915results about How to "Large adjustment range" patented technology

Disclosed is a clock adjusting circuit comprising a phase shifter that receives a clock signal and variably shifts, based on a control signal, respective timing phases of a rising edge and a falling edge of the clock signal; and a control circuit that supplies the control signal to the phase shifter circuit before each edge is output; wherein the clock signal, in which at least one of a period, a duty ratio, jitter and skew/delay of the input clock signal is changed over an arbitrary number of clock cycles, is output.

The invention involving a magnetorheological fluid damping device for automobile suspension system.The magnetic field generator of this damping device consists of permanent magnet and electromagnetic coil.On the top of the damping device,there are guide apparatus and damping regulator,the function of which is that to ensure the damping channel is uniform annular duct and to meet the high-damp requirement in the restoration process and low-damp requirement in the compression process of damper seperately.The current in the electromagnetic coil designs of bi-directional and this controls the magnetic field intersity of the damping channel,decreases the excitation current of the electromagnetic coil,reduces energy consumption and decreases damper fever.On the non-controlling conditions,this damping device has the equivalent characteristics of the traditional shock absorber and can instead the passive shock absorber,after equiping corresponding current controller,this device can regulate the damping characteristics of suspension system,which improves the automobile driving safety and ride comfort.

The invention discloses a multiple-degree-of-freedom suspension K&C (kinematics & compliance) property test platform, which mainly comprises a support system, a loading system, a measuring system, a movement platform system and a control system, wherein the support system is used for supporting a vehicle to be measured and the loading system, six electric cylinders in the loading system are used for driving the movement platform system to realize the six-degree-of-freedom movement, a left pier and a right pier in the loading system are slidingly connected above the movement platform system, a circular disc motor in the left pier and a circular disc motor in the right pier respectively drive a pier table to rotate, the measuring system is used for measuring the displacements and the applied forces of wheels of the vehicle to be measured, and the control system is used for collecting signals measured by the measuring system, and driving the loading system to load the vehicle to be measured. The multiple-degree-of-freedom suspension K&C property test platform has the advantages that the particular multiple-degree-of-freedom loading type is adopted, the lateral inclining angle and the longitudinal inclining angle of a real road surface can be completely simulated in the test process, the rotation inertia of the whole vehicle or component parts can be measured by little modification, the structure is simple, the measuring range is wide, and the application prospect is better.

The invention belongs to the metallurgy technical field and in particular relates to an intermediate blank cooling system and cooling control technology. The intermediate blank cooling system is characterized in that an aerial fog cooling device body is arranged between a rough mill and a finishing mill. The aerial fog cooling device body is composed of an upper cooling header and a lower coolingheader, and an aerial fog nozzle and a compression air pipe are arranged on the cooling water pipe of the upper cooling header and the lower cooling header; and the on/off control valve and flow control valve of the cooling water pipe and the compression air pipe are connected with a control valve station. The intermediate blank aerial fog cooling technology is controlled by the aerial fog controltechnology sprayed on the cooling header arranged near roller ways at the front and rear of the mills. The invention has fast cooling speed without changing metal performance, water yield regulatingrange is wide and the water yield can be regulated continuously, the cooling speed of the intermediate blank can be precisely controlled, and the invention can be widely applicable to middle and thickplate production line.

The invention provides a touch sensor based on flexible voltage-sensing conductive rubber. The invention is characterized in that a sensing unit has a structure form that: a flexible circuit board is used as a motherboard, the disc-shaped flexible voltage-sensing conductive rubber is arranged on the flexible circuit board and is electrically connected with an electrode distributed on the flexible circuit board, a stress surface at the top part of the flexible voltage-sensing conductive rubber is covered by a force transmitting hemisphere; the flexible circuit board is in a four-electrode structure, wherein, a public electrode A is a center circle electrode which is positioned on the concentric position together with the disc-shaped flexible voltage-sensing conductive rubber, a signal electrode B, a signal electrode C, and a signal electrode D which are at an angle of 120 degrees between every two are fan-shaped electrodes that are evenly distributed on a same torus of the periphery of the public electrode A. The invention relates to the touch sensor which has the advantages of strong surface suitability, high reliability, simple signal collecting circuit, and convenient manufacture, and also can be used for the three dimensional force detection.

The invention belongs to the building material field, relates to vitrification bead, thermal insulation mortar and preparation method thereof. A sepiolite fiber modified vitrification bead thermal insulation mortar has the following components of the mass percentages of: 52.5R common portland cement 35-55% fly ash5-15%, heavy calcium powder 1-5%, vitrification bead 35-55%, redispersable latex powder 0.5-2%, cellulose ether 0.1-0.3%, starch ether 0.025-0.07%, air-entrainer 0.01-0.02%, and sepiolite fiber 0.5-2%; wherein, the grades and proportions of the sepiolite fiber are: 3-5mm 30-40%, 5-10mm 40-50%, 10-15mm 20-30%. The epiolite fiber modified vitrification bead thermal insulation mortar of the present invention achieves the advantages of excellent construction performance, no-cracking, good bonding performance to wall, high strength, good thermal insulation performance and low cost.

A preparation method of a high-strength dissolublealuminum alloy material comprises high-temperature firing, stirring at the mass ratio, deslagging, cooling and thermal treatment. A high-strength aluminum alloypreparation principle and an electrochemical corrosion principle are combined, the product composition stability is successfully controlled, the Al-based alloy material with dissolubility, high strength, good shock resistance, high-temperature resistance, high-pressure resistance, high probability of processing, higher thermodynamic property and excellent dissolving property is prepared, and the overall performance of the material is improved.

The invention relates to a low-flow, high-mixing ratio and stepless regulation gas-liquid mixing gas generator, which comprises a round mixing channel, a spray head, an igniter and a body part. The spray head is arranged between the round mixing channel and the body part, and the opening of the spray head faces the body part; the igniter is arranged in the body part; and the round mixing channel comprises a fuel channel communicated with a fuel joint, a main air channel communicated with a main air joint, and an auxiliary air channel communicated with an auxiliary air joint. The technical problem that defects exist in the prior art is solved. The gas-liquid mixing gas generator can be reliably operated and realizes large-scale stable and high-efficiency combustion and stepless regulation.

The invention discloses a mixed phase-shifting control method used for a dually-active full-bridge direct current converter, and belongs to the technical field of power electronics. The mixed phase-shifting control method comprises the following steps: drive pulses of eight switching tubes in the converter are all set to be square waves; the drive pulse of the first switching tube and the drive pulse of the third switching tube in a first full bridge are set to be complementary with the drive pulse of the second switching tube and the drive pulse of the fourth switching tube in the first full bridge respectively, and the drive pulse of the first switching tube and the drive pulse of the third switching tube in a second full bridge are set to be complementary with the drive pulse of the second switching tube and the drive pulse of the fourth switching tube in the second full bridge respectively; a phase-shifting angle D1 is formed between the drive pulse of the first switching tube and the drive pulse of the fourth switching tube in the first full bridge, another phase-shifting angle D1 is formed between the drive pulse of the second switching tube and the drive pulse of the third switching tube in the first full bridge, and similarly a phase-shifting angle D2 is formed between the drive pulses of the switching tubes in the second full bridge; a phase-shifting angle D3 is formed between the drive pulse of the first switching tube in the first full bridge and the drive pulse of the corresponding switching tube in the second full bridge, and another phase-shifting angle D3 is formed between the drive pulse of the second switching tube in the first full bridge and the drive pulse of the corresponding switching tube in the second full bridge; the magnitude and flow direction of output voltage and the magnitude and flow direction of transmission power of the converter are controlled by adjusting the three phase-shifting angles. By means of the mixed phase-shifting control method, the voltage and current stress of the converter can be reduced, loop currents are reduced, and efficiency is improved.

The invention discloses a multi-material laser direct writing conformal system and a method. The system comprises a vacuum seal case, a multi-joint mechanical arm, a multi-material laser direct writing head and a control system for controlling the constituent parts, wherein the mechanical arm and the laser direct writing head are arranged in the vacuum seal case; the laser direct writing head comprises a direct writing head body, a laser and at least two groups of material cylinders; a material channel and a laser focusing channel communicated with the laser and the material cylinders respectively are arranged on the direct writing head body; and the at least two groups of material cylinders are arranged on the direct writing head body in parallel. A particular process is as follows: the mechanical arm drives a workpiece to move along a set path; a material controller selects the corresponding material cylinders; a discharge head delivers and allows materials to be attached to the surface of the workpiece; and at the same time, laser light emitted from the laser focusing channel carries out solidifying or sintering forming on the attached materials. According to the invention, a control process is simple, the forming precision is high, continuous production is achieved, and production efficiency is improved.

The invention relates to a control method of low-speed stage starting of static frequency conversion starting of a pumped storage power station, comprising the following steps: calculating the initial position of a rotor; estimating each force commutation moment of a low-speed stage inverting bridge according to a preset constant acceleration value; electrifying an appointed two-phase winding at the unlocking moment of a frequency converter according to an interval to which the initial position of the rotor belongs; switching a rectifier bridge to an inversion run mode at the forced commutation moment, sending a trigger pulse to a thyristor bridge arm corresponding to the appointed two-phase winding according to an interval to which a rotor position angle belongs at the moment after a loop of a frequency converter is cut out and each bridge arm of the inverting bridge is reliably shut off, and simultaneously switching the rectifier bridge to a rectifying run mode, and ending single forced commutation; ending the low-speed run stage if the rotor speed is higher than or equal to 5 percent of specific speed of a machine set, and then switching to a natural commutation stage based on machine terminal voltage, or carrying out the forced commutation again; and if starting exceeds time, regulating the preset constant acceleration value, and then restarting until successful starting. The invention can realize rapid and reliable frequency conversion starting at the low-speed stage of the machine set of the pumped storage power station as long as a set value of the constant acceleration of machine set starting is regulated.

The embodiment of the invention discloses an OLED (organic light-emitting diode) device, an AMOLED (active matrix organic light-emitting diode) device and a manufacturing method of the AMOLED device, and belongs to the field of manufacturing lighting devices and display devices. According to the invention, an adjustment range of electrode work functions of the OLED device is enlarged, the light emitting efficiency of the OLED device is increased, the manufacturing process of the AMOLED device is reduced, and the production cost is reduced. The AMOLED device comprises a TFT (thin film transistor) active layer, a pixel electrode layer and the OLED device, wherein the OLED device comprises a cathode layer and a functional layer, and the pixel electrode layer is taken as an anode layer of the OLED device; or the OLED device comprises an anode layer and the functional layer, wherein the pixel electrode layer is taken as the cathode layer of the OLED device; and the TFT active layer and the pixel electrode layer are formed by the same IGZO (indium gallium zinc oxide) film through a composition technology. The embodiment of the invention is applicable to manufacturing the lighting devices and the display devices.

An automatic tensioning device for belt conveyor is suitable for long-range covneyor or a rubber belt conveyer, of which belt has a large extension rate. It achieves a large regulative range, an accurate control of tension force, and stable adjustment. The system consists of a tension monitor, a hydraulic device and a hydraulic hoist. The tension monitor comprises a detecting cylinder, a pressure sensor, a shutoff valve and a pressure meter. The hydraulic device comprises a pump, a reversing solenoid valve, a overflow valve, a manual valve, a hydraulic one-way valve, a proportional reversing valve, a one-way throttle valve, a one-way valve, a throttle valve, a tank, and oil-way. The outlet of the pump is respectively connected with the tension monitor, the cylinder and the driving circuit of the hydraulic hoist via the one-way valve.

An optical system of a helmet displayer comprises a micro displayer, a bonding lens and an optical combiner. The micro displayer and the bonding lens are bonded integrally, the optical combiner comprises two tightly-adhered right-angle prisms forming a 45-degree angle and a concave-surface reflecting mirror, a narrow-band high-reflective optical surface is located at the bonding position of the two right-angle prisms and forms a 45-degree angle respectively with the horizontal optical axis and the vertical optical axis, the concave-surface reflecting mirror and the right-angle prisms are bonded integrally, and the concave surface is the high-reflective optical surface. Light beams are emitted from the micro displayer, are converged through the bonding lens, enter the optical combiner and pass through the narrow-band high-reflective optical surface, then transmitted light beams are converged through the high-reflective optical surface again, and reflected light beams become parallel light beams after the light beams pass through the narrow-band high-reflective optical surface again. An exit pupil is located at the position of a pupil of one human eye, extraneous light enters the optical combiner and passes through the narrow-band high-reflective optical surface, and then the transmitted light beams enter the pupil of one human eye. The optical system of the helmet displayer has the advantages of being compact in system, convenient to correct, good in aberration correction and high in reliability.

The invention discloses a magnetic element based on a spin hall effect, a microwave oscillator and a manufacturing method thereof. The magnetic element comprises a non-magnetic metal film layer (ML) and a magnetic film layer (FL), wherein the non-magnetic metal film layer (ML) can induce electrons to generate spin currents, and the magnetic film layer (FL) is formed on the non-magnetic metal film layer (ML) and can balance magnetization. The microwave oscillator comprises the magnetic element, the magnetic element is formed on a substrate layer (SL), and metal electrodes (EL) are formed on the magnetic element. The microwave oscillator can be formed by using a thin film deposit technology, a photoetching and/or etching technology and the like. The structure of the magnetic element is beneficial to reducing the noise of the microwave oscillator, device microwave frequency is wide in adjustable range under the effect of impressed currents, and output microwave signals are excellent in performance. The microwave oscillator has the advantages of being small in size, simple in structure and the like, and is simple in manufacturing technology, compatible with traditional nano-meter processing technologies, easy to manufacture in a mass mode and capable of serving as a microwave source to be widely applied in the fields of electronics, communication and the like.

The invention provides an apparatus for testing the fatigue life of a high-speed angular contact ball bearing. The apparatus tests the fatigue life of the angular contact ball bearing under the working condition of various rotary speeds and loads by adoption of a frequency converter to realize infinite variable speed of a high-frequency motor, adoption of a transmission shaft to drive the angular contact ball bearing to rotate at a high speed under certain pretightening force, and adoption of a weight to adjust and load the axial pretightening force. The apparatus overcomes the defects of complex structure, expensive price, trivial operation, large noise and so on of the prior apparatus for testing the fatigue life of the angular contact ball bearing, realizes zero transmission and lever loading, and has the advantages of superior high-speed performance, reliable test results, simple structure and low cost.

A flexible surgical instrument, an operating arm system and a minimally invasive surgical robotic slave manipulator system are provided. The flexible surgical instrument includes an instrument drive mechanism, a flexible instrument arm, an active actuator of the flexible instrument arm and an operating forceps. The flexible instrument arm has the first end connected to the instrument drive mechanism and the second end connected to the first end of the active actuator of the flexible instrument arm. The operating forceps is connected to the second end of the active actuator of the flexible instrument arm. The instrument drive mechanism drives the active actuator of the flexible instrument arm to move. The flexible instrument arm moves along with the active actuator of the flexible instrument arm. The instrument drive mechanism also drives the operating forceps to move. The systems are small in size and flexible in layout, a supporting arm and an instrument guide arm can be regulated passively with a large regulation range, the space occupied in an operating room is small, and the systems can be laid out freely according to the environment of the operating room.

The invention discloses a branch controllable titanium dioxide nanotube array thin film and a preparation method thereof. The thin film consists of an array of a titanium dioxide nanotube formed by connecting a main tube and a branch tube in series; the thickness of the thin film is 1-100mum, and the porosity factor is 40-60 percent. The preparation method comprises the following steps: preparinga main tube electrolyte according to the proportion that the mole ratio of ammonium fluoride to glycol to water is 0.05-0.15:17.7:0.015-0.025, and preparing a branch tube electrolyte according to theproportion that the mole ratio of hydrofluoric acid to glycol is 0.15-0.25:17.7; then firstly, putting one surface of a titanium sheet in the main tube electrolyte to serve as the anode; carrying outanode oxidization under the conditions that the DC voltage is 55-65V and the temperature is 0-35 DEG C for 0.5-6h; then using the glycol to clean the anode; subsequently, putting the surface which isanodized in the branch tube electrolyte to serve as the anode, and carrying out anode oxidization under the conditions that the DC voltage is 30-120V and the temperature is 0-35 DEG C for more than 30min, thereby preparing the thin film. The thin film can be widely used for fields of dye-sensitized solar cells, gas sensors, photolytic water hydrogen production and photonic crystal.

The invention discloses an inorganic modified polyurethane grouting material. The inorganic modified polyurethane grouting material comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 85-98 parts of sodium silicate solution, 0.5-3 parts of catalyst, 1-5 parts of chain extender and 0-8 parts of water; and the component B comprises the following components in parts by weight: 10-80 parts of modified polymeric MDI-PU2101, 10-75 parts of modified polymeric MDI-PU2102, 5-20 parts of viscosity reducing agent and 5-15 parts of plasticizer. A preparation method of the material disclosed by the invention is simple, and the material is injected into a coal-rock mass through a dual-liquid grouting pump and can achieve the function of reinforcing the coal-rock mass after fast curing; compared with the conventional polyurethane grouting material, the material has the advantages of lower highest reaction temperature, excellent flame resistance, lower cost, capability of keeping the mechanical properties at a higher level, capability of still keeping the higher strength in a water environment and the like; and the material does not contain toxic, volatile and corrosive substances and can meet underground safety and environmental protection requirements of the material.

The invention discloses a variable stiffness shaft coupling and a variable stiffness driving mechanism, relates to the field of compliance control of robots and aims to simplify the structure of a VSA (variable stiffness actuator) and increase the adjustable range of transmission stiffness. The variable stiffness shaft coupling comprises a first half coupling and a second half coupling, wherein torque is transmitted between the first half coupling and the second half coupling through elastic reeds, the first half coupling and the second half coupling are supported through an elastic support body, one end of each elastic reed is fixedly connected with the first half coupling, the other end of the elastic reed is glidingly connected with the second half coupling, and the first half coupling can drive the elastic reeds to axially slide relative to the second half coupling. The variable stiffness shaft coupling and the variable stiffness driving mechanism can be used for joint design of a service robot.

The invention belongs to the field of electrical technologies and relates to an isolated type DC/DC boost converter provided with a pull-up active clamping branch and a control method thereof. On the basis of the single-end flyback-type circuit topology, the primary side of a transformer is connected in parallel with a resonant capacitor and a pull-up active clamping branch. The secondary side of the transformer is in cascade connection with a high-frequency voltage doubling circuit. The resonance oscillation occurs between the resonant capacitor and the primary side of the transformer, wherein the resonant capacitor and the primary side of the transformer are connected in parallel. In this way, the bidirectional excitation of an original circuit is enabled and the utilization rate of a magnetic core is improved. Meanwhile, the output-to-input voltage gain of the isolated type DC/DC boost converter is improved. The auxiliary switch tube and the main switch tube of the active clamping branch are the same in switching period, while the auxiliary switch tube is only turned on for a short period of time during each switching period. Therefore, the conduction loss is reduced. The soft switching of the main switch tube and the soft switching of the auxiliary switch tube are both enabled, so that the direct connection problem is avoided. Through arranging the high-frequency voltage doubling circuit in cascade connection with the secondary side of the transformer, an asymmetrical voltage outputted by the secondary-side winding of the transformer is effectively utilized. Therefore, the overall efficiency of the converter is further improved.

The invention relates to an ultrasonic oval vibrating mechanism for assisting a diamond cutter in ultra-precision cutting. The ultrasonic oval vibrating mechanism is characterized by comprising a cutter handle, a vibrating unit and a cutter, wherein one end of the cutter handle has a step-shaped structure; the vertical surfaces and the horizontal surfaces of an upper layer step and a lower layer step are provided with grooves; the vibrating unit comprises a vibrating body consisting of a transverse vibrating rod and a longitudinal vibrating rod which are vertical to each other; the top surface of the joint of the transverse vibrating rod and the longitudinal vibrating rod is provided with a groove; the end part of the transverse vibrating rod is provided with a transverse end face; the other side of the transverse end face is provided with a transverse excitation source and a transverse cover plate in sequence; the end part of the longitudinal vibrating rod is provided with a longitudinal end face; the other side of the longitudinal end face is provided with a longitudinal excitation source and a longitudinal cover plate in sequence; the transverse end face is formed on the vertical surface of the upper layer step of the cutter handle; the transverse cover plate and the transverse excitation source are positioned in the groove of the upper layer step; the longitudinal end faceis formed on the horizontal surface of the lower layer step of the cutter handle; the longitudinal cover plate and the longitudinal excitation source are positioned in the groove of the lower layer step; and the cutter is arranged in the groove at the joint of the transverse vibrating rod and the longitudinal vibrating rod.

The invention discloses a wind tunnel angle-of-attack adjusting device, which comprises an X-shaft mobile mechanism, a Y-shaft mobile mechanism, a yaw angle adjusting mechanism, and a pitch angle adjusting mechanism. By arranging the X-shaft mobile mechanism, the Y-shaft mobile mechanism, the yaw angle adjusting mechanism, and the pitch angle adjusting mechanism, the adjusting in four degrees of freedom is realized; and the pitch angle adjusting scope is greatly increased by loading a motor on a machete plate to revolute with a model pole in a limited test section space. The pitch angle adjusting scope is -10DEG-40 DEG, and is increased by nearly 10 DEG compared with that of a traditional way, therefore, the adjusting attitude of the angle-of-attack mechanism is added; the adjusting scope of the integral angle-of-attack mechanism is greatly increased; and the problems of small angle-of-attack scope of the wind tunnel angle-of-attack mechanism in a limited space and limited attitude adjusting scope of the angle-of-attack mechanism are solved.

The invention provides an accurate controllable non-contact test piece rotary magnetic field fatigue excitation and vibration test device. The device comprises a vibration damping insulation clamp, a vibration damper, a dynamic balance device, a vibration exciter, an electromagnetic piezoelectric coupling vibration sensor, a test station, a transmission device and an accurate control device. The excitation and vibration test device is suitable for rotary test pieces and especially suitable for vibration characteristic researches on a wind power blade, an engine, a turbine blade, a helicopter rotor and a tail rotor blade, the excitation and vibration test device can vividly simulate vibration fatigue states of rotary test pieces respectively under conditions of 360-DEG all directions, same rotating speed and different excitation forces, same excitation force and different rotating speeds, and different rotating speeds and different excitation forces, the excitation and vibration test device can monitor related vibration characteristic parameters such as the excitation force, the vibration displacement, the vibration speed and the vibration acceleration continuously, and the excitation and vibration test device is suitable for vibration fatigue characteristic analysis on stationary test pieces.

The invention relates to a synthesized multilevel structure ZSM-5 zeolite molecular sieve with intracrystalline meso pores and intercrystalline meso pores, as well as a synthetic method and an application thereof. Except micropores of the zeolite structure, the multilevel structure ZSM-5 zeolite molecular sieve comprises the intracrystalline mesoporous and intercrystalline mesoporous structure, wherein primary nanometer crystal grain size is 40-500nm, and secondary accumulated particle size is 500nm-5[mu]m. The structure greatly improves diffusion performance and the catalyst activity of the molecular sieve, reduces possibility of generation of side reaction and carbon deposit, improves carbon accommodating capability of the molecular sieve catalyst, and prolongs life of the catalyst.

The invention provides an X-and-Ku-waveband power-adjustable microwave source. The device work mode can be changed through regulating the length of an inner conductor, and the X-and-Ku-waveband crossing conversion of the work frequency can be realized.

The invention relates to a Halbach array parallel rotor composite excitation brushless synchronous motor, which comprises a rotor and a stator for accommodating the rotor, wherein the stator comprises a magnetic groove sleeve, an annular exciting winding and the like; the magnetic groove sleeve is fixed on a motor end cover through bolts and is not contacted with the rotor; and the annular exciting winding is fixed at the groove of the magnetic groove sleeve. The rotor consists of a rotating shaft and a Halbach rotor and an electric excitation rotor which are arranged on the rotating shaft in parallel, and the Halbach rotor comprises a non-magnetic rotor supported by the rotating shaft and a Halbach array permanent magnet arranged on the surface of the non-magnetic rotor; the electric excitation rotor comprises a claw pole structure connected with the rotating shaft; and the Halbach rotor is separated from the electric excitation rotor by a separating magnetic ring formed by air gaps. The brushless synchronous motor can reduce the eddy current loss of the rotor, enlarge the adjustable range of a magnetic field and improve the power density of the motor, and has the advantages of high reliability and good energy-saving effect.

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 liquid crystal lens array and a stereoscopic display apparatus, and relates to the technical field of stereoscopic display. The liquid crystal lens array includes a plurality of liquid crystal microlens units, wherein each liquid crystal microlens unit includes a first glass substrate and a second glass substrate; the first glass substrate is plated with a first electrode; the second glass substrate is plated with a second electrode; liquid crystal is filled between the first glass substrate and the second glass substrate; and the first electrode includes a circular electrode at the center position, and at least two annular electrodes which are arranged in the shape of a concentric ring and take the circular electrode as the center. As the 3D display effect formed by the liquid crystal lens array has no directionality, a user can watch the required 3D effect from a wider angle, and the watching angle is more continuous, so that the 3D display effect of a stereoscopic display apparatus using the liquid crystal lens array becomes better and has no shear zones and the problem that the watcher becomes giddy because of being in the shear zone is effectively avoided.

The invention discloses a micro-flow controller based on the peltier effect. The controller comprises a flow restrictor, a gas inlet, a gas outlet, at least one peltier semiconductor device and at least one heat sink. Gas enters the flow restrictor from the gas inlet, after a flow restriction effect is achieved, micro-flow of propellant flows out from the gas outlet, and the flow restrictor and the heat sink are respectively arranged on two faces of a peltier semi-conductor device. By charging the peltier semi-conductor device with electricity and controlling the peltier semi-conductor device, active heating, active cooling and insulation operation can be carried out on the flow restrictor, so that the flow restrictor can fast regulate and stabilize flow of the gas in a large range. Compared with a common micro-flow controller subjected to heating wire active heating and power-off passive cooling, the micro-flow controller carries out active heating and active cooling on the flow restrictor, expands the regulating range of the flow restrictor, and improves regulating speed of the flow restrictor. Efficiency of the peltier semi-conductor device is higher than that of the heating wire during heating.