102results about How to "Increased power output capability" patented technology

An alternator system having an alternating current (ac) voltage source includes a switched-mode rectifier (SMR) coupled to the ac voltage source and having an output port coupled to an output of the alternator system, and a controller coupled to said switched-mode rectifier so as to provide a controlled pulse sequence synchronized with an angular rotor position of the (ac) voltage source to activate and deactivate the switched-mode rectifier. The controller further includes a PWM generator having a first input to receive a total duty ratio signal synchronized with an angular rotor position of the (ac) voltage source. The switched mode rectifiers are controlled to increase power output levels at lower speeds near idle. The controller combines improved idle speed power output levels with load matching improvements from PWM control for more efficient operation when compared to circuits using conventional control or PWM load matching control alone.

The invention relates to a lithium ion battery cathode material LiNixCoyM1-x-yO2 prepared from micron-sized single crystal particles and a preparation method thereof, wherein x is greater than 0 and is not more than 0.8, y is greater than 0 and is not more than 0.5, and M is one or two of Li, Mn, Al and Mg. The invention is characterized in that (1) composite oxide or hydroxide of transition metal nickel, transition metal cobalt and modified metal M is used as a raw material, the composite oxide or hydroxide is porous aggregate comprising nanocrystals, the average size of the aggregate is 2-50 micrometers, and the specific surface area of the aggregate is greater than 15m<2>/g (measured by BET method); (2) the composite metal oxide or hydroxide and lithium salts are milled in a ball mill, the micron-sized composite metal oxide or hydroxide is converted into nanocrystal particles to obtain a nano-sized mixed precursor of the composite metal oxide or hydroxide and the lithium salts, and the mixed precursor is sintered at uniform temperature to obtain the required lithium ion battery cathode material; and (3) the prepared lithium ion battery cathode material LiNixCoyM1-x-yO2 is basically prepared from micron-sized single crystal particles, and the average size of the single crystal particles is 2-20 micrometers. In addition, the product has excellent physical and electrochemical properties, such as ultra-low specific surface area, reasonable particle size distribution, good electrode processing properties, ultra-long cycle life, excellent rate capability, obvious high and low temperature cycling and storing properties and excellent safety; and the product can be widely used as a high-performance lithium ion battery cathode material. The invention provides the high-performance lithium ion battery cathode material and the preparation method thereof.

The invention is suitable for the field of radio frequency communication, and provides a double-stage inversing D-class power amplifying circuit and a radio frequency power amplifier. The circuit comprises an input passive component connected with a block condenser, a positive and negative double-way driving-stage F-class amplifier, a positive and negative double-way amplifying-stage inversing F-class amplifier and an output passive component, wherein the two input ends of the positive and negative double-way driving-stage F-class amplifier are connected with the two output ends of the input passive component through two block coupling condensers, the two input ends of the positive and negative double-way amplifying-stage inversing F-class amplifier are connected with the two output ends of the positive and negative double-way driving-stage F-class amplifier through two condensers, and the two input ends of the output passive component are connected with the two output ends of the positive and negative double-way amplifying-stage inversing F-class amplifier through the two condensers. By utilizing an F-class driving inversing F-class push-pull structure, according to the harmonic shaping technology, the efficiency, the power and the gain of the power amplifier are improved, the independent control from a fundamental wave to a triple frequency harmonic impedance is achieved, the design difficulty is lowered, and the tedious debugging work in the later period is lowered. In addition, due to the positive and negative double-way structural design, the power and the gain are further improved.

The invention provides a six-phase flux switching type permanent magnet motor which comprises stators, rotors and a rotating shaft, wherein each stator adopts a permanent magnet double salient structure, that is, the permanent magnet, the stator core and the armature winding are arranged on each stator, the stator core is assembled by an U-magnetic core and each permanent magnet embedded in the magnetic core, and the permanent magnets are of tangential alternate magnetization; the armature winding is of six-phase armature winding arranged on the stator, the six-phase armature winding adopts centralization coils, and the rotors are made of permeability magnetic material; the magnetizing directions of the permanent magnets are of the tangential of the stator circle, and the magnetizing directions of two adjacent permanent magnets are opposite to each other; the number of the armature coil and the stator groove is even number times of the phase number; and each phase 2n coils winding, and n coils are distributed at the two ends of the diameter of the stator circle respectively. And two three-phrase winding can conduct independent power supplying and generating.

The invention discloses an aperture-controllable porous electrode and a preparation method thereof, and relates to a porous electrode. The aperture-controllable porous electrode consists of carbon materials and is a three-dimensional (3D) network framework thin film; the average aperture is concentrated between 0.1 micron and 5 microns; the thickness of the aperture-controllable porous electrode can be 50 to 0.1mm; and the porosity of the aperture-controllable porous electrode is more than 80 percent. The method comprises the following steps of: blending carbon material powder with an adhesive and a pore-forming agent; adding a dispersing agent, and stirring to be granular to obtain granular wet powder; and repeatedly rolling the obtained granular wet powder into a sheet thin film through a rolling shaft, folding and continuously rolling the sheet thin film until an electrode thin film is molded, and baking to obtain the aperture-controllable porous electrode. The aperture-controllable porous electrode is simple in preparation process, controllable in electrode aperture, low in cost and pollution-free, and can be widely applied to a high-charge-discharge magnification liquid-phase energy storage battery, a dual-electric-layer super capacitor, a fuel battery and other battery types containing the porous electrode as an assembly.

The invention relates to a series dynamic voltage restorer which adopts a super-capacitor and battery hybrid energy storage system, belonging to the technical field of power equipment. The dynamic voltage restorer comprises a charge device which is used for charging the super-capacitor and battery hybrid energy storage system, a hybrid storage energy system consisting of a super-capacitor and a battery and used for storing the power energy in direct current form, an invert unit which is used for outputting compensation voltage and a boosting filter unit which is used for connecting the dynamic voltage restorer to a power system. The dynamic voltage restorer uses one hybrid energy storage module to realize the energy storage requirement of the direct current side of the restorer to replace the traditional energy storage manner, thus satisfying the compensation need of short-time drop of voltage in the power system. At the same time, compared with the dynamic voltage restorer which adopts a traditional energy storage unit, the dynamic voltage restorer has better dynamic response, longer compensation time and higher performance price ratio and is more environment-friendly.

The invention discloses a switch reluctance wind power generator converter. The switch reluctance wind power generator converter consists of a converter main circuit, an output bus capacitor, an isolated DC/DC converter, an excitation and discharge main circuit; the output end of the converter main circuit is connected to the output bus capacitor, and also serves as the input end of the isolated DC/DC converter; the output end of the isolated DC/DC converter is connected to the input end of the excitation and discharge main circuit; the output end of the excitation and discharge main circuit is connected to the input end of the converter main circuit; the output anode end of the converter main circuit is also connected to the discharge input end of the excitation and discharge main circuit; and the output anode end of the excitation and discharge main circuit, the output cathode end of the converter main circuit and the input anode end of the converter main circuit are short-circuited. Under the structure, through three types of control modes under different conditions, wide power generation range, high power generation capacity and multi-angle flexible control are realized, and the switch reluctance wind power generator converter is applicable to various wind power generation fields.

The invention provides a high-voltage single solid-state lithium ion battery. The lithium ion battery comprises three or more plate-shaped electrodes which are stacked in sequence, wherein the three or more plate-shaped electrodes are sequentially a negative electrode, at least one bipolar plate electrode and a positive electrode from top to bottom, the plate-shaped electrodes are separated by solid electrolyte layers, and the plate-shaped electrodes and the solid electrolyte layers are bonded together in a thermal compounding mode and packaged into a single battery. According to the battery,internal series connection of the single battery is realized, and the problem of difficult packaging or complex packaging structure caused by using a liquid electrolyte is avoided; the single batteryis adjustable in capacity and voltage, high voltage of the single battery can be conveniently realized, and the problems of heating or poor multiplying power and the like when the conventional lithiumion batteries are externally connected in series are avoided; the connection of the energy storage assembly is optimized, and the internal resistance of the battery is reduced; and the production process and equipment are basically the same as those of the existing lithium ion battery, so that large-scale industrial production is facilitated. The invention also provides a preparation method of the high-voltage single solid-state lithium ion battery.

An intelligent buck-boost charging/discharging circuit provided by the present invention comprises a battery module, a power inductor, a charging/discharging control port, a free input/output port and a control unit, the free input/output port is equipped with a current detection circuit, and a first voltage detection circuit is connected between the charging/discharging control port and the free input/output port. A second voltage detection circuit is connected between the anode and the cathode of the battery module, and the control unit controls the on-off of the first, second, third and fourth switches according to the information transmitted by the first voltage detection circuit, the second voltage detection circuit and the current detection circuit. The beneficial effects of the present invention are that the circuit can realize the functions, such as the boost charging, the buck charging, the boost discharging, the buck discharging, the bypass, etc.; a portable power supply applying the circuit can charge itself rapidly; various and different mobile terminals can be charged rapidly; the people are convenient to use.

The embodiment of the invention discloses a control method of an energy storage system, which comprises the following steps: acquiring a system power instruction; determining the charge/discharge state corresponding to the system power instruction; if the charge/discharge state corresponds to the charge state, entering the charging distribution logic, wherein the charging distribution logic includes: allocating a corresponding charge power reduced cluster power instruction for a battery cluster having a SOC value higher than an average SOC value, and allocating a corresponding charge power increased cluster power instruction for the battery cluster having a SOC value lower than the average SOC value; if the charge/discharge state corresponds to the discharge state, entering the dischargingdistribution logic, wherein the discharging allocation logic includes: allocating a corresponding discharge power increased cluster power instruction for a battery cluster having a SOC value higher than an average SOC value, and allocating a corresponding discharge power reduced cluster power instruction for the battery cluster having a SOC value lower than the average SOC value. The method solves the technical problem that the existing equalization methods are all aimed at the SOC equalization of the battery cells in the cluster and there is lack of a control method for the inter-cluster equalization of the energy storage system.

An energiser for an electric fence. The energiser includes, at least, one energy storage capacitor (14), a charging circuit (13) to enable the or each storage capacitor (14) to be charged from an energy source (10), semiconductor switching means (16), and control circuit means (15) to facilitate controlled turning -on and -off of the semiconductor switching means (16) to control the duration of the discharge from the energy storage means (14). In one form of the energiser a first semi-conductor switching means is arranged to connect in parallel the energy storage capacitors (14) to be charged and second semi-conductor switching means to connect two or more of the charged energy storage capacitors (14) in series to create an output pulse.

The invention relates to a self-adaptive method for controlling current charge and discharge of an ultra-capacitor and a system thereof, which belongs to the technical field of power supply. The method comprises the step of setting threshold current I0 on the basis of outputting an external characteristic Lb by a power battery, wherein when the current output by the power battery is greater than the I0, a dual-directional power converter controls the ultra-capacitor to be at a discharge state, and the discharge current of the ultra-capacitor increases with the increment of the current output by the power battery; and when the current output by the power battery is less than I0, the dual-directional power converter controls the ultra-capacitor to be at a charge state, and the charge current of the ultra-capacitor increases along with the decrease of the current output by the power battery. The system comprises a power battery set, an ultra-capacitor and a dual-directional power converter connected between the output end of the power battery and the output end of the ultra-capacitor. The adaptive method controls the charge-discharge state of the ultra-capacitor and the current, limits the discharge current of the power battery and improves the service life of the power battery.

The invention relates to a self-reinforced self-charging separate-excitation switch reluctance generator converter and a control method thereof. The converter is composed of a conversion main circuit, an excitation power, a power generation diode, a bus capacitor, and a charging main circuit. A positive terminal of the output of the conversion main circuit is connected in parallel with the bus capacitor and the charging main circuit by the power generation diode; the output of the charging main circuit is connected with the excitation power; and the excitation power outputs power for the conversion main circuit. Each phase of winding has two sets of parallel reinforced excitations to increase follow currents and reinforcing excitation. A separate-excitation storage battery is charged automatically by using the bus voltage through the controllable charging main circuit.

The invention discloses a porous electrode, a preparation method thereof and an application of the porous electrode in the aspect of preparing a lithium ion capacitor and a supercapacitor. The porous electrode is formed by adding a pore-forming agent to electrode slurry, and after the electrode is formed, carrying out extraction on the electrode to remove the pore-forming agent by utilizing a polar solvent. According to the porous electrode in the invention, gaps in the surface are many and uniform, and porosity is relatively high, so that the electrode has a relatively-large electrochemical reaction interface; the mechanical strength is large, and the gaps are not easy to collapse, so that electrode performance is high and stable; when electrolyte enters and leaves out of the inner portion of the electrode, the electrolyte can spread quickly to enable electrochemical active materials to reach the surface of the electrode so as to carry out corresponding physical and chemical reactions; the electrode has relatively-high power output capability, and can meet the demand of high power density output of the lithium ion capacitor and the supercapacitor and the like; and the electrode is suitable for energy-storage equipment with high charge-discharge multiplying power, and especially suitable for the preparation of the supercapacitor and the lithium ion capacitor.

The invention discloses a power amplifier which comprises an input match circuit, an output match circuit and a power amplifying unit. The power amplifying unit comprises N transistors, wherein the N transistors are connected sequentially in series and N is an integer larger than 1. The third end of a first transistor is connected to the input match circuit, the second end of the first transistor is connected to the ground, all second ends from the second end of a second transistor to the second end of a Nth transistor are connected with the first end of a transistor placed in a prior amplifier stage, all third ends from the third end of the second transistor to the third end of the Nth transistor are connected to corresponding power supplies through inductors, meanwhile, all the third ends from the third end of the second transistor to the third end of the Nth transistor are connected to the ground through capacitors and resistors, wherein the capacitors and the resistors are connected in series, and the output match circuit is connected with the first end of the Nth transistor. The power amplifier is small in occupied landscape area, can reduce landscape design difficulties and furthermore can prevent ohmic loss caused by the inductors, and therefore output power can be further improved.

The invention relates to a high-capacity battery and a manufacturing method thereof, and belongs to the technical field of batteries. The battery comprises an aluminum shell, a cylindrical roll core,a positive electrode cover plate, a negative electrode cover plate, a positive electrode confluence sheet, a negative electrode confluence sheet, a silica gel sheet and a battery support, and the cylindrical roll core is composed of a roll core body and a metal cylinder tube and is of a tab-free structure; the cylindrical roll core is arranged in the aluminum shell, and the positive end and the negative end of the cylindrical roll core are welded with the positive and negative confluence sheets to form a roll core group; and the positive electrode confluence sheet is welded with the metal cylinder tube at the positive electrode end of the cylindrical roll core. The cylindrical roll core is accommodated by adopting the metal tube with high thermal conductivity and high electric conductivity, so that the heat dissipation performance of the single roll core is greatly improved; the rate capability of a single roll core is improved through a tab-free end face welding process; through pairwise welding between the outer shell and the metal cylinder tube and between the metal cylinder tube and the positive electrode end face confluence sheet, an overall high-thermal-conductivity and high-electric-conductivity network is realized, the internal resistance of the battery is reduced, the heat dissipation performance and the rate capability of the whole high-capacity battery are improved,and the service life of the battery is prolonged.

The invention discloses a high-efficiency F type stacking power amplifier based on right and left hand transmission lines. The high-efficiency F type stacking power amplifier comprises an input fundamental wave control network, a four-stacking self-bias power amplification network, a parasitic parameter compensation network, a right and left hand transmission line harmonic control network, an output fundamental wave control network, a gate power supply bias network, and a drain power supply bias network. The high-efficiency F type stacking power amplifier disclosed by the invention adopts a four-stacking transistor structure based on a self-bias structure, and combines a high-efficiency F type matching mode of the right and left hand transmission line harmonic control network, so that thecircuit can independently control the fundamental wave, second harmonic impedance and third harmonic impedance of the output impedance while having the transistor parasitic compensation capability, high-efficiency, high-grain and high-power output capability of the amplifier is achieved, and a relatively small circuit size is occupied.

The invention discloses a multi-power-source series-connection type hybrid power unmanned aerial vehicle and a control method thereof. The unmanned aerial vehicle comprises a vehicle body, a left wing, a right wing, a left aileron, a right aileron, a left flap, a right flap, an empennage, a left wing motor, a left wing propeller, a right wing motor, a right wing propeller, a standby propeller module, a horizontal stabilizer, a vertical stabilizer, an elevator, a rudder, an engine, a clutch, an inverter, a power generation/electric all-in-one machine, a storage battery pack, a super-capacitor,an oil tank, a temperature sensor, a pressure sensor, a state-of-charge estimation module and a control module. Enough cruising ability and high maneuverability of the unmanned aerial vehicle can be guaranteed; and meanwhile, the standby propeller module is arranged on the empennage, so when a driving mechanism of the unmanned aerial vehicle breaks down, an engine drives the standby propeller to drive the unmanned aerial vehicle, the situation that the system has a certain redundancy function is guaranteed, and the survival capacity of the unmanned aerial vehicle is greatly improved.