45results about How to "Low excitation voltage" patented technology

An electric system that includes a single-phase permanent-magnet electric machine and a control system for driving the electric machine. The control system sequentially excites and freewheels a winding of the electric machine so as maintain substantially constant power over an operating speed range spanning at least 10 krpm and/or an excitation voltage range extending between a minimum voltage and a maximum voltage, the minimum voltage being less than 80% of the maximum voltage. Additionally, a product comprising the electric system.

A micro electric field transducer of static comb excitation differential detection type is prepared as setting positive induction electrode and negative induction electrode under shielding electrode or in the same plane of earthing shielding electrode, carrying out reciprocal and periodical vibration in said plane by shielding electrode under excitation of static comb to periodically shield and expose positive or negative induction electrode in order to let positive or negative induction electrode generate alternative induction current for realizing detection of external electric field.

The invention relates to a generator rotor ground protection method through voltage division by using resistors. The generator rotor ground protection method comprises a Ping-Pong-type generator rotor ground protection method through voltage division by using resistors and an injection-type generator rotor ground protection method through voltage division by using resistors. The generator rotor ground protection method is characterized in that exciting voltage which is input into a protection screen is reduced, whether a ground fault occurs on the lead of an exciting circuit or the lead of a measuring circuit is correctly judged through switching of different extraction resistors, and theoretical data is provided for troubleshooting of field fault points by calculating the ground resistance and the positions of two positioned points. Aiming at overcoming the defects existing in the traditional Ping-Pong-type and injection-type generator rotor ground protection methods and further improving the traditional Ping-Pong-type and injection-type generator rotor ground protection methods, by reducing the exciting voltage input into the protection screen, the requirement on the measurement accuracy of the ground resistance and the position of one point in the field is met.

Provided is an electron beam apparatus in which an electron beam emitted from an electron gun is separated by a plurality of apertures, images of said apertures are reduced in more than two stages to form multi-beams on a sample surface and to scan said sample thereby, and secondary electrons from said sample are passed through an objective lens, where distances between said secondary electrons are extended, further through an E×B separator, where said secondary electrons are separated from the primary beam, and finally onto secondary electron detectors, where said secondary electrons are detected, wherein a lens defined in the second step for reducing said image of the aperture is composed of two stage lens and an enlarged image of the secondary electron is formed on a position between a first and a second lenses of said two stage lens, thereby reducing an aberration of the optical system for detecting the secondary electrons and allowing as many multi-beams as possible to be formed in the vicinity of a single optical axis.

A piezoelectric actuator, especially for an ultrasonic motor, includes an acoustic oscillation resonator, wherein the acoustic oscillation resonator is substantially formed as a rectangular piezoelectric plate with two main surfaces, two side surfaces and two end faces and has a multilayer structure in its interior which represents a layer of excitation electrodes taking turns with the layers of the common electrodes and the layers of polarized ceramic provided therebetween, with the polarization vector extending perpendicularly with respect to the surface of the electrodes, wherein all excitation electrodes are divided into two groups not connected to each other, which are disposed symmetrically with respect to the symmetry surface of the aforementioned plate, wherein this symmetry surface extends perpendicularly with respect to the main and side surfaces of the plate, namely through the center thereof.

A micromechanical component, including an adjustable part that is connected, at least via springs, to the mounting, and an actuator device with which a first oscillating motion of the adjustable part is excitable about a first rotational axis and at the same time a second oscillating motion of the adjustable part is excitable about a second rotational axis. The actuator device includes four piezoelectric bending actuators, and the adjustable part is settable into the first oscillating motion and/or into the second oscillating motion by deformation of the four piezoelectric bending actuators, and each of the four piezoelectric bending actuators at its first end is anchored to the mounting, and the adjustable part is suspended, at least via the springs, on the four piezoelectric bending actuators.

An arrangement for measuring a rate of rotation using a vibration sensor, being excited and measured by means of capacitive drive elements, and the rotation of said sensor in an axis, excited by a rotation in another axis by means of the Coriolis force, being measured by means of capacitive measuring elements. Excitation voltages can be supplied to the fixed electrodes of the drive elements, the frequency of said voltages corresponding to the resonance frequency or the subharmonic of the resonance frequency of the vibration sensor. An alternating voltage having a first measuring frequency which is higher than the excitation frequency can be supplied to capacitive elements for measuring the excited vibration. Alternating voltages having a second measuring frequency higher than the excitation frequency are supplied to the fixed electrodes of the measuring elements can be supplied to drive elements causing a vibration excitation in a direction on the basis of the excitation voltage, being in antiphase with the excitation voltage.

The invention discloses a medium-power CO2 laser tube, its main character: the discharging tube and water cooled tube are placed in a large gas storage tube, two ends of which is sintered with the water cooled tube, there are at least two groups of discharging tubes and water cooled tubes, the end parts and tail parts between components are sinter into a serial light path in II, V or W shape, each discharging tube is opened to the large gas storage tube through a back gas tube connected with, the former discharging tube's initial end is set with a full reflector and the latter discharging tube end is set with an output coupling mirror, all the head and tail sintered ends of the two discharging tubes are set with full-reflecting refractors and all the inner electrodes of the two discharging tubes are connected with DC power supply. Its bulk is small and it is light and not influenced by temperature variation, the output power and facular mode are stable and it adopts DC power supply to excite in sections, effectively reducing exciting voltage and enlarging the control range of power and can be widely applied to laser processing industry.

This invention relates to a MEMS mm wave phase shifter with low excitation voltage and capable of controlling phase shift accurately, which fixes an inductance coil on the earth with the inductance volume over 10nH, in which, an insulation layer is set between the coil and the earth, said coil is connected with one end of the metal spring, the other end of the spring is connected with a metal bridge and supports it and a medium chip is set on the top surface of a signal line under the metal bridge.

The invention relates to a piezoelectric ultrasound motor comprising an oscillator in the form of a piezoelectric plate having a length L and a height H, and one or two friction elements which are arranged on the oscillator and elastically pressed against the friction surface of the part to be displaced. According to the invention, the piezoelectric plate is divided into two identical parts by a cutting plane extending perpendicularly to the large surfaces, at least one of said parts containing an asymmetrical generator which generates an asymmetrical two-dimensional standing wave during the control thereof, in such a way that the friction elements arranged in the centre of the long front side of the plate perform a movement which is inclined in relation to the front side, enabling the kinetic energy to be transferred to the part to be displaced.

The invention discloses a light intensity control unit used for reducing power consumption. The light intensity control unit contains N shutters. Each of the N shutters has M optical openings, and width of each of the M optical openings is a first width. The first width is not more than a preset width to minimize displacement distance of the shutters when the light intensity control unit carries out light intensity control. N and M are both positive integers. The invention also discloses a display module of the light intensity control unit, electronic equipment containing the display module and a light intensity control method realized by the light intensity control unit.

This invention discloses a kind of display faceplate, liking the display element in the same location of the odd number and even number row in the display element array of the display faceplate to different data wire, to make each date wire of the display faceplate keep unitary polarity in most time. Therefore, it can cut down the driving voltage of the data wire in display faceplate, achieving the province purpose by cutting down the power consumption of the faceplate.

A composite material comprising an organic compound and an inorganic compound represented by general formula (1), wherein, in general formula (1), R1-R24 are the same or different from each other, and represent hydrogen, alkyl, alkoxy, Any of aryl and arylalkyl. A light-emitting element includes the composite material and a light-emitting device, and an electronic device includes the light-emitting element. Compared with organic compounds, the composite material of the present invention has excellent carrier transport performance and excellent carrier injection performance, and has high visible light transmittance. By utilizing this composite material, a current excitation type light emitting element requiring low excitation voltage and having excellent luminous efficiency is obtained. By using the light emitting element, there are provided a light emitting device that consumes low energy and an electronic device including the light emitting device.

The invention provides a method for constructing an electrochemical luminescence aptamer sensor for sensitively detecting omethoate. The method comprises the following steps: step 1, preparing molybdenum telluride (MoTe2) quantum dots; step 2, preparing a molybdenum telluride/2-methylimidazole zinc salt (MoTe2/ZIF-8) nano compound; and step 3, constructing the electrochemical luminescence aptamer sensor for sensitively detecting omethoate. The electrode material of the sensor adopts ZIF-8 with defects caused by quantum dots, so that the excitation potential of the material is effectively reduced, and the sensitivity of the sensor is greatly improved. Based on the excellent ECL performance of MoTe2/ZIF-8, an OMT aptamer with specific recognition is combined, and an ECL aptamer sensor is successfully prepared and used for OMT monitoring. Meanwhile, the electrochemical luminescence detection method of OMT provided by the invention has the characteristics of simplicity, convenience and flexibility in operation, simple instrument and equipment, wide detection range, low detection limit, low detection cost and the like.

The invention discloses a hybrid power turbocharging system. The hybrid power turbocharging system comprises an internal combustion engine, a waste gas turbine, a gas compressor, a motor and a storagebattery; during working, the waste gas turbine is driven by waste gas of the internal combustion engine or the motor; when the flow of the waste gas is large and the waste gas turbine drives a main shaft to rotate at a high speed, the motor acts as a generator, so that the energy of a part of waste gas is absorbed, and the energy is stored in the storage battery; and when the flow of waste gas issmall and the main shaft rotates at a low speed, the motor serves as an electromotor, the electric energy in the storage battery is converted into mechanical energy to drive the gas compressor, so that the pressurizing effect of the gas compressor is ensured. According to the hybrid power turbocharging system, the motor can be used for deploying the energy flow direction according to the rotatingspeed of the turbine.

The present invention discloses a three-phase continuous flow induction-heat green sterilization system and method and belongs to the field of light industry. A fluid system of a three-column magneticcircuit structure is used, a three-phase excitation technology based on a liquid food winding is developed, an electric power technology is integrated to design a continuous flow pipeline system, fluid food serves as a three-phase circuit, internal resistance of fluid is reduced, compared with a single-phase transformer structure, three-phase continuous flow induction-heat green sterilization system has stability and universality, and the system adopts double liquid storage tanks, further reduces the internal impedance of the fluid food, can improve induction electric field intensity and induction current density in the liquid food and can be improved by three times, and has higher sterilization efficiency. The provided three-phase continuous flow induction-heat green sterilization systemhas a sterilization temperature of 60-65 DEG C, treatment time shorter than 15 s, and can provide a green sterilization technology for many enterprises including liquid food enterprises, traditionalChinese medicine extract production plants and the like.

The invention discloses a high-efficiency excitation generator automatic voltage regulator, comprising a shell and an internal circuit, wherein the shell adopts plastic bottom case and completely encapsulated by resin, and metal connector are subjected to moistureproof and anti-salt fog treatment, so that high-efficiency excitation generator automatic voltage regulator can be used in environment at the temperature of -40 to 80 DEG C and with humidity of 95% and no frost; an external damping device is fixed in the combined group of electric generator boxes; the internal circuit comprises a voltage divider, a voltage divider, a direct current mixer, a comparison amplifying circuit, a stable feedback circuit, an electric generator slope, a horizontal detector, an excitation regulation circuit, a low-frequency detecting DIP, reference voltage, a synchronous circuit, a power supply, a low pass filter, a rectification suppression circuit and a power control device. The high-efficiency excitation generator automatic voltage regulator has the advantages that: 1, the stead-state voltage regulation factor and the temperature difference stability are good; 2, the stability is good, and thus being capable of adapting to sudden increase or reduce of load; 3, the antijamming capability is strong, and the heat dispersion is good; 4, a high-efficiency semiconductor is used in the circuit so that the lower excitation voltage (more than 5V) is ensured to be obtained by excitation.

The invention provides a centralized generating set of a renewable energy source, comprising a main power supply, a plurality of auxiliary power supplies, an energy storing device and two DC (direct current) voltage buses, wherein an AC (alternating current) side of the main power supply (ZDY1) is connected with a power grid or an electro-load, and a DC side of the main power supply (ZDY1) is connected with a DCBus 1 (direct current bus 1) and a DCBus 2 (direct current bus 2); the output of each auxiliary power supply (FDY1...FDYn) is connected to the DCBus 1 and the DCBus 2; and an output or input end of the energy storing device (CNZZ1) is connected with the DCBus 1 and the DCBus 2. The centralized generating set can realize coordination control among distributed power supplies (namely various generating sets of renewable energy sources) without the electro-load, thereby adjusting output electric energy so as to meet demands of the power grid or the electro-load.

The invention discloses an outer electrode UV lamp tube with a transparent electrode. The outer electrode UV lamp tube comprises a lamp tube body, conductive gas, conductive coatings and the transparent outer electrode. The lamp tube is filled with conductive gas, the inner walls of the two ends of the lamp tube are coated with conductive coatings, the conductive coatings completely cover the inner walls of the two ends of the lamp tube, and the transparent outer electrodes are pasted on the outer surfaces of the two ends of the lamp tube; and the transparent outer electrodes are as long as the conductive coatings and completely cover the outer surfaces of the two ends of the lamp tube. The transparent outer electrode is adopted, the light-emitting area is large, and the light-emitting efficiency is high; the inner walls of the two ends of the lamp tube are coated with the transparent conductive coatings, impedance between the two electrodes is low, excitation voltage of the lamp tube is low, and ultraviolet radiation intensity is high.

The invention relates to the technical field of veterinary backfat instruments, in particular to a veterinary backfat instrument and a using method thereof, aiming to solve the problem of inaccurate reading caused by unstable reading of backfat by the veterinary backfat instrument in the prior art. A first excitation voltage is selected as an excitation source to send ultrasonic signals, a first gain resistor is selected as a gain resistor of a secondary amplifier, signal echoes pass through a primary amplifier and then enter a detector, the detected signals enter the secondary amplifier, andthe signals pass through the secondary amplifier and then enter an analog-digital converter to be subjected to analog-digital conversion; and the converted numerical value is read by a programmable logic device at a high speed, the obtained digital discrete signal is subjected to down-sampling processing, then the processed data is sent to a main controller, and the main controller sends the processed data to a display screen to be displayed. The backfat instrument is dynamically adjusted according to the echo intensity during testing, so that the echo amplitude is stable, and the reading of the backfat instrument is more accurate.