192results about How to "Guaranteed output power" patented technology

The invention relates to the technical field of power sources, and discloses a high-power LDO circuit without externally setting a capacitor, wherein the high-power LDO circuit provided herein is characterized in that the high-power LDO circuit is constituted of an error amplifier EA, an operational amplifier OP, two capacitors C1 and C2, three resistors R1, R2 and R3 and on N-type MOS pipe; the C2 is a built-in capacitor loaded by a gate end of Mpass of the N-type MOS pipe for reducing dominant pole frequency of a loop circuit of the LDO circuit; and at the same time, the capacitor C1 and the resistor R1 are added on an output end of the error amplifier EA to produce a zero point to offset the influence of the secondary dominant pole, thus ensuring the stability of a system. According to the invention, an internal loop circuit is set to compensate a circuit, thus ensuring that the system can still work stably without externally compensating capacitance at a large amount; and at the same time, by using the NMOS as a power device, the response speed of the system is improved, thus ensuring the output power of the LDO. The high-power LDO circuit provided herein is mainly used for supplying electricity for chips like central processing units with high performance, digital signal processors, programmable logic device and converters with high performance.

The invention relates to a photovoltaic power generation and urban power grid parallel power supply switching device which solves the problems of the existing device that the existing device is complex in structure, high in cost and poor in backflow-prevention performance during parallel power supply and a photovoltaic power supply cannot output the maximum power constantly. The photovoltaic power generation and urban power grid parallel power supply switching device comprises an alternating-current switching unit, a power supply unit, a control unit, a driving circuit, a sampling regulation unit and the like. The alternating-current switching unit is subjected to logic switching control by aid of the pulse width modulation strategy and the digital signal processor (DSP) software phase lock technology. The photovoltaic power generation and urban power grid parallel power supply switching device provides good guarantee for achievement of backflow-free photovoltaic power generation and urban power grid parallel power supply.

The invention discloses a tail gas processing system and method for an anode of a fuel cell, which arranges catalyst having catalytic oxidation function at a tail gas discharge outlet positioned at the outside of a tail gas outlet of the anode of a fuel cell stack, so as to enable fuel in the tail gas of the anode discharged by the fuel cell stack to perform catalytic oxidation reaction with oxygen in the air to oxide the fuel in the action of catalyst. In the case of guaranteeing output power of the fuel cell, the invention prevents pollution caused by fuel in the tail gas discharged to the environment and danger of explosion. Due to adoption of catalyst for catalytic oxidation, compared with the mode of combustion, the reaction condition is mild without high temperature. By adopting the mode of intermittent discharge, oxygen in the air can diffuse to the catalyst section of a discharge tube when not discharge, which provides oxygen for oxidation reaction with the fuel during discharge, and has simple structure and convenient use without special oxygen supplementation system.

The invention provides a photovoltaic module. The module includes four battery string sets and four bypass diodes; the four battery string sets are sequentially connected in series; each of the battery string sets includes multiple battery strings connected in parallel with each other, and each of the battery strings includes multiple battery pieces sequentially connected in series; and each of the battery string sets is correspondingly provided with one of the bypass diodes in parallel, a positive electrode of each of the bypass diodes is electrically connected to a negative electrode of eachof the battery strings of each of the battery string sets, and the negative electrode of each of the bypass diodes is electrically connected to the positive electrode of each of the battery strings of each of the battery string sets. The photovoltaic module is based on the photovoltaic module with a fixed version size, the number of the bypass diodes is increased, when the battery pieces are blocked, the area of the battery pieces that stop working is reduced, and the output power of the photovoltaic module is furthest maintained when occlusion occurs.

The invention provides a pulverized coal feeder frequency converter control system with a low voltage ride-through power supply device and relates to the field of pulverized coal feeder frequency converter control. The pulverized coal feeder frequency converter control system with the low voltage ride-through power supply device aims to solve the problems that when a pulverized coal feeder frequency converter control system encounters low system voltages, a pulverized coal feeder stops running, and changes of rotating speed, changes of torque and changes of power are caused. According to the pulverized coal feeder frequency converter control system with the low voltage ride-through power supply device, three-phase alternative current power energy passes through a second three-phase switch and a first contactor and is fed into a rectification loop formed by a first three-phase inducer and a diode rectification bridge, the three-phase alternative current power energy is transformed to direct current power energy and is stored in a first capacitor and a second capacitor, a BOOST type boost chopper circuit is formed by a second three-phase inducer and a three-phase inverter circuit, the direct current power energy on the first capacitor and the second capacitor can be transformed to direct current power energy with a higher voltage class, and the direct current power energy with the higher voltage class is stored in a third capacitor and a fourth capacitor and is fed into a frequency converter. A pre-charging loop is formed by a second contactor and three resistors of another set, and stable charging for the first capacitor, the second capacitor, the third capacitor and the forth capacitor when a voltage detecting module is powered on initially is achieved. The pulverized coal feeder frequency converter control system with the low voltage ride-through power supply device is applied to pulverized coal feeder control systems of boilers.

The invention discloses a dual-fuel spraying internal-combustion engine accomplishment method and device of alcohol liquid fuel and fuel oil, which comprises the following parts: at least one cylinder motor, fuel oil spraying device, state detection device, electronic control unit (ECU) and alcohol liquid fuel spraying device, wherein the alcohol liquid fuel spraying device is set on the motor inlet branch pipe of motor and between air throttle and fuel oil sprayer. The invention adapts a combination device of two independent spraying units to control the proportion of fuel oil and alcohol liquid fuel according to the different running condition. When the automobile starts or accelerates, the device will reduce the alcohol proportion. When the load runs stably, the device increases the alcohol proportion to guarantee the motor power output and dynamic property, which affirms the automobile accelerating ability and driving ability.

The invention discloses a radio frequency power amplifier for Internet of Vehicles communication. The radio frequency power amplifier comprises an input four-path differential phase shift distributionand bias network, a first differential double-stack amplifier, a second differential double-stack amplifier, a third differential double-stack amplifier, a fourth differential double-stack amplifier,an inter-stage four-path differential matching and bias network and an output four-path differential phase shift synthesis and bias network. The core architecture of the invention adopts the characteristics of high power and high gain of a double-stack amplification network formed by field effect transistors in a radio frequency microwave band; and meanwhile, the good parasitic parameter inhibition of the differential amplifier in a microwave frequency band is combined with the good power back-off efficiency characteristic of the two-stage Doherty driving amplification structure, so that thewhole power amplifier obtains good high gain, high back-off efficiency and high power output capability.

The invention provides an active control method of a doubly-fed wind turbine generator set. The method comprises the following steps that step 1, a wind power plant active control system issues an active power instruction Pgive to the doubly-fed wind turbine generator set; step 2, the actual rotating speed Omega r of the doubly-fed wind turbine generator set is measured, the control modes of the doubly-fed wind turbine generator set are switched, and the active power reference value Pref of the doubly-fed wind turbine generator set is set as different power values according to the control modes; step 3, the maximum operation rotate speed pitch angle control system of the doubly-fed wind turbine generator set is set to adjust the pitch angle based on the comparison value of the actual rotating speed Omega r and the maximum operation rotate speed, and therefore the stable operation of the doubly-fed wind turbine generator set is controlled. Compared with the prior art, the active control method of the doubly-fed wind turbine generator set guarantees flexible switching of the active power control modes of the doubly-fed wind turbine generator set under various wind power input conditions, guarantees stable operation, and plays a pivotal supporting role for the wind power plant to participate in management and running of an electrical power system.

The invention relates to a millimeter wave sensor and an intelligent detector. The millimeter wave sensor comprises a signal generator, a transmitting and receiving integrated chip, a bandpass filter,an amplifier, an A / D converter and a digital signal processor which are sequentially connected. Compared with the existing 24 / 77GHz millimeter wave sensor, the millimeter wave sensor provided by theinvention is higher in signal frequency and has the advantages of high beam directivity, high anti-interference ability, small size and light weight. In addition, compared with a sensor formed by discrete devices, the millimeter wave sensor adopting the transmitting and receiving integrated chip based on a SiGe process has the advantages of simple structure, small size, portability, convenient mass production and low cost, greatly improves the adaptability of the sensor and provides powerful technical support for the increasingly complex information-based detection environment in the future.

The invention provides an impedance matching method. The method comprises the following steps of: in a process time slot, reading the output value of a sensor in a state that a radio frequency power source output power is zero, wherein the output value serves as the static reference value of a sensor output model in the subsequent process; in the process, acquiring the practical load impedance according to the sensor output model, the static reference value and the sensor output, and adjusting an adjustable impedance element in a matcher so as to realize the impedance matching in plasma processing equipment; and repeating the steps until the whole process is finished. The invention also provides the plasma processing equipment. The impedance matching method and the plasma processing equipment can stably, effectively and accurately realize the impedance matching in the plasma processing equipment, so that the reflection power on a radio-frequency transmission line is relatively low andthen the radio frequency power source output power is applied to a plasma technical chamber more effectively.

The invention discloses a mobile solar three-level terminal box, which comprises a supporting leg frame, a box body, a cover body and a door body. The cover body is fixedly covered on the top end of the box body; one edge of a door frame of the box body is in movable hinge connection with one side edge of the door body; and the other side edge of the door body is connected with the other edge of the door frame of the box body through a door lock during closing. The upper side of the cover body or the two sides and the back side of the cover body are respectively provided with a solar cell panel. The top end of the supporting leg frame is provided with a rotating platform for fixing the bottom end of the box body. The rotating platform is internally provided with an L-shaped step for accommodating and fixing the bottom end of the box body. The box body is internally provided with a solar control unit, a wiring unit and a storage battery from the up down. A support bench is arranged between the rotating platform and the bottom end of the supporting leg frame and is close to the bottom end of the supporting leg frame. The support bench is provided with a winding disc for coiling powertransmission lines. The mobile solar three-level terminal box is convenient to move and safe to use, and can ensure requirements of solar output power, outdoor power utilization and distribution.

The invention relates to a seawater desalination system driven by combination of solar energy and ocean thermal energy. The seawater desalination system comprises a heat source circulating loop, a power circulating loop, a cold source circulating loop and a seawater desalination loop. The power circulating loop comprises an organic turbine utilizing cycle working fluids to act. The heat source circulating loop comprises a warm water pump for pumping warm seawater. The output end of the warm water pump supplies the heat source for evaporating cycle working fluids through an evaporator. The cold source circulating loop comprises a cold water pump for pump cold seawater. The output end of the cold water pump the cold source for condensing the cycle working fluids through a condenser. The seawater desalination loop is a reverse osmosis desalination system which comprises a high-pressure pump and a reverse osmosis device. The power output end of the organic turbine is connected with the drive shaft of the high-pressure pump. Solar energy collectors are disposed in the heat source circulating loop or the power circulating loop. The solar energy collectors are connected between the warm water pump and the evaporator or between the evaporator and the organic turbine.

The invention discloses a power amplifier which comprises a first resistor, a choke inductor, a first transistor, an input coupling circuit and an output coupling circuit. The first resistor, the choke inductor and the first transistor are connected between the power source end and the ground in series. The input coupling circuit is connected between the input end of the power amplifier and the grid electrode of the first transistor. The output coupling circuit is connected among the output end of the power amplifier, the chock inductor and a first middle node of the first transistor. The power amplifier further comprises a biasing circuit connected with the grid electrode of the first transistor, so that a working point of the first transistor changes along with the change of the supply voltage. According to the power amplifier, the voltage resistant requirement of the first transistor can be lowered, the direct current component of an output signal of the first middle node of the first transistor is approximately equal to a half of the supply voltage so as to ensure the output power of the power amplifier, and reliability and linearity can be improved.

The invention discloses an airphibian with a retractable rotor and a control method of the airphibian with the retractable rotor. The airphibian comprises an airphibian body, an engine, a rotor module, a variable-collective-pitch module, two front wheels, a horizontal power module and a control module, wherein the rotor module comprises a propeller hub, two propeller blades, a propeller hub spindle, a rotating spindle, a moving ring, a first hydraulic push rod, a second hydraulic push rod, a self-locking ring and at least two self-locking fasteners and is used for making the rotor ascend or descend into a cavity at the upper end of the airphibian body; the variable-collective-pitch module comprises a variable-pitch supporting arm, a variable-pitch motor, a threaded rod and two pull rods and is used for adjusting an inclination angle of the two propeller blades; the horizontal power module comprises two horizontal power units and is used for providing horizontal power during air-ground dual purposes of the airphibian, and each horizontal power unit comprises a ducted fan back wheel, a connecting pipeline, a tee pipe fitting, a folding gear, a folding motor, a drive motor module and a transmission mechanism. The airphibian with the retractable rotor is simple to implement and reliable to operate and has high practical value.

The invention belongs to the technical field of wind power plants and discloses a wind power plant optimizing dispatching method for reducing mechanical loss of wind generating sets. The method includes the steps that firstly, numerical simulation is carried out under different wind conditions and different loading conditions to acquire the frequency of cyclic loading applied on different major parts under the different loading conditions; secondly, the cycle frequency generated when materials of the major parts are damaged under the different loading conditions is worked out, and then unit relative damage values of the major parts under the different loading conditions are acquired based on the linear cumulative damage theory; thirdly, optimizing calculation is carried out on combination and dispatching of wind generating sets in a wind power plant through the particle swarm optimization algorithm to obtain a combination of the wind generating sets in the wind power plant where mechanical damage of the major parts of the wind generating sets is smallest. According to the method, through reasonable combination and dispatching of the wind generating sets, output power is guaranteed, adverse effects of start, stop, switching and the like of the wind generating sets on the service life of the wind generating sets are reduced, and the operating cost of an electric system is reduced.

The invention provides a novel high-voltage-side inductive-electricity-taking power-supply device which includes an electricity taking module and an electric-energy conditioning module. The electricity taking module includes a primary bus, a current transformer magnetic core, a secondary coil and a sampling resistor. The electric-energy conditioning module includes a rectifying circuit, a transformer discharge circuit, a resistance discharge circuit, a ripple-wave filtering capacitor, a voltage-stabilizing circuit, an STM8 single-chip microcomputer control system and a circuit switching relay. The novel high-voltage-side inductive-electricity-taking power-supply device is capable of using electric energy which is obtained through induction when the current transformer is unsaturated and also capable of using peak electric energy which is obtained through induction when the current transformer is unsaturated to supply electric energy to a rear-end load so that power consumption of the resistance discharge circuit is reduced and power-supply efficiency is improved and output power of the power supply after a magnetic core of the current transformer enters deep magnetic saturation is ensured.

The invention relates to an air purification and sterilization system of enclosed spaces. The air purification and sterilization system of the enclosed spaces comprises an air flow channel, ultraviolet sterilization modules, ultraviolet irradiance sensors and a controller, wherein the air flow channel communicates with the enclosed spaces, and is provided with air inlets, air outlets, and air flues formed between the air inlets and the air outlets; the ultraviolet sterilization modules are provided with ultraviolet light sources arranged in the air flues; the ultraviolet irradiance sensors arearranged in irradiation ranges of the ultraviolet sterilization modules; the controller is connected with the ultraviolet irradiance sensors and the ultraviolet sterilization modules; and the controller has a preset power value, and by comparing the ultraviolet irradiance monitored in real time and the preset power value, power output of the ultraviolet light sources is adjusted. Circular continuous sterilization and air purification are formed between the air purification and sterilization system of the enclosed spaces and the enclosed spaces, man-machine symbiosis can be achieved, disinfection is conducted in real time, and sterilization power is adjusted intelligently and controllably according to the working conditions.

The invention relates to the field of ship propelling systems and discloses a pull type full-rotation electric power pod propelling system for a ship. The pull type full-rotation electric power pod propelling system comprises a streamlined pod shell arranged outside a ship body. A fixed-pitch propeller is arranged at the front end of the outer part of the pod shell and is of a pull type structure. A main propelling motor with the speed under frequency control is arranged in the pod shell, and a shaft of the main propelling motor is directly connected with the propeller. The upper end of the pod shell is connected with a rudder shifting system. The pod shell can horizontally rotate within 360 degrees along the axis of a pod, and vector control is achieved through the rudder shifting system. The main propelling motor is installed in the streamlined pod, and the motor shaft is used for directly driving the propeller so that the integral propelling efficiency can be improved, the vibration of the ship body can be reduced, control can be flexible, and the cabin space can be saved.

The invention discloses a manufacturing process of a pre-crosslinked photovoltaic module and the photovoltaic module. The manufacturing process of the pre-crosslinked photovoltaic module comprises thefollowing steps: S10, compounding a colored EVA film and a transparent EVA film to form a composite packaging adhesive film layer; S20, correspondingly setting a non-cell coverage area and a cell coverage area on the composite packaging adhesive film layer through division according to the distribution position of a cell; and S30, carrying out pre-crosslinking on the non-cell coverage area on thecomposite packaging adhesive film layer. According to the manufacturing process of the pre-crosslinked photovoltaic module, the non-cell coverage area in the composite packaging adhesive film layer is pre-crosslinked, so that the fluidity of the part of the adhesive film during lamination is reduced, the problem that the module power is reduced due to the fact that the surface of the cell is shielded by a colored adhesive film is avoided, and the output power of the photovoltaic module is effectively guaranteed.

The invention discloses a millimeter wave power amplifier for an automobile radar transceiver. The millimeter wave power amplifier comprises an input pre-distortion linear differential amplification network, a first final-stage high-power amplification network, a second final-stage high-power amplification network and an output differential-to-single-ended matching network; the core architecture of the invention adopts a two-path synthesized final-stage high-power amplification network which has the characteristics of high power, high efficiency and high gain in a millimeter wave frequency band; and meanwhile, the high-frequency parasitic parameter suppression characteristic of the differential amplification structure is utilized, and the analog pre-distortion linearization technology of the input pre-distortion linearization differential amplification network is combined, so that the whole power amplifier obtains good high gain, high efficiency, high linearity and high power output capability in the frequency band of automobile radar application.

The invention discloses an AC stacked power amplifier for a wireless terminal. The power amplifier comprises an input matching single-ended to differential power supply network, an AC three-stack amplification network and an output matching differential to single-ended power supply network. According to the invention, the core architecture of the power amplifier adopts the AC three-stack amplification network, and has the characteristics of high power and high gain at low power supply voltage; and meanwhile, the good parasitic parameter inhibition of the differential amplifier in the microwavefrequency band is combined with the power synthesis characteristic of the transformer network, so the whole power amplifier obtains good high gain, high efficiency and high power output capability.

The invention provides an energy-saving gas engine. A pressure stabilizer, a gas pressure control valve, an electronic control unit, a temperature sensor and an oxygen concentration detecting sensor are arranged, the concentration of input air and oxygen can be controlled in real time according to exhaust port temperature data and oxygen concentration data, and therefore closed-loop control can be achieved, and more intelligent control is achieved. Sufficient combustion of gas is guaranteed, pollution caused by insufficient combustion is prevented or insufficient output power caused by excessive combustion is prevented. A phase sensor is further arranged, it can be guaranteed that ignition is conducted when a piston of the engine reaches the maximum compression point, insufficient combustion is prevented, and fuel is saved. A load detection module is further arranged, the pressure of mixed gas is adjusted in real time according to the load situation, closed-loop control is achieved, the energy-saving gas engine is more intelligent, and output power is guaranteed.

The invention relates to the technical field of heat transferring, in particular to a heat insulating coating. The heat insulating coating comprises a heat insulating layer and a heat isolating layer. One side of the heat isolating layer is connected with the inner surface of a piston combustion chamber, and the other side of the heat isolating layer is coated with the heat insulating layer. The heat isolating layer comprises a foam metal framework and stuffing. Holes of the foam metal framework are filled with the stuffing. The inside porous structure of the foam metal framework of the heat isolating layer is arranged and used, and the stuffing with the characteristics of low heat conductivity and low heat capacity is fixed in the holes, so that the heat insulating coating has the good following performance to the environment, the negative effects of the continuous high-temperature surfaces of common heat insulating materials to the air exchange process are overcome, the requirement that the heat insulating coating of which the coating surface temperature is capable of rapidly adapting to environment changes of an internal combustion engine working in an intermittent mode is met, heat carried away by internal combustion engine cooling is reduced, the heat loss in the combustion chamber is reduced, the heat efficiency of the internal combustion engine is improved, and the air inlet amount and power output of the internal combustion engine are ensured; and the foam metal framework is used by the heat isolating layer, the heat load of high temperature parts is reduced, and the service life of the internal combustion engine is prolonged.

The invention discloses an alternating current stacked power amplifier. The power amplifier comprises an input matching single-ended-to-differential power supply network, a differential alternating-current stacked amplification network and an output matching differential-to-single-ended power supply network. According to the invention, the core architecture adopts the differential alternating current stacked amplification network, so that the characteristics of high power and high gain at low power supply voltage are realized; and meanwhile, the good parasitic parameter inhibition of the differential amplifier in the microwave frequency band is combined with the power synthesis characteristic of the transformer network, so that the whole power amplifier obtains good high gain, high efficiency and high power output capability.

The invention relates to a device for automatically adjusting the power of a turbine pump. The device comprises a lift valve arranged outside a turbine air inlet casing, an air inlet valve arranged in the turbine air inlet casing, and an inlet chamber control channel and an outlet chamber control channel which are used for connecting an air inlet valve oil circuit and a lift valve oil circuit. The device solves the technical problem that the jet pipe and air inlet passage of an aspirated engine, which works under large airspace, high Mach number and large-scale variable working conditions, are difficult to adjust, ensures that the output power of the turbine pump is within a rated value range and improves the processing and assembly manufacturability of the turbine pump.

The invention discloses a high-efficient power amplifier for Internet of Vehicles communication. The high-efficient power amplifier comprises an input single-ended to differential power distribution phase shift network, a first self-biased three-stacked amplification network, a second self-biased three-stacked amplification network, a third self-biased three-stacked amplification network, a fourthself-biased three-stacked amplification network and an output differential to single-ended power synthesis phase shift network. According to the invention, the core architecture adopts the characteristics of high power and high gain of a self-biased three-stack amplification network formed by heterojunction bipolar transistors in a radio frequency microwave band; and meanwhile, the good parasiticparameter inhibition of the differential amplifier in the microwave frequency band is combined with the good power back-off efficiency characteristic of the Doherty amplification structure, so that the whole power amplifier obtains good high gain, high back-off efficiency and high power output capability.

A hybrid vehicle provided with an engine and a motor generator as a power source, comprises a clutch which automatically engages or disengages to cause or interrupt rotation transmission between the output shaft of the engine and the input shaft of a transmission, a power transmission mechanism which transmits power between the input / output shaft of the motor generator and the input shaft of the transmission, and a hybrid control unit which disengages the clutch according to running conditions and drives the motor generator. The clutch is disengaged according to running conditions, and the rotation speed of the motor generator is varied by the transmission to drive the vehicle. In this way, the region in which the motor generator operates efficiently is expanded, and the reduction of fuel consumption by the hybrid vehicle is enhanced.

The invention discloses an all-black solar photovoltaic module and a manufacturing method thereof, and the all-black solar photovoltaic module sequentially comprises a light transmission layer, a first EVA adhesive film layer, a cell array, a second EVA adhesive film layer and a backboard from the top to the bottom. The battery array comprises a plurality of battery pieces arranged in a matrix, wherein each column of battery pieces are sequentially connected into a battery string through an interconnection strip solder strip, and a gap is formed between every two battery pieces in the middle of each battery string; the interconnection strip solder strips in the gaps are connected through a first bus bar which is connected with a second bus bar being perpendicular to the first bus bar in the horizontal direction and penetrating through the back plate; the interconnection strip solder strips at the two ends of the battery string are connected through a third bus bar; the front surfaces of the first bus bar and the third bus bar are completely covered by the black isolating bar; one end of the second bus bar is fixed on the back surface of the first bus bar, and the other end obliquely penetrates through the backboard. According to the invention, a real all-black appearance effect can be achieved, and the quality and the market competitiveness are improved.

The invention provides an improved stepping motor. The improved stepping motor comprises an L-shaped supporting plate, fixed units, a motor set and a fixing bolt. The fixing units are symmetrically arranged at the left end of the L-shaped supporting plate in a movable connection mode, the rectangular sliding groove is formed in the lower end of the L-shaped supporting plate, and the motor set is installed in the rectangular sliding groove of the L-shaped supporting plate in a sliding fit mode. The motor set is fixed to the L-shaped supporting plate through fixing bolts. According to the invention, the problems that an existing motor is mounted and fixed in a wall-mounted manner, so the motor operates to generate great vibration, noise is caused to affect the working environment on one hand, and vibration in the moving process of the motor causes the motor to fall off from a mounted wall body to cause the motor to be smashed on the other hand can be solved; the motor is fixed in a wall-mounted manner, and the output shaft rotates unevenly due to overlarge bearing load of the output shaft, so the output shaft is eccentric in the rotating process, and the transmission effect is affected.