45results about How to "Improve boost efficiency" patented technology

A boosting circuit comprises a first boosting cell row and a second boosting cell row. The boosting circuit further comprises an analog comparison circuit for comparing the potential of boosting cells on the same stage, and selecting and outputting the lower or higher of the potentials. The potential of an N well is controlled using the output potential of the analog comparison circuit. Thereby, the amplitude of an N well potential can be suppressed, and a single N well region can be shared.

The invention discloses a charge pump and a CMOS image sensor; wherein the charge pump comprises: a boost circuit consisting of a first boost branch circuit and a second boost branch circuit which are connected with the power voltage; the first boost branch circuit and the second boost branch circuit are respectively controlled by a first clock and a second clock, which are a pair of non-overlap clocks with adverse phases, wherein, when the first clock is in the first phase, the first boost branch circuit realizes the boost of the power voltage; when the second clock is in the first phase, the second boost branch circuit realizes the boost of the power voltage; the voltage chooses the circuit, coupling to the first boost branch circuit and the second boost branch circuit, and forms the output of the charge pump through the output of the boost branch circuit of boost power voltage. The charge bump has high conversion rate, smaller waves and smaller area occupied.

An LED backlight driving circuit (10) capable of supplying power to an LED backlight module comprises: a voltage stabilizing circuit (11), for receiving and filtering an input voltage and outputting a voltage-stabilized direct current; a first boost circuit (12) and a second boost circuit (13), respectively connected to the voltage stabilizing circuit (11), for receiving and boosting the voltage-stabilized direct current and outputting the boosted voltage-stabilized direct current to the LED backlight module; and a selection control circuit (14), for alternately selecting the first boost circuit (12) and the second boost circuit (13) to supply power to the LED backlight module. With the LED backlight driving circuit (10), the boosting efficiency of the circuit is improved and the cost is reduced.

The embodiment of the invention discloses a three-phase five-level inverter, which comprises a direct-current unit and a three-phase inversion unit, wherein the first input end of the direct-current unit is connected to the anode of a direct-current power supply; the second input end of the direct-current unit is connected to the cathode of the direct-current power supply; the direct-current unit comprises three output ends, i.e., a two-level output end, a one-level output end and a zero-level output end; the three-phase inversion unit comprises three single-phase five-level full-bridge inversion units; each single-phase five-level full-bridge inversion unit comprises a two-level input end, a one-level input end, a zero-level input end, a first output end and a second output end, wherein the two-level input end is connected with the two-level output end; the one-level input end is connected with the one-level output end; the zero-level input end is connected with the zero-level output end; and the first output end and the second output end are used for outputting the alternating current voltage. According to the three-phase five-level inverter disclosed by the invention, the output voltage is correspondingly improved by one time, the boosting efficiency is improved, the line transmission loss in a medium-voltage transformer boosting process is reduced, and the problem of low boosting efficiency in the prior art is solved.

The invention provides a level transfer circuit. The level transfer circuit comprises a signal input end, a first high-level input end, a second high-level input end, a low-level input end, a pre-output end, a storage capacitor, a pre-charging module and a boost module; a first end of the storage capacitor is connected with the pre-output end, the control end of the pre-charging module is connected with the input end of the level transfer circuit, a first input end is connected with the input end of the first high-level input end, a second input end is connected with the low-level input end, a first output end is connected with a first end of the storage capacitor, a second output end is connected with the second end of the storage capacitor, the control end of the boost module is connected with the input end of the level transfer circuit, the input end is connected with the second high-level input end, and the output end is connected with the second end of the storage capacitor. The invention further provides a driving method of the level transfer circuit, a grid drive circuit and a display device. The level transfer circuit can improve boost efficiency.

The invention provides a direct current (DC)-DC converter, which is suitable for generating power supply voltage needed by a load, and comprises a step-down circuit and a booster circuit, wherein the step-down circuit is used for receiving DC input voltage and performing step-down treatment on the DC input voltage according to a first control signal so as to output the power supply voltage, or directly outputting the DC input voltage; and the booster circuit is used for receiving the power supply voltage or the DC input voltage output by the step-down circuit and performing boosting treatment on the DC input voltage which is output by the step-down circuit according to a second control signal so as to output the power supply voltage to the load, or directly outputting the power supply voltage which is output by the step-down circuit to the load.

The utility model relates to an electric charge boosting circuit, comprising a plurality of diode equivalent networks, at least a boosting capacitance network and at least one reverse current cut-off circuit; wherein the diode equivalent networks are electrically connected in series with each other; a node is arranged between every two diode equivalent networks and each node is responding to a boosting stage; the low-voltage side of the diode equivalent network with the lowest boosting stage is the input of the electric charge boosting circuit and the input receives an input voltage signal; one end of each boosting capacitance network is connected with a node and the other end of each boosting capacitance network is electrically connected with a clock signal; each reverse current cut-off circuit is electrically connected with the diode equivalent network; the reverse current cut-off circuit is provided with at least two break-over channels, which are alternately turned on according to the clock signal switch in each boosting stage.

A boosting circuit comprises a first boosting cell row and a second boosting cell row. The boosting circuit further comprises an analog comparison circuit for comparing the potential of boosting cells on the same stage, and selecting and outputting the lower or higher of the potentials. The potential of an N well is controlled using the output potential of the analog comparison circuit. Thereby, the amplitude of an N well potential can be suppressed, and a single N well region can be shared. Thus, the boosting circuit can suppress reducing electric charge transmission efficiency, and realizing lower electric consumption and cutting down allocation area by controlling N well potential of the switching element having triple well structure.

The invention discloses an active output control method of a two-wire system, and aims at solving the problem that a traditional passive control method needs an external power supply. In the active output control method, a bus supplies power to charge an energy storage capacitor via a charging circuit, the charging process can be controlled in a segmented manner according to the detected voltage of the energy-storage capacitor, the charging current is limited, the capacitance of the capacitor can be determined according to the detected step-up rate of the energy-storage capacitor, and the reliability of active output is ensured. Active output control of the energy-storage capacitor can be realized by controlling ON/OFF of a relay.

The invention provides an onboard airworthiness instrument, comprising a support, a force measuring device and two fans. The support is of an integrated structure, and includes two horizontal beams which are vertically arranged and a vertical beam arranged between the two horizontal beams, two ends of the lower horizontal beam are downwardly vertically provided with lower connecting columns, two ends of the upper horizontal beam are upwardly vertically provided with upper connecting columns, the two fans are arranged on the two upper connecting columns respectively, the two lower connecting columns are connected with the tail of a self-propelled model hull, and the force measuring device is arranged on the vertical beam. The intelligent onboard airworthiness instrument can provide auxiliary power for a ship model, and perform a related hydrodynamic performance test. Since a large-scale self-propelled model is difficult to arrange anchoring equipment under a real sea state, the intelligent onboard airworthiness instrument is high in boosting efficiency, simple and convenient to install, reasonable in structure, low in cost and excellent in test performance, the intelligent onboard airworthiness instrument is of great significance to this kind of tests, and has wide application prospects.

A DC-to-DC converter adapted for generating a power voltage required by a load and including a buck circuit and a boost circuit is provided. The buck circuit is used for receiving a DC input voltage, and outputting the power voltage by performing a buck process to the DC input voltage, or directly outputting the DC input voltage according to a first control signal. The boost circuit is used for receiving the power voltage or the DC input voltage both output from the buck circuit, and outputting the power voltage to the load by performing a boost process to the DC input voltage output from the buck circuit, or directly outputting the power voltage output from the buck circuit to the load according to a second control signal.

The invention discloses a DC boost conversion circuit and device. The circuit comprises a full control circuit, a transformer and an uncontrolled circuit. The full control circuit is composed of a plurality of parallel full control H-bridge circuits. The DC side of the full control circuit is externally connected with DC power, and the AC side of the full control circuit is connected with the uncontrolled type circuit through the transformer. The uncontrolled circuit is composed of a plurality of uncontrolled H-bridge circuits connected in series. The full control circuit is used for converting the DC power to obtain the voltage sharing AC power after voltage sharing and inputting the voltage sharing AC power to the transformer. The transformer is used for boosting the voltage sharing AC power and inputting it to the uncontrolled circuit. The uncontrolled circuit is used for rectifying the boosted voltage sharing AC power and outputting it. The DC boosting conversion circuit can realize voltage sharing of the circuit through a plurality of parallel full-control H-bridge circuits without arranging other components, thus improving the boosting efficiency of the circuit and reducing the volume and the cost of the circuit.

The invention relates to a multi-stage electrochemical hydrogen pump for preparing high-pressure hydrogen. The multi-stage electrochemical hydrogen pump for preparing the high-pressure hydrogen is composed of a fastening end plate, a fastening screw rod, an insulating plate, an electrode plate, a separation fixing plate, a gas-liquid transmission plate, a membrane electrode assembly and the like.The separation fixing plate and the gas-liquid transmission plate form a gas chamber assembly, the inner hole space of the gas chamber assembly directly serves as a gas chamber, the dead volume is reduced, and the safety is improved; the contact area with the membrane electrode is increased, the best support is provided for the membrane electrode, meanwhile, the ohmic impedance is reduced, and theefficiency of the hydrogen pump is improved; the multi-stage electrochemical hydrogen pump is formed by connecting a plurality of hydrogen pumps in series, and step-by-step pressurization is achieved. The structure is simple, machining and manufacturing are easy, large-scale production is facilitated, the cost can be greatly reduced, and meanwhile the assembling procedure and requirements are relatively simple and easy to control. The technology is wide in application range, can be used for small portable mobile hydrogen supercharging equipment, and a large fixed hydrogen refueling station and the like, and can also be used for high-purity hydrogen purification equipment.

The invention discloses a down-hole pumping ring and a down-hole pumping device. The down-hole pumping ring is used for being arranged on the outer side face of a main body of a pumping piece and comprises a ring-shaped main body which is overall of a ring-shaped structure; the inner surface of one end of the ring-shaped main body is in a circular-table shape, and the ring-shaped main body sleevesthe outer side face of the main body of the pumping piece and is flush with the outer side face of the main body of the pumping piece; the inner surface of one end of the ring-shaped main body and the outer side face of the main body of the pumping piece form a circumferential groove, and the other end of the ring-shaped main body is fixedly connected with the main body of the pumping piece; andthe opening direction of the circumferential groove is opposite to the flowing direction of well liquid. When the flowing speed of the well liquid reaches a certain value, the well liquid enters the circumferential groove, the pressure of the interior of the circumferential groove is larger than the pressure of the exterior of the circumferential groove at the edge of the circumferential groove, and thus the pumping ring is spread towards the outer side at an opening of the circumferential groove; and the pushing area of a bridge plug is increased, and thus drilling fluid more effectively pushes a setting tool and the connected bridge plug.

The invention discloses a bionic tail fin method and swimming boosting equipment, relates to a swimming auxiliary device and underwater operating equipment, and particularly relates to swimming and diving equipment, very suitable for water cruise and diving rapid swimming, for a bionic tail fin. A key point of the bionic tail fin method is that a waist, buttocks and shoulders are relied on, but not limited to, to serve as supporting points for left and right legs and feet to exert force; and that is to say, while people kicks the leg and foot at one side of a body hard, a tail fin or a tail web deflects and swings under stress, and at the same time, the leg and foot at the other side naturally retract, and are not involved by the strength of the tail fin, the tail web or the leg and foot at the force exertion side, so that the leg and foot kicking force of the human body is more effectively developed so as to drive the bionic tail fin or the tail web to swing leftwards and rightwards in water and boost a user to move forwards. A main component is formed by main parts of the tail fin, pedal plates, a hinging side plate and a waistband. The swimming boosting equipment disclosed by the invention is simple and light in structure, convenient for operating on the water and below the water, relatively simple in manufacturing technology, and convenient for large-scale production and popularization.

The invention discloses a downhole pumping method. A pumping ring is arranged on the outer side face of a pumping tool or a bridge plug, in the pumping process, the flow speed of drilling fluid reaches a first preset value V1, the drilling fluid enters a circumferential groove, at the edge of the circumferential groove, the internal pressure of the circumferential groove is greater than the external pressure of the circumferential groove, and thus the pumping ring is expanded towards the outer side at an opening of the circumferential groove; and at the moment, the pumping ring is expanded towards the outer side, thus the outer diameter of a setting tool is increased temporarily, that is, the pushing area of the bridge plug is increased, and accordingly, the setting tool and the bridge plug connected with the setting tool are more effectively pushed by the drilling fluid. The pumping process is accelerated, and the time is saved.