90results about How to "Adjustable output power" patented technology

A high-frequency power amplifier system including a plurality of individual amplifiers connected in parallel, the amplifiers including switching-driven FET's. A fixed drain voltage is applied to one amplifier and a variable drain voltage is applied to another amplifier through a section including a DC-DC converter that converts the voltage according to a control value of a control signal. The turning on and off of the operation of the power amplifier is controlled by a control signal. Also, the circuit constants of a matching circuit are variable. In a high output power region, the power amplifier is turned on and, in a low output power region, turned off. Thereby, the decrease of efficiency of the power amplifier, owing to the DC-DC converter, may be suppressed to a minimum. The matching of the amplifier is adjusted when the power amplifier is switched on or off so as to improve efficiency. Consequently, it becomes possible to continuously control the output of the amplifier.

An LED (Light-Emitting Diode) output power adjusting device includes an analog / digital conversion and detection circuit, a computation and control unit, a digital / analog conversion control circuit, and a power supply circuit. The analog / digital conversion and detection circuit is connected to an LED based load to detect a forward voltage thereof and converts the forward voltage into an output of digital signal. The computation and control unit perform evaluation and computation on the digital signal of the forward voltage to obtain a digital current control signal indicating a corresponding current. The digital / analog conversion control circuit converts the digital current control signal into an analog current control signal, which is then fed to a constant current drive circuit of the LED based load to adjust an output power of the LED based load to approximate a constant power condition. The power supply circuit supplies working powers for the analog / digital conversion and detection circuit, the computation and control unit, and the digital / analog conversion control circuit. Also disclosed is an LED output power adjusting method.

A thermally-assisted magnetic recording head is provided, in which a light source having sufficiently high output power for performing thermal-assist is disposed in the element-integration surface of the substrate to achieve improved mass-productivity. The head includes: a light source having a multilayered structure including a photonic-band layer and having a light-emitting surface opposed to the element-integration surface; a diffraction optical element that converges the emitted light; a light-path changer that changes the direction of the converged light; a waveguide that propagates the direction-changed light toward the opposed-to-medium surface; and a magnetic pole that generates write field. The surface-emitting type light source includes a photonic-band layer having a periodic structure in which a light from an active region resonates, and thus emits laser light on a quite different principle from a VCSEL. Therefore, the light source can be disposed in the element-integration surface, even though having sufficiently high output power.

A battery module is provided for a battery system including at least two battery modules, where each battery module is provided with a module monitoring unit arranged to monitor at least one performance related parameter for each secondary cell in the battery module. Parameters relating to the performance for each battery module are stored in a memory on the respective module monitoring unit. An energy storage system with a battery pack including such a battery monitoring unit for monitoring the battery pack and a modular system of battery packs, each including at least two replaceable, interchangeable battery modules is also provided. The energy storage system can further include super- or ultracapacitor modules.

A high frequency power amplifier is provided with a plurality of amplifiers connected in parallel, the amplifiers including switching-driven FET's. A fixed drain voltage is applied to one amplifier and variable drain voltage is applied to another amplifier through a section including a DC-DC converter or the like that converts the voltage according to a control value of a control signal. The turning on and off of the operation of the power amplifier is controlled by a control signal. Also, the circuit constants of a matching circuit are variable. In a high output power region, the power amplifier is turned on and in a low output power region, turned off. Thereby, the decrease of efficiency of the power amplifier, owing to the DC-DC converter, may be suppressed to a minimum. The matching of the amplifier is adjusted when the power amplifier is switched on or off so as to improve efficiency. Consequently, it becomes possible to continuously control the output of the amplifier.

The invention relates to a compound excitation permanent magnet synchronous generator for electric vehicles. An auxiliary electric excitation winding and built-in V-shaped magnetic steel are arrangedin a rotor iron core in the circumferential direction; the built-in V-shaped magnetic steel and a pole shoe form a permanent magnet pole, and the auxiliary electric excitation winding and an interwinding iron core form an excitation pole; the permanent magnet and the auxiliary electric excitation winding together generate armature induction potential, the air gap magnetic field can be adjusted conveniently by adjusting the magnitude and the direction of the DC excitation current in the electric excitation winding, and the purposes of high efficiency, energy saving and high-precision adjustmentof the voltage at an output end are achieved; meanwhile, the permanent magnet rotor is made of the V-shaped segmented magnetic steel, and holes are arranged in the pole shoe to lighten the weight ofthe rotor to avoid the high-speed deformation of the rotor; a groove is formed at the center of the pole shoe in the radial direction, and nonmagnetic good conductors are filled in the groove; and magnetism isolating grooves are arranged at two ends of the V-shaped magnetic steel, thereby inhibiting the static and dynamic armature reaction, improving the output voltage waveform, increasing the airgap magnetic density, reducing the magnetic leakage and increasing the output power. The compound excitation permanent magnet synchronous generator can smoothly operate at high power density, speed and precision.

The invention discloses a wireless charging transmitting system and a wireless charging receiving system. The wireless charging transmitting system comprises a PFC circuit, an inversion circuit, a transmitting coil, an inductively compensated circuit connected in series between the inversion circuit and the transmitting coil, and a first capacitance compensation circuit in parallel connection with the transmitting coil, wherein the PFC circuit, the inversion circuit, the transmitting coil, the inductively compensated circuit and the first capacitance compensation circuit are sequentially connected with an AC power supply. The inductively compensated circuit is provided with an inductance adjustment device which is used for adjusting the size of an inductance value, and the first capacitance compensation circuit is provided with a first capacitance adjustment device which is used for adjusting the size of a capacitance value. According to the technical scheme of the invention, the system can adjust the output power of the wireless charging system.

The invention discloses a low-temperature negative pressure drying method and a low-temperature negative pressure drying device for textile materials and textiles. The device comprises a microwave source, a temperature sensor, a resonant cavity, an air-cooled or water-cooled device, a vacuum sensor, an air release valve, a humidity sensor, an air extraction valve, an air extraction pipeline, a vacuum pump, a vacuum pump motor, a stirrer, a panel, a controller, a shielding sealing door, a shell, an indicating lamp, a switch, a scattered article drying box and a cheese drying bracket; and the scattered textile materials or textiles are put into the scattered article drying box, or cheeses are stacked on the cheese drying bracket and then put into the resonant cavity, and the dried articles are heated and dried under the low-temperature negative pressure working condition. Relatively long bottleneck at the uniform velocity drying stage when single microwave is used for drying can be effectively overcome, over drying is avoided, and the whole drying process is quick and energy-saving; and the method and the device can particularly meet the drying requirements of special animal fibers, artificial fibers, synthetic fibers and like and the products thereof with special temperature requirements.

A parallel motion heat energy power machine and a working method thereof, includes a heat collector, an insulating pipe, a gasification reactor, an atomizer, a cylinder, a piston, a piston ring, an automatic exhaust valve, a cooler, a liquid storage tank, a pressure pump, a push-pull rod, an insulating layer, and a housing. The two cylinders are oppositely arranged on the housing in parallel. The piston is arranged inside the cylinder. The piston is provided with the piston ring. The pistons are arranged on both ends of the push-pull rod. The heat collector is connected to the gasification reactor through the insulating pipe. The atomizer is arranged on the air inlet end of the gasification reactor. The parallel motion heat energy power machine and working method thereof has a high heat-energy conversion efficiency. It is energy-saving, environmentally friendly, and less noisy.

The invention relates to a biomedical wireless energy transmission system. Through adopting a magnetic coupling resonant wireless energy transmission technology, a transmission distance demand of general biomedical implanted equipment is satisfied, wherein in the technology, a farthest transmission distance can reach a meter-level range; a reconfigurable rectifier is realized to work under three working modes of a half-wave rectifier, a full-wave rectifier and a voltage multiplier, and duty ratios of the different working modes are controlled so that transmission efficiency can be guaranteed and simultaneously output power of an internal receiving circuit is adjustable; and different input capacitances of the rectifier under the different working modes can cause a detuning problem of an internal resonance circuit, therefore, a resonance adjusting unit is introduced so that internal and external resonance circuits are at a same resonant frequency, and transmission efficiency is increased. In addition, through a voltage regulation device and an overvoltage protection circuit, a supply voltage of the biomedical implanted equipment is safe and stable.

The invention discloses a LC input series connection output parallel connection direct current transformer with power capable of being adjusted and a control method thereof. The LC input series connection output parallel connection direct current transformer comprises a plurality of LC resonant converter modules and an auxiliary power control bridge arm, wherein an LC resonant circuit open loop works at the resonant frequency to realize zero current on and off. When the power is transmitted in the forward direction, an upper tube of the auxiliary bridge arm is continuously turned off, a diodeis utilized for freewheeling, and a lower tube of the auxiliary bridge arm is turned on at a certain duty ratio; and when the power is transmitted in the reverse direction, the lower tube of the auxiliary bridge arm is continuously turned off, the diode is utilized for freewheeling, and the upper tube of the auxiliary bridge arm is turned on at a certain duty ratio. The power of the whole direct current transformer can be adjusted by adjusting the duty ratio of the upper tube or the lower tube of the auxiliary bridge arm, and thus the power can be adjusted without frequency conversion.

The invention discloses a coal-bed gas seepage experimental device under action of controllable high-power sound wave. The device comprises a coal sample chamber, a gas supply system, a flow measurement system, a vacuum pumping system, a sound wave generation system, a temperature monitoring system and a stress loading system, wherein sealing covers are arranged at two ends of the coal sample chamber, respectively; the sealing covers are detachably connected with the coal sample chamber; the sound wave generation system comprises a sound wave generator and a transducer which is connected with the sound wave generator; the transducer is arranged on the sealing cover; the temperature monitoring system comprises a temperature sensor; the temperature sensor is arranged in the coal sample chamber; the stress loading system comprises a lifting jack and a pressurization tray connected with the lifting jack; the pressurization tray is arranged in the coal sample chamber; an air hole is formed in the pressurization tray. According to the device, the seepage rule of coal-bed gas in large test-piece coal can be simulated under the actions of stress, air pressure and sound field coupling, and a heat effect and the temperature influence range and change rule of a coal-gas system can be simulated under the action of high-power sound wave.

The invention discloses a membrane module realizing the on-line monitoring and control of membrane pollution by using the ultrasonic technology, belonging to the technical field of water treatment. The membrane module comprises a water inlet plate, a membrane wall, a spiral membrane, a water outlet plate, an ultrasonic transducer, a permeate outlet, a condensed water outlet, and an intelligence control system. The membrane module disclosed herein can monitor the membrane pollution in real time, utilizes the effects of ultrasound to destroy the concentration polarization according to a set switch-on strategy, and disturbs and alleviates the formation of membrane pollution, and the cavitation can enhance the effect of membrane cleaning. According to the invention, by using a special mode of using ultrasound, the damage of ultrasound for the membrane material is greatly reduced, the application range of ultrasound is enlarged, the service time of the membrane module is prolonged. The membrane module is suitable for ultrafiltration, nanofiltration, reverse osmosis and the like.

The invention relates to a device and a method for generating clean coal by means of quick total sulfur treatment of coal. Total sulfur in raw coal is subjected to low-temperature negative-pressure treatment by means of vacuum negative pressure combined with microwave heating to quickly remove evaporable harmful substances in the raw coal, and pyrite in the coal is quickly translated into pyrrhotite and troilite which are higher in paramagnetism by means of microwave irradiation so as to be convenient to remove more effectively in subsequent magnetic separation. The device and the method can be also applied to heating, drying and removal of evaporable harmful substances in industries of textile, dyeing, printing, food, medicine, chemical engineering, mining, papermaking and the like, such as quick removal of harmful substances like formaldehyde contained in textiles and garments and dimethylbenzene contained in artificial boards.

Provided is a method for controlling a laser oscillator. Such a laser oscillator is applicable to a laser processing machine and includes a plurality of oscillator modules each adapted to be driven to oscillate a laser beam. Also, such a laser oscillator is configured to collect laser beams oscillated by driven modules for output. The method includes determining the number of modules to be driven, of the plurality of oscillator modules.

The invention belongs to the chemical technical field, and provides a method for preparing a Zn-intermingled with SnO2 micro-pore nanometer material. The method comprises the steps of (a) blending uniformly 6-16 parts by weight of quadrivalence pink salt, 1-3 parts by weight of Zinc salt, 20-40 parts by weight of hexadecyl trimethyl ammonium bromide, 100-200 parts by weight of neovaricaine, and 500-600 parts by weight of distilled water; (b) placing a solution obtained through the step (a) into a high pressure-resistant teflon container; closing the container hemitically; heating with microwave to 160 to 200 DEG C; and reacting for 10-15 minutes; (c) washing a product obtained through the step (b); centrifuging; drying and obtaining the Zn-intermingled with SnO2 micro-pore nanometer material. The surface of the Zn-intermingled with SnO2 micro-pore nanometer material obtained through the method can reach 120m<2> / g, and the pore size thereof is 1.1nm. The method has the characteristics of short reaction time and easy large-scale industrialized production.

The invention discloses a quantum cascade laser (QCL) phase-locked system using a solid-state semiconductor source harmonic as a reference source. The QCL phase-locked system comprises a first wave beam separator, a second wave beam separator, a band-pass filter, a terahertz frequency mixer, an intermediate-frequency amplification unit and a phase-lock unit which are connected sequentially, wherein a terahertz QCL outputs a signal to the first wave beam separator, and a solid-state semiconductor source higher harmonic outputs a signal to the second wave beam separator; the first wave beam separator and the second wave beam separator couple the output signal of the terahertz QCL and the signal of the solid-state semiconductor source higher harmonic to the terahertz frequency mixer respectively, and the frequency mixer uses the solid-state semiconductor source higher harmonic as a phase-lock reference; an intermediate-frequency signal obtained after the frequency mixing of the terahertz frequency mixer is amplified via the intermediate-frequency amplification unit at first, and then conveyed to the phase-lock unit; and the phase-locked performs phase-lock processing on the intermediate-frequency signal, so as to realize the phase lock of the terahertz QCL.

When forming a module 100 having a configuration in which a column-shaped connection terminal 11, which forms an interlayer connection conductor, and an electronic component 102 are mounted on a wiring substrate 101 and sealed with a resin, the column-shaped connection terminal 11 which has a substantially T-shaped cross section and in which a first end portion has a larger diameter than a second end portion is prepared (the preparation step), an electronic component 102 is mounted on one main surface of the wiring substrate 101 and the connection terminal 11 is mounted on the one main surface in such a manner that the second end portion of the connection terminal 11 having a smaller diameter is connected to the wiring substrate 101 (the mounting step), and the electronic component 102 and the connection terminal 11 are sealed with a resin layer 103 (the sealing step).

The invention discloses a power adjustable, approximate-Gaussian spectrum and erbium doped super-fluorescent fiber source. The tail fiber of a pumping source (1) with 980nm wavelength is welded with the input fiber at the A terminal of a first wavelength division multiplexer (2) with 980nm or 1550nm wavelength; the tail fiber at the B terminal of the first wavelength division multiplexer (2) with 980nm or 1550nm wavelength is welded with one end of the section A erbium doped optical fiber (3); the other end of the section A erbium doped optical fiber (3) is welded with input fiber at the A terminal of a second wavelength division multiplexer (4) with 980nm or 1550nm wavelength; the tail fiber at the D terminal of the second wavelength division multiplexer (4) with 980nm or 1550nm wavelength is welded with the tail fiber of a faraday rotation mirror (5); the tail fiber at the C terminal of the first wavelength division multiplexer (2) with 980nm or 1550nm wavelength is welded with one end of the section B erbium doped optical fiber (6); the other end of the section B erbium doped optical fiber (6) is welded with input fiber of an isolator(7). The invention applies a double pass backward configuration, which makes the output power of the erbium doped super-fluorescent fiber source more than 3mW; and the erbium doped super-fluorescent fiber source is a power adjustable optical fiber source with the average wavelength near 1560nm.

A mobile device camping on a radio access network is provided. The mobile device includes an antenna, a radio frequency module, a detector and a processor. The RF module transmits a data packet to the radio access network via the antenna according to a radio power. The detector detects a distance between the mobile device and a user, and generates a detection signal according to the distance between the mobile device and the user. The processor controls the antenna and the RF module to transmit a first power level of the radio power to the radio access network according to the detection signal, so as to obtain a second power level from the radio access network, wherein the processor adjusts the radio power according to the second power level. In the invention, the power can be adjusted to reduce the special adsorption ratio of the mobile device.

Provided is a method for controlling a laser oscillator. Such a laser oscillator is applicable to a laser processing machine and includes a plurality of oscillator modules each adapted to be driven to oscillate a laser beam. Also, such a laser oscillator is configured to collect laser beams oscillated by driven modules for output. The method includes determining the number of modules to be driven, of the plurality of oscillator modules.

The invention discloses a high-efficiency and low-harmonic-wave power amplifier and a mobile terminal thereof. Cascade connection is achieved by utilizing at least one stage of amplifying circuit, adjustment of radio frequency gain of the power amplifier can be achieved by flexibly configuring bias voltages or bias currents of all units of amplifying units in all stages of amplifying circuits under different power output requirements, and meanwhile optimization from second harmonic waves to tenth harmonic waves and optimization of the amplifier and its module efficiency can be achieved through new load design. The design scheme of the flexible and efficient power amplifier can be applied to a power amplifying application having low-harmonic-wave demand in any wireless connection of Internet of Things, high performance can be achieved in multiple communication systems, and accordingly adjustment of a power mode and harmonic waves of the power amplifier is achieved to meet the demand for multiple communication systems in the Internet of Things.

The invention discloses a vehicle electronic forced stop system and method integrated onto an intelligent radio car. The vehicle electronic forced stop system comprises a vehicle-mounted terminal, wherein the vehicle-mounted terminal is electrically connected with electromagnetic wave transmitting equipment; the electromagnetic wave transmitting equipment is in signal connection with a multi-dimensional electromagnetic coupling module; and the multi-dimensional electromagnetic coupling module is in signal connection with an engine computer, an ignition circuit and a key sensor. The vehicle electronic forced stop system radiates high-power electromagnetic waves to a suspected vehicle in a directed manner; after multi-dimensional electromagnetic coupling, the high-power electromagnetic wavescan interfere with the engine computer, the ignition circuit and the key sensor of a target vehicle; the ignition signal is interfered to cause that the vehicle engine cannot burns normally, as a result, the engine has flameout and the vehicle loses power; the target vehicle is forced to stop in a non-contact manner, remote control is adopted, the operation is safe, radiating wave beams have directivity, modular design is realized, the output power is adjustable, and the remote operation by a law enforcement officer is low in risk to lower the out of control coefficient during the vehicle forced stop executing process.

The invention concerns mains units for voltage conversion for electronic terminal devices. The invention concerns in particular a plug-in socket for coupling to corresponding standard plugs and for connecting an electrical terminal device to a voltage supply. The invention also concerns means for voltage conversion for a plug-in socket. The object of the invention is to improve the use of mains units with voltage conversion means, in comparison with the state of the art. The object is attained by a plug-in socket for coupling to corresponding standard plugs and for connection of an electrical terminal device to a primary voltage, comprising a socket housing, first electrical contact device arranged in the socket housing for coupling to corresponding electrical contact device of the standard plugs, a device integrated in the socket housing for voltage conversion of a primary voltage into at least one secondary voltage for the electrical terminal device, second electrical contact device arranged on the socket housing for electrical contacting of the secondary voltage and wherein the voltage conversion device are integrated in the socket housing so that the external dimensions of the socket housing are substantially predetermined by the dimensions of the corresponding standard plug. The object is further attained by voltage conversion device for a plug-in socket as set forth above comprising a closed one-part structural form. The object is still further attained by an electrical terminal device comprising a plug-in socket as set forth above.

The invention relates to a crane hydraulic system and discloses a power control hydraulic system. The system involves a first constant flow pump, a second constant flow pump, an operating valve and aplurality of loading executing mechanisms, wherein the operating valve is connected with the loading executing mechanisms, and the first constant flow pump and the second constant flow pump are connected with an oil inlet of the operating valve so as to supply oil to all the loading executing mechanisms through the operating valve; and the system further involves a flow control valve, the flow control valve comprises a first oil outlet connected with the oil inlet of the operating valve, a second oil outlet connected with a main oil return oil way and a first oil inlet connected with the firstconstant flow pump, and the opening degree of the valve port of the second oil outlet of the flow control valve can be controlled so that flow input into the loading executing mechanisms can be adjusted. The invention further discloses a crane. According to the system and the crane, the power required by loading can be adjusted so that the requirements of various working conditions on the outputpower can be met.

A burn-in oven having an inverter fan and a heat regulator includes a housing, a frame, a heater, a temperature sensor, an inverter fan, and a control unit. The housing includes an air-in port and an air-out port. The frame is fixedly arranged inside the housing, and is divided into a variety of partitions. In addition, the heater and the temperature sensor are also fixedly arranged inside the housing. The inverter fan is provided for supplying a forced air-flow toward inside of the housing. The control unit is electrically connected with the temperature sensor, the heater, and the inverter fan. The control unit is provided for controlling the temperature inside the housing not to exceed a predetermined value. Thereby, the present invention saves energy and shortens effectively the time required for burn-in temperature rising and lowering, and saves working hours and manpower as well.

The invention discloses an intermediate and far infrared two-waveband laser, comprising a CO2 laser gain module and a DF laser gain module, wherein the CO2 laser gain module comprises a CO2 laser discharge tube, a CO2 laser gain generator and a CO2 laser heat exchanging pipe which are in a sequential connection; the DF laser gain module comprises a DF laser discharge tube, a DF laser gain generator and a DF laser heat exchanging pipe in a sequential connection; the two heat exchanging pipes are connected with a vacuum system; the two laser gain modules are arranged side by side; the adjacent inner sides of the CO2 laser gain generator and the DF laser gain generator are mutually communicated to form a gain medium zone of the two-waveband laser; two sides of the gain medium zone are respectively connected with a two-waveband full-reflecting mirror and a two-waveband output mirror by pipelines; and the two-waveband full-reflecting mirror and the two-waveband output mirror form a laser resonant cavity which can extract two types of gain media. The laser is convenient to operate, stable in work and simple in adjustment of the light path, and can realize composite light emission of the intermediate and far infrared two-waveband lasers effectively.

The invention discloses a monitoring system suitable for an air conditioner. The monitoring system comprises a plurality of sensor modes, a control main engine, an upper computer, a lower computer, a central air conditioner terminal, a solid voltage regulator and a compressor power measuring module, wherein the sensor nodes are aggregated into an aggregation node which comprises a wireless module 24 L01 and a master control chip STM32F103VET6; the aggregation node and the control main engine realize remote transmission through the Ethernet; a temperature sensor, a humidity sensor, an air quality sensor, a wireless module 24 L01 and an infrared sensing module are arranged on each sensor node; and each infrared sensing module comprises a pyroelectric sensor and an infrared sensing signal processor. The monitoring system disclosed by the invention can be used for performing real-time monitoring on environmental variable parameters such as indoor temperature, humidity and air quality; and output power of a central air conditioner is regulated to be matched with practical load, so that fixed-point fixed-direction regulation according to needs is realized.

It is energy economical, low in cost, high in energy storage, adjustable in output power, and directly linking with urban network. It comprises the water pool for cooling and recovering heat from the fly wheel energy storage sub systems, with several energy storage system's permanent DC generator power sum big or equal to the required recovery or reproduction demanded power for the traction of vehicles, and they use overlap mode to directly connect with the urban DC network, air pressure inside the shell equal or lower than 10-4Pa and the limit rotation speed higher than 150000 rpm of the fly wheel, with the bearing using magnetic bearing.

The invention discloses a CNC laser engraving integrated machine tool. The CNC laser engraving integrated machine tool comprises a main frame, a machining head, a protective cover and a device bin; the main frame is a frame defined by a metal structure; a machining table is arranged at the bottom of the main frame; a ball screw is arranged within the scope of an area defined by the main frame andis fixedly connected to the opposite side walls of the main frame; a C-shaped groove is formed in the back side of the machining head, and the machining head is arranged on the ball screw through theC-shaped groove, can move along the ball screw and comprises a spindle motor; the spindle motor clamps a tool; the machining head further comprises a laser module; and the laser module is arranged onthe side wall of a clamping part of the motor in parallel and is used for positioning and engraving.