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52results about How to "Reduce load current" patented technology
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Light-load transient enhanced circuit and low-voltage-difference linear voltage stabilizer integrated with circuit
InactiveCN104407662ASimple structureImprove stabilityElectric variable regulationLow voltageEngineering
The invention discloses a light-load transient enhanced circuit and a low-voltage-difference linear voltage stabilizer integrated with the circuit. The light-load transient enhanced circuit comprises a dynamic bias voltage generation circuit, a load current control switch, a voltage stabilizing capacitor, a discharging circuit and an output circuit; when the light-load transient enhanced circuit has a light load, no static current is consumed; when the low-voltage-difference linear voltage stabilizer is switched to the light load from a heavy load, gradually-reduced load current is provided by the light-load transient enhanced circuit, and the establishing time of the low-voltage-difference linear voltage stabilizer is greatly shortened, so that the problem that the establishing time for switching the current low-voltage-difference linear voltage stabilizer from the heavy load to the light load is too long is solved; secondly, extra auxiliary circuits are not needed so that the structure is simple and the transient response performance of the low-voltage-difference linear voltage stabilizer can be enhanced when the load is light, and furthermore, the light-load transient enhanced circuit can be applicable to ultralow-power-consumption medical electronics application.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Automatic dimming emergency lamp
ActiveCN103037560AReduce brightnessThe total load resistance increasesElectric light circuit arrangementEnergy saving control techniquesElectricityEngineering
The embodiment of the invention discloses an automatic dimming emergency lamp. The automatic dimming emergency lamp comprises an emergency power supply, a boost constant current module, a power supply switching module and a field effect transistor Q2, a load of the boost constant current module comprises a first load resistor and a second load resistor, two ends of the first load resistor are connected with ground and one end of the second load resistor respectively, the other end of the second load resistor is connected with a source electrode of the field effect transistor Q2, a drain electrode of the field effect transistor Q2 is grounded, a grid electrode of the field effect transistor Q2 is connected with a first input end of the power supply switching module, the first input end of the power supply switching module is connected with a mains supply conversion low power supply, a second input end of the power supply switching module is connected with the emergency power supply, an output end of the power supply switching module is connected with the boost constant current module, the power supply switching module is used for controlling the boost constant current module to access to the mains supply conversion low power supply when a mains supply is normal, the field effect transistor Q2 is connected, when the mains supply is cut off, the power supply is switched to the emergency power supply, and the field effect transistor is disconnected. According to the automatic dimming emergency lamp, the access or cutting off of the second load resistor is controlled through connecting and disconnecting of the Q2, so that the illumination intensity of the emergency lamp is changed, and the illumination time is prolonged.
Owner:OCEANS KING LIGHTING SCI&TECH CO LTD +1
Electric power steering device
InactiveCN103959638APrevents a drop in output responsePrevent Accuracy DeteriorationElectronic commutation motor controlAC motor controlPower steeringPower inverter
An object of the present invention is to provide an electric power steering device which detects each phase current of a motor with a single-shunt current detection circuit, and reliably detects failures (abnormal states) in the current detection circuit with a simple configuration, thereby enhancing safety. The electric power steering device is provided with: a single-shunt resistor connected to an inverter; a control motor current detection circuit which is connected in a forward direction to both ends of the shunt resistor and detects the phase currents of a motor as control motor current detection values for assist control; and a diagnosis motor current detection circuit which is connected in a reverse direction to both ends of the shunt resistor and detects failures in the control motor current detection circuit. The electric power steering device detects each phase current of a motor with the single-shunt scheme to perform assist control, and has two systems of circuits which amplify the voltage across the ends of the shunt resistor.
Owner:NSK LTD
Dynamic current sharing control method and circuit
The invention relates to a dynamic current sharing control method and circuit. A control circuit comprises a plurality of power modules connected in series, a main control panel, sub control panels and control switches, wherein the sub control panels and the control switches are in same numbers of the power modules, dynamic current sharing reference data is transmitted between the main control panel and the sub control panel of each power module through communication, through each control switch at an output end, multiple output is achieved by each power module, and dynamic current sharing control after arbitrary numbers of the power modules are connected in series is achieved. The invention also comprises another control method and two control circuits. By adopting the control method and circuit disclosed by the invention, a current sharing state can be reached after the plurality of power modules are arbitrarily combined and randomly connected in series, and the reliability of current sharing is further guaranteed.
Owner:O&C ELECTRIC TECHN CO LTD
Variable frequency starting method and device and storage battery supply
ActiveCN102916627AReduce output powerLow take-off frequencyPolyphase induction motor starterPower flowRelative motion
The invention relates to a variable frequency starting method and device and a storage battery supply. When a load is started to produce huge starting current, due to adoption of a mode of respectively setting the output voltage and the output frequency of a boosting inversion circuit into the voltage and frequency meeting the lowest load starting requirement, the load current rises slowly and slightly till reaching the rated voltage and the rated frequency when the load stably operates, and the increasing range of the load current in the starting process is limited to not exceed a safety range so as to protect a power device in a circuit. Because the onset voltage just can meet the starting requirement of the load and is far lower than the steady-stage voltage when the load operates, the load current in the starting process can be reduced under the condition of certain load resistivity; and the onset frequency calculated according to the onset voltage is also lower, the relative motion between a motor stator and a motor rotor of the load is in slow rise from sharp rise, the output power of the motor is reduced, the load current is reduced immediately, and therefore the purpose of limiting the huge starting current from two aspects is achieved.
Owner:湖南终南山科技发展有限公司
Arc extinguishing mixed transfer switch and switch transferring method
InactiveCN101958573AExtend your lifeLow powerElectric switchesEmergency power supply arrangementsTransfer switchThyratron
The invention discloses an arc extinguishing mixed transfer switch which comprises a mechanical switch and a first thyristor branch circuit, wherein the first thyristor branch circuit is connected in parallel with a first contact point branch circuit of the mechanical switch; and the first thyristor branch circuit comprises a first bidirectional thyristor unit and a first non-polarity capacitor connected in series. The invention also discloses a switch mixed transferring method for arc extinguishing of the mechanical switch. Because the first non-polarity capacitor is arranged, a low-powered thyristor can be selected, thereby greatly reducing the cost of the thyristor; and simultaneously, when the thyristor has a short circuit fault, the first non-polarity capacitor can substitute the thyristor to play the arc extinguishing affect, thereby greatly decreasing load current and reducing the influence of the thyristor fault on load.
Owner:ASCO POWER TECH LP
Method and device for controlling switching to standby transformer
InactiveCN106300341AReduce shockReduce load currentAc network circuit arrangementsTransformerSuppressor
The invention relates to the field of electric power supply and discloses a method and device for controlling switching to a standby transformer. The method comprises the following steps: according to correlation parameters of bus voltages and standby voltages, determining whether to start switching to the standby transformer; when it is determined that the switching to the standby transformer is started, transmitting a closing instruction to a surge suppressor and a circuit breaker; after the closing instruction is received through the surge suppressor, monitoring the bus voltages so as to output closing signals to the circuit breaker at the transmission moment when surges during closing are enabled to be smallest; and receiving the closing instruction and the closing signals through the circuit breaker, and according to the closing instruction and the closing signals, performing closing so as to realize the switching to the standby transformer. According to the invention, loss caused by no load of the standby transformer can be avoided, and energy can be saved; and impact on the standby transformer due to simultaneous superposition of transformer excitation surges and motor self-startup load currents can be reduced.
Owner:CHINA SHENHUA ENERGY CO LTD +2
Ripple elimination circuit, ripple elimination method and LED control circuit applying ripple elimination circuit
PendingCN108513408AReduce load currentSimple controlElectroluminescent light sourcesPower conversion systemsEngineeringControl circuit
The invention provides a ripple elimination circuit, a ripple elimination method and an LED control circuit applying the ripple elimination circuit. The ripple elimination method comprises the following steps that: the ripple elimination circuit obtains a detection signal representing the voltage at a low potential end of a load, and when the detection signal is less than a first threshold value,load current decreases; when the detection signal is greater than a second threshold value, the load current increases; and when the detection signal is greater than or equal to the first threshold and less than or equal to the second threshold, the load current remains unchanged. The ripple elimination effect is remarkable, and the load current is more stable.
Owner:JOULWATT TECH INC LTD
Electric hair trimmer
ActiveCN103722573AFlat contact surfaceReduce noiseMetal working apparatusEngineeringDegrees of freedom
The invention discloses an electric hair trimmer comprising a cutter head unit, a motor, a rotating shaft, and a power source. The cutter head unit comprises a fixed cutter unit, a moving cutter unit and a fine adjustment mechanism. The moving cutter unit is arranged above the fixed cutter unit. The moving cutter unit comprises a moving cutter and a moving cutter drive rack. The fine adjustment mechanism comprises an adjusting block and a torsion spring arranged on the same. Two ends of the torsion spring are inserted onto the moving cutter drive rack, so that the moving cutter has a degree of freedom of motion, rocking left and right and sliding back and forth relative to the fixed cutter unit. The upper surface of the fixed cutter unit is provided with a grinding bar or a grinding layer. The grinding bar or grinding layer is disposed on the upper surface of the fixed cutter unit, so that the trimmer has the function of blade sharpening; when the shearing sharpness of the cutter head decreases, the cutter head can be ground with the grinding bar or grinding layer and kept sharp, hair-cutting efficiency is improved, the service life of the cutter head is greatly prolonged, and cost is saved.
Owner:HUANXING TECH HANGZHOU CO LTD
Multiple-chip array type chip-on-board (COB) inversely-installed eutectic packaging structure and method
InactiveCN103378079AShorten the cooling pathReduce thermal resistanceSolid-state devicesSemiconductor devicesEutectic bondingOn board
The invention relates to a multiple-chip array type chip-on-board (COB) inversely-installed eutectic packaging structure and method. The multiple-chip array type COB inversely-installed eutectic packaging structure comprises a ceramic heat-radiating substrate, a fluorescent powder and silica gel mixed packaging layer and light-emitting diode (LED) chips, wherein an insulating layer is arranged on the upper surface of the ceramic heat-radiating substrate, a circuit conductor layer is arranged above the insulating layer, and multiple LED chip connecting units are installed on the upper side of the ceramic heat-radiating substrate. Each LED chip connecting unit consists of a bonding layer, an LED chip and a gold wire shared by thermo-sonic keys, wherein the positive pole ends of the chips are in eutectic bonding with the bonding layers and connected with the circuit conductor layer, and the negative pole ends of the LED chips are connected with one end of the circuit conductor layer on the front side of the substrate through the gold wires. The multiple-chip array type COB inversely-installed eutectic packaging structure and method has the advantages of being excellent in heat-radiating effect and capable of avoiding the problems including chip defects or reduced luminous efficiency and the like caused by the different expansion degree of the chip and the substrate with heat, facilitating wire arrangement, reducing bonding temperature, improving the reliability performance and solving the problems of false welding and unsoldering of wires.
Owner:GUANGDONG JINYUAN LIGHTING TECH
Intelligent load balancer
PendingCN107834939AMeet electricity demandAvoid damagePower factor controlMotor parameters estimation/adaptationPower compensationVoltage regulator module
The invention relates to power compensation equipment, in particular to an intelligent load balancer. The intelligent load balancer comprises a sampling module, a main power supply input end, a voltage regulator module, an isolation transformer, a power supply detection module, a datum grounding end, a main controller, a compensation switch, a compensation module, a driver and a main power supplyoutput end; the driver is arranged between the isolation transformer and the main power supply output end; the driver is positioned between the compensation switch and the main power supply output end; the driver is connected in parallel with a driver isolation switch; one end of the driver isolation switch is connected between the input end of the driver and the compensation switch; and the otherend of the driver isolation switch is connected to the output end of the driver. The intelligent load balancer has the beneficial effects that coordinated operation of variable frequency speed regulation and power compensation functions can be implemented; and the intelligent load balancer has a very good energy-saving effect.
Owner:哈尔滨泾铎技术有限公司
Incremental encoding type gas stove control device
PendingCN110779055AAchieve measurable goalsPrecisely control the rotation angleDomestic stoves or rangesLighting and heating apparatusElectric machineControl engineering
The invention relates to an incremental encoding type gas stove control device comprising a fixed box, an incremental encoder, a speed reduction motor, an inner sleeve ring, a gas switch rotary knob and a control module. A clamping groove is formed in an object containing box structure part of the fixed box. The lower end of the fixed box is fixedly installed on a gas stove tabletop. The incremental encoder is of a hollow structure and contains a hollow shaft. The outer wall of a gas fire regulation rod is sleeved with the hollow shaft. A speed reduction motor rotor is aligned and fixedly connected with the axis of the gas stove fire regulation inner rod. An incremental encoder shell and a speed reduction motor stator are both fixed to the inner wall of the inner sleeve ring. A wire grooveis formed in the inner wall of the inner sleeve ring. A limiting stopper is inserted in the clamping groove of the fixed box. A rotary knob inner groove is formed in the lower end of the gas switch rotary knob and is installed in a sleeving manner together with the upper end of the speed reduction motor rotor.
Owner:GUILIN UNIV OF AEROSPACE TECH
Control method of eliminating static rolling torque in band and strip rolling mill
ActiveCN105728472AReduce load currentImprove work efficiencyRolling mill drivesMetal rolling arrangementsPulse controlSilicon-controlled rectifier
The invention discloses a control method of eliminating static rolling torque in a band and strip rolling mill. The control method comprises the following steps of: step one. starting the rolling mill, causing silicon controlled rectifier trigger pulse control to be in an opening enabled state, and starting the rolling mill for rolling under the control of a direct-current speed adjusting controller according to the speed given value P1, wherein the previous five times stopping of the present rolling period aims at changing a rolling direction, namely causing the rolling mill to be in a zero speed working state; during reverse rolling, the direct-current speed adjusting controller quickly reduces forward current and establishes reverse current as long as the given value of the rolling speed P1 of the rolling mill is negated, controlling a main motor of the rolling mill to carry out reverse rolling according to the set speed till completing the last rolling pass in the present rolling period; and step two. sequentially stopping, losing tension, opening cleaning between rolls and discharging coils, thereby ending the whole rolling period of a steel coil. The control method greatly prolongs the service life of each impacted part, improves the working efficiency of the rolling mill and increases the yield of steel coils.
Owner:MCC SFRE HEAVY IND EQUIP
LDO circuit, control method, chip and electronic equipment
ActiveCN114647271AReduce load currentLarge load currentEfficient power electronics conversionElectric variable regulationVoltage regulationHemt circuits
The invention provides an LDO circuit, a control method, a chip and electronic equipment, and belongs to the technical field of electronics. The LDO circuit comprises a voltage regulation module and a control module. The control module is configured to generate an overshoot adjusting signal changing along with the amplitude of the output voltage when the output voltage of the LDO circuit generates overshoot; and / or when the output voltage of the LDO circuit generates undershoot, an undershoot adjusting signal changing along with the amplitude of the output voltage is generated; the voltage regulation module is configured to reduce the load current of the LDO circuit based on the overshoot regulation signal; and / or increasing the load current of the LDO circuit based on the undershoot adjusting signal. By adopting the LDO circuit, quick response to overshoot or undershoot can be realized, and meanwhile, the power consumption of the LDO circuit is reduced.
Owner:CHIPSEA TECH SHENZHEN CO LTD
A method, device, and mobile terminal for preventing power failure protection
InactiveCN105353862BReduce load currentExtend power supply timePower supply for data processingInput/output processes for data processingElectricityCapacitance
The invention provides a power-down protection method and apparatus and a mobile terminal. The power-down protection method and apparatus are used for solving the problem that a handheld device loses power due to instant disconnection of a battery and a circuit board possibly caused when the handheld device encounters relatively strong impact or shake. The power-down protection method comprises: obtaining motion state data of the mobile terminal detected by an acceleration sensor of the mobile terminal; when the volume of the motion state data is greater than a first preset value, closing at least one application, which is being run currently, of the mobile terminal, and performing data backup on data of the at least one application; and after detecting that a power supply is disconnected from the circuit board, supplying power to the circuit board through an energy storage capacitor connected in parallel with the power supply. According to the power-down protection method and apparatus, when the battery is disconnected from the circuit board, the energy storage capacitor supplies an extra power supply to the mobile terminal; and meanwhile, a load current in the mobile terminal is reduced, and the data in the mobile terminal are subjected to data backup, so that the power-down protection is enhanced.
Owner:LENOVO MOBILE COMM TECH
Remote controller
ActiveCN102474676AImprove usabilityReduce load currentBatteries circuit arrangementsTelemetry/telecontrol selection arrangementsTime of useEngineering
At the time of using a general-purpose cell (33), in a cell changing switch (20) provided in a remote controller, a terminal (a) and a terminal (b) are connected to each other, and a terminal (d) and a terminal (e) are connected to each other by means of a slider switch (20a). A microcomputer (30) can be supplied with power from the general-purpose cell (33) by having the terminal (d) and the terminal (e) connected to each other. At that time, by having the terminal (a) and the terminal (b) connected to each other, a solar cell (12) is not connected to the microcomputer (30), and the lithium primary cell (32) is not connected to the microcomputer (30), either, with a terminal (f) not connected to the lithium primary cell. As a result, the connection between the solar cell (12) and the microcomputer (30) and that between the lithium primary cell (32) and the microcomputer are completely interrupted.
Owner:HITACHI JOHNSON CONTROLS AIR CONDITIONING INC +1
Memory and its column decoding circuit
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP
Light-emitting diode (LED) electrolytic capacitor-free constant current power supply
ActiveCN103151942AEasy to integrateSimple structureAc-dc conversionApparatus without intermediate ac conversionTransformerHemt circuits
The invention discloses a light-emitting diode (LED) electrolytic capacitor-free constant current power supply, which comprises a rectifying circuit, a frequency conversion circuit, a driving output circuit, a feedback control circuit and a feedback protection circuit. Constant current feedback information is controlled to be fed back by three paths. The first path refers to that external voltage is fed back through a resistor R1 and a triode VT1; the second path refers to that current flowing through an auto-transformer is fed back through a resistor R3 when frequency is low; and the third path refers to that transformation current of the auto-transformer is fed back through a resistor R15 when the frequency is high. According to the LED electrolytic capacitor-free constant current power supply disclosed by the invention, the output current is average current which consists of direct-current pulses. According to external voltage changes, output pulse widths also are different. The constant current refers to the average current of the LED electrolytic capacitor-free constant current power supply in a certain period. The LED electrolytic capacitor-free constant current power supply disclosed by the invention is simple in structure. The requirement of a traditional constant current power supply on an electrolytic capacitor is met. The electrolytic capacitor is removed, so that the constant current power supply can be made to be smaller in size; the circuits can be conveniently integrated. The LED electrolytic capacitor-free constant current power supply can work under an environment with higher temperature, and the service life of the LED electrolytic capacitor-free constant current power supply is longer than that of the constant current power supply with the electrolytic capacitor.
Owner:湖北湛青科技股份有限公司
Equipment power-saving device
InactiveCN108599160AImprove cooling effectExtended service lifeSubstation/switching arrangement cooling/ventilationSubstation/switching arrangement casingsElectrostatic coatingEngineering
The invention discloses an equipment power-saving device. The device comprises a shell, a power input interface is arranged at one side of the shell, and a power output interface is arranged at the other side; multiple interfaces are arranged at front side of the shell, a power-saving mechanism is arranged in the inner cavity of the shell, and the power-saving mechanism is arranged between the power input interface and the power output interface; multiple radiating slots are formed on the upper end surfaces of the shell, and a radiating fan is arranged at inner sides of the radiating slots, and an anti-electrostatic coating is coated on the outer wall of the shell. The equipment power-saving device disclosed by the invention is novel in structure design and capable of effectively saving the power utilization of the equipment; furthermore, the power-saving device has excellent radiating effect and long service life.
Owner:MAANSHAN SONGHAK INFORMATION TECH CO LTD
A startup auxiliary power circuit
InactiveCN101242138AReduce power consumptionReduce heat dissipationDc-dc conversionElectric variable regulationComputer moduleEngineering
The invention discloses a start accessory power supply circuit, including a voltage regulator circuit providing a reference voltage, a current circuit connected with the voltage regulator circuit, wherein the current circuit has an output port. The invention is characterized in that: the voltage regulator circuit includes at least two voltage regulator tubes connected mutually, and a controller is connected with at least one voltage regulator tube in parallel, the controller is possible to be in the short circuit condition or the open circuit condition. The controller is a switching tube, the control input terminal of the switching tube is connected to the guard signal output terminal of an outside circuit, and the output port of the switching tube is connected with the both ends of the voltage regulator tube in parallel. The invention uses two or above voltage regulator tubes in series connection to provide the reference voltage, controllers are connected with part of voltage regulator tubes in parallel, so that the reference voltage output value of the entire voltage regulator tubes circuit may be cut, when the outside module has the protection movement, the output voltage of the accessory power supply for starting will be reduced, the load current provided for starting the accessory power supply will be reduced, so as to reduce the primary device power loss and the heat dissipating capacity.
Owner:ASTEC POWER SUPPLY (SHENZHEN) CO LTD
Method for forecasting turn-off time of contactor by battery management system of electric automobile
InactiveCN102642478AExtended service lifeReduce load currentVehicular energy storageElectric propulsionContactorTurn off time
The invention discloses a method for forecasting the turn-off time of a contactor by a battery management system of an electric automobile. The method comprises the following steps that: a, the battery management system detects a fault that a power battery generates in real time and sets the overflow time of a turn-off timer of the contactor; and b, the overflow time of the turn-off timer of the contactor is sent to an entire-automobile CAN (controller area network), and the entire-automobile CAN controls each node to complete current reduction response within the overflow time of the timer of the contactor. The method has the advantages that: 1, by sending the forecasted turn-off time of the contactor and the fault information of the power battery to the entire-automobile CAN, the battery management system notifies and requires relevant nodes such as an entire-automobile controller and a motor controller to complete the current reduction response within estimated time in advance; the load current in a turn-off process is decreased; and the service life of the contactor is prolonged; and 2, the risk of generating a serious safety problem is reduced.
Owner:HUIZHOU EPOWER ELECTRONICS
A light-load transient enhancement circuit and a low-dropout linear regulator integrating the circuit
InactiveCN104407662BSimple structureImprove stabilityElectric variable regulationLow voltageEngineering
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
A 6u high-density server system power supply structure
ActiveCN109032299BReduce heat productionSave spaceVolume/mass flow measurementPower supply for data processingHigh densityEngineering
Owner:ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
Light-load current detection device and method based on light-load mode of switching power supply
PendingCN111987893AImprove device battery lifeReduce load currentEfficient power electronics conversionPower conversion systemsSampling circuitsVoltage reference
The invention relates to a light-load current detection device and method based on a light-load mode of a switching power supply. The device comprises the switching power supply and a timing module. The switching power supply comprises a light load mode detection module and a switching power supply control module. The light load mode detection module compares the output voltage of the switching power supply with a reference voltage, and outputs a sleep signal to the switching power supply control module according to a comparison result so as to control the output of the output voltage of the switching power supply. The timing module receives the dormancy signal and outputs a light load current confirmation signal when the dormancy signal indicates that the switching power supply is in a light load mode for more than a preset time. According to the invention, no extra sampling resistor sampling circuit or packaging cost needs to be added, no dependence on the sampling circuit precisionis needed, smaller load current can be detected, the switching power supply is intermittently turned on, the equipment always works in a high-efficiency mode before dormancy, and the endurance of theequipment is improved.
Owner:南京力源微电子有限公司
Combustion controlling circuit
InactiveCN1114789CAvoid inconvenienceReduce load currentFluid heatersDomestic stoves or rangesValve openingPower circuits
To decrease a maximum load current in a combustion control circuit using as a power source a power source circuit for converting an alternating current from a battery or a commercial power source into a direct current. A combustion control circuit comprises a valve opening circuit 23 for forcedly opening a safety valve 14 under an electromagnetic force, a holding circuit 24 for opening and holding the safety valve 14, an ignition circuit 25 and a flame rod circuit 26. During an ignition operation, the valve opening circuit 23 is operated for a short time, and the holding circuit 24 and the ignition circuit 25 are operated for a prescribed ignition time. Then, after the operation of the valve opening circuit 23 is completed, the flame rod circuit 26 is operated.
Owner:RINNAI CORP
A LED constant current power supply without electrolytic capacitor
ActiveCN103151942BEasy to integrateSimple structureAc-dc conversionApparatus without intermediate ac conversionTransformerAverage current
Owner:湖北湛青科技股份有限公司
Voltage conversion circuit and power converter
PendingCN114257088AStable output voltageMeet load requirementsDc-dc conversionElectric variable regulationPhysicsFeedback circuits
The invention provides a voltage conversion circuit and a power converter. The voltage conversion circuit comprises a main circuit, a feedback circuit, a control circuit, a clamping module and a driving unit, the control circuit is connected with the driving unit and the clamping module and is used for comparing the feedback voltage with the first reference voltage and outputting a second signal when the feedback voltage is higher than the first reference voltage; the clamping module is used for boosting the first voltage converted based on the feedback voltage and fixing the first voltage to a first preset voltage based on the second signal; and the driving unit is electrically connected with the control end of the switch module and is used for adjusting the driving mode of the switch module into a pulse cross-period modulation mode based on the second signal and controlling the switch-on and switch-off of the switch module. Under the light load condition, the voltage conversion circuit is controlled to enter the pulse cross-period modulation mode, the switch module can be driven to be switched on and switched off at a low frequency, the power consumption of the switch module can be reduced, and the power supply voltage conversion efficiency can be improved.
Owner:베이징에스윈컴퓨팅테크놀로지씨오엘티디
Power saver with improved current path and integrated power saver with the same
InactiveCN104505831BSimple structureLow costAc network circuit arrangementsElectricityInsulation layer
A electricity-saving appliance for improving a current channel comprises a housing, wherein at least two ceramic reels parallelly arranged at intervals are arranged at the bottom of the housing, at least two lead wires are inserted into the bottom of the housing and sequentially wounded on the ceramic reels, the lead wires on each ceramic reel are winded at intervals, insulation layers are cover the upper portions of the ceramic reels and the lead wires, ceramic particles are filled between the insulation layers and the bottom of the housing, and fill materials are filled between the upper portions of the insulation layers and the housing. The electricity-saving appliance and a comprehensive electricity-saving device provided with the electricity-saving appliance improve power transmission efficiency to improve the electricity-saving efficiency under the condition that voltage is not changed by decreasing load current in a current channel improving mode, are suitable for various electrical appliances, are especially used in certain production fields needing high-voltage power and especially can produce remarkable electricity-saving effect.
Owner:吴刚
Three-phase-circuit phase selection switch system and method for preventing failure and short circuit of relay
PendingCN108390400AFacilitate automated productionReduce volumeEmergency protective circuit arrangementsPolyphase network asymmetry elimination/reductionPhase conversionCurrent sensor
The invention relates to a phase-selection-circuit phase selection switch system and method for preventing failure and a short circuit of a relay. In the phase-selection-circuit phase selection switchsystem for preventing the failure and the short circuit of the relay, every phase comprises a combination switch composed of a semiconductor switch and a relay, a relay breaking feedback circuit anda semiconductor switch trigger circuit, wherein the combination switch is composed of the semiconductor switch and the relay, and the relay breaking feedback circuit and the semiconductor switch trigger circuit are connected in series to be connected with a combination switch A in parallel. Compared with the prior art, the phase-selection-circuit phase selection switch system and method have the advantages that the phase conversion process is safe and reliable, and occurrence of a short-circuit fault caused when a relay is abnormal and cannot be switched off can be avoided; a current sensor isomitted, relay sections are detected through electron devices, and the product cost can be reduced in aspects of the product material cost and product processing.
Owner:北京波粒智电科技有限公司
Variable frequency starting method and device and storage battery supply
ActiveCN102916627BReduce output powerLow take-off frequencyPolyphase induction motor starterLow loadElectric machine
The invention relates to a variable frequency starting method and device and a storage battery supply. When a load is started to produce huge starting current, due to adoption of a mode of respectively setting the output voltage and the output frequency of a boosting inversion circuit into the voltage and frequency meeting the lowest load starting requirement, the load current rises slowly and slightly till reaching the rated voltage and the rated frequency when the load stably operates, and the increasing range of the load current in the starting process is limited to not exceed a safety range so as to protect a power device in a circuit. Because the onset voltage just can meet the starting requirement of the load and is far lower than the steady-stage voltage when the load operates, the load current in the starting process can be reduced under the condition of certain load resistivity; and the onset frequency calculated according to the onset voltage is also lower, the relative motion between a motor stator and a motor rotor of the load is in slow rise from sharp rise, the output power of the motor is reduced, the load current is reduced immediately, and therefore the purpose of limiting the huge starting current from two aspects is achieved.
Owner:湖南终南山科技发展有限公司
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