51 results about "Electrical dynamics" patented technology

A neurostimulator system (170) stimulates excitable muscle or neural tissue through multiple electrodes (E1, E2, . . . En) fast enough to induce stochastic neural firing, thereby acting to restore “spontaneous” neural activity. The type of stimulation provided by the neurostimulator involves the use of a high rate, e.g., greater than about 2000 Hz, pulsatile stimulation signal generated by a high rate pulse generator (172). The stream of pulses generated by the high rate pulse generator is amplitude modulated in an output driver circuit (176) with control information, provided by a modulation control element (178). Such amplitude-modulated pulsatile stimulation exploits the subtle electro physiological differences between cells comprising excitable tissue in order to desynchronize action potentials within the population of excitable tissue. Such desynchronization induces a wider distribution of population thresholds, as well as a wider electrical dynamic range, thereby better mimicking biological recruitment characteristics.

A method and apparatus for the manipulation of colloidal particulates and biomolecules at the interface between an insulating electrode such as silicon oxide and an electrolyte solution. Light-controlled elektrokinetic assembly of particles near surfaces relies on the combination of three functional elements, the AC electric field-induced assembly of planar aggregates; the patterning of the electrolyte / silicon oxide / silicon interface to exert spatial control over the assembly process; and the real-time control of the assembly process via external illumination. The present invention provides a set of fundamental operations enabling interactive control over the creation and placement of planar arrays of several types of particles and biomolecules and the manipulation of array shape and size. The present invention enables sample preparation and handling for diagnostic assays and biochemical analysis in an array format, and the functional integration of these operations. In addition, the present invention provides a procedure for the creation of material surfaces with desired properties and for the fabrication of surface-mounted optical components. This invention is also for a method and apparatus to direct the lateral motion and induce the assembly into planar arrays of cells on semiconductor surfaces in response to temporally and spatially varying electric fields and to projected patterns of illumination.

A device for manipulating an object present in a fluid by electrokinetics is disclosed. The device comprises a substrate forming a flow chamber. The device further comprises a plurality of electrically biasable electrode structures and at least one electrically floating electrode structure.

In servomechanisms, like for example used in disk drives, disturbances, for example, friction, shock and vibration, prevent the system positioning accuracy from further improvement. These disturbances occur in a relatively low-frequency range compared to the electrical dynamics. In the present invention, an acceleration feedback control loop using a frequency-separated acceleration soft sensor (350) replaces the conventionally used current control loop in the low frequency range, where the disturbances occur, so as to attenuate the influence of the disturbances enclosed in the loop. The current feedback continues to manage the electrical dynamics in the high-frequency range. Estimating the required acceleration signal by a soft sensor (350) eliminates the need for physical accelerometers, which reduce system reliability and increase system cost. The acceleration feedback control loop constructed with the obtained acceleration signal also makes the system more robust to the parameter inaccuracies and variations within the loop. This invention can be easily implemented with either software or hardware.

The invention belongs to the technical field of environmental management, and particularly relates to an electrodynamic remediation device and a method for soil polluted by heavy metal or organic matters. The device is composed of a direct-current power supply, an anode chamber, a gas collecting device, a soil chamber, an anode electrode and a cathode electrode. The device provided by the invention has the advantages that a soil solution which is near the electrode has electrochemistry element reaction under the power-driven pressure, the physicochemical properties such as redox potential and pH value in the coil are changed, the low-permeability soil can have high conductivity through hydroxypropyl-beta-cyclodextrin, and the desorption of the heavy metal or organic matters in a soil solid is accelerated.

The invention concerns a method, device and computer program product for controlling a voltage source converter (16; 20) connected to a power grid (12; 24). The device (25; 26) includes a first input for receiving at least one detected electrical property (E, i) of an interface between the grid and the voltage source converter, and a control entity (27; 28) arranged to control the voltage source converter (16; 20) through using a control signal (vREF,TR) obtained through using a mapping of an electrical model of a non-salient synchronous machine onto an electrical model of the voltage source converter and through applying the detected electrical property of the interface between the grid and the voltage source converter in said mapped model, where the electrical model of the non-salient synchronous machine reflects the electrical dynamics of this synchronous machine.

A method for operating a linear compressor includes measuring a current induced in a motor of the linear compressor and calculating an observed current of the motor of the linear compressor using at least an electrical dynamic model for the linear compressor and a robust integral of the sign of the error feedback. The method also includes detecting a head crash within the linear compressor if an error between the observed current of the motor of the linear compressor and the measured current induced in the motor of the linear compressor is greater than a crash threshold.

The invention discloses a variable-speed double-fed wind power station clustering equating method based on mechanical and electrical dynamic characteristics. Firstly, a system containing a wind power station is quickly initialized to determine an initial operating point. According to the types of selected double-fed wind generators and by means of offline calculation, the wind speed upper limit and the wind speed lower limit of the remarkable change of transient-state electrodynamic potential dynamic characteristics of the wind generators are determined, and the wind generators are divided into three clusters. Secondly, the double-fed wind generators in the same cluster are respectively connected to an equivalent double-fed wind generator node through a complex ratio transformer, and interbuses, load buses, transient-state internal potential buses increased during equivalent and phase shift transformers in the wind power station are eliminated to obtain an equivalent network. Thirdly, according to the connection relation of an equivalent circuit of the wind generator and the principle of unchanged output mechanical power, equivalent wind generator parameters and equivalent wind speed are deduced. The variable-speed double-fed wind power station clustering equating method comprehensively considers electromechanical dynamic similarity degree of the double-fed wind generators and is particularly suitable for accurate equivalent operation of the wind power station with complex connection and large wind speed difference.

The invention relates to a method for repairing dichlorobenzene contaminated soil environment by using a non-uniform electrokinetics-persulfate oxidation combination method. The method comprises the following steps: providing a non-uniform electrokinetics-persulfate oxidation combination method repairing device; detaching a first electrode chamber, a second electrode chamber, a first isolation block and a second isolation block at the two sides of an electric reaction column according to demand, uniformly filling the electric reaction column with soil to be repaired, then assembling the repairing device, adding persulfate solution as electrode solution into the first electrode chamber and the second electrode chamber through liquid inlet holes, keeping the liquid levels of the two electrode chambers to be parallel, standing, and after the hydraulic power of the entire system is stable, applying a DC power supply between two columnar ion electrodes to repair the contaminated soil under the action of the formed non-uniform electric field. The method can be used for achieving efficient in situ repair of the dichlorobenzene contaminated soil and can be used for avoiding the common problems of electrode polarization and formation of an acidic band in the uniform electric field technology.

The invention discloses a system and a method by utilizing a fuel cell to treat organic wastewater and synchronously repair heavy metal in soil. The system comprises a microbiological fuel cell, a data acquisition regulation and control device and a soil electrodynamic remediation device. One end of the data acquisition regulation and control device is connected with an anode unit and a cathode unit through lead wires correspondingly; the other end of the data acquisition regulation and control device is connected with a negative electron and a positive electrode through lead wires correspondingly; and the data acquisition regulation and control device is used for acquiring a voltage signal generated by the microbiological fuel cell and for regulating and controlling the magnitude of electric current received by the soil electrodynamic remediation device. By utilizing the microbiological fuel cell to treat organic wastewater, wastewater is treated, and electric energy is generated to remove the heavy metal in the soil; the system and the method do not damage a soil structure and the organic content in the soil is not affected; and at the same time, the data acquisition regulation and control device is adopted, so that the electric energy utilization efficiency of the microbiological fuel cell is improved effectively and the removal rate of the heavy metal in the soil is reduced.

A low-dispersion methodology for designing microfabricated conduction channels for on-chip electrokinetic-based systems is presented. The technique relies on trigonometric relations that apply for ideal electrokinetic flows, allowing faceted channels to be designed on chips using common drafting software and a hand calculator. Flows are rotated and stretched along the abrupt interface between adjacent regions with differing permeability. Regions bounded by interfaces form flow “prisms” that can be combined with other designed prisms to obtain a wide range of turning angles and expansion ratios while minimizing dispersion. Designs are demonstrated using two-dimensional numerical solutions of the Laplace equation.

A method to restore heavy metal contaminated soil via electrodynamics in conjunction with plants belongs to the technical field of environmental protection. The method uses direct-current weak electric field to stimulate the growth of plants and improve the ability of the plants to adsorb and accumulate heavy metals. The method comprises: inserting a pair of electrodes into soil, with plant rootspositioned between the electrodes and the depth of the electrodes equal to plant root length; applying unidirectional direct-current weak electric field between the electrodes for exciting purpose, tobe specific, cultivating restoring plants under the weak electric field, dividing to obtain restoration belts, clearing them, installing a restoration device, planting restoring plants, and providingcontinuous power. The method has the advantages that the direct-current weak electric field is applied to a soil region under restoration, migration of the heavy metal contaminants in the soil is quickened, the growth of the plants is stimulated by the electric field, and the ability of the plants to adsorb heavy metals is improved as well; the method is simple to perform, low in cost and high inefficiency, is suitable for in-situ treatment of contaminated soil, and never causes a risk to the surroundings.

A system for manipulating electric fields within a microscopic fluid channel includes a fluid channel with an inlet and an outlet to support fluid flow, at least one controllable electric field producer that applies a non-uniform and adjustable electric field to one or more regions of the fluid channel, one or more sensors that measure one or more parameters of a fluid flowing through the fluid channel, and a controller with hardware and software components that receives signals from the one or more sensors representative of values of the one or more parameters and, based on the parameter values, drives one or more actuators to adjust the electric field produced by the plurality of electric field producers. A complex fluid including at least two components flows through the fluid channel, where at least one of the at least two components comprises

The present invention discloses a method for measuring the zeta potential at the cylinder's outer surface. In the measuring cell, the cylinder is held coaxially inside a reference tube and a given solution is forced to flow through the annular flow channel between the cylinder and the reference tube. The streaming potential induced by the flow forced with a hydraulic pressure drop is measured to determine the zeta potential, ζm, of the cylinder's outer surface by using the following Equation,E_ΔP==-Dμk(ζm+ζref2)Fwhere D is the permittivity, ζref is the zeta potential of the reference tube, μ is the viscosity of the solution, k is the electric conductivity of the solution, and F is a correction factor for the electrokinetic model. Moreover, this invention also discloses a system for measuring the zeta potential of the cylinder's outer surface.

The invention discloses an intelligent motion control method for a motor servo system. The intelligent motion control method belongs to the field of electromechanical servo control. The intelligent motion control method for the motor servo system is characterized by comprising the specific steps of: step 1, establishing a mathematic model of the motor servo system, and simplifying an electrical dynamic state of a motor as a proportional link according to Newton's second law; step 2, designing a multi-layer neural network to estimate unknown function disturbance suffered by the motor servo system; step 3, designing an extended state observer to estimate time-varying external interference of the motor servo system in combination with the three-layer neural network; step 4, and designing a motor servo system position tracking controller based on the multi-layer neural network and disturbance feedforward compensation. The intelligent motion control method can ensure that the position output of the motor servo system can precisely track an expected position instruction, thereby being more beneficial to application under complex working conditions in engineering practice.

A method for operating a linear compressor includes providing a dynamic model for a motor of the linear compressor, estimating values for each unknown constant of a plurality of unknown constants of the dynamic model for the motor and repeatedly updating the estimate for each unknown constant of the plurality of unknown constants of the dynamic model for the motor in order to reduce an error between a measured value for the electrical dynamic model and an estimated valve for the electrical dynamic model.

The invention concerns a method, device and computer program product for controlling a voltage source converter (16; 20) connected to a power grid (12; 24). The device (25; 26) includes a first input for receiving at least one detected electrical property (E, i) of an interface between the grid and the voltage source converter, and a control entity (27; 28) arranged to control the voltage source converter (16; 20) through using a control signal (vREF, TR) obtained through using a mapping of an electrical model of a non-salient synchronous machine onto an electrical model of the voltage source converter and through applying the detected electrical property of the interface between the grid and the voltage source converter in said mapped model, wherein the electrical model of the non-salient synchronous machine reflects the electrical dynamics of this synchronous machine.

A networked guideway transit system uses permanent magnet repulsion with induction-based repulsion within the networked guideway transport system, which can levitate passively with motion. Magnetic levitation technology is used to replace wheels as the primary means of vehicle suspension. The networked guideway transit system uses the permanent magnets to provide primary lift and uses electrodynamic repulsion to create centering forces at most operational speeds while integrating linear motor functions with the electrodynamic centering function. Further, the networked guideway transit system uses no moving parts in the guideways, which enhances reliability in the guideways.

A paper-based micro fluidic device suitable for electrokinetics and particularly isotachophoresis (ITP) and a kit comprising same is provided. Further, a method for the preparation of said paper-based micro fluidic device and a method of use thereof for the detection and / or separation of molecules of interest are provided.

The electric vs. mechanic bi-directional power conversion application has been traditionally and asymmetrically favoring at magnetic element as energy caching and buffering bridge, e.g. the electric motors and generators that are also abstracted as electromechanical devices. The theory behind electromechanical devices is electrodynamics. Based on the fast development of high energy density dielectric materials, my inventions are to be a game changer: let electrical field alone to take the heavy duty of electromechanical utilities, and let “dielectrodynamics” replace electrodynamics. Of the most importance is the key limitless high voltage generator, which can cover full gamut of voltages from volts to kilovolts (KV), megavolts (MV), gigavolts (GV), teravolts (TV), and whatever we need, just provided necessary space occupancy and mechanic work are secured to assist dielectric piston or blades displacement. As the nature of such an electric power supply, it is fit for pulse application, such as Z-pinch, particle accelerator, nuclear ignition, fusion reactor, ornithopter etc. Civil application is also possible, such as harvest wind power, pulse heating even with overunity and so on, but regular non-pulse application needs further power smoothing or conversion.It is the time of saying bye to Marx generator, rare earth magnetic materials, mile-size accelerator, country-size neutron spallation system and more, just cheerfully to embrace the epoch of powerful inexhaustible fusion energy and magnetic-free dielectrodynamic utilities.

The present invention discloses an apparatus and method for electromagnetic spacecraft propulsion. The apparatus includes capacitor assemblies bracketed by electromagnetic solenoids configured in Helmholtz Coil geometries. The action of magnetic fields generated in the solenoids on segmented currents in conductive discharge elements during capacitor discharge produces unidirectional forces, while reaction momentum is carried away by Poynting Vector electromagnetic fields in conformity with the currently understood principles of electrodynamics.

Microfluidic devices are disclosed for carrying out cyclic or iterated reactions such as PCR, LDR, and other cyclic or iterated reactions. A microchannel forms a closed loop, through which a reaction mixture may be thermally cycled an arbitrary number of times. Flow is preferably mediated primarily by electrokinetics. Multiple temperature zones may be employed along the course of a single microchannel loop, for example for PCR. Embodiments may be compact, automated, fast, and operable in continuous-flow mode. Real-time reaction monitoring may optionally be used.

The invention provides an anti-overheating electrical dynamic contact and a structure thereof, and belongs to the technical field of electrical switches. The anti-overheating electrical dynamic contact comprises moving parts, supporting parts and fixing shafts. The moving parts and the supporting parts are provided with shaft holes, the fixing shafts penetrate through the shaft holes to enable the moving parts and the supporting parts to be connected together after the moving parts and the supporting parts are stacked, and the moving parts and the supporting parts are in close contact through upper faces and lower faces. The dynamic contact can be suitable for static contacts of different thicknesses through the rotation angles of the moving parts, the dynamic contact can be tightly attached to the static contacts through planes, the effective contact area is greatly increased, the phenomena of heating and arcing caused by bad contact are reduced, and the ablation probability of the contact is lowered. Moreover, each moving part is provided with four working faces for standby application mutually, and the through-current capability is improved by overlaying metal sheets of the contact. The anti-overheating electrical dynamic contact has the advantages of being simple in structure, low in cost, high in applicability, good in safety, high in reliability, simple in technology, capable of being widely applied to electrical equipment and measuring equipment such as a disconnecting switch, a pincerlike clamping mechanism and a withdrawable circuit breaker, and the like.

The invention discloses a fan coiler cold and heat intelligent metering apparatus, which comprises an intelligent metering device, an interconnecting cable group, an electric dynamic flow holding valve(300), a backwater temperature sensor and a water supply temperature sensor.The electric dynamic flow holding valve(300), a backwater temperature sensor and a water supply temperature sensor are separately connected to an intelligent metering device by interconnecting cable group, while backwater temperature sensor is connected to electrical dynamic flow holding valve.

An integrated gel based microfluidic sample processing device, suitable for forensic investigations at the scene of a crime, including a substrate having a plurality of micro-channels to form at least a DNA extraction chamber in fluidic cooperation with an amplification chamber which in turn is in fluidic cooperation with a separation and detection channel. The micro-channels containing a DNA extraction material and gel based reaction reagents necessary for processing the sample. The device further having electrical contacts for coupling to an external power source and capable of inducing electro-kinetic manipulation of the gel based reagents and DNA extracted from the sample throughout the device.

The invention discloses an evaluating method for simulation performance of a wind turbine simulator, and particularly relates to an evaluating method for verifying whether the wind turbine simulator can simulate a real wind turbine accurately or not. Whether the wind turbine simulates static-state characteristic of the real wind turbine accurately or not is verified through comparing steady state CP with CP max at constant wind speeds of different wind speeds, parameters of mechanical dynamic and electrical dynamic in results of a test and simulation are compared through conducting a moving die test and the simulation to the same wind turbines under same turbulent wind speed sequence, whether the turbine simulator can simulate dynamic characteristic of the real turbine accurately or not is determined, and whether design of the turbine simulator is successful or not is measured through synthesizing simulated conditions of the turbine simulator to the static-state characteristic and the dynamic characteristic of the real wind turbine. The evaluating method for the simulation performance of the wind turbine simulator solves the problem that the simulation performance of the wind turbine simulator is uneven caused by lack of a systematic performance evaluating method of the wind turbine simulator, and contributes to enhancing accuracy and practicability of simulation of the wind turbine simulator.

The essence of the invention is a method and apparatus for thermally protecting the external surface of the structure of a space vehicle during atmospheric reentry. The method, in detail, uses a recently discovered fundamental electrodynamic combustion mechanism for alkali metals to burn the metal onto the surface of the outer wall of the vehicle. In this mechanism, a static electric field that is always inherent to the burning alkali metal surface interacts electrodynamically with the ionized particles streaming behind the atmospheric front shock wave that propagates in front of the vehicle such that the electrodynamic Lorentz force deflects the particles perpendicularly away from the original direction of the ionized atmospheric flow. Thus, convective heat flux into the vehicle's structure is prevented.An apparatus is also presented for coating the alkali metal onto the porous outer wall of the vehicle structure via transpiration from the interior of the liquid lightweight alkali metal.