191results about How to "Guaranteed output power" patented technology

The invention discloses a speaker module which comprises an outskirt frame and a speaker single body. A sound outlet is arranged in a side of the outskirt frame. An opened end which communicates the interior of the speaker module and the outside is arranged in the outskirt frame. The opened end is sealed and combined with a combination plate inside the electronic device. The outskirt frame, the combination plate and the speaker single body form a front sound cavity and a rear sound cavity. The front sound cavity and the rear sound cavity are of spaced structures. Meanwhile, the invention discloses an electronic device. The combination plate sealed and combined with the opened end is arranged in the electronic device. With such a structure, a thin speaker module can be ensured and the acoustic performance and output power of the speaker module can be ensured. A space in the electronic device is fully used and achievement of the thin electronic device is benefited.

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 relates to a millimeter wave sensor and an intelligent detector. The millimeter wave sensor includes a signal generator, a transceiver integrated chip, a bandpass filter, an amplifier, an A/D converter and a digital signal processor connected in sequence. Compared with the existing 24/77GHz millimeter wave sensor, the millimeter wave sensor has higher signal frequency, strong beam directivity, strong anti-interference ability, small size and light weight; in addition, it adopts the transceiver integrated chip based on SiGe process Compared with the sensor composed of discrete devices, it has the advantages of simple structure, small size and portability, convenient mass production, and low cost, which greatly improves the adaptability of the sensor and provides strong technical support for the increasingly complex information detection environment in the future.

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 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 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 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 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 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 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.

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.