58results about How to "Good voltage stabilization" patented technology

A voltage regulating circuit for providing a regulated output voltage. The voltage regulating circuit includes a voltage regulator, a converting circuit, a capacitive device, a first current mirror module, and a second current mirror module. The voltage regulator has a first output producing the regulated output voltage and a second output producing a pass voltage. The converting circuit converts the pass voltage into a first current and a second current passing through a first converting node and a second converting node respectively, where the first current charges / discharges the capacitive device. The first current mirror module has a first current mirror path coupled to the first converting node and a second current mirror path coupled to the second converting node.; The second current mirror module has a first current mirror path coupled to the second converting node and a second current mirror path coupled to the first output.

A through hole capacitor at least including a substrate, an anode layer, a dielectric layer, a first cathode layer, and a second cathode layer is provided. The substrate has a plurality of through holes. The anode layer is disposed on the inner surface of at least one through hole, and the surface of the anode layer is a porous structure. The dielectric layer is disposed on the porous structure of the anode layer. The first cathode layer covers a surface of the dielectric layer. The second cathode layer covers a surface of the first cathode layer, and the conductivity of the second cathode layer is greater than that of the first cathode layer. The through hole capacitor can be used for impedance control, as the cathode layers of the through hole are used for signal transmission.

The disclosed rectifying voltage stabilizer includes reference circuit, sampling circuit, trigger circuit, and rectifying circuit. Characters are that the rectifying circuit includes controllable silicon SCR1-3, and diode D1-9. Anodes of controllable silicon SCR1-3 connected together are as cathode end of three-phase half controlled bridge type rectifying voltage stabilizer of magneto (TPRVSM). Cathodes of controllable silicon SCR1-3 are connected to initial ends of armature windings JF1-3 of three-phase magneto alternator, connected to cathodes of diodes D1-3, and anodes of diodes D7-9. Grid is connected to cathodes of diodes D4-6. Cathodes of diodes D7-9 connected together are as anode end of TPRVSM. Taking samples from voltage output end of three-phase magneto alternator, the invention through phase shifting, clipping, rectifying operations converts the samples to voltage stabilized DC to drive electric establishment or charge accumulator directly.

The invention relates to a control method for a power electronic electric energy conversion device, in particular to a self-adaption nonlinear control method for a megawatt medium-voltage medium-frequency three-level direct-current converter. The control scheme of the method is mainly used for completing a voltage stabilization output function and a short circuit current limiting function to achieve the capacity to adapt to backward stage load change disturbance and the capacity for short circuit fault protection. A controller divides system states into a CCM steady state, a DCM steady state and a dynamic state, and when the three states are switched over, parameter self-adaption adjustment is carried out, and therefore excellent voltage stabilization output dynamic performance and static performance are obtained. The controller can overcome the defect that a traditional control method cannot obtain both voltage stabilization output dynamic performance and static performance and different working modes, and the advantages that ripple waves are small in the steady state and voltage fluctuation is small and recovery time is short in disturbance are achieved to the maximum extent.

The invention provides a voltage stabilizer comprising output accelerated replies. A comparer and a voltage-dropping transistor are added between the negative and the positive voltage feedback input ends of an operational amplifier of a low-voltage stabilizer. The comparer is used for detecting voltage the changes of a reference potential point positioned between a first feedback resistor and a second feedback resistor. If the voltage of the reference potential point is higher than a preset voltage, the voltage-dropping transistor can be immediately turned on so that the output voltage can be swiftly decreased to produce excellent voltage stabilization effect.

The invention relates to a low-pulsation series capsule type buffer. The low-pulsation series capsule type buffer can be connected to an outlet pipeline of a hydrostatic test pump when a pressure test is conducted on a loop system. The buffer comprises a shell, a valve body, a capsule and a fungus type valve, wherein one end of the shell is sealed, the valve body is arranged at the other end of the shell, the valve body is communicated with the outline pipeline of the hydrostatic test pump, the capsule is arranged in the shell, a valve rod of the fungus type valve is arranged in the valve body, a valve cap is located in the shell, a partition board is connected to the lower end of the valve rod of the fungus type valve, the interior of the valve body is separated by the partition board in the water flow direction of the outlet pipeline, and a damping hole is formed in the partition board; fluid comes up against the partition board after entering the valve body, a small part of the fluid directly flows out from the damping hole, and the other most part of the fluid rushes to the capsule along a gap between one side of the fungus type valve and the valve body under the blockage of the partition board, then flows back into the valve body along a gap between the other side of the fungus type valve and the valve body after a part of energy is absorbed by the capsule, and finally flows out. Compared with the prior art, the low-pulsation series capsule type buffer has the advantages that the pressure stabilizing effect and the damping effect are good, and the structure is simple.

The invention provides a three-phase one-half period rectification voltage stabilization type electronic controller, wherein the alternating current exported by the three-phase permanent-magnet alternator is converted to direct current with stabilized electric voltage through phase shift, slicing and rectification, the circuit design includes a three-phase one-half period rectification return circuit, a voltage signal sampling return circuit and a phase shifting triggering circuit. The invention is characterized in that, the sampling return circuit samples directly from the exporting end of the three-phase permanent magnet generator voltage.

The invention provides an AC chopper-type voltage stabilizer, a filtering method and a filtering system thereof. The voltage stabilizer comprises a two-way switch buck converter, a filter circuit, a transformer and a control unit, wherein the control unit treats the actual input voltage Vm of the voltage stabilizer according to the following filtering method, generates and sends control signals to the two-way switch buck converter, and controls the output waveform of the voltage stabilizer by controlling the turn-on and turn-off of a power switching element. The filtering method at least comprises: (1) performing band-stop filtering on the actual input voltage Vm of the voltage stabilizer and generating a signal Vs1; (2) implementing linear correction and generating a signal Vs2; (3) performing division algorithm and generating a signal Vc; (4) performing negative feedback operation and generating a signal Vs3; and (5) forming a PWM control signal. Through hardware and software filtering, the invention has the advantages of improving filter topology, adding a filtering control method and ensuring good voltage waveform on the primary side of the transformer, good voltage compensation effect of the transformer and superior performance of the voltage stabilizer.

The invention discloses a voltage stabilizer for a multistage orifice plate buffer spiral guide rail and a method thereof. The voltage stabilizer comprises movable orifice plates, fixed orifice plates, springs, spiral guide rails, clamping springs and sleeves, wherein the sleeves in the voltage stabilizer are connected with the fixed orifice plates in a welding mode, and the surfaces of the sleeves are provided with the spiral guide rails and the clamping springs; the movable orifice plates are installed in the sleeves through the spiral guide rails; and the springs are installed between the movable orifice plates and the fixed orifice plates. According to the length of a pipeline, the number of the movable orifice plates are increased or decreased, and the movable orifice plates are connected with each other by the springs; in the voltage stabilizer, the flow field pressure can be stabilized rapidly by controlling the number of orifices, the diameter of the orifices and the presence or absence of the centre orifices; and the voltage stabilizer for the multistage orifice plate buffer spiral guide rail and the method thereof have simple structure, are easy to manufacture, and can bewidely applied and popularized.

The invention relates to circuit design for converting AC current output by magneto alternator to DC current with stable voltage through phase shift, clipping and rectification, belonging to technical area of automobile motor and electrical appliances. The circuit design includes single-phase dual half wave controllable rectification loop, voltage signal sample loop and triggering loop of phase shift. Characters are that sample loop composed of R1, R2, R3, DW1, R4, T1, R5, R6, D1, D2 components etc. fetches sampling from voltage output end of magneto alternator directly. The invented device can be utilized as rectifier and stabilizer for charging voltage of magneto alternator brought by micro-mini engine to drive operation of appliances needed DC current or charge accumulators. The stabilizer possesses advantages of simple circuit, reliable operation, good performances and energy saving.

The invention belongs to the field of testing devices, and relates to a water outburst and mud outburst testing device for a high pressure-bearing tunnel. The a water outburst and mud outburst testing device comprises a model test bench and a pressure stabilizing device, wherein the model test bench is divided into three parts, namely an internal square cabin, an external pressure-bearing outer wall and a tunnel opening; the internal square cabin is arranged in the pressure-bearing outer wall; the tunnel opening is welded in the internal square cabin and the pressure-bearing outer wall; and the pressure stabilizing device is used for providing stable water pressure for the test bench and is composed of a high-pressure nitrogen tank and a gas-liquid compound constant-pressure water tank. The water outburst and mud outburst testing device is capable of simulating water outburst and mud outburst processes under high pressure, and achieving a good and lasting pressure stabilizing effect.

The invention provides an electronic voltage regulation controller of a mixed excitation generator and belongs to the technical field of automobile motor appliances. The circuit design of the electronic voltage regulation controller of the mixed excitation generator consists of a reference circuit, a comparison circuit, a triggering circuit and an H bridge control circuit; the size of a magnetic field synthesized by an electrical excitation magnetic field and a permanent magnetic field in a gas gap of the generator is changed by changing the size and direction of electrified current of an electrical excitation winding, so that voltage output by the mixed excitation generator is kept stable; and the electronic voltage regulation controller has the advantages of simple circuit design, reliable operation, excellent voltage regulation performance and the like.

This invention provides a four-phase half-control bridge commutation regulator used in cars including a primary circuit, a sample circuit, a trigger circuit and a commutation circuit characterizing that the comutation circuit includes thyristors SCR1-4 and diodes D1-12, in which, the anodes of the thyristors SCR1-4 are connected together as the negative end of the regulator, the cathodes of which are correspondingly connected with the head ends of JF1-4 of permanent AC generator coil windings and the negatives of the diodes D1-4 and the positives of the D9-12, the gratings are connected with the negatives of diodes D5-8 and the negatives of diodes D9-12 are connected together as the positive end of the regulator, which directly samples from the voltage output of the generator to convert it to DC of stabilized voltage by phase shift, clip and commutation to drive devices needing DC working directly.

The present invention provides five phase half-wave rectification voltage stabilizer for car. It contains reference circuit, sampling circuit, trigger circuit and rectifier circuit, wherein sampling circuit respectively connected with reference circuit trigger circuit, sampling circuit connected to rectifier circuit through trigger circuit. It features said rectifier circuit including controllable silicon SCR 1-5 and diode D1-10, wherein controllable silicon SCR 1-5 anode connected together and used as negative terminal of five phase half-wave rectification voltage stabilizer, its cathode connected magneto alternator coil winding JF 1-5terminal through diode D 1-5 connecting trigger circuit, its gate through diode D 6-10 connecting trigger circuit, coil winding JF 1-5 phase differential being 72, five head terminal connect to one point used as anode end of five phase half-wave rectification voltage stabilizer. The present invention samples directly from voltage output end of five phase permanent magnet alternator, through phase shift, clipping, rectifying, converting into voltage stabilization dc current.

This invention provides a car-used six-phase semi-controlled bridge rectification regulator including a primary circuit, a sample circuit, a trigger circuit and a rectification circuit characterizing that said rectification circuit includes thyristors SCR1-6 and diodes D1-18, in which, the anodes of the thyristors are connected together as the negative of the regulator, the cathodes of which are connected to the head of magnet AC generator coil winding JF1-6, the negatives of diodes D1-6 and positives of diodes D13-18, the gratings of which are connected to the negative of diodes D7-12 and the negatives of diodes D13-18 are connected as the positive of the regulator, which samples directly from the voltage output end of a six-phase magnet generator to convert it to the DC current by phase-shift, clipping and rectification.

The invention relates to a street lamp controller which is characterized by comprising a wireless communication module (1), a central processing module (2), a power source module (5), a control module (3) and a signal acquisition module (4). The wireless communication module (1), the central processing module (2), the control module (3) and the signal acquisition module (4) are electrically connected with the power source module (5); the central processing module (2) is respectively and electrically connected with the wireless communication module (1), the control module (3) and the signal acquisition module (4); the signal acquisition module (4) comprises a current signal processing submodule (6) and a photo-induction submodule (7); and a communication chip adopted by the wireless communication module (1) is a radio frequency chip. The street lamp controller can well adapt to energy-saving requirements of different road sections and is controlled in networking mode and low in cost.

The invention discloses austenitic stainless steel pickling passivation paste and a pickling passivation process, and relates to the technical field of stainless steel surface treatment, in particularto the austenitic stainless steel pickling passivation paste and the pickling passivation process. The austenitic stainless steel pickling passivation paste comprise the following raw material components of, in parts by percentage, 5-30 parts of corrosive agent, 10-40 parts of passivator, 1-5 parts of penetrating agent, 1-3 parts of corrosion inhibitor, 20-40 parts of filler and the balance water. The corrosive agent, the passivator, the penetrating agent, the corrosion inhibitor and the filler are mixed together with water according to a specified proportion, the mixture is uniformly stirredand then integrally prepared into pasty paste, and the prepared mixture is the passivation paste. According to the austenitic stainless steel pickling passivation paste and the pickling passivation process, the problem that the integrity of a passivation film is greatly reduced due to the fact that oxide films on the surfaces of stainless steel equipment and parts are damaged in the manufacturingprocesses of forming, assembling, welding and the like of the stainless steel equipment and the parts can be effectively solved, and the situation that due to defects or incompleteness of the passivation film, the stainless steel equipment or the parts can still be corroded in a corrosion environment is avoided.

The invention discloses a voltage stabilization method applied to output of a piezoelectric transformer. At least one voltage stabilizing diode which works in a reverse breakdown voltage stabilization area is connected at an output end of the piezoelectric transformer or to a rectification circuit of the output of the piezoelectric transformer, so that a voltage stabilization loop connected in parallel with an output load is formed to realize voltage stabilization output. The circuit structure is simple, and the output load regulating capacity of the piezoelectric transformer can be improved; therefore, the requirement on product miniaturization can be met.

This invention provides a parallel AC electronic voltage regulator, in which, the circuit of which includes a stabilizing circuit, a voltage signal sample circuit and a load switch circuit and the regulator stabilizes the AC current output by a single-phase magnet AC generator driven by a generator at 12.5V-14.5V via phase shift and chopping.

The invention relates to a silicon nitride coating of a crucible for a polycrystalline silicon ingot and a preparation method thereof, and belongs to the technical field of silicon nitride coating preparation. The silicon nitride coating is prepared from the following components in percentage by mass: 35 to 50 percent of silicon nitride powder, 20 to 30 percent of microcrystalline cellulose, 5 to10 percent of silica sol, 0.5 to 1 percent of aceramic bonding agent and 20 to 40 percent of water. The preparation method comprises the following steps: (1) wet material preparation: mixing the silicon nitride powder, water, microcrystalline cellulose, silica sol and theceramic bonding agent according to a certain proportion, and stirring the mixture with a stirrer to obtain a material A; (2) granulation: extruding the material A with an extruder to form a cylindrical stripped extrudate, then rounding the extrudate with a rounder to form spherical particles serving as a material B, and storing the material B in a particle storage tank; (3) high-pressure cold spraying: flattening silicon nitride particles on the surface of the crucible by using a high-pressure cold spraying technology without heating the crucible in order that the silicon nitride particles are subjected to plastic deformation and adhere firmly. The silicon nitride coating has the advantages of low porosity, high density and high product yield, and the production cost is lowered.

The invention provides a drug composition for preventing or treating hypertension. The drug composition contains eucommia and mistletoe. The drug composition has a remarkable pressure reducing and stabilizing effect on spontaneously hypertensive rats, and meanwhile has the function of improving hypertensive complications, such as lipid metabolic disease, insomnia, irritability and irascibility.

The invention provides a drug composition for preventing or treating hypertension. The drug composition contains eucommia and mistletoe. The drug composition has a remarkable pressure reducing and stabilizing effect on spontaneously hypertensive rats, and meanwhile has the function of improving hypertensive complications, such as lipid metabolic disease, insomnia, irritability and irascibility.

The invention discloses a through-hole capacitor and a manufacturing method thereof. The through-hole capacitor at least comprises a substrate, a positive layer, a dielectric layer, a first negative layer and a second negative layer. The substrate is provided with a plurality of through holes, the positive layer covers the inner surface of at least one through hole, and the surface of the positive layer in the through hole is of a porous structure. The dielectric layer is positioned on the porous structure of the positive layer. The first negative layer covers the surface of the dielectric layer, the second negative layer covers the surface of the first negative layer, and the conductivity of the second negative layer is higher than that of the first negative layer. When the negative layer in the through hole serves for signal transmission, the through-hole capacitor of the structure can be used as an impedance matching structure.

The invention discloses a common rail device and a common rail fuel system, and relates to the technical field of diesel engines. The common rail device includes a common rail tube; a common rail cavity is formed in the common rail tube; a pressure accumulation assembly is further included, the pressure accumulation assembly is arranged in the common rail cavity and can move in the length direction of the common rail cavity. The pressure accumulation assembly divides the common rail cavity into a first closed cavity and a second closed cavity, the first closed cavity is configured to contain apressure accumulation gas medium, the second closed cavity is configured to contain a fuel medium, and the pressure accumulation assembly is configured to balance the pressure in the common rail cavity through movement in the common rail tube. The common rail device is good in pressure stabilization, smaller in size and higher in adaptability. The common rail fuel system comprises an oil supply device and an oil injection device and further comprises the common rail device; the oil supply device and the oil injection device are both connected with the common rail device, and the common rail fuel system is higher in integration degree and adaptability.

A three-in multi-out two-stage electromagnetic boosted braking pump is composed of an upper pump body with upper piston, upper valve and low piston modules, a lower pump body with lower valve module, an upper piston sleeve, and a two-position three-way electromagnetic valve.

The invention discloses a pressure-stabilizing fuel gas distributor which comprises a tubular body. A tubular buffer cavity is positioned in the body, the body is provided with at least one fuel gas inlet communicated with the buffer cavity and at least two fuel gas outlets and is further provided with an air pressure buffering device, and the air pressure buffering device is used for absorbing transient fluctuation of air pressure in the body. According to the pressure-stabilizing fuel gas distributor, in the fuel gas distribution process, the transient fluctuation of the air pressure in a gas transmitting pipe can be buffered and absorbed, the gas supply process is more stable, and the gas supply requirements of a multi-cylinder gas engine are met.

The invention relates to a vapor-liquid-solid spiral-flow type stabilized-pressure mixing conveyor, which comprises a tank body, an oil-inlet pipe and an oil-outlet pipe, wherein the oil-inlet pipe and the tank body are orthogonally connected, the tail end of the oil-inlet pipe is bent along the circumferential direction of the tank body, an oil outlet is arranged in the bottom of the tank body, the inner end of the oil-outlet pipe extends towards the upper part in a tank to form an oil inlet, and the oil-outlet pipe extending in the tank is higher than the oil-inlet pipe. The oil-inlet pipe and the tank body are orthogonally and fixedly connected, so that the vapor-liquid-solid spiral-flow type stabilized-pressure mixing conveyor is easy to machine, the concentration of stress is reduced, the stressed situation of the integral structure of the tank body is greatly improved, and the structural stability of the tank body is improved.

The invention discloses a through-hole capacitor and a manufacture method, wherein the through-hole capacitor at least comprises a base plate, a positive layer, a dielectric layer, a first negative layer and a second negative layer. The base plate is provided with a plurality of through holes, the surface of at least a through hole is provided with the positive layer, the surface of the positive layer of at least a through hole has a porous structure, and the dielectric layer is arranged on the porous structure of the positive layer. The first negative layer covers the surface of the dielectric layer, the second negative layer covers the surface of the first negative layer, and the electric conductivity of the second negative layer is bigger than that of the first negative layer. When the negative layers are transmitted as signals, the through-hole capacitor can be used as a matched structure of impedance.

The invention belongs to a hydraulic control technology, and particularly relates to a pressure stabilization overflow valve for a hydraulic control system of an automatic transmission. At present, the pressure stabilization function is achieved mainly through cooperation of multiple function valves, the overflow valve is liable to be affected by pressure fluctuation, the structure is complex, and the occupied mounting space is relatively large. The novel pressure stabilization overflow valve comprises a valve sleeve, a valve core, springs, a limiting plug, an oil return hole, a working hole and an oil inlet, wherein the limiting plug is in threaded connection with one opening end of the valve sleeve; the oil inlet is in the other end of the valve sleeve; the valve core is a cylindrical slide valve; the valve core has an annular bulge on the outer side; an axial oil hole and a radial overflow hole which communicates with the axial oil hole are formed in the side, near the oil inlet, of the valve core; and the limiting plug presses the valve core on the step surface of an inner hole of the valve sleeve through the springs. According to the novel pressure stabilization overflow valve, the problems that a pressure stabilization device in the hydraulic control system of the automatic transmission is affected by pressure fluctuation at the back end, the structure is complex, and the occupied mounting space is relatively large are solved.

The rectifying voltage regulator for mixed power vehicle includes reference circuit, sample circuit, trigger circuit and rectifier circuit, and the sample circuit has input connected to the reference circuit and the voltage output of generator and output connected via the trigger circuit to the rectifier circuit. The present invention features the rectifier circuit including 4 SCR's, SCR1-4, and 8 diodes, D1-8; SCR1-4 with anodes connected together, cathodes connected separately to the tail ends of 4 windings, JF1-4, of the permanent magnetic AC generator and separately via D5-8 to the trigger circuit; and the windings, JF1-4, in phase difference of 90 deg and with four first ends connected in '+' connection to one point. The present invention samples directly from the voltage output of the four-phase permanent magnetic generator and the output voltage is converted into stable DC voltage to drive the power consumers or to charge the accumulator.