53 results about "Voltage doubler" patented technology

The utility model relates to an electric flame stove, which comprises a case, a driving module, a voltage doubling rectifying module, a burner, a metal shell and a high-voltage transformer, wherein the burner is arranged on the case; the metal shell is arranged in the case and is provided with a containing cavity; the high-voltage transformer is used for being connected with input voltage; the driving module is connected with the furnace end through the high-voltage transformer and the voltage doubling rectifying module, and the high-voltage transformer is located in the metal shell. The influence of a magnetic field generated by the high-voltage transformer on the voltage doubling rectifying unit and the interference of the magnetic field on external electric appliances can be eliminated, meanwhile, eddy current generated by the high-voltage transformer can promote the high-voltage transformer, and then the conversion efficiency of the high-voltage transformer is improved.

The invention discloses an insulation resistance measurement method, a measurement module and an anti-reverse power transmission isolation device, and relates to the field of operation and maintenance of distribution lines, and the key points of the technical scheme are as follows: a control voltage signal is generated according to the voltage demand of the insulation resistance of a test line sent by a user, and a PWM square wave signal with a duty ratio is generated according to the control voltage signal; performing high-frequency voltage transformation and voltage doubling rectification on the PWM square wave signal to obtain a direct-current voltage; calculating a current average value of the measurement loop when each resistance measurement gear is switched; presetting a current coefficient of each resistance measurement gear and weight coefficients of two adjacent resistance measurement gears; and when the current average value is greater than or equal to the product of the current coefficient and the weight coefficient, calculating the insulation resistance value of the measured circuit according to the current average value, the direct-current voltage and the resistance value corresponding to the resistance measurement gear.

The application is suitable for the field of power electronics, and provides a lightweight high-voltage power supply for electric air power propulsion and a design method thereof.The high-voltage power supply comprises an input voltage end, a full-bridge inverter metal-oxide semiconductor field effect transistor, a resonance capacitor, a magnetic integrated transformer group, a plurality of voltage doubler rectifiers, an arc striking suppression resistor, a feedforward constant power feedback control circuit, a current transformer, an overcurrent protection circuit, a load and a driving circuit.The main circuit of the application adopts the structure of full-bridge inverter-magnetic integrated transformer group-voltage doubler rectifier output, without additional addition of resonance inductor, parallel capacitor and output capacitor, so as to reduce the weight ratio of the high-voltage power supply in the electric air power propulsion aircraft;feedforward constant power control and arc striking suppression circuit are used in control, so as to guarantee the stable operation of the high-voltage power supply under the conditions of lightweight and high power density, and finally realize the lightweight and high reliability of the overall electric air power propulsion aircraft.

The invention provides a microwave drive control device. The microwave drive control device comprises a power converter; the first full-bridge inverter circuit is conductively connected with the power converter; the first voltage transformation circuit is connected with the first full-bridge inverter circuit in a conducting manner; the voltage doubling circuit is conductively connected with the first voltage transformation circuit; the magnetron is conductively connected with the voltage doubling circuit, and the magnetron is provided with a lamp filament; and the filament preheating circuit is conductively connected with the power converter and the filament of the magnetron, and the filament preheating circuit is used for preheating the filament before the high voltage is sent to the magnetron and is triggered after the filament is heated to a hot electron emission temperature. Through the filament preheating circuit, the filament can be preheated and then is driven by high voltage, so that the service life of the filament can be prolonged. In addition, the service life of the lamp filament is predicted by detecting the resistance value of the lamp filament and through a curve of the resistance value and the service life of the lamp filament.

The utility model discloses an optical fiber welding circuit, which relates to the technical field of optical fibers, and comprises a power supply, a control module, a voltage doubling module, a current sampling module, a first electrode needle and a second electrode needle, and the control module comprises a control unit and a voltage output unit; when an arc current signal received by the feedback end of an error amplifier in the control unit is increased, the voltage of the output end of the error amplifier is reduced, and when the voltage of the output end of the error amplifier is reduced, the PWM duty ratio output by the duty ratio output end of the control unit is reduced. When the arc current signal received by the feedback end of the error amplifier of the control module is increased, the voltage of the output end of the error amplifier is increased, and when the voltage of the output end of the error amplifier is increased, the PWM duty ratio output by the duty ratio output end of the control unit is increased. According to the utility model, the technical problem of unstable optical fiber welding is solved.

This invention discloses an LLC resonant converter with a wide output voltage range based on a voltage doubler rectifier, applicable to DC fast charging of new energy vehicles. The converter achieves primary-side inversion and secondary-side rectification topology reconfiguration through switch drive signals, enabling wide-range voltage output in four operating modes. The primary side can switch between half-bridge and full-bridge inversion modes, while the secondary side can switch between full-bridge, voltage doubler, and voltage quadruple rectifier modes. This invention reduces diode voltage stress, possesses self-balancing capability of the voltage doubler capacitor, and achieves soft switching across the entire voltage range. Ultra-wide voltage gain is achieved within a narrow frequency adjustment range across the entire voltage range through simple pulse frequency modulation (PFM), allowing the converter to adapt to the charging needs of new energy vehicles with different voltage platforms.

The invention discloses an energy collection and wake-up system of a low-power industrial RFID tag and a control method thereof, the energy collection and wake-up system comprises an energy collection module, an energy storage module, an energy management module, a wake-up control module and an RFID communication module, and the wake-up control module comprises a vibration sensor unit, a displacement sensor unit and a wake-up judgment unit. The energy management module comprises a bridge rectifier unit, a voltage doubling rectifier unit, a multi-path input change-over switch and an energy management chip. According to the invention, the cruising ability is obviously improved, the energy collection efficiency is high, the power consumption is low, the control is accurate, and the industrial adaptability is strong; an IMPINJMonzaR6 ultrahigh-frequency chip and an inverted-F-shaped antenna are adopted, the identification distance reaches 5-8 meters in an unshielded environment, the identification distance is far beyond that of a traditional passive tag (smaller than or equal to 3 meters), and the requirement for large-scale warehouse and long-distance material tracking is met.

The utility model relates to the technical field of negative-ion generators, and discloses a voltage-multiplying rectification type negative high voltage output circuit, which comprises a frequency voltage regulating circuit, a transformer circuit and a multi-stage voltage-multiplying rectification circuit, and is characterized in that a first end of the frequency voltage regulating circuit is connected with a first input end of the transformer circuit and inputs positive direct current voltage, and a second end of the frequency voltage regulating circuit is connected with a second input end of the transformer circuit; the second end of the frequency voltage regulating circuit is connected with the first end of the transformer circuit and the first end of the multi-stage voltage doubling rectifying circuit and inputs negative direct-current voltage; the third end and the fourth end of the frequency voltage regulating circuit are correspondingly connected with the second input end and the third input end of the transformer circuit respectively; the first output end and the second output end of the transformer circuit are correspondingly connected with the first end and the second end of the multi-stage voltage doubling rectifying circuit respectively. According to the utility model, the problems of output voltage drop and easy arc discharge damage after glue filling packaging are solved, and the circuit integration level and the safety are improved.

A high-voltage spiral voltage multiplier includes an outer metal film and an inner metal film which are constructed into a spiral bifilar winding configuration, a first insulating film between the outer metal film and the inner metal film, and a second insulating film between the inner metal film and a further outer metal film adjacent thereto. The outer metal film and the inner metal film are spirally bifilarly wound into N turns of winding, center positions of any two adjacent turns being axially offset by at least a predetermined offset distance.

The utility model provides a portable direct-current high-voltage generator, which relates to the technical field of high-voltage test equipment and comprises a box body, a voltage-multiplying cylinder, a control host, a microammeter and a cable are arranged in the box body, a base is mounted at the lower end of the voltage-multiplying cylinder in a sliding manner, a plurality of guide holes are uniformly distributed in the side wall of the base, and a plurality of supporting legs are mounted on the base in a sliding manner. A guide block is fixedly installed at one end of each supporting leg, a through groove is formed in each guide block, the other end of each supporting leg penetrates through the corresponding guide hole and extends out of the base, a compression spring is arranged between each guide block and the inner wall of the base, and a push rod is fixedly installed at the bottom of the pressure-multiplying cylinder. According to the pressure-multiplying barrel, the supporting legs can automatically stretch out of the base through the gravity of the pressure-multiplying barrel and the matching of the guide rollers and the guide grooves, the pressure-multiplying barrel can be rapidly and stably placed, and the supporting legs can be automatically folded through the arrangement of the compression springs.

The present disclosure provides a voltage doubling circuit including a silicon controlled rectifier (SCR) having a control circuit configured to charge a charging capacitor during a negative alternating current period, and including a storage capacitor that receives a voltage from the charging capacitor during a positive alternating current period, and by charging the storage capacitor from the charging capacitor when the SCR is turned off, the storage capacitor is prevented from exceeding its regulated voltage even if the SCR fails.

The utility model discloses a screen drive circuit of large current, including boost circuit, voltage doubler circuit and two voltage stabilizing circuit, input voltage first to boost voltage, then send into voltage doubler circuit and carry out voltage doubling, then output after voltage stabilizing circuit voltage stabilizing, two voltage stabilizing circuits are first voltage stabilizing circuit and second voltage stabilizing circuit respectively, realized multichannel voltage output under low cost, realize output voltage stabilization through increasing voltage reference chip and MOS pipe, and output current can reach 10mA.

This invention relates to a symmetrical voltage doubler type high-gain DC-DC boost converter, belonging to the technical field of power electronic converters. It solves the problem that traditional symmetrical converters cannot simultaneously achieve simple circuit structure, high boost capability, and electromagnetic interference immunity. This invention combines capacitors, diodes, and coupled inductors in a specific connection method of symmetrical interleaved parallel connection and magnetic integration to form an integrated, miniaturized high-gain conversion unit, balancing structural simplification and performance optimization. This invention is primarily applied in DC power conversion applications with high boost ratios.

The utility model provides a voltage-doubling and current-doubling rectifying circuit of an asymmetric half-bridge AC-DC single-stage converter, relates to an isolation type single-stage PFC technology in the field of power electronics / power conversion, and aims to realize power factor correction and stabilize direct current output. The device comprises a rectifier bridge, an asymmetric half bridge, a transformer, a rectifier circuit, an inductor La and capacitors Cb and Co, wherein the rectifier circuit adopts an innovative voltage-doubling rectifier topology or current-doubling rectifier topology; the voltage source comprises diodes D1 and D2, inductors Lo1 and Lo2 and capacitors C3 and C4, the voltage stresses of the diodes and the inductors are halved and balanced, and the current ripple is small; and the secondary winding comprises diodes D1 and D2 and inductors Lo1 and Lo2, and the current stress of the diodes, the inductors and the secondary winding is halved, so that the loss can be reduced. The converter belongs to double-end conversion and can transmit high power; asymmetric complementary PWM control is adopted, and ZVS soft switching is achieved. The system is simple in topology, easy to control, low in cost and high in efficiency.

The invention discloses a voltage-multiplying driving circuit of a bistable pulse valve and a control method of the voltage-multiplying driving circuit. The voltage-multiplying driving circuit comprises a control module, a battery input module, a capacitance voltage-multiplying module and a pulse driving module, the capacitor voltage-multiplying module comprises a capacitor C1, a capacitor C2, a diode D1, a switching tube V1 and a switching tube V2, the switching tube V1 controls whether the capacitor C2 is charged or not, and the switching tube V2 controls whether the capacitor C1 and the capacitor C2 are connected in series or not; the battery input module is connected with the input end of the capacitor voltage-multiplying module; the pulse driving module is connected with the output end of the capacitance voltage-multiplying module; and the control module controls the on-off of the switching tube V1 and the switching tube V2. According to the invention, the bistable pulse valve can be driven to be switched under a relatively low power supply voltage, and meanwhile, the circuit has the advantage of low standby power consumption.

The application provides an LLC converter and a wide-range voltage regulation method thereof. The LLC converter comprises an input voltage, an input inductor L in , a first half-bridge unit, a second half-bridge unit, a resonant cavity, a transformer, a rectifier circuit, an output capacitor and an output load. The first half-bridge unit is composed of a first switch S1, a second switch S2 and a bus capacitor C1, the second half-bridge unit is composed of a third switch S3, a fourth switch S4 and a bus capacitor C2, the resonant cavity is composed of a resonant capacitor C r , a resonant inductor L r and an excitation inductor L m , and the rectifier circuit is composed of a first rectifier diode D1, a second rectifier diode D2, a voltage doubler capacitor C3 and a voltage doubler capacitor C4. The application can realize soft switching of all power devices in a wide voltage gain range, the switching frequency is fixed at a series resonant frequency, which is beneficial to optimization and design of magnetic elements, and the capacitor voltage of the half-bridge unit in the LLC converter can be self-balanced.

The invention discloses electromagnetic stimulation equipment and a multi-stage boosting device thereof, the multi-stage boosting device is formed by connecting a plurality of basic voltage multipliers, and a plurality of first current direction limiting elements, a plurality of second current direction limiting elements, a first energy storage element and a second energy storage element are used for storing energy to generate direct-current high-voltage electricity for electromagnetic stimulation. Furthermore, the first current direction limiting element and the first energy storage element are electrically connected in series with an external power supply, the first current direction limiting element is connected in parallel with a second current direction limiting element which is opposite to the current limiting direction of the first current direction limiting element, and the second current direction limiting element is connected in series with the second energy storage element; the first current direction limiting element and the second current direction limiting element are conducted or not conducted along with the polarity of the input voltage and are used for switching the current direction so that the external power supply can charge the first energy storage element and the second energy storage element in different periods respectively, the external power supply and the first energy storage element provide charging in the charging process of the second energy storage element, and the cross voltage is two times that of the first energy storage element. And the second energy storage elements are mutually connected in series for output application.

The utility model relates to the technical field of direct current high voltage generator discloses a direct current high voltage generator with protection structure, including generator, the inside of generator is provided with foam board, the inside of foam board is provided with voltage doubler, the surface of voltage doubler is provided with support subassembly, the surface fixed connection of voltage doubler has limit ring, the support subassembly includes fixed block. The utility model discloses through setting up support subassembly, specifically is along voltage doubler with the slide of mounting block downward, makes the movable plate in the inner wall of mounting block and hinged seat and rotates, makes hinged seat expand to the outside, simultaneously promotes the rotation of support plate in the inner wall of fixed block, makes support plate expand outward, then rotates fixed baseplate and adjusts the angle, through three fixed baseplate and ground contact, increase the contact area to improve the stability of voltage doubler when placing, avoid the damage of voltage doubler toppling from accidental collision, and further improve the protection effect when using.

An X-ray source driving circuit and an X-ray generation device using the same are proposed. An objective of the present disclosure is to provide an X-ray source driving circuit having a low possibility of dielectric breakdown and capable of reducing an insulation distance between high voltage circuits, and to provide an X-ray generation device of which the size and weight may be reduced by using the same. To this end, the X-ray generation device includes an X-ray source including a cathode electrode, an anode electrode, and a gate electrode and configured to generate X-rays with a driving voltage applied to each electrode, a first voltage converter including a first transformer and at least one voltage multiplier for multiplying a first voltage output from the first transformer, and a second voltage converter including a second transformer and a voltage multiplier for multiplying a second voltage output from the second transformer.

This invention provides a three-phase inverter transistor negative voltage shutdown circuit, which consists of a PWM control circuit, a push-pull circuit, an isolation transformer circuit, a voltage doubler rectifier circuit, and a voltage regulator output circuit connected in sequence. The PWM control circuit drives the push-pull circuit, which mainly consists of transistors Q1 and Q2. The input of the push-pull circuit is connected to the driving power supply of the three-phase inverter MOSFETs, and the output is connected to the primary side of four transformers. The secondary side of the transformers is connected to a voltage doubler rectifier circuit composed of diodes and capacitors. The midpoint of the series connection of two capacitors in the voltage doubler rectifier circuit is taken as the zero-level point of the three-phase upper transistors of the three-phase inverter. The outputs of three of the transformers are used as the driving power supply for the three-phase upper transistors of the three-phase inverter, and the three lower transistors share a common ground, with the output of the remaining transformer serving as the driving power supply for the lower transistors. Different Zener diodes can be selected to achieve the required negative voltage level. This circuit has the advantages of high flexibility, strong versatility, low cost, and simple circuit structure.

The invention discloses an EMC optimized electric flame stove which comprises a case, an EMI filtering assembly, a power panel, a shielding cover, a transformer, a resonant inductor, a voltage doubling rectifying plate and a burner assembly. The EMI filtering assembly, the power panel, the shielding cover, the transformer, the resonant inductor and the voltage doubling rectifying plate are mounted in the case, and the burner assembly is mounted on the case. The transformer and the resonant inductor are jointly arranged in the same shielding case, the magnetic field excitation directions of the transformer and the resonant inductor are arranged in opposite directions, magnetic fields are counteracted mutually, resonant interference is suppressed mutually, and meanwhile interference energy forms closed loop current in the shielding case, is absorbed by eddy current loss of a metal body of the shielding case and is converted into heat energy to be dissipated. Outward radiation in an electromagnetic wave form is avoided; the basic shielding of the all-metal case, the common shielding of the transformer and the resonant inductor, the independent shielding of the EMI filtering assembly and the local shielding of the electrode needle are combined with the design of a single-point grounding anti-ground loop, the problem of electromagnetic compatibility defects of a traditional electric flame stove is fundamentally solved, and various test requirements of the national electromagnetic compatibility standard are met.

The invention discloses a voltage doubling rectifying circuit and a switching power supply. The voltage doubling rectifying circuit comprises at least two groups of switching networks and a capacitor series bridge arm, each group of switch networks comprises a first three-level switch bridge arm and a second three-level switch bridge arm, the middle point of the first three-level switch bridge arm and the middle point of the second three-level switch bridge arm are used for inputting alternating-current voltage, and the first direct-current output end of the first three-level switch bridge arm and the first direct-current output end of the second three-level switch bridge arm are connected with the positive output end of the voltage doubling rectifying circuit. The second direct current output end of the first three-level switch bridge arm and the second direct current output end of the second three-level switch bridge arm are connected with the negative output end of the voltage doubling rectifying circuit; the third direct current output ends of the first three-level switch bridge arm and the second three-level switch bridge arm are connected with the midpoint of the capacitor series bridge arm; the capacitor series bridge arm comprises a first capacitor and a second capacitor, and the first capacitor and the second capacitor are connected in series and then connected between the positive output end and the negative output end of the voltage doubling rectifying circuit. According to the invention, wide-range voltage output can be realized.

The application belongs to the technical field of power electronic conversion, and discloses a single-switch self-balancing bipolar boost DC-DC converter and a control method, which comprises an input power Vin, a first coupling inductor L1, a second coupling inductor L2, an auxiliary inductor L3, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8, a secondary side voltage doubler capacitor Cx, an energy storage capacitor C1, an auxiliary capacitor C2, a first output capacitor Co1, a second output capacitor Co2, a switch tube Q, a first power switch tube Q1 and a second power switch tube Q2. The application can realize a bipolar output under a single-switch condition and has a high-gain DC-DC converter with a self-balancing characteristic, and can meet the demand for a high-reliability and high-power-density power supply in photovoltaic, fuel cell and direct-current micro-grid occasions.

The invention discloses a voltage-multiplying rectification circuit system, equipment and a power supply control chip, the voltage-multiplying rectification circuit system comprises a voltage-multiplying rectification circuit module used for carrying out rectification processing on an input AC voltage to output a bus voltage, and a converter module used for carrying out DC-DC conversion on an output voltage of the voltage-multiplying rectification circuit module to output a DC voltage, the input voltage sampling circuit module is used for sampling the input voltage of the voltage doubling rectifying circuit module to obtain an input alternating-current voltage instantaneous value, and the gain compensation circuit module is used for performing gain compensation calculation on the input alternating-current voltage instantaneous value to obtain an input alternating-current voltage instantaneous value after gain compensation; and the control module is used for controlling the connection and disconnection of the gain compensation circuit module according to an input alternating voltage peak value, the bus voltage peak value and the working mode of the converter module, and controlling the working mode of the voltage doubling rectifying circuit module.

The invention provides a parameter design method for a photovoltaic direct-current module converter based on efficiency optimization, which comprises the following steps of: improving a current source converter, and adopting a voltage doubling rectifying circuit on a secondary side of the current source converter on the basis of the existing current source converter; loss analysis and device optimization are carried out on the converter on the basis of efficiency optimization by establishing a loss analysis model of the converter, and the efficiency and the power density of the converter are comprehensively considered according to optimization results under different switching frequencies; the optimal design result of the photovoltaic direct current module main circuit based on the current source type half-bridge converter is determined, and the efficiency of the photovoltaic direct current module converter is greatly improved.

The utility model relates to a voltage doubling rectifying unit for an electric flame stove and the electric flame stove, the voltage doubling rectifying unit is electrically connected between a plasma torch and a high-voltage transformer, and the voltage doubling rectifying unit comprises a plurality of diodes and a plurality of capacitors, the diode is a silicon carbide diode packaged by SMA, a silicon carbide diode packaged by SMB, a silicon carbide diode packaged by SMC, a silicon carbide diode packaged by SMD or a silicon carbide diode packaged by SOD. The number of diodes connected in series in an existing voltage doubling rectifying unit can be reduced, the voltage drop after the multiple diodes are connected in series is zero, the fast recovery time is zero, the temperature of components is kept on a balance line in the long-time working process of an electric flame stove, the risk of damage to the components is reduced, and the service life of a voltage doubling rectifying plate is prolonged.

The utility model discloses a kind of bridgeless voltage doubler PFC circuits, the bridgeless voltage doubler PFC circuit includes power factor inductance, switching unit, drive control module, first and second output capacitor and first, second freewheeling diode;Power factor inductance one end connects alternating current power positive pole, the other end is connected switching unit input end, first freewheeling diode anode respectively, switching unit output end connects alternating current power negative pole;First freewheeling diode cathode connects one end of first output capacitor, the other end of first output capacitor connects second output capacitor, the node of first output capacitor and second output capacitor is connected with alternating current power negative pole;The other end of second output capacitor connects second freewheeling diode anode, second freewheeling diode cathode connects first freewheeling diode anode;Drive control module output end connects switching unit control end, and output control signal controls switching device on-off. The utility model does not need rectifier bridge, converts single-phase voltage into high-voltage direct current, and efficiency is high, cost is low.

The invention discloses an adjustable positive and negative high voltage generator suspended on high voltage and a working method thereof, and belongs to the field of electron gun driving and acceleration control in an electron optical system. The master control MCU is connected with the isolation drive DAC I, the isolation drive DAC II, the isolation drive DAC III and the voltage monitoring module, the isolation drive DAC is connected with the operational amplifier, the operational amplifier is connected with the inverter circuits, the inverter circuit I, the inverter circuit II and the inverter circuit III are connected with the operational amplifier processing module, the inverter circuit I is connected with the voltage doubling circuit with the output being HVout-, and the inverter circuit II is connected with the voltage doubling circuit with the output being HVout-. The inverter circuit I is connected with the inverter circuit I, the inverter circuit II is connected with the voltage doubling circuit with the output being HVout, the inverter circuit III is connected with the voltage doubling circuit with the output being HVout +, the voltage doubling circuit with the output being HVout-is connected with the voltage doubling circuit with the output being HVout, the voltage doubling circuit with the output being HVout + and the sampling voltage module, and the sampling voltage module is further connected with the operational amplifier processing module and the voltage monitoring module. The high-voltage power supply is also used for solving the problem that a common high-voltage power supply cannot adjust positive and negative high-voltage generators suspended on high voltage at a low-voltage end.

The utility model relates to the technical field of transformer detection devices, in particular to a test tool for a high-voltage isolation transformer. The device comprises a voltage doubling rectifying device connected to the output end of a secondary coil of a transformer, and a voltage dividing device and a sampling device are sequentially connected between the high-voltage end and the low-voltage end of the voltage doubling rectifying device. According to the testing tool of the high-voltage isolation transformer, boosting is achieved through the transformer and the voltage doubling rectifying device, the voltage dividing device and the sampling device are arranged between the high-voltage end and the low-voltage end of the testing tool, accurate measurement of the output voltage is achieved, and therefore detection of the output high voltage of the testing tool is achieved. Therefore, the performance of the test tool can effectively meet the detection requirements of the current high-voltage isolation transformer.