1950 results about "Direct current" patented technology

The invention relates to a simple and reliable touch control switch. The simple and reliable touch control switch consists of a 12-V direct-current power supply, a one-way silicon controlled rectifier 1 (SCR1) trigger circuit, a one-way silicon controlled rectifier 2 (SCR2) trigger circuit, a relay control circuit and a load RL circuit. A conventional mechanical self-locking rocker switch or a toggle switch has the defects that actions are mechanical, operating actions are different because of persons, a contact is easy to jitter, a contact is easy to ablate, abrade and the like. The touch control switch is realized by only using a small number of common components and two touch metal pieces, namely an on-load circuit is switched on by touching a touch electrode once, and an off-load circuit is switched off by touching the touch electrode once. The overall touch control switch is made of discrete components, and strong electricity can be effectively isolated from weak electricity through a relay, so that the power supply of a load can use alternating current and also can use direct current. Therefore, the touch control switch has a certain function in the field of household appliances, industrial automation, and optical, mechanical and electrical integration.

The invention provides an array substrate and a display device, and the array substrate comprises a substrate; the gate insulating layer is arranged on the substrate; the data line is arranged on the gate insulating layer; the first passivation layer is arranged on the gate insulation layer and covers the data line; the first shielding electrode is arranged on the first passivation layer, and the first shielding electrode is connected with the direct-current voltage signal output end; the second passivation layer is arranged on the first passivation layer and covers the first shielding electrode; the common electrode is arranged on the second passivation layer, and a part of the common electrode is overlapped with the data line and the first shielding electrode; the pixel electrode and the common electrode are arranged on the same layer or stacked, and the pixel electrode is insulated from the common electrode. The first shielding electrode is connected to the direct-current voltage signal, so that the data voltage signal on the data line does not affect the signal on the common electrode, coupling capacitance between the common electrode and the data line is avoided, and poor display of picture flicker is avoided.

The application discloses a storage and charging integrated device, a charging control method, a charging pile and a charging system. The storage and charging integrated device comprises an energy storage module, a direct current conversion module and a charging module. The input end of the direct current conversion module is configured to receive an externally input first charging power. The first output end of the direct current conversion module is connected with the first end of the charging module, the second output end of the direct current conversion module is connected with the first end of the energy storage module, and the second end of the charging module is connected with the second end of the energy storage module. The charging module is connected in series with the direct current conversion module and the energy storage module, and is configured to output or receive electric energy to a device to be charged. In this way, the storage and charging integrated device can be matched with various devices to be charged in terms of voltage, the application range of the storage and charging integrated device is expanded, and the charging efficiency is improved.

A system includes: an alternating current (AC) to direct current (DC) converter (AC-DC converter), the AC-DC converter connectable to a line voltage; and a DC to DC converter (DC-DC converter) connected to the AC-DC converter, the DC-DC converter including: a high voltage buck-boost converter having a secondary side connectable to a high voltage battery; a low voltage buck-boost converter having a secondary side connectable to a low voltage battery; and one or more transformers having a primary side connected to the AC-DC converter, a secondary side connected to a primary side of the high voltage buck-boost converter, and a tertiary side connected to a primary side of the low voltage buck-boost converter.

This invention discloses a method and system for extracting and associating physical and logical circuits in a DC control and protection system. The method includes: constructing physical circuits based on engineering design drawings and optical cable documents; parsing the graphical program of the DC control and protection device to extract communication-related symbol information and constructing logical circuits; and representing the circuit data using a directed graph to associate the physical and logical circuits. This invention can efficiently realize the automatic construction and association of communication circuits, improving the efficiency of communication circuit diagnosis, debugging, and operation and maintenance in ultra-high voltage DC control and protection systems.

The application discloses a deposition device based on a programmable electrode array and a patterning deposition method, which comprises the following steps: generating charged particles and / or mist droplets by a charged particle source; an insulating substrate comprises a front surface for receiving deposition and a back surface opposite to the front surface; a programmable electrode array is arranged on the back surface of the insulating substrate and used for guiding the deposition of the charged particles and / or the mist droplets; a voltage driving unit is used for providing independent voltage signals for the electrode unit, and the voltage signals are pulse signals or direct current signals; and a control unit is used for programming and controlling the output of the voltage driving unit according to a target pattern, so that the programmable electrode array forms a spatial electric field corresponding to the target pattern on the front surface of the insulating substrate. Through the deposition device based on the programmable electrode array and the patterning deposition method, any pattern can be generated and changed instantly through programming of an electric field, and a physical mask is replaced by an electric mask, so that the physical mask is not needed, and the flexibility is extremely high.

This application discloses a portable online electrochemical impedance spectroscopy measurement system and method for lithium-ion batteries, relating to the field of lithium-ion battery technology. The system includes: a power supply system for powering a power transmission system and an online measurement system, connected in parallel with a charger connected to the battery pack to achieve synchronous charging and impedance measurement; a power transmission system for converting direct current into a step function current, which is superimposed on the DC charging current and injected into the battery pack as an excitation signal; a control system for adjusting the frequency of the step function current using pulse width modulation technology; a measurement circuit module for acquiring the current and voltage signals of the battery pack; and a data analysis module for processing the time-domain signal using wavelet transform to calculate the electrochemical impedance spectrum. This application achieves low-cost, portable online measurement, enabling monitoring of the battery impedance spectrum during charging and providing support for safety early warning.

A waved-powered UUV. The wave-powered UUV may comprise a nose and body. The nose may comprise a nose buttress plate and guide shaft. The body may comprise a body buttress plate having first and second clearance openings; linear-to-rotary power converter (LRPC) having a splined shaft attached to the nose buttress plate and longitudinally disposed through the first clearance opening; AC generator operably coupled to the LRPC; AC-DC converter electrically coupled to the AC generator; battery module electrically coupled to the AC-DC converter; DC motor electrically coupled to the battery module; propeller operably coupled to the DC motor; and guide shaft tube attached to the second clearance opening for receiving the guide shaft. The nose and body may be in a sliding relationship, and the wave-powered UUV may recharge its battery module when subject to wave energy by moving the nose relative to the body in a reciprocal linear motion.

This invention discloses an active damping control method for bipolar DC distribution systems based on modulus decomposition. It incorporates line coupling into the system's stability criteria and active damping parameter design, deriving the pole-mode transformation matrix of the metal-return bipolar DC distribution system and obtaining a decoupling model of the bipolar DC line in the modulus component space. The modulus models of the source-side converter and load are also derived. Based on the established decoupling model of the bipolar DC distribution system in the modulus component space, an active damping control method based on modulus decomposition is proposed. This invention considers the impact of DC distribution lines on stability, incorporating line coupling into the system's stability criteria and active damping parameter design. The modulus damping control scheme proposed in this invention can more effectively suppress instability caused by the negative impedance characteristics of constant power loads and also provides a basis for parameter adjustment.

The utility model discloses a new energy automobile copper clad aluminum braided shield high voltage cable in the technical field of high voltage cable, including stranded copper conductor, the fixed extrusion of insulating layer has on the outer wall of stranded copper conductor, the insulating layer is cross -linked polyethylene or cross -linked polyolefin insulating layer, the insulating layer outside fixedly set semiconductive inner layer, fill in the PP filling strip between semiconductive inner layer with insulating layer, the outer wall of semiconductive layer extrudes and has copper clad aluminum braided shield layer, copper clad aluminum braided shield layer is 0.1~0.2 tinned copper clad aluminum wire, and with semiconductive inner layer is 360 degree ring pressure contact, the outer wall of copper clad aluminum braided shield layer fixed extrusion has aluminum foil layer, the outer wall of aluminum foil layer fixed extrusion has semiconductive outer layer, the outer wall of semiconductive outer layer fixed extrusion has cross -linked polyolefin sheath, the utility model discloses can reduce the shielding layer direct current resistance, guarantees the continuity of grounding, promotes high -frequency shielding efficiency, strengthens in 100kHz~30MHz frequency band shielding attenuation.

A base disposed in a plasma processing chamber. An electrostatic chuck disposed on an upper portion of the base, the electrostatic chuck including a first part and a second part. A first heater electrode layer group including at least one heater electrode layer disposed in the first part. A second heater electrode layer group including at least one heater electrode layer disposed in the second part. A power source is electrically connected to the first heater electrode layer group and the second heater electrode layer group. A controller configured to periodically and sequentially supply DC current from the power source to heater electrode layers included in the first heater electrode layer group and heater electrode layers included in the second heater electrode layer group.

The application discloses a solar photovoltaic heat composite driving high-efficiency energy-saving heat pump system, and belongs to the technical field of renewable energy utilization and heating ventilation air conditioning. The system comprises a photovoltaic-photothermal integrated heat collecting unit, a composite heat pump circulating unit, a multi-mode energy deployment unit, a direct-current direct-drive compressor unit, a cascade heat storage and energy storage unit, a grid-connected / off-grid switching unit, a user-side multi-working-condition terminal unit, an intelligent collaborative control unit, a night / rainy weather working condition energy supplement unit and an energy efficiency amplification optimization unit. The photovoltaic-photothermal integrated heat collecting unit simultaneously outputs direct-current electricity and low-temperature heat energy, effectively solves the problems of low operation efficiency and poor stability of the existing solar heat pump system in rainy weather and at night, simultaneously realizes multi-working-condition operation of refrigeration, heating, domestic hot water supply and grid-connected power generation, greatly improves the utilization efficiency of solar energy and the operation flexibility of the system, and has remarkable energy-saving effect and wide application prospect.

The utility model discloses a brake device, system and continuous casting machine variable frequency brake system of frequency converter relates to frequency converter brake field, and the first end of processor is connected with the first end of contactor's auxiliary contact, and the second end of processor is connected with the first end of relay's coil, the second end of contactor's auxiliary contact is accessed first power voltage, and the coil of relay is used for when the high level of processor output, and the coil of relay is used for after the power of the coil of relay, and the auxiliary contact of relay is used for after the power of the coil of relay, and the coil of contactor is used for after the power of the coil of contactor, and the main contact of contactor is used for after the power of the coil of contactor, and the brake resistance is used for after the main contact of contactor closes, and the feedback electric energy of the direct current side of frequency converter is consumed. The application can be in transmission roll way deceleration or the brake resistance of parking fast investment through the collaborative control of processor, relay and contactor, and the feedback electric energy of the direct current side of frequency converter is effectively consumed, and the overvoltage damage frequency converter is prevented.

A water-bearing electrical apparatus having a water absorption element and an electrochemical cell which has a cathode arranged in a cathode space and an anode arranged in an anode space, which are spatially separated, wherein the electrochemical cell is designed to generate an alkaline partial solution in the cathode space and an acidic partial solution in the anode space when it contains a conductivity transmitter-containing medium and the DC voltage is applied to the anode and the cathode, and to heat a fluid located in the cathode and anode spaces when the AC voltage is applied to the anode and the cathode. A method includes generating an alkaline partial solution in the cathode space and an acidic partial solution in the anode space while applying DC voltage, applying AC voltage to heat fluid in the electrochemical cell, and conveying the alkaline partial solution into the water absorption element.

This invention relates to the field of energy storage technology for new energy power plants, and discloses a multi-compartment coordinated charging and discharging intelligent control device for a new energy power plant energy storage system. The device includes a container body, multiple battery clusters and a DC power control cabinet installed on its inner wall. The energy storage EMS energy management system host sends control commands to drive the drive module to synchronously energize electromagnetic coil one and electromagnetic coil two to generate a directional magnetic field. Electromagnetic coil one, in conjunction with a magnetically conductive shell, magnetizes the iron core. The iron core magnetically attracts the I-shaped armature to compress the spring one, which slides downward along the inner wall of the connecting cavity and pulls the telescopic partition to divide the upper part of the connecting cavity into independent positive and negative magnetorheological chambers that are not connected. The magnetorheological fluid in the liquid chamber flows into the corresponding chamber and, under the action of the magnetic field of electromagnetic coil two, transforms from a liquid state into a rigid solid-like state and forms a dense conductive chain, thereby forming a conductive path to ensure that the battery clusters can be independently switched on and off and coordinated across multiple compartments.

A method comprises discharging electrical energy from an intermediate circuit comprised in the apparatus, measuring a direct current voltage, and inputting measured values to a parameter estimator for the intermediate circuit. The parameter estimator comprises at least a first parameter and a second parameter whose values are determined based on an equivalent capacitance value of the intermediate circuit, an equivalent resistance value of the intermediate circuit and an electrical load power value of the intermediate circuit, the parameter estimator outputting values for time constant and values for power-to-capacitance ratio of the intermediate circuit. The method further comprises storing values at least temporarily for condition monitoring.

This application discloses a power system, a power converter, and a component control device. The power system includes a power converter and a DC string. The power converter includes a DC terminal, a main power circuit, a first auxiliary power circuit, and an AC terminal. The DC string includes at least one component control device. The output terminals of each component control device in the DC string are connected in series to the DC terminal. The component control device includes a second auxiliary power circuit, which includes a first input side. The power converter, in response to a start-up signal from at least one component control device, controls the first output side of the first auxiliary power circuit to output a specified DC power. The component control device, in response to receiving the specified DC power at the first input side of the second auxiliary power circuit and the input voltage at the first input side being greater than the minimum start-up voltage of the component control device, performs a start-up action. Therefore, the component control device can operate normally under poor lighting conditions.

The application discloses a multi-compatibility intelligent USB power supply imitation dry battery power conversion device, which comprises a USB power supply input module for connecting with 5V power supply voltage of an external USB power supply; an intelligent voltage conversion and management module electrically connected with the USB power supply input module and used for converting the 5V power supply voltage into 3V direct current output voltage; a battery electrode output module electrically connected with an output end of the intelligent voltage conversion and management module and used for conducting the 3V direct current output voltage to a battery compartment of an external power consumption equipment; and a working state indication module electrically connected with the intelligent voltage conversion and management module and used for directly displaying the working state of the current device to a user, including a power-on state and a fault protection state. The application adopts a synchronous rectification step-down type DC-DC chip to cooperate with current detection and an electronic switch, realizes accurate and stable voltage conversion from 5V to 3V, has an automatic sleep function under no load, and solves the problems of unstable direct power supply voltage and excessively high power consumption of the USB power supply.

1. The name of the design product: DC lighting junction box. 2. The use of the design product: device for line connection, distribution and protection in DC lighting circuit system. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

A system includes a first circuit, a converter circuit and a testing system. The first circuit is configured to generate a radio frequency (RF) signal, the RF signal having a first oscillation frequency. The converter circuit is coupled to the first circuit, configured to receive the RF signal, and to convert the RF signal into a first voltage representative of a value of the first oscillation frequency. The first voltage is a direct current voltage. The testing system is coupled to the converter circuit, and configured to receive the first voltage, and to perform a wafer acceptance test (WAT) on the first oscillation frequency in response to the first voltage.

In the RF-DC circuit of a wireless power receiving device, the device connected to the power supply voltage terminal is not protected. [Solution] In an RF-DC circuit of a wireless power receiving device, the RF-DC circuit comprises a capacitor provided between the positive terminal of the antenna and the power supply voltage terminal, and a diode connected in parallel with the capacitor and capable of outputting an overvoltage input from the positive terminal of the antenna to the GND output, wherein the RF-DC circuit is not connected to an overvoltage protection element between the positive terminal of the antenna and the capacitor.

The application relates to the technical field of power system fault diagnosis, and discloses a flexible DC power distribution network fault diagnosis method and system. The method comprises the following steps: collecting a fault current time sequence signal of a DC side of a flexible DC power distribution network and inputting the fault current time sequence signal into a pre-trained fault diagnosis model; using an interpretable complex time-frequency convolution layer to perform adaptive time-frequency feature extraction on the fault current time sequence signal, obtaining a time-frequency-amplitude tensor, constructing a time-amplitude trajectory, a time-frequency trajectory and a frequency-amplitude trajectory, and respectively performing Gram difference angle field coding on the trajectories to generate a three-channel time-frequency feature matrix; inputting the three-channel time-frequency feature matrix into a parallel double-branch feature extraction module to extract global features and local features; adaptively fusing the extracted global features and local features, classifying the fused features, and outputting a diagnosis result of a fault category. The application improves the accuracy of flexible DC power distribution network fault diagnosis.

This invention discloses a load testing mechanism for DC charging piles, relating to charging pile load testing technology. It includes a testing body and an operation panel on the front of the testing body, with a heat dissipation panel on the back. The testing body has insertion mechanisms on both its internal left and right sides, each including an insertion slot. A pull-out ring is provided on the outer side of the insertion slot. Support mechanisms are provided on both the external left and right sides of the testing body, each including a support arc plate. This load testing mechanism for DC charging piles connects to the charging gun of the charging pile via the testing body. The rotatable support arc plate inside the support side plate supports the charging gun. During load testing, the high temperature is de-energized by an electromagnetic ring, causing the charging gun to disengage from the insertion slot, thus preventing short-circuit damage to components due to high temperature.

This invention relates to a graphene spin device, its construction method, and a method for measuring nonlocal signals. The construction method of the graphene spin device includes the step of setting electrodes on the graphene surface; wherein, the electrodes are set by magnetron sputtering, using a direct current, and the magnetron sputtering power is 200±10W. This invention creates defects at the contact point between the graphene and the electrodes through magnetron sputtering under specific conditions, forming serrated graphene edges. Then, it utilizes the unique magnetism of graphene to construct a spin device. This spin device has high spin polarization and long spin transport distance. More importantly, this spin device relies solely on the magnetism of the graphene itself for spin injection and spin detection, providing a new approach for the development of graphene spin devices. It can be used for nonlocal measurements at room temperature, has low requirements for experimental environmental conditions, and is beneficial for exploring some nontrivial electrical mechanisms.

The utility model relates to water electrolysis technical field, specifically disclose a kind of low-temperature full gaseous water vapor electrolytic hydrogen production device and system. The utility model aims at overcoming the limitations of existing water electrolysis technology in energy efficiency, cost, system complexity, operation flexibility and environmental adaptability etc. The utility model is core at, under the mild condition lower than 90 DEG C, water is supplied to cathode and anode of electrolytic cell in the form of pure gaseous water vapor simultaneously, using specially designed membrane electrode assembly and internal water management structure, under the action of direct current, water vapor is decomposed efficiently to generate high-purity hydrogen and oxygen. The entire electrolysis process avoids the direct input and circulation of liquid water, realizes gas-solid two-phase interface reaction, significantly simplifies water balance system, reduces equipment volume and weight, solves the bubble coverage of traditional liquid phase electrolysis, mass transfer resistance. The utility model device has the characteristics of modularization and miniaturization, and significantly reduces the net power consumption per unit hydrogen production.

1. The name of the design product: DC charging pile (floor type 300-480kW). 2. The use of the design product: provide fast charging service for electric vehicles. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: front view.

1. Name of the product in this design: Insulation Resistance Tester. 2. Purpose of this design: For measuring AC voltage, DC voltage, resistance, continuity, etc. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

A variable frequency drive (VFD) includes a rectifier, a filter, an inverter, a capacitor bank, and a control circuit. The rectifier converts AC power from a power supply into DC power on a DC bus, which is then filtered. The inverter converts the DC power into three-phase AC power for output to the electric motor. The capacitor bank has one or more capacitors connected to the DC bus. This capacitor bank can store regenerative energy on the inverter's DC bus and supply the stored DC power to the DC bus for conversion back to three-phase AC power to drive the electric motor. The control circuit pre-charges the capacitor bank using AC power from the power supply. The control circuit monitors one or more parameters of the VFD and detects one or more fault conditions associated with the monitored parameters.

The present application relates to the technical field of wireless charging, and particularly relates to a safety interlocking system for infrared laser long-distance wireless charging; through cooperation of spatial distribution of multiple photodiodes and hardware structure, when the light path is invaded by foreign matters, the control circuit can quickly cut off the high-power laser output, and the three-dimensional layout eliminates the spatial blind area of single-point detection, the polarization discrimination element in the transmitting end device and the phase delay element in the receiving end device are combined to construct an optical encryption closed loop, only the light received by the sensor after being inversely reflected to the receiving end rotatable polarization state is allowed, the in-phase polarized light reflected by ordinary mirror foreign matters is effectively blocked, the risk of mirror deception reflection attack in the high-power scene is greatly reduced, and through the pure hardware phase-locked loop frequency decoding circuit, only the reflected light output logic level carrying the preset modulation frequency is output, direct current and low-frequency interference of sunlight and illumination light sources are filtered from the physical layer.