153results about How to "Optimize power output" patented technology

A solar array power generation system includes a solar array electrically connected to a control system. The solar array has a plurality of solar modules, each module having at least one DC / DC converter for converting the raw panel output to an optimized high voltage, low current output. In a further embodiment, each DC / DC converter requires a signal to enable power output of the solar modules.

A sonic actuator including a multi-layer membrane having a non-metallic elastomeric dielectric polymer layer with a first surface and a second surface, a first compliant electrode layer contacting the first surface of the polymer layer, and a second compliant electrode layer contacting the second surface of the polymer layer. The actuator further includes a support structure in contact with the sonic actuator film. Preferably, the non-metallic dielectric polymer is selected from the group consisting essentially of silicone, fluorosilicone, fluoroelastomer, natural rubber, polybutadiene, nitrile rubber, isoprene, and ethylene propylene diene. Also preferably, the compliant electrode layer is made from the group consisting essentially of graphite, carbon, and conductive polymers. The support structure can take the form of grid having a number of circular apertures. When a voltage is applied to the electrodes, portions of the film held at the aperture of the support structure can bulge due to the electrostriction phenomenon. The resultant “bubbles” can be modulated to generate sonic vibrations, or can be used to create a variable surface for airflow control.

An inventive energy harvesting apparatus may include a ferromagnetic material and / or a shape memory alloys to convert thermal energy to mechanical energy to electrical energy. The apparatus is subjected to a thermal gradient to cause beams to bend thus creating stress / strain in a piezoelectric material, or creating magnetic flux in a magnetic path. The charges created in this process can be transferred to electrical batteries.

A control system for a wind turbine comprises: a sensor arrangement for capturing measures related to the turbine operation and fatigue accumulation; an upper level controller, which, on the basis of a statistical treatment of said measures, calculates optimized control settings at discrete points of time; a measurement module which processes said measures into instantaneous values; and a lower level controller that receives said control settings and said instantaneous values and calculates instantaneous optimal commands to control turbine actuators. The lower level controller comprises a continuous-time damage model which calculates the rate at which damage is accumulated at any time, and an optimal controller which controls operational states of the turbine, either by directly giving feedback of the instantaneous values to the actuators, or by generating a turbine performance objective function which is continuously optimized by repeatedly solving a receding horizon optimization problem.

A substantially uninterruptible backup power system to provide power to common household appliances comprises a rechargeable battery, a trickle-charging circuit to keep the battery fully charged at all times from the receptacle power, a DC to AC inverter to supply standard AC line voltage from the battery to the lamp, a relay switch, controlled by main power voltage, to switch to the backup system when main power fails, and a timing circuit to optimize a voltage output of the system based on current battery voltage and a desired time period for the voltage output. The system can be set to operate only when the appliance is turned on, which optimizes the current and power required to provide backup power to the appliance for a maximum period of time.

An electrochemical device comprising alternating layers of positive and negative electrodes separated from each other by separator layers. The electrode layers extend beyond the periphery of the separator layers providing superior contact between the electrodes and battery terminals, eliminating the need for welding the electrode to the terminal. Electrical resistance within the battery is decreased and thermal conductivity of the cell is increased allowing for superior heat removal from the battery and increased efficiency. Increased internal pressure within the battery can be alleviated without damaging or removing the battery from service while keeping the contents of the battery sealed off from the atmosphere by a pressure release system. Nonoperative cells within a battery assembly can also be removed from service by shorting the nonoperative cell thus decreasing battery life.

The invention discloses an active optimal control system of a wind and light storage combined power generation system and a method. The active optimal control system comprises a wind and light storage combined power generation system control central station and wind and light storage combined power generation system control substations. The method includes drawing out a power output curve of a wind power station, a photovoltaic power station and an energy storage power station according a planed power output curve and by considering correlated conditions of the wind power station, the photovoltaic power station and the energy storage power station, and distributing correlated plans to all control substations; and working out generation plans of corresponding control units according to power output plans distributed by all control substations, and executing power output plans distributed by control substations finally by the control units. By the aid of the control process, the wind and light storage combined power generation system can be guaranteed to operate according to the force output curve, charge-and-discharge times of storage batteries can be reduced, low current charge-and-discharge of the energy storage power station is avoided, the short-time overload capability of the energy storage power station is fully utilized, and the service life of the energy storage power station is prolonged.

The invention discloses a creep torque control method of an electric vehicle. The method comprises the steps that whether the vehicle starts creep control or not is judged according to creep control parameters; final creep control torque is obtained according to the pressure of a brake master cylinder, the current slope of the vehicle and the current vehicle speed; control is achieved according tothe final creep control torque. According to the method, the power output of the vehicle under a creep function is optimized, so that driving of the vehicle is closer to the intention of a driver. Bymeans of the method, the driving comfort of the driver is improved, so that the starting of the vehicle on a ramp is safer. Meanwhile, the convenience of moving the vehicle is improved so that the vehicle can be conveniently parked and go out of a garage.

The present invention provides, in at least one embodiment, a scheme which is effective in suppressing detrimental coherence effects such as random backscatter. In a fiber laser having a master oscillator power amplifier design, inserting a decorrelator in between the master oscillator and a first power amplifier or inserting a decorrelator in between the first power amplifier and a second power amplifier to reduce random backscatter, which allows for much more energy to be stored and higher gain without the risk of catastrophic optical damage, thus increasing the peak power that can be delivered as useful laser power. Backscattering can be further reduced by having the master oscillator depolarized, injection locked, and spectrally broadened to reduce the coherence length of the master oscillator.

The invention discloses a compact multi-mode valve driving system and belongs to the field of engine valve driving, stroke changing and auxiliary braking. The compact multi-mode valve driving system comprises a first cam shaft provided with a shaft sleeve, a second cam shaft provided with an exhaust braking cam, switching assemblies, a braking switch and the like. The shaft sleeve is provided with an intake four-stroke cam, an intake two-stroke cam, an exhaust four-stroke cam, an exhaust two-stroke cam and two switching grooves. The axial position of the shaft sleeve is controlled through the two switching assemblies, and two-stroke and four-stroke seamless switching is achieved; and the driving modes and the braking modes are switched through only one braking switch. By means of the compact multi-mode valve driving system, the four modes including the four-stroke driving mode, the two-stroke driving mode, the four-stroke braking mode and the two-stroke braking mode are flexibly switched, and high-power, low-oil-consumption, low-emission and efficient graded braking is achieved. The compact multi-mode valve driving system is simple and compact in structure, high in reliability, low in cost and high in response speed.

High voltage DC power, which is produced by rectifying AC power generated by an AC generator, is controlled and regulated without the need for measuring the position of the rotor with hardware. A Field oriented controller uses a sliding mode observer to estimate the position of the rotor without the use of position detection hardware. The estimated position of the rotor and the AC current are then used by the field oriented controller algorithm to regulate a DC output from a rectifier driven by an AC generator.

This invention relates to a variable stroke engine, in addition to its working method, which belongs to vehicle engine technique field. The engine comprises six cylinders, EGR, exhaust-gas turbocharger system, four strokes discharge distributing valve, exhaust duct, bent axle piston and electrical controlling unit. when working, it needs to decide whether the two stroke cylinders join to work with the jar cutting technique according to different power, making the engine switch in different working condition; the six cylinders will bedding-in work through each inlet distribution valve to increase pressure and power output. Said invention can be used in transporting vehicle such as tank armored vehicle, machineshop truck needs to provide large power output and so on.

The invention provides a stable MPPT (Maximum Power Point Tracking) control system and method of a single-stage photovoltaic inverter. The stable MPPT control system comprises a solar panel, a photovoltaic inverter, a power grid and an MPPT controller, wherein the solar panel, the photovoltaic inverter and the power grid are sequentially connected with one another; and the MPPT controller is respectively connected with the solar panel and the photovoltaic inverter. According to the stable MPPT control method, a novel voltage ring controller is adopted and comprises a proportional integral (PI) control module, a pole compensation module and a notching filter module, and the voltage ring controller and a current ring controller adopt a same control period, thus ensuring the operation stability of a single-stage inversion system and guaranteeing the single-stage inversion system to output electric energy with good quality; and an MPPT (Maximum Power Point Tracking) variable-step voltage disturbance method is adopted, a proportional coefficient is regulated to guarantee better dynamic response and steady-state performance of MPPT, and thus the use efficiency of the solar panel is improved.

A control device and a control method for compensating torque adjusting delay of a wind generating set are provided. The control device comprises the wind generating set, a pitch control mechanism, a parameter detecting module, a main controller, an overvoltage protecting module and a frequency conversion controller. By the adoption of the control method for compensating the torque adjusting delay of the wind generating set, the influence of torque adjustment on a whole machine is reduced. On one hand, a feed forward link is added in the control device and the control method, thereby greatly removing the delay caused by torque control and the influence of a random wind speed on quality of system control, optimizing power output of the set and improving responding speed of a subsystem controlled by a fan; on the other hand, a damper is added so as to reduce influence of load impact on a set transmission chain. By means of the control device and the control method for compensating the torque adjusting delay of the wind generating set, responding delay of the wind generating set caused by the torque control and the impact on transmission chain loads can be reduced.

The invention relates to a double-power-generation type intelligent self-adaptation vibration reduction wind turbine. The double-power-generation type intelligent self-adaptation vibration reduction wind turbine comprises self-adaptation vibration reduction wind power blades, a hub, a cabin, a tower and a center control unit. Each self-adaptation vibration reduction wind power blade comprises blade damping piezoelectric webs, blade damping piezoelectric rib plates, double-curved-surface damping piezoelectric generators, blade porous regulation and control devices, blade vibration sensors, a skin, a blade root part and a blade tip part, wherein the blade damping piezoelectric webs are assembled at the positions, close to the middle portion of the blade, in the blade or / and other positions, the double-curved-surface damping piezoelectric generators are arranged in the blade, and the blade damping piezoelectric rib plates are assembled at the positions, close to the blade tip part and the blade root part, in the blade. The wind turbine comprises a wind power piezoelectric power generation work module and a wind power generator power generation work module. The purpose that the too large vibration of the blades is reduced to maintain the safety work of the blades can be intelligently achieved, the too large energy of blade vibration can be absorbed to generate piezoelectricity for power generation, and the power generating amount of the wind turbine is increased.

The invention discloses a wind power plant optimal control method based on a wake flow effect. Based on a Jensen wake flow model, wake flow air speed influence factors are analyzed, the wind turbine thrust coefficient is finally determined, and power output of a wind turbine can be optimized; and in particular, according to the wind turbine wake flow characteristic, a wind turbine wake flow speed stacking model is built, a numerical fitting method is then used for conducting numerical fitting on the wind turbine thrust coefficient and the wind-power utilization coefficient, fitting results are joined with the Jensen wake flow model, a wind turbine output power model is refined, and an optimal model of the wind turbine output power model is obtained. By means of the wind power plant optimal control method, a visualization method can be used for detecting change conditions of the wind power plant total output power at different wind speeds after a control optimization algorithm is added, and the effectiveness of the control algorithm is indicated compared with the total output power in the natural state.

A system and method to enable vibration mediated communication between electrical devices such as photovoltaic solar panel controllers. The electrical devices may be connected to a mesh network with individual router devices. The individual router devices will send and receive data packets by creating or detecting vibrations in a solid vibration conducting media (such as the solar power wiring) that connects the individual electrical devices. Often at least one centralized control device is used to periodically request sensor data packets from the individual router devices and electrical devices. When the electrical devices are photovoltaic solar arrays, the centralized control device may, for example, be used to compute the proper adjustments for the solar arrays that will optimize the overall power output from the photovoltaic solar array. The control device will then send adjustment data packets back to the individual router devices through the mesh network, thus optimizing overall power output.

A semiconductor substrate for a solar cell, comprising the semiconductor substrate having a surface which constitutes a light incident face of the solar cell and having a surface irregularities structure, wherein the surface has an surface area from 1.2 to 2.2 times that of an imaginary smooth face and the standard deviation of the heights of the irregularities is 1.0 μm or less.

A power plant (1) having two engine groups (10, 20) and a main gearbox (MGB) (2), and a rotary wing aircraft (30) having such a power plant (1). Each engine group (10, 20) drives said MGB (2) mechanically to rotate a main outlet shaft (3) and, consequently, a main rotor (31) of said aircraft (30) at a frequency of rotation NR. A first engine group (10) has two main engines (11, 12) and is by a first setpoint NR* for said frequency of rotation NR, while a second engine group (20) has one secondary engine (21) and is regulated by a second setpoint W1* for power from said second engine group (20). The first engine group (10) is also regulated by a third setpoint W2f* for anticipating power such that said first engine group (10) and said second engine group (20) deliver the power needed at said main rotor (31).

The invention provides a control method of an engine output torque, a control device of the engine output torque and an automobile, and relates to the technical field of electronic control. The control method comprises the steps that a current engine speed, a current output torque and a current water temperature when an engine of the automobile is in service are acquired; when the current water temperature is greater than a preset water temperature maximum threshold, a torque threshold corresponding to the current engine speed is acquired; and when the current output torque is greater than the torque threshold, the current output torque is adjusted to the torque threshold. By adjusting the current output torque of the engine, the power output of the engine can be controlled, and the heat dissipation capacity of the automobile can be adjusted according to different service environments, so that the heat dissipation capability and the power output of the engine are improved effectively.

The invention discloses a flexible AC / DC area, which comprises an EMS and a plurality of areas, wherein each area is internally provided with an AC / DC converter; an AC incoming line of each AC / DC converter is connected to a distribution transformer low-voltage side of the corresponding area; DC outgoing lines of the AC / DC converters of all areas are interconnected; and the EMS collects real-time electrical parameters and operating status of the areas, monitors the AC / DC converters in the areas and adjusts control modes and power flow adjustment targets of the AC / DC converters. The invention further discloses a corresponding scheduling control strategy. The scheduling control strategy can realize the effect that the flexible AC / DC area operates in operating modes such as power constraint, fault isolation, fault current limiting, AC supporting, AC transfer and DC transfer, improves the controllability, operation flexibility and power supply reliability, can optimize power output of the areas during power flow adjustment, and improve the efficiency of the areas.

This invention relates to the cooling of the engine of the engine of a locomotive, especially to the pump pumping cooling air, such as the driving device of a fan, the unit assembly of its driving system is composed of a drive shaft assembly, a mid wheel assembly, fan driver assembly and a fan assembly, the fan driver assembly includes a box, an upper flange, a flange connection disk, the mid wheel assembly includes a base fixing frame and a support, the fan driver assembly also includes a gear shaft set in the box and the flange connection disk, a fan connector and a small cone gear fixed on the gear shaft, a big cone gear tothed with the small one and a magnetic clutch is possible mounted between the flange connection disk and the fan connector.

The invention relates to a control method of methyl alcohol flexible fuel vehicle and a system thereof. The system comprises a mixed fuel feeding system, an electronic control system and an engine, wherein, mixed fuel in a mixed fuel box comprises methyl alcohol and auxiliary fuel as the balance. A fuel recognition sensor is used for recognizing methyl alcohol content in fuel, corresponding data is transmitted to a data processing unit, the data processing unit analyzes the data and transmits a result to a central control unit, and the central control unit chooses a corresponding working module to adjust the corresponding control parameter, which ensures that the engine works at the optimum state. The invention mainly provides a control system of a methyl alcohol flexible fuel vehicle, which can add mixed fuel at any ratio to the mixed fuel box, needs no additives, has favorable starting performance and high dynamic property and discharges cleanly. The invention solves the technical problems that the fuel supply is out of control because of methyl alcohol-petrol mixed fuel delamination and vehicle starting performance is lowered in the prior art.

The invention discloses a heat-resistant coating layer with uniform and ordered pore sizes for a lithium ion battery separator and a preparation method of the heat-resistant coating layer. The heat-resistant coating layer is of a porous structure, wherein the average pore size of the heat-resistant coating layer is 600-700 nanometers, the concentrated distribution ratio of micropores with pore sizes being 500-800 nanometers is more than or equal to 60%, and the uniform and ordered pore sizes are obtained by processing for 3-30 minutes in a pore formation environment with a temperature being 30-90 DEG C and relative humidity being 60-100%. The pore sizes of the heat-resistant coating layer are uniform and ordered, and the porosity and air permeability of a composite separator can be prevented from being seriously reduced; and when the heat-resistant coating layer is applied to a lithium ion battery, the lithium ion battery can have excellent energy output, power output, safety and cycle property.

The invention discloses an engine-driven generator set which comprises an engine, a generator, an induced air shell and a soundproof box, wherein the engine is coaxially connected with the generator and is arranged in the soundproof box; the induced air shell is divided into two cavities through a middle clapboard, the front cavity is connected with a motor bracket at the tail end of the generator, and a fan is arranged in the rear cavity; an exhaust cavity is formed in the soundproof box; and an exhaust silencer is arranged in the exhaust cavity, and one end of the exhaust silencer is connected with the engine through an exhaust pipe. A ventilation channel is arranged in a manner that for the first ventilation channel, cooling air outside the soundproof box cools the engine and then enters the exhaust cavity; for the second ventilation channel, cooling air outside the soundproof box cools the generator and is blown into the exhaust cavity; and for the third ventilation channel, hot air in the soundproof box is blown to the exhaust cavity through an air outlet in the side wall of the cavity. According to three ventilation channels, the exhaust silencer in the exhaust cavity is further cooled, and the air is mixed with exhausted air of the engine and is exhausted into atmosphere through the corresponding air outlet in the soundproof box.

A method and corresponding arrangement are provided for determining pitch angle adjustment signals for adjusting a pitch angle of a rotor blade connected to a rotation shaft of a wind turbine. The method includes obtaining a first maximal speed signal indicative of a first desired maximal rotational speed of the rotation shaft. The method also includes deriving a first pitch angle adjustment signal based on the first maximal speed signal. The method further includes obtaining a second maximal speed signal indicative of a second desired maximal rotational speed of the rotation shaft different from the first desired maximal rotational speed of the rotation shaft. Further, the method includes deriving a second pitch angle adjustment signal based on the second maximal speed signal. The second pitch angle adjustment signal is different from the first pitch angle adjustment signal.

The invention provides a method for controlling a permanent magnet direct current brushless without hall motor, comprising the following steps of: measuring a three-phase counter electromotive force of the motor and starting the motor; measuring a phase voltage of any phase in a PWM (Pulse Width Modulation) signal dead zone period of the one phase of bridge arm in a driving circuit of the motor so as to obtain a zero crossing point of phase current of the phase to further determine the time required when the phase current passes through a 360-degree electrical angle; and carrying out three-phase voltage sine pulse width modification (SPWM) on the motor so as to control the motor. Correspondingly, the invention also provides a device for controlling the permanent magnet direct current brushless without hall motor. After the motor is started, the phase voltage of any phase is measured at the PWM signal dead zone period of the one phase of the bridge arm of the driving circuit of the motor to finally obtain the time required when the phase current passes through the 360-degree electrical angle, and then the motor is controlled by using a three-phase SPWM method. In the invention, the motor is controlled on the basis of the existing conditions without extra hardware resources; and the invention is simple and reliable and has good controllability and low cost.

The invention discloses a high-beam-quality high-power output combining device of a semiconductor laser. The combining device comprises N combining subsystems and a grating pair for combining sub beams outputted by the N combining subsystems. The combining subsystems include semiconductor laser stacks, fast-axis collimating mirrors, slow-axis collimating mirrors, transforming lenses, first gratings, and output mirrors, wherein the fast-axis collimating mirrors, the slow-axis collimating mirrors, the transforming lenses, the first gratings, and the output mirrors are arranged successively alongthe light path directions of emitted light of the semiconductor laser stacks. The grating pair includes a second grating and a third grating that are parallel with each other. According to the invention, an outer cavity and a semiconductor laser rear cavity surface form an outer-cavity semiconductor laser, so that different combining units are locked at different wavelengths; because of the dispersion effects of the gratings, laser beams emitted by all semiconductor laser stacks are overlapped in space to form one beam output, so that the output power is improved and the good beam quality level is kept; and the beam quality after combination is improved substantially and the high-power high-beam-quality combined beam outputting is realized.