyback switching power supply and an over-current protection method thereof. The over-current protection method of the flyback switching power supply comprises the following steps of: starting a current close loop control circuit to output a first error voltage when an output current is more than a rated current; starting a voltage close loop control circuit to output a second error voltage when the output current is more than the rated current; converting the first error voltage into a first error current or the second error voltage into a second error current through an optocoupler; and controlling the output current based on the first error current or controlling the output voltage based on the second error current through a control chip. The over-current protection method is characterized in that the power is supplied to the current close loop control circuit, the voltage close loop control circuit and the optocoupler through a voltage stabilization chip so that the switching power supply outputs the constant output current when the output current is more than the rated current.
Owner:奇瑞新能源汽车股份有限公司
Display screen and backlight drive method thereof
InactiveCN102842279ARealize constant voltage outputImprove efficiencyStatic indicating devicesDriving circuitElectrical and Electronics engineering
The embodiment of the invention discloses a display screen and a backlight drive method of the display screen, belonging to the field of drive circuit. With the arrangement of a power chip and a peripheral circuit, when input voltage of the circuit is higher than output voltage of the circuit, the circuit operates in a BUCK state; and when the input voltage of the circuit is lower than the output voltage of the circuit, the circuit operates in a BUCK-BOOST state, and enable output voltage feedback of the circuit to be in parallel connection with loads of the circuit. With the adoption of the circuit and method provided by the invention, constant voltage output of the circuit through automatically switching the circuit states is realized no matter whether the input voltage of the circuit is higher than the output voltage of the circuit, and the overall efficiency is high, and the heating phenomenon cannot be generated.
Owner:SHANGHAI HUAXING DIGITAL TECH
Raw material spraying device for pipe hole structure interior paint spraying
InactiveCN110694833AEasy to cleanReduce the degree of impactLiquid spraying apparatusRotational axisEngineering
The invention discloses a raw material spraying device for pipe hole structure interior paint spraying. The raw material spraying device comprises a bottom mounting plate. By means of the raw materialspraying device, the contact area between the device and paint raw materials during work is reduced, the contact area is a larger volume or is provided with a replaceable part, so that the paint is easier to clean; meanwhile, some parts can be replaced, the influence degree of paint injection of last time on paint injection next time is reduced; in addition, the device can provide constant-pressure conveying, and the constant-pressure spraying effect is achieved; the device is provided a reversed thread structure rotary type longitudinal height adjustment mechanism, and the height of the working portion is adjusted; the device is provided with a ring array type maximum rotation strength control mechanism which can control the maximum rotation strength of a rotating shaft, so that constant-pressure air pressure is provided, and constant-pressure paint output is achieved; and in addition, the device is provided with a pipeline seal installation type paint rotation spray mechanism whichcan achieve 360-degree rotating spray.
Owner:杨淑丽
Constant voltage frequency conversion speed control instrument
InactiveCN107875470ARealize constant voltage outputPressure can be adjusted at any timeEnemata/irrigatorsMedical devicesElectricityFrequency changer
The invention discloses a constant voltage frequency conversion speed control instrument which comprises a controller, a frequency converter, a water pump and a pressure sensor. The frequency converter is electrically connected with a frequency conversion motor of the water pump, a pump outlet of the water pump is connected with an anal tube, the pressure sensor is disposed at the position of thepump outlet, the pressure sensor and the frequency converter are electrically connected with the controller, the pressure sensor feeds detection parameters back to the controller, the controller performs PID calculation on the detection parameters of the pressure sensor and pre-determined pressure, the controller transmits obtained control signals to the frequency converter, the frequency converter controls the rotating speed and torque of the frequency conversion motor according to the control signals, and outlet pressure of the water pump is equal to the predetermined pressure. According tothe constant voltage frequency conversion speed control instrument, the pressure of clysis fluid can be monitored and controlled in real time, the enterobrosis incidence rate is reduced, and the constant voltage frequency conversion speed control instrument is an ideal, simple and safe medical device for performing intussusception reduction.
Owner:鄂尔多斯市中心医院
Integrated oxygen supply valve
PendingCN111237639ASmall footprintEasy to fill and useRespiratorsValve arrangementsPhysicsEngineering
The invention discloses an integrated oxygen supply valve. A valve body, a valve cover, a filling module, a flow adjusting module and a pulse oxygen supply module are included, wherein the filling module, the flow adjusting module and the pulse oxygen supply module are arranged on the valve body and the valve cover. Oxygen in a gas tank is output by the pulse oxygen supply module after passing through the filling module and the flow adjusting module. The pulse oxygen supply module comprises a gas inlet unit, a gas outlet unit and a gas suction unit. The gas inlet unit comprises a sixth gas wayand a seventh gas way which conduct gas inflow from the same gas inlet source. The gas outlet unit comprises a gas outlet outer connector arranged on the valve body, a gas outlet valve plate and a gas outlet cavity. The gas suction unit comprises a gas suction outer connector arranged on the valve cover, a gas suction valve plate and a gas suction cavity, the gas suction valve plate is provided with a gas inlet protruding nozzle communicating with the gas outlet cavity, and a gas inlet membrane for opening and closing the gas inlet protruding nozzle is arranged above the gas inlet protrudingnozzle. An integrated mechanical structure is adopted in the valve, filling operation and usage are simple and convenient, the different-flow requirements can be met, and different-breathing-manner requirements can be met as well.
Owner:无锡金都机械装备有限公司
Intussusception treatment equipment and control method thereof
PendingCN113069625ARealize constant voltage outputReduce incidenceCannulasEnemata/irrigatorsFrequency changerTherapeutic Devices
The invention discloses intussusception treatment equipment and a control method. The intussusception treatment equipment comprises a power interface, a keyboard, a shell, a display screen, a liquid adding opening and an anal tube; the power interface used for being connected with a medical power supply is arranged on the first side face of the shell; the display screen is arranged on the front face of the shell; the keyboard is arranged on the front face of the shell and located below the display screen; the liquid adding opening is formed in the top face of the shell and communicates with a liquid storage container (10) arranged in the shell; the anal tube is connected with a liquid outlet pump (15) arranged in the shell and penetrates through the second side face of the shell; the anal tube is provided with a pressure sensor (17) for acquiring the pressure of enema liquid, and the pressure sensor (17) is arranged in the shell and is connected with a controller which is also arranged in the shell; the controller, a frequency converter (13) and a motor (14) of the liquid outlet pump (15) are connected in sequence; and the controller is also connected with the keyboard.
Owner:鄂尔多斯市中心医院
Switching mode AC-DC converter and control circuit thereof
InactiveCN107276432AReduce standby power consumptionLow costEfficient power electronics conversionAc-dc conversionCapacitanceThumb opposition
The invention discloses a primary-side regulation switching mode AC-DC converter and a control circuit thereof. The switching mode AC-DC converter includes an input rectifier, an input capacitor, an output rectifier, an output capacitor, a controller, a controller energy storage capacitor and a controller power supply rectifier; and a transformer composed of a primary side winding, a secondary side winding and an auxiliary winding. The positive plate of the input capacitor, the negative plate of the output capacitor and the positive plate of the energy storage capacitor are coupled to one group of dotted terminals of the primary side winding, the secondary side winding and the auxiliary winding respectively. The negative plate of the input capacitor, the positive plate of the output capacitor and the negative plate of the energy storage capacitor are coupled to the other dotted terminals of the primary side winding, the secondary side winding and the auxiliary winding respectively. The controller includes a voltage opposition circuit, a constant voltage control circuit, a constant current control circuit and a drive circuit. When the secondary side winding performs charge for the output capacitor, the voltage opposition circuit of the controller negates the voltage of the auxiliary winding and outputs to the constant voltage control circuit so as to stabilize the output voltage.
Owner:上海芯熠微电子有限公司
Bilateral permanent magnet linear motor driven type plunger pump
InactiveCN108757374AReduce mechanical structureIncrease profitPump controlMechanical energy handlingPermanent magnet linear motorEngineering
The invention discloses a bilateral permanent magnet linear motor driven type plunger pump. The bilateral permanent magnet linear motor driven type plunger pump comprises a bilateral permanent magnetlinear motor, connecting rods and four plunger pump bodies. The bilateral permanent magnet linear motor comprises a stator, a first mover and a second mover, wherein the stator comprises a stator ironcore, a first armature winding and a second armature winding, and the first armature winding and the second armature winding are symmetrically distributed in stator slots in both sides of the statoriron core. The first mover includes a mover iron core and permanent magnets, the permanent magnets are located on the mover iron core, and the first mover and the second mover have the same structure.Plungers of the plunger pump bodies are separately connected to the two ends of the first mover and the second mover through the connecting rods, and the four plunger pump bodies have the same structure. The linear motor is adopted to directly drive the plunger pump bodies, mechanical structures such as a crankshaft connecting rod and a reduction gear box are omitted, so that the overall operation reliability and efficiency are improved, and noise is reduced.
Owner:HUAZHONG UNIV OF SCI & TECH
Ia protection grade intrinsically safe power supply circuit with constant voltage output for coal mine
PendingCN112104234ASolve the problem of insufficient carrying capacityRealize constant voltage outputDc-dc conversionElectric variable regulationOvervoltageIntrinsic safety
The invention discloses an ia protection grade intrinsically safe power supply circuit with constant voltage output for a coal mine. The circuit comprises an isolation type power supply conversion circuit (1), a current limiting circuit (2), an overvoltage protection circuit (4) which are connected in sequence and a first voltage feedback control circuit (5) and a second voltage feedback control circuit (6), wherein the input end of the isolation type power supply conversion circuit (1) is connected to an input power supply, the output end of the isolation type power supply conversion circuit(1) is connected to the input end of the current limiting circuit (2), the output end of the current limiting circuit (2) is connected to a load, and the current limiting circuit (2) is used for limiting current output to a load. High-power constant-voltage output of the ia protection grade intrinsically safe power supply within a certain load range is realized, and the problem that the load capacity of the traditional ia protection grade intrinsically safe power supply is seriously insufficient is better solved.
Owner:北京瑞赛长城航空测控技术有限公司 +2
Gas cylinder type pressure-stabilizing dual-mode oxygen supply device
PendingCN111219591AReduce weightEasy to carryGas handling applicationsCheck valvesNasal passagesGas cylinder
The invention discloses a gas cylinder type pressure-stabilizing dual-mode oxygen supply device. The gas cylinder type pressure-stabilizing dual-mode oxygen supply device comprises a gas cylinder, a nasal oxygen tube and an integrated valve mounted on the gas cylinder, wherein a nasal suction joint on the nasal oxygen tube is inserted into a nasal cavity of a user; a gas outlet outer joint and a gas suction outer joint of the integrated valve are connected with a gas inlet of the nasal oxygen tube; the integrated valve comprises a valve body, a valve cover, a filling module, a flow regulatingmodule and a pulse oxygen supply module, wherein the filling module, the flow regulating module and the pulse oxygen supply module are mounted on the valve body and the valve cover; oxygen in the gascylinder passes through the filling module and the flow regulating module and then is output by the pulse oxygen supply module; the pulse oxygen supply module comprises a gas inlet unit, a gas outletunit and a gas suction unit; and the gas inlet unit comprises a sixth gas channel and a seventh gas channel which are used for feeding gas through the same gas inlet source. According to the gas cylinder type pressure-stabilizing dual-mode oxygen supply device, all mechanical parts are adopted to realize continuous and pulse dual-mode oxygen supply, and a pressure stabilizing module and the filling module are integrated inside, so that the device structure and gas guide tube connection are simplified, and therefore, use of the user is convenient.
Owner:AEROSPACE JINPENG TECH EQUIP (BEIJING) CO LTD
Wide input range outdoor optical recording LED high power density conversion method
InactiveCN107154669ASimple structureReduce lossElectroluminescent light sourcesElectric powerEngineeringSolar cell
The invention discloses a wide input range outdoor optical recording LED high power density conversion method. A charging part having an MPPT function and an LED constant current driving part are provided. By deeply analyzing basic characteristics of a solar cell, a storage battery, and an LED, a bidirectional synchronous rectification DC-DC converter having a main topology based on a Buck-Boost type is designed. During the forward operation of the DC-DC converter, a charging circuit adopts a Buck type topological structure, and is used to charge the storage battery by using an MPPT, constant voltage, constant current combination three-phase charging method. During the backward operation of the DC-DC converter, a discharging circuit adopts a Boost type topological structure, the constant voltage output of the LED lamp is realized, and a PWM dimming function is provided. By adopting an improved control method based on a conventional perturbation observation method, and according to the I-V characteristic of the solar cell, an increment of each time is converted into the step size of the next time actually approaching a control voltage, and therefore overcontrol is prevented, and frequency perturbation is reduced during a steady state of a component.
Owner:深圳市和拓创新科技有限公司 +1
A lead-acid battery charer
PendingCN109038773AHigh control precisionReach strong chargingCircuit monitoring/indicationDifferent batteries chargingMicrocontrollerEngineering
The invention discloses a lead-acid battery charger and belongs to that technical field of lead-acid batteries, include a single chip microcomputer control module, power management module, Voltage Sampling Comparison Module, Current Sampling Comparison Module, The battery voltage identification module, the charging current indication module, the saturation display module and the reference voltagesource module. The signal input end of the single-chip microcomputer control module is connected with a time setting unit and a switching unit. The switching unit comprises a manual switch. The invention controls the single-chip microcomputer to output a low-level / high-level signal by turning off / off the manual switch. And then the lead-acid battery to be scrapped is strongly charged and activated, the signal output end of the single chip microcomputer control module is connected with a current sampling and comparing module, The voltage sampling comparison module and the input of the saturation display module regulate the comparison value of the control current sampling comparison module and the comparison point of the voltage sampling comparison module, thereby realizing that the power management module controls the constant voltage or constant current output of the charger, and realizing the purpose of constant voltage or constant current charging.
Owner:濮阳市立圆汽车电器有限公司
Constant-pressure output two-component screw valve
ActiveCN113560137ARealize constant voltage outputReduce the impact of glue outputLiquid surface applicatorsCoatingsPhysicsAdhesive glue
The invention discloses a constant-pressure output two-component screw valve. The constant-pressure output two-component screw valve is provided with a stator fixing seat used for fixing a stator; the stator fixing seat is provided with two stator outlets and two valve body outlets; one stator outlet corresponds to one valve body outlet; the stator outlets and the valve body outlets which correspond to each other are connected through flow channels; and pressure adjusting mechanisms are arranged in the flow channels, so that glue passes through the pressure adjusting mechanisms firstly and then flows out of the valve body outlets of the screw valve. According to the constant-pressure output two-component screw valve, the pressure of the glue flowing out of a screw valve body is consistent, constant-pressure output is achieved, and the influence of resistance of a product cavity or a small-diameter needle head on the glue outlet amount of the screw valve is remarkably reduced.
Owner:CHANGZHOU MINGSEAL ROBOT TECH CO LTD
Constant-voltage output capacitive wireless charging system
PendingCN110707827ASolve the problem of insufficient power transmission capacityRealize constant voltage outputCircuit arrangementsCapacitanceHemt circuits
The invention provides a constant-voltage output capacitive wireless charging system. The system is characterized by comprising a resonance circuit I located at a transmitting end and used for converting an alternating current provided by an external power supply Vin into the constant-current output ; and a resonance circuit II which is used for converting the constant-current output into the constant-voltage output to charge a load RL. The invention provides a constant-voltage output system based on capacitive power transmission in order to solve the problem that the inductive power transmission process is sensitive to the surrounding metal. According to the system provided by the invention, the problem of insufficient electric energy transmission capability caused by the relatively smaller equivalent capacitance of a polar plate during the capacitive electric energy transmission is solved by utilizing resonance, and the constant-voltage output is realized. A specific circuit topological graph and a transmission polar plate structure are given below.
Owner:SHANGHAI TECH UNIV
Self-excitation mixed-excitation brushless direct current power-generating system and control method thereof
ActiveCN101610060BSimple structureLow environmental requirementsGenerator control by field variationPower flowExcitation current
The invention discloses a self-excitation mixed-excitation brushless direct current (DC) power-generating system and a control method thereof, belonging to the category of brushless DC power-generating systems. The power-generating system comprises a mixed-excitation brushless DC generator, a filtering capacitor, two current transformers, an excitation current detecting and regulating circuit, anoutput current detecting and regulating circuit, an output voltage detecting and regulating circuit and a digital voltage-regulating controller. The control method comprises three steps of control, i.e., voltage feedback control, load current feedback control and excitation current feedback control. The DC power-generating system does not need an external auxiliary power supply and can realize constant-voltage output within a wide rotating speed and large load range. The digital control leads to easy realization of parameter adjustment and modularization design. The DC power-generating systemhas an important application value in an independent-power-supply DC power-generating system of an airplane, a ship, an automobile, and the like.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Switching power supply and control circuit thereof
ActiveCN113472207ARealize constant voltage outputReduce loop gainDc-dc conversionElectric variable regulationVoltage dropFrequency generation
The invention discloses a switching power supply and a control circuit thereof. The control circuit comprises: a demagnetization detection module for obtaining a demagnetization time and a sampling time according to a voltage feedback signal; a frequency generation module for generating a ramp signal according to the demagnetization time, an oscillation signal, a first voltage sampling signal and a driving signal of a switching tube; a conduction control module for sampling and holding the voltage feedback signal to obtain a second voltage sampling signal, generating an error signal according to the second voltage sampling signal and a reference voltage, and generating a conduction signal according to the error signal and the ramp signal; a turn-off signal generation module for generating a turn-off signal according to the current sampling signal and the error signal; and a line loss compensation module for generating compensation current according to the demagnetization time, the sampling time and the error signal and superposing the compensation current to the conduction control module. According to the invention, output voltage deviation caused by various influences such as output cable voltage drop, loop direct-current gain error, sampling position movement and the like can be compensated, and an output voltage curve is improved.
Owner:HANGZHOU SILAN MICROELECTRONICS
A CNC Rolling Machine Tool for Torsion Shaft Tooth Root Rolling
The invention provides a numerical control tooth root rolling machine tool for rolling machining of the tooth root of a torsion shaft. Rolling machining can be conducted on the tooth root of the torsion shaft by the numerical control tooth root rolling machine tool, and tooth root rolling machining efficiency is improved. The numerical control tooth root rolling machine tool comprises a machine tool main body, a left tip, a tooth root rolling head, a proximity switch, a torsion shaft and feeding mechanism synchronous movement structure, a numerical control indexing rotary table, a hydraulic chuck, a rotary hydraulic cylinder, an auxiliary support, a numerical control system and a hydraulic system. When the tooth root is rolled, the torsion shaft needs to be located and clamped, thereby being clamped tightly by the hydraulic chuck, and meanwhile the torsion shaft is axially located by the left tip. When the tooth root is rolled, indexing of the torsion shaft is needed, and the numericalcontrol indexing rotary table drives the torsion shaft to achieve indexing rotation. Therefore, through the numerical control rolling machine tool, numerical control rolling machining of torsion shaft splines of various models can be achieved, rolling efficiency is improved, and cost is lowered.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Secondary side parameter design method adaptive to any primary side series compensation WPT system
ActiveCN112350579AImplement soft switchingReduce stressEfficient power electronics conversionDc-dc conversionCapacitanceSoft switching
The invention discloses a secondary side parameter design method adaptive to any primary side series compensation WPT system, which can adapt to any power supply end adopting primary side series compensation, adjust capacitance values of a secondary side coil and a secondary side series compensation capacitor to realize any constant-voltage output required by a load under the condition that a primary side structure and parameters are not changed, and meanwhile, the capacitance value of the secondary side parallel compensation capacitor is adjusted to enable input impedance to be pure resistive, reactive power in the system is approximate to zero, soft switching of a switching device is achieved, and the problem that in the prior art, constant-voltage output and input ZPA designated by a load and soft switching of the switching device cannot be achieved at the same time under the condition that all parameters of a primary side, namely a power supply end, cannot be adjusted is solved.
Owner:NANJING UNIV OF POSTS & TELECOMM +1
Air compressor unit control system and method
PendingCN112746949ARealize constant voltage outputWith IoT functionPump controlPositive-displacement liquid enginesControl systemThe Internet
The invention provides an air compressor unit control system and method. According to the system and method, the function of the Internet of Things is achieved, visualization, big data storage and remote operation can be conducted, intelligent control is achieved, and the labor cost is saved. The air compressor unit control system is characterized by comprising a cloud server, wherein the cloud server is connected with a remote client, a compressor Internet of Things module and a flow collection Internet of Things module, the compressor Internet of Things module is connected with a variable frequency air compressor and a power frequency air compressor set, the output end of the variable frequency air compressor and the output end of the power frequency air compressor set are connected with regulating valves, the regulating valves are connected with a main pipe, a flow meter is installed on the main pipe, and the flow collection Internet of Things module is connected with the flow meter.
Owner:无锡锡压压缩机有限公司
Harmonic self-excitation constant-voltage hybrid excitation permanent magnet motor
ActiveCN106533105AResolution timeSolve problems that require specialized excitation devicesSynchronous machine detailsMagnetic circuitHarmonicMagnetic poles
The invention relates to a harmonic self-excitation constant-voltage hybrid excitation permanent magnet motor. The harmonic self-excitation constant-voltage hybrid excitation permanent magnet motor includes a case, a stator core, a stator armature winding, a rotor core, permanent magnets, a rotor harmonic winding, a rotor excitation winding and a rotation shaft; the stator armature winding is distributed in stator slots; the rotor core is composed of permanent magnetic poles and ferromagnetic poles; uneven air gaps are formed in the permanent magnetic poles; the permanent magnets are embedded into each of the permanent magnetic poles; the permanent magnets are symmetrically distributed with respect to the center lines of the permanent magnetic poles; one side of the center line of each permanent magnetic pole is slotted along a circumferential direction, the rotor harmonic winding is distributed in the slots of the permanent magnetic poles; the rotor excitation winding sleeves the pole bodies of the ferromagnetic poles; and the rotor harmonic winding is directly connected with the rotor excitation winding through a diode rectifying circuit. Compared with the prior art, the hybrid excitation permanent magnet motor of the invention has the advantages of wide-range air gap magnetic field regulating ability, self-excitation, constant voltage output and high efficiency.
Owner:NANCHANG UNIV
A Secondary Side Parameter Design Method Adapting to Any Primary Side Series Compensation WPT System
ActiveCN112350579BFlexible adjustment of output voltageRealize constant voltage outputEfficient power electronics conversionDc-dc conversionCapacitanceSoft switching
A secondary side parameter design method that adapts to any primary side series compensation WPT system, can adapt to any power supply end that uses primary side series compensation, and adjusts the secondary side coil and secondary side while the primary side structure and parameters remain unchanged. The capacitance of the series compensation capacitor realizes any constant voltage output required by the load. At the same time, the capacitance of the parallel compensation capacitor on the secondary side is adjusted so that the input impedance is purely resistive, the reactive power in the system is approximately zero and the soft switching of the switching device is realized. It solves the problem that the existing technical solutions cannot realize the constant voltage output specified by the load, the input ZPA and the soft switching of the switching device at the same time under the condition that the parameters of the primary side, that is, the power supply end, are not adjustable.
Owner:NANJING UNIV OF POSTS & TELECOMM +1
Hybrid Excitation Permanent Magnet Motor with Double Harmonic Excitation
ActiveCN104682648BSimple structureImprove reliabilityMagnetic circuit rotating partsMagnetic circuit stationary partsHarmonicPermanent magnet motor
The invention provides a biharmonic excitation mixed excitation permanent magnet motor. The biharmonic excitation mixed excitation permanent magnet motor comprises an enclosure, a stator iron core, a stator winding, a permanent magnet, a rotary shaft, a rotor iron core and a rotor winding, wherein the stator winding is distributed in a stator groove; the rotor iron core is provided with a permanent magnet pole and a ferromagnetic pole; the rotor winding is composed of a harmonic winding a, a harmonic winding b and an excitation winding; the harmonic winding a is distributed in a groove of the permanent magnet pole and the harmonic winding b is distributed in a groove of the ferromagnetic pole; the excitation winding sleeves the pole body of the ferromagnetic pole; the harmonic winding a and the harmonic winding b are connected with the excitation winding by diode rectification circuits. When a power generator is operated, a gas magnetic field can be automatically adjusted by induction electrodynamic potentials of the harmonic windings. Compared with the prior art, an electric brush, a slide ring, an alternating-current exciter and a voltage regulator are not needed, and a gas gap and an axial magnetic path are not needed; the biharmonic excitation mixed excitation permanent magnet motor has a simple structure, good gas magnetic field adjusting capability and compound excitation property.
Owner:NANCHANG UNIV
Two-way isolated digital dcdc power supply and control method
ActiveCN109075715BImprove reliabilityReduce complexityDc-dc conversionElectric variable regulationSoftware engineeringHemt circuits
A bidirectional isolated digital DCDC power supply and a control method, the power supply comprising an input side (102), an output side (104) isolated from the input side (102), and a feedback circuit connected to the input side (102) (106) and an isolated pulse width modulator (112), an optocoupler (108) connected to the feedback circuit (106), and the optocoupler (108) and the isolated pulse width modulator (112) a digital signal processor (110) connected; the feedback circuit (106) for acquiring the output voltage error of the input side (102); the optocoupler (108) for converting the output voltage error sent to the digital signal processor (110); the digital signal processor (110) is used to obtain a voltage feedback parameter according to the output voltage error; the isolated pulse width modulator (112) is used to obtain a voltage feedback parameter according to the output voltage error The voltage feedback parameter adjusts the output voltage of the input side (102), thereby improving the reliability of the power supply.
Owner:SHINRY TECH
Charging method based on constant current-constant voltage output characteristics of wireless power transfer system
ActiveCN109474081BRealize constant voltage outputStable outputBatteries circuit arrangementsElectric powerCapacitanceHemt circuits
Owner:XIAN UNIV OF TECH
Wireless charging circuit, control method thereof and electronic equipment
PendingCN114243940AImprove output power and transmission efficiencyImprove power efficiencyBatteries circuit arrangementsCharging stationsInductorElectric energy
The invention provides a wireless charging circuit, a control method thereof and electronic equipment, and relates to the field of wireless charging. In the wireless charging circuit, a primary side module is connected with a primary side inductor, the primary side inductor is coupled with a secondary side inductor, the secondary side inductor, a switching compensation module and a secondary side module are sequentially connected, the primary side module is externally connected with an input voltage, and the secondary side module and the switching compensation module are both connected with a load; the switching compensation module is used for switching a compensation mode according to the voltage of the load; when the voltage of the load is lower than a set threshold value, the switching compensation module is switched to a first compensation mode to realize constant current output; when the voltage of the load is larger than or equal to the threshold value, the switching compensation module is switched to a second compensation mode, and constant voltage output is achieved. In the application, the switching compensation module can be switched to different compensation modes according to the voltage condition of the load, and constant-current and constant-voltage wireless charging can be realized, so that the output power and transmission efficiency of electric energy transmission are improved.
Owner:金琥新能源汽车(成都)有限公司
Power control type battery management system for base station energy storage battery subrack
PendingCN114552700AMeet the requirementsEnsure continuous and stable workCircuit monitoring/indicationDifferent batteries chargingElectrical batteryControl theory
The invention discloses a power control type battery management system for a base station energy storage battery subrack. The power control type battery management system comprises a DC / DC (Direct Current / Direct Current) conversion module and a battery management unit, the DC / DC conversion module is used for converting alternating current output by the commercial power module into direct current and comprises an AC / DC rectification module, a multiphase bidirectional BUCK / BOOST current controller and a control module. And the control module is used for controlling the charging and discharging voltage and current of the AC / DC rectifier module according to the working condition of the base station energy storage battery plug-in box. The control module controls the magnitude of voltage and current output by the AC / DC rectifier module and controls the multiphase bidirectional BUCK / BOOST current controller according to parameters collected by the function sensor. The battery management system not only can be matched with batteries of different voltage systems, but also can realize constant-voltage output of the battery pack due to dynamic adjustment of the input voltage or the input current, and meets the use requirements of a base station.
Owner:利天万世(上海)能源科技有限公司
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