87 results about "Partial current" patented technology

The invention relates to the process of monitoring fault currents in an electric low-voltage current circuit for alternating currents. The level of a differential current (IΔ) of two conductors (L, N) of the low-voltage current circuit is ascertained, and the level of the voltage (ULN) of the two conductors of the low-voltage current circuit is ascertained. A differential active current (IΔ,WIRK) or a differential reactive current (IΔ,BLIND) is ascertained from the level of the voltage and the level of the differential current, and the level of the differential active current or the differential reactive current is displayed.

The present invention discloses a nano copper-based catalyst, its preparation method, and its application in the electrocatalytic reduction of carbon dioxide and carbon monoxide. Copper chloride (or copper nitrate, copper acetate) is dissolved in ultrapure water, and a sodium borohydride solution is added dropwise. Stir at room temperature for 5-60 min, filter, and dry to obtain a nano copper catalyst. Further, through a displacement reaction, nano copper-palladium and copper-silver catalysts are obtained. The present invention is applied to the electrocatalytic reduction of carbon monoxide. In a membrane electrode assembly (MEA) electrolyzer, the Faraday efficiency of multi-carbon products (C2+) reaches up to 95%, the partial current density reaches up to 3 A cm-2, and the overall electrolyzer energy efficiency reaches up to 39%. It can stably electrolyze for 30 hours at 1 A cm-2. This nano copper catalyst is applied to the electrocatalytic reduction of carbon dioxide. In an MEA electrolyzer, the Faraday efficiency of C2+ reaches up to 66%, and the partial current density reaches up to 331 mA cm-2.

The invention belongs to the field of electro-catalysis, and particularly relates to a preparation method of a Cu foil loaded nano Cu2O electrode and application of the Cu foil loaded nano Cu2O electrode in pulse carbon dioxide electro-catalytic reduction. The surface of the Cu foil is modified by the Cu2O nano coating, the Cu2O nano coating is used for pulse carbon dioxide electroreduction reaction, and high methane selectivity and high current density are realized in carbon dioxide electroreduction by regulating and controlling pulse potential. The Faraday efficiency of the methane reaches 92% at-1.15 V vs.RHE, the partial current density of the methane is 111mA. Cm <-2 > at the moment, the stable operation time exceeds 110 hours and is not obviously attenuated, and the Faraday efficiency of the methane with the selectivity being 82% of an unmodified copper electrode is remarkably improved.

The present embodiments relate to an electric current sensor, a steering control device, and a method for detecting an electric current. An electric current sensor may comprise: a conductive part through which an electric current flows; a detection unit for detecting a magnetic field generated by the electric current flowing through the conductive part; a first generation unit for generating a first electric current sensing value on the basis of the resistance included in the conductive part; and a second generation unit for generating a second electric current sensing value on the basis of the magnetic field detected through the detection unit.

A control system includes a controller that is configured to determine a differential current of a heater based on a difference between a power conductor current of the heater and a neutral conductor current of the heater, determine whether the differential current of the heater is greater than a threshold differential current, and selectively perform a corrective action in response to the differential current being greater than the threshold differential current.

The invention relates to the process of monitoring fault currents in an electric low-voltage current circuit for alternating currents. The level of a differential current of two conductors of the low-voltage current circuit is ascertained, and the level of the voltage of the two conductors of the low-voltage current circuit is ascertained. A differential active current or a differential reactive current is ascertained from the level of the voltage and the level of the differential current, and the level of the differential active current or the differential reactive current is displayed.

The invention discloses a multi-cavity carbon nanorod packaged bismuth oxide catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps: constructing a composite micelle containing metal ions by using a dual-surfactant P123 and sodium oleate, co-assembling the composite micelle with a melamine oligomer generated based on a Schiff base reaction, and carbonizing and reducing to obtain the nitrogen-doped carbon nanorod loaded bismuth oxide nanoparticle catalyst with a chamber structure. The prepared catalyst has excellent catalytic performance and stability when applied to preparation of formic acid through reduction of carbon dioxide under electro-catalysis, the highest Faraday efficiency of formic acid under the potential of-1.3 V vs.RHE is 96%, and the partial current density of formic acid can reach 34.8 mA cm <-2 >. In the catalysis process of 42 h, the Faraday efficiency of formic acid can be kept at 86% or above, and the method has good application prospects.

The present invention relates to a process for the production of ammonia, comprising the steps of providing three reactant gases, namely a hydrocarbon-containing reactant gas, an air-based reactant gas, and a vapor-containing reactant gas; heating at least one of the three reactant gases with a fired burner device, whereby at least one heated reactant gas is obtained; feeding the at least one heated reactant gas and the remaining three reactant gases into an autothermal reformer; autothermally reforming the three reactant gases, whereby a reformed gas mixture is obtained; feeding the reformed gas mixture into an ammonia synthesis cycle with a synthesis cycle gas; converting the synthesis cycle gas in a converter, whereby ammonia is produced in the synthesis cycle gas; and splitting the synthesis cycle gas into a first partial stream and a second partial stream, characterized in thatthat the first partial flow to the fired burner device is supplied as hydrogen-containing fuel gas. Furthermore, the invention relates to a corresponding ammonia synthesis plant and a method for converting an ammonia synthesis plant.

The invention discloses a system and method for relieving alternating current and direct current stray current interference of a buried metal pipeline, and relates to the technical field of metal pipeline current corrosion and protection, and the system is composed of a reference electrode (CSE), a test piece (Coupon), a switch K1, a switch K2, a pipeline (Pipe), a capacitor (c), a diode (D), a variable resistor (R), a power supply (PW) and a grounding electrode (G). The alternating stray current flows to the ground from the capacitor, so that the influence of the interference of the alternating stray current on the pipeline is reduced; the direct-current stray electricity flows to the ground through the diode, a part of the current flowing to the ground flows to the pipeline from the defect position of the anti-corrosion layer of the pipeline through soil, the part of the current can exert cathode protection on the pipeline, and then the effect of inhibiting corrosion of the pipeline is achieved. The cathode protection potential is in a reasonable range, and the corrosion inhibition effect on the pipeline is better achieved.

The invention relates to the monitoring of fault currents in a low-voltage AC electrical circuit. The magnitude of the differential current between two conductors of the low-voltage circuit is determined. The voltage across the two conductors of the low-voltage circuit is also determined. From the voltage and differential current, a differential active current or differential reactive current is calculated. The magnitude of the differential active current or differential reactive current is displayed.

This invention discloses a method and system for obtaining the evolution of the space electric field in a self-sustaining neutron detector (SPND) insulating layer and calculating detector sensitivity, belonging to the field of neutron detection technology. The method includes: establishing a dynamic equation for charge density evolution; decomposing the total irradiation current density into a stable and time-varying component, and simulating the stable and time-varying current density distributions contributed by a single source particle under decay equilibrium conditions using the Monte Carlo method; obtaining an expression for the time-varying current density of the SPND, solving the dynamic equation for charge density evolution, and obtaining an analytical expression for charge density evolution; and based on the charge density distribution, obtaining the electric field intensity distribution through integration, and simulating the detector sensitivity. This method directly reveals the influence of detector parameters and neutron flux on the space electric field and its evolution, solving the problems of large computational load and long processing time in existing technologies, significantly improving computational efficiency, and thus achieving efficient simulation of the sensitivity of a self-sustaining neutron detector.

A test piece 14 and a counter electrode 13 having a shape conforming to the shape of a film formation surface 14A of the test piece 14 are arranged close to each other, and a film of a conductive polymer is formed on the test piece 14 by electrolytic polymerization. The method involves preliminarily obtaining conditions of the voltage and integrated current value under which a desired film thickness is obtained by electrolytic polymerization, and conducting electrolytic polymerization until the integrated value of current flowing between the counter electrode 13 and the test piece 14 reaches the integrated current value, while keeping a constant voltage between the counter electrode 13 and the test piece 14.

A semiconductor device including a super junction structure is disclosed. A semiconductor device (10) includes a transistor. The transistor includes a plurality of gate trenches (111) formed in a semiconductor substrate (100), the gate trenches (111) patterning the semiconductor substrate (100) into ridges (114). The transistor further comprises a gate electrode (110) arranged in at least one of the gate trenches (111). A source region (124), a channel region (122), a partial current diffusion region (126) are arranged in the ridge (114). The semiconductor device (10) further includes a super junction structure (117) arranged at a greater distance from the source region (124) than the channel region (122). The super junction structure (117) includes a first compensation region (118) of a first conductivity type and a second compensation region (119) of a second conductivity type. A doping concentration of a doped portion (120) of the second conductivity type of the channel region (122) decreases from a region close to the gate electrode (110) to a central portion of the ridge (114) in a second horizontal direction intersecting the first horizontal direction.

The application discloses a high-performance porous hydrogen bond network catalyst for CO2 reduction in an acidic medium to prepare multi-carbon products and a preparation method thereof, and relates to the technical fields of electrocatalysis and carbon neutralization. The catalyst is a composite material of a fluorine-modified hydrogen bond organic framework loaded with copper active centers, which is obtained by the reaction of N,N',N'-tetra-(p-aminophenyl)-p-phenylenediamine and 2-fluorobenzoyl chloride to obtain a fluorine-modified hydrogen bond organic framework MTHOF-2-F, and then adsorbing copper ions through a wet impregnation method and obtaining MTHOF-2-F@Cu after low-temperature activation. The catalyst catalyzes CO2 reduction to generate organic products containing two or more carbon atoms in an acidic electrolyte. Experimental results show that in an acidic medium with pH=1.5, the product faraday efficiency of the catalyst reaches more than 75%, the partial current density reaches 619.5 mA·cm-2, and the C2 / C1 ratio reaches 9.71. 2+ Product faraday efficiency reaches more than 75%, C 2+ Partial current density reaches 619.5 mA·cm ‑2 C2 / C1 ratio reaches 9.71.

This invention discloses a biphase copper foam electrode for the electrocatalytic reduction of nitrate to ammonia in a membrane electrode system, its preparation method, and its application. The electrode preparation method includes: ultrasonically cleaning the copper foam in ethanol, calcining it in a muffle furnace, and then performing in-situ reduction in a membrane electrode electrolysis cell to form an amorphous / crystalline biphase copper electrode. In performance testing of the electrocatalytic reduction of nitrate to ammonia in a membrane electrode system, this self-supporting amorphous / crystalline biphase copper electrode exhibits excellent performance, with a maximum ammonia Faradaic efficiency of 92% and a maximum ammonia partial current density of 3.5 A cm⁻¹. ‑2 The full-cell energy efficiency reaches up to 26%, and it can operate at 1.5A cm⁻¹. ‑2 The amorphous / crystalline biphase copper electrode and the corresponding membrane electrode testing process prepared in this invention significantly improve the reaction activity and stability, providing an important research foundation for promoting the industrial application of nitrate electrocatalytic reduction to ammonia.

The present invention discloses a partial current-reused voltage-controlled oscillator, which includes a first NMOS transistor, a second NMOS transistor, a reverse-coupled differential transformer, and a variable capacitor array. The reverse-coupled differential transformer includes a first inductor, a second inductor, a third inductor, and a fourth inductor. There is a first forward coupling coefficient K1 between the first inductor and the third inductor, and a second reverse coupling coefficient K2 between the second inductor and the fourth inductor. The drain of the first NMOS transistor is connected to a power supply. The source of the first NMOS transistor is connected to one end of the first inductor. The gate of the first NMOS transistor is connected to one end of the third inductor, one end of the variable capacitor array, and serves as a first output terminal. The other end of the third inductor is connected to a first bias voltage. The other end of the first inductor is connected to a first input voltage through one end of the second inductor. The other end of the second inductor is connected to the drain of the second NMOS transistor, and the source of the second NMOS transistor is grounded.

The utility model discloses an offshore wind power cathode protection device, which relates to the technical field of offshore wind power equipment and comprises a protection shell, a mounting bottom shell is arranged on the lower side of the protection shell, a plurality of mounting through grooves are uniformly formed in the mounting bottom shell, and wind power cathodes are assembled on the upper side of the mounting bottom shell through the mounting through grooves. Quick-release side covers are arranged on the left and right sides of the protective shell and located between the protective shell and the lower mounting bottom shell, and rotating rods are rotationally connected to the left and right sides of the inner sides of the quick-release side covers. A distributed anode arrangement mode is adopted, current is effectively dispersed, electric field distribution is balanced, corrosion caused by over-dense local current is prevented, the electric field distribution is optimized by adjusting the distance between the anode and the cathode, the protection range is expanded, the effect is improved, the device adopts the design of the quick-release side cover and the rotating rod, the installation and maintenance process is simplified, and the cost is reduced. And rapid maintenance in an offshore wind power environment is facilitated, so that the service life of equipment is prolonged, the maintenance cost is reduced, and the reliability and stability of an offshore wind power system are improved.

The embodiments provide an electrode catalyst layer for an electrolysis cell, and also an electrolysis cell and a carbon dioxide electrolysis apparatus comprising that layer. The catalyst layer has a controlled porous structure, and can realize a high partial current density. The catalyst layer of the embodiment comprises carbonous catalyst carriers, a metallic catalyst loaded on the carriers, and an ion-conductive material. The catalyst layer contains pores of 5 to 200 μm diameters, and the pores have a volume per weight of the catalyst layer in the range of 3.0 to 10 mL / g in total.

A current detection device detects an electric current. The current detection device includes a first conducting portion, a second conducting portion, and a current sensor. An electric current flows through the first conducting portion in a specific direction. The second conducting portion is provided at a position separated from the first conducting portion in the specific direction and through which an electric current flows in the specific direction. The current sensor detects an electric current flowing through the first conducting portion. The current sensor is located at a position aligned with the first conducting portion in an orthogonal direction orthogonal to the specific direction and separated from the second conducting portion in the specific direction. The current sensor includes a sensor element which detects a magnetic flux generated by the electric current flowing through the first conducting portion and an element protector which protects the sensor element.

The present invention relates to a method for calculating inductance, specifically a method for rapidly calculating the inductance of a superconducting coil that considers current distribution in the width direction. The method comprises the following steps: S1: Target object confirmation: Establishing a spatial coordinate system for the superconducting coil and determining the path function of the superconducting coil; S2: Current element division: Dividing the current elements based on the geometric dimensions of the strip and coil; S3: Numerical integration: Combining the Neumann formula and the geometric mean distance principle, first calculating the geometric mean distance between the current elements, taking into account the influence of width, then calculating the self-inductance and mutual inductance of each divided current element, and then superimposing and summing the results to obtain the calculated inductance value of the target superconducting coil. Compared with the prior art, the present invention addresses the drawback of the prior art of extremely large computational complexity when considering current distribution in the width direction. This solution simplifies the calculation process of the superconducting coil inductance while ensuring calculation accuracy.

Systems, methods, and apparatus are provided for electrically shielding a heated component, more specifically, in a manner compatible with a circuit protected by a GFCI (Ground Fault Circuit Interrupter). An example is a heated component that is electrically shielded, comprising: a conductor which is a heating element connected between a power line and the neutral line of the circuit from a GFCI; and a shield adjacent to the conductor and connected to the GFCI, the shield receiving a portion of the current from the conductor and returning a portion of the received current to the GFCI.

An example apparatus for monitoring contamination on a discharge electrode (3, 4, 5, 6, 7, 8), the apparatus having at least one emission peak (32) for non-contact discharge of a charged surface, comprising: a ground terminal (21) connected or connectable to the discharge electrode (3, 4, 5, 6, 7, 8); and a control device (27) configured to: detect a partial current coupled from the at least one emission peak to ground; determining an active power on the basis of the partial currents (I1 (t), i2 (t), i3 (t)); and generating a state signal based on the calculated active power (i1 (t), i2 (t), i3 (t)).

To achieve good diode characteristics.SOLUTION: A semiconductor device includes a semiconductor substrate, a bottom electrode and a gate electrode. The semiconductor substrate has a p-type collector region, an n-type cathode region and an n-type specific region which are arranged between a buffer region and the bottom face of the semiconductor substrate. The semiconductor device includes a transistor part and a diode part. Current flows in the transistor part depending on gate voltage. Current flows in the diode part depending on forward bias voltage. The collector region is arranged in at least a part of the transistor part and at least a part of the collector region is exposed from the bottom face of the semiconductor substrate. The cathode region is arranged in at least a part of the diode part and is exposed from the bottom face of the semiconductor substrate. The specific region is arranged in at least a part of the diode part and is also arranged between the cathode region and the buffer region. A p-type impurity concentration in the specific region is lower than a p-type impurity concentration in the collector region.SELECTED DRAWING: Figure 1

A method of monitoring a radiation dose includes impinging an electrode with radiation and measuring a current through the electrode. Emission of secondary electrons emitted from the electrode provides a majority of the current.

The invention discloses a catalytic electrode material and a preparation method and application thereof, the catalytic electrode material comprises a catalytic electrode base material and a copper nanosheet loaded on the surface of the catalytic electrode base material, and the catalytic electrode base material is selected from a porous copper base material; the catalytic electrode material can be applied to ammonia production through electro-catalysis of nitrate and / or nitrite reduction, or removal of nitrate and / or nitrite in waste water is achieved through electro-catalysis of nitrate and / or nitrite reduction, the copper nanosheets grow on the surface of the porous copper base material in a loaded mode, enough active sites can be exposed, high grain boundary density is achieved, and the catalytic electrode material can be applied to ammonia production through electro-catalysis of nitrate and / or nitrite reduction. The activity of catalyzing electrochemical reduction of nitrate and / or nitrite can be improved, the NH3 Faraday efficiency and the partial current density are improved, and then the ammonia yield or the removal efficiency of nitrate and nitrite can be improved.

The embodiments provide a method to produce an electrode catalyst layer for reduction of carbon dioxide. The catalyst layer is made to exhibit high partial current density and to endure a long-term operation by controlling the wettability. The catalyst layer comprises a metallic catalyst supported on carbon material, an ion-conductive material, and a hydrophilic polymer; and is characterized in that a BET specific surface area (AN2) of said catalyst layer determined by nitrogen gas-adsorption and a BET specific surface area (AH2O) of said catalyst layer determined by water vapor-adsorption are in a ratio (AH2O / AN2) of 0.08 or less.

The invention relates to a preparation method and application of a bismuth trioxide anchored metal-organic framework catalyst, belongs to the field of electrode materials for catalyzing reduction of carbon dioxide, and particularly relates to a method for constructing an MOF confined Bi catalyst through a subject-object synthesis strategy by using a metal-organic framework material (MOF: PCN-222) with a clear structure and coordination as a carrier. And high-activity and high-stability electrocatalytic CO2 reduction is realized. According to the present invention, the reaction activity of the catalyst added with different Bi (NO3) 3.5 H2O ratios is compared through the electrochemical test, the final product Bi2O3 (at) PCN-222-2 sample has the optimal performance, the HCOOH Faraday efficiency can achieve 89.42% in the carbon dioxide saturated 0.005 M H2SO4 solution and the 0.5 M K2SO4 solution at the-1.8 V vs.RHE potential, and the HCOOH partial current density can achieve-268.7 mA cm <-2 >. The Bi2O3-coated PCN-222-2 catalyst material prepared by the method has an extremely high industrial application prospect in electroreduction of carbon dioxide, and can be widely applied to the field of electroreduction of carbon dioxide electrochemical energy storage devices.

The application discloses a kind of multi-modal fracture closed-loop rehabilitation methods and systems for nerve remodeling, comprising: collecting the multi-modal data when executing rehabilitation gait action under the action of phase-specific electrical stimulation, at least including electroencephalogram signal, near-infrared blood oxygen signal, electromyogram signal, joint angular velocity signal and foot sole pressure signal;After the multi-modal physiological parameter data is preprocessed, fusion analysis is carried out, specifically, the motion intention and concentration state evaluation score and the first partial current are estimated, the action category and completion degree score are estimated, the second partial current is output based on the phase-specific site scheme, the total current is set with the action category and completion degree score as weight and combined with the first partial current and the second partial current, and the specific treatment electrode site and electrical stimulation treatment parameter are comprehensively output and fed back to control corresponding electrode to apply phase-specific distributed electrical stimulation. Thus multi-modal information fusion evaluation and on-demand auxiliary regulation can be realized, nerve remodeling is effectively promoted and rehabilitation training effect is improved.

A resistor includes an elongated cylindrical body having nodes and elongated members. The elongated members interconnect the nodes to form openings between the nodes and the elongated members for the flow therethrough of a cooling fluid. The body is configured to receive electric current from a powered system and to conduct and provide electric resistance to the electric current to dissipate at least part of the electric current as heat from the body. The body may be coupled with at least one other resistor of the powered system in one or more of a parallel or series arrangement in an electric circuit.

The invention relates to residual current protection of a low-voltage AC circuit with a differential current sensor unit (ZCT) for determining the magnitude of a differential current between two conductors of the low-voltage circuit. A voltage sensor unit (SUA) is provided for determining the voltage between the two conductors of the low-voltage circuit. A control unit (SE) is provided, which is connected to the differential current sensor unit (ZCT) and the voltage sensor unit (SUA). A differential active current is calculated from the voltage and differential current. The differential active current is compared with a first current limit or a first current-time limit. If the first current limit or the first current-time limit is exceeded, current flow in the low-voltage AC circuit is prevented.