534 results about "Alternating 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.

A high-frequency power supply device includes a first power supply that outputs a high-frequency AC voltage having a first frequency, a second power supply that outputs a DC pulse voltage including one or more continuous pulse waveforms, a matching box that receives the high-frequency AC voltage, performs impedance matching such that impedance viewed from the first power supply becomes constant, and outputs the high-frequency AC voltage, a filter that receives the DC pulse voltage, filters the DC pulse voltage, and outputs the DC pulse voltage to a pulse-power input terminal of a load, and an IMD suppression circuit that includes a first inductor having predetermined inductance provided between the matching box and an AC-power input terminal of the load, receives the high-frequency AC voltage, allows the input high-frequency AC voltage to pass through the first inductor, and outputs the high-frequency AC voltage to the AC-power input terminal of the load.

The application discloses a large-flux magnetic positioning sensor and relates to the technical field of magnetic positioning sensors.The large-flux magnetic positioning sensor comprises a magnetic core and electronic wires wound on the magnetic core; the magnetic core adopts a large-diameter metal magnetic core wire treated by a key heat treatment process; and the metal magnetic core wire is provided with a magnetic core wire plating layer on the surface. The application improves the amplitude of the output alternating voltage signal of the magnetic positioning sensor, increases the magnetic flux passing through the magnetic positioning sensor, namely, increases the inductance value, thereby improving the positioning precision of the magnetic positioning sensor, meeting the requirements of small size and low power consumption of the magnetic positioning sensor, and having the characteristics of wide frequency and strong magnetic field resistance.

1. The name of the design product: AC energy storage outdoor cabinet. 2. The use of the design product: used as an outdoor AC cabinet energy storage system container. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

This invention provides a switching power supply, an AC-DC circuit, an input voltage detection circuit, and a method. The first end of the secondary coil of a transformer is connected to the anode of a rectifier diode, and the cathode of the rectifier diode is connected to the positive terminal of a filter capacitor. The second end of the secondary coil of the transformer, the negative terminal of the filter capacitor, and the positive terminal of the sampling capacitor are all grounded. The cathode of the diode is connected to the first end of the secondary coil of the transformer, and the anode is connected to the negative terminal of the sampling capacitor. The negative terminal of the sampling capacitor is grounded sequentially through a third sampling resistor and a second sampling resistor. The common terminal of the third and second sampling resistors is connected to a voltage detection terminal and, through a first sampling resistor, to a reference voltage input terminal. A reference voltage is input to the reference voltage input terminal. The control unit detects the voltage at the voltage detection terminal and calculates the magnitude of the input AC voltage based on the relationship between the AC voltage and the voltage at the voltage detection terminal.

The present specification relates to the technical field of power electronics, and particularly relates to a multi-element heterogeneous hydrogen production power supply and a control method. The power supply comprises a main branch and an auxiliary branch. The main branch comprises a first rectifier circuit and a Buck converter. An input end of the first rectifier circuit is connected with a first output winding of a transformer, an output end of the first rectifier circuit is connected with an input end of the Buck converter, and an output end of the Buck converter is connected with a first end of a DC bus. The main branch is used for providing steady-state power. The first rectifier circuit is an uncontrolled rectifier circuit. The auxiliary branch comprises a second rectifier circuit and a full-bridge circuit. An input end of the second rectifier circuit is connected with a second output winding of the transformer, an output end of the second rectifier circuit is connected with an input end of the full-bridge circuit, and an output end of the full-bridge circuit is connected with the first end of the DC bus. The auxiliary branch is used for transmitting fluctuating power or AC excitation. The embodiments of the present specification can balance between steady-state high efficiency and dynamic fast response.

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.

A partially or fully electrothermal heater (1) is disclosed, the heater being arranged to heat a fluid in a first circuit, the fluid comprising heated fluid or tap water. The heater includes a first electric heating element (8) arranged to heat the fluid in the first circuit. The first electric heating element is arranged to be powered by an AC power supply (22) and a DC power supply (20). The heater includes a controller (24) arranged to control the power distribution from the DC power supply and the AC power supply to the first heating element.

1. The name of the design product: micro inverter (S3). 2. The use of the design product: grid-connected inverter with intelligent networking and monitoring system, converting DC power of solar panels into AC power. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

A device for charging at least one first electric battery (80) for an aircraft is proposed. The charging device is configured to be installed on board the aircraft and comprises a first DC power supply bus (14) intended to supply power to a first electric propulsion unit (15) and to be connected to the first battery, and a first AC / DC power converter (12) connected to the first bus. The charging device further comprises a ground power socket (13) connected to the first AC / DC power converter to deliver an AC voltage to the first converter, and a first main contactor (11) connected to the ground power socket and to the first AC / DC power converter, the first main contactor being configured to disconnect a first electrical connection interface of a turbogenerator (27) of the aircraft from the ground power socket and from the first AC / DC power converter.

A system for an electric vehicle includes a power switch configured to convert DC power from a battery to AC power to drive a motor, and a three-dimensionally printed heat sink (3D heat sink) coupled to the power switch.

Provided is a high-frequency power supply device and an output control method thereof, capable of reducing ripple when converting input from a three-phase AC power supply to DC and capable of performing output control in a high-frequency band. A high-frequency power supply device includes an AC-DC converter that converts input from a three-phase AC power supply to DC and a high-frequency amplifier that includes a plurality of FET elements and outputs high-frequency AC power, wherein the output of the AC-DC converter is directly input to the high-frequency amplifier, and the high-frequency power supply device further includes a phase conversion circuit that provides a phase difference that cancels out fluctuation components included in DC to gate signals input to the plurality of FET elements. The input from the three-phase AC power supply is converted to DC and directly input to the high-frequency amplifier, and switching is performed by imparting a phase difference that cancels out fluctuation components included in DC to gate signals input to the plurality of FET elements, thereby generating high-frequency AC power.

This application provides an energy storage system, a control method for the energy storage system, an electronic device, a medium, and a product. The energy storage system includes: a battery module, a first charge / discharge control module, a control switch, a second charge / discharge control module, a busbar, and a control module. The first charge / discharge control module converts AC power from the grid into DC power, which is then input to the battery module. The battery module is connected to the busbar via a corresponding control switch. The second charge / discharge control module is connected to the grid and the busbar. The control module is electrically connected to the control switch and communicatively connected to both the first and second charge / discharge control modules. When the first charge / discharge control module malfunctions, it controls the target control switch to close, thereby controlling the second charge / discharge control module to start operating and input DC power to the target battery module. Based on the energy storage system provided in this application, the stability and reliability of the system can be improved.

The application discloses an environment-friendly pulse ash removal control system with a self-diagnosis function and a control method thereof. The system comprises a main control module, a main output circuit and an overcurrent detection circuit. The driving input end of the main output circuit is connected with the main control module. The first output end of the main output circuit is connected with the live wire of an alternating current power supply. The second output end of the main output circuit is connected with a load. The main control module is connected with the load through an output stage thyristor. The load is connected with the output stage thyristor in a one-to-one correspondence. The main output circuit is connected with the overcurrent detection circuit through each load and the corresponding output stage thyristor. The signal output end of the overcurrent detection circuit is connected with the main control module. The overcurrent detection circuit is used for collecting the working current of the load in real time and converting the working current into a current sampling signal. The current sampling signal is compared with a preset overcurrent threshold value, and an overcurrent detection signal is output to the main control module. The system realizes fault detection on the output point, executes a protection action in time, has high inspection efficiency and discovers faults in time.

The power conversion device (100) includes: a power conversion unit (1) having multiple switching elements, which converts DC power into AC power and supplies it to a load in accordance with the on / off state of each switching element; a voltage output calculation unit (11) which calculates the AC voltage output value supplied from the power conversion unit (1) based on the on / off state; an integral value calculation unit (12) which integrates the AC voltage command value and the AC voltage output value calculated by the voltage output calculation unit (11) to obtain the voltage command integral value and the voltage output integral value; and an on / off determination unit (13) which calculates and outputs the on / off state of the power conversion unit (1) based on the voltage command integral value, the voltage output integral value and the set value of the allowable range, before the voltage output integral value reaches the boundary value of the allowable range after the set value of the allowable range is set for the voltage command integral value, or before the voltage output integral value reaches the boundary value of the allowable range.

This article is a power supply enclosure that constitutes the exterior of a power supply unit that converts input AC power into DC power and supplies the converted DC power to an actuator. A power supply unit comprising this article can supply DC power to an actuator installed downstream, and also supply control signals from an upstream controller to an actuator installed downstream, by connecting multiple power supply units as shown in the schematic diagram illustrating the operating state.

We provide a power supply module that is easy to handle and can be implemented at a low cost. [Solution] The power module 1 mounted on a vehicle includes an AC / DC converter 11 that converts one of AC voltage and DC voltage to the other and outputs it, and a voltage converter 20 that converts a first voltage value of an input DC voltage to a DC voltage of a second voltage value. The voltage converter 20 includes a first converter 21 connected to the AC / DC converter 11 and a second converter 23 connected to the first converter 21 via a transformer 22. The power module 1 includes a first circuit board 81 on which the AC / DC converter 11 and the first converter 21 are provided, and a second circuit board 82 which is different from the first circuit board 81 and on which the second converter 23 is provided.

This application discloses an energy storage converter and energy storage system, belonging to the field of power electronics technology. The energy storage converter includes: a DC bus; at least one isolated switching power supply circuit, the input terminal of which is electrically connected to the energy storage element, and the output terminal of which is electrically connected to the DC bus; and an inverter unit, the DC side of which is electrically connected to the DC bus, and the AC side of which is electrically connected to the power grid. The inverter unit is configured to convert the DC power transmitted from the DC bus into AC power. When the isolated switching power supply circuit is placed between the energy storage element and the DC bus, high- and low-voltage isolation between the energy storage element and the DC bus can be achieved. Using an isolated switching power supply circuit allows for electrical isolation between high and low voltages while achieving DC-DC conversion, improving the safety of the energy storage converter. Furthermore, only one stage of isolated switching power supply circuit is needed to achieve electrical isolation, resulting in lower cost.

The application provides an antenna assembly, an antenna and a communication device, and relates to the technical field of communication, to solve the problem of poor electrostatic discharge capability in a radiator. The antenna assembly provided by the application comprises a floor, a radiator and a grounding network, the radiator is used for radiating or receiving electromagnetic waves, the grounding network comprises a grounding end and a connecting end, the grounding end is connected with the floor, and the connecting end is connected with the radiator; the grounding network further comprises a resistive line and an inductive structure, and the resistive line and the inductive structure are connected between the grounding end and the connecting end. In the antenna assembly provided by the application, the resistive line has a relatively high characteristic impedance, thus, the working frequency or bandwidth and other performances of the radiator are not obviously affected, the inductive structure can conduct direct current and block alternating current, thus, the static electricity in the radiator can be discharged to the floor through the grounding network, and the grounding network can obviously block high-frequency radio frequency signals, so that the working performance of the antenna assembly is ensured.

The present invention provides a distributed power generation system, a control method for the distributed power generation system, and an output control device that can more appropriately reduce the amount of electricity purchased from the power grid and more effectively utilize the generated electricity. [Solution] A distributed power system is provided, comprising: a distributed power source; a power converter that converts the power supplied from the distributed power source into AC power corresponding to the load and supplies the converted AC power to the load; an output control device that controls the operation of power conversion by the power converter; and a power generation forecasting device that stores a power generation forecasting model that enables the prediction of the amount of power generated by the distributed power source based on weather forecasts at the locations where the distributed power source is installed, predicts the amount of power generated by the distributed power source after a predetermined time based on the weather forecasting data and the power generation forecasting model, and outputs power generation forecasting information including the predicted value of the amount of power generated, thereby enabling the planning of the demand power required by the load in advance.

A method of operating a power converter for exchanging power with an alternating current (AC) grid includes: commanding one or more switches to selectively conduct a current between a DC storage device and the AC grid via a series combination of a resistor and an inductor; measuring a current through the series combination of the resistor and the inductor; and determining, based on the measured current, an estimated grid voltage of the AC grid. The one or more switches are commanded based on the estimated grid voltage. The power converter is operated in each of: a pre-synchronous mode before energy is exchanged between the DC storage device and the AC grid, and a post-synchronous mode while energy is exchanged between the DC storage device and the AC grid. Different techniques are used to determine the estimated grid voltage in the pre-synchronous mode and in the post-synchronous mode.

A storage and charging integrated apparatus includes an energy storage module and a charging module. A first input terminal of the charging module is connected to a first output terminal of an AC-DC conversion module, a first terminal of the energy storage module is connected to a second output terminal of the AC-DC conversion module, a second terminal of the energy storage module is connected to a second input terminal of the charging module, and an input terminal of the AC-DC conversion module is connected to an AC power grid. The charging module is configured to perform charging output based on a first charging power and a second charging power connected in series, and provide a third charging power output by the charging module for a to-be-charged device; where the first charging power is provided based on a working state of the AC-DC conversion module.

Suppressing noise caused by motor switching. [Solution] A vacuum pump comprising a rotating body, a motor that rotates the rotating body, a radial electromagnet that generates a radial electromagnetic force on the rotating body, a displacement sensor having multiple sensor poles made of coils and measuring the displacement of the rotating body based on changes in the inductance of the coils, a power converter that converts an input DC voltage into an AC voltage to be applied to the motor, a motor driver that performs PWM control in cooperation with the power converter, an oscillator that outputs an AC voltage as a modulated input signal to the displacement sensor, and a demodulation circuit that demodulates the output signal from the displacement sensor using a synchronous detection method, wherein the carrier frequency in PWM control is four times the modulation frequency of the displacement sensor.

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.

This utility model discloses an industrial processing fluid filtration system using the coagulation and diversion principle, comprising a three-compartment water tank, a low-voltage AC particle coagulation device, and a diversion filter cartridge. The three-compartment water tank is divided into a sludge tank, a filtration tank, and a supply tank. The low-voltage AC particle coagulation device includes a cylindrical electrode and an electrical control box. The diversion filter cartridge includes a cylindrical filter, and the interior of the cylindrical filter has a filter element parallel to the axis of the cylindrical filter. The three-compartment water tank, the low-voltage AC particle coagulation device, and the diversion filter cartridge are connected sequentially by water pipes. This industrial processing fluid filtration system using the coagulation and diversion principle is advanced in design, compact in structure, and easy to use. It aggregates fine particles in the processing fluid into larger particles, facilitating subsequent filtration, improving filtration efficiency and accuracy, and preventing excessive deposition and compaction of particles on the filter element surface, thus extending the service life of the filter element and avoiding frequent replacement.

1. The name of the design product: energy storage inverter integrated machine (FA1). 2. The use of the design product: a comprehensive device integrating photovoltaic power generation, energy storage and inverter functions. For converting solar energy into electrical energy, and storing excess electrical energy in a battery for use when needed, also with inverter function, converting DC into AC, supplying household or industrial equipment for use. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

This invention provides a grid-connected energy storage system and a stable operation control method for offshore wind power off-grid operation. The system consists of multiple offshore wind turbines connected in parallel. Each turbine is connected to an AC collection submarine cable via a turbine-side DC / DC converter, a grid-side AC / DC converter, and then connected to the turbine-side AC bus via a grid-side transformer. The turbine-side AC bus transmits power to the AC grid through a flexible DC-DC transmission system, and also connects to an energy storage battery via a grid-connected energy storage converter. The flexible DC-DC transmission system includes an AC grid-side transformer, a turbine-side MMC converter station, an onshore MMC converter station, and a grid-side transformer. This invention combines an offshore wind power off-grid operation system with an energy storage system, utilizing the margin of the energy storage system to achieve grid-connected / off-grid switching for the offshore wind power system. The energy storage system smooths out power fluctuations caused by wind energy fluctuations, enabling off-grid operation of the system.

The application provides a MOSFET-based conversion topology and an AC power commutation control method, wherein the conversion topology comprises at least four commutation modules connected to the positive and negative poles of the X phase and Y phase of the AC power respectively, the commutation module comprises at least two MOSFETs, one end of a MOSFET is connected to the AC power, the other end of the MOSFET is connected to one end of another MOSFET, the other end of the other MOSFET is an output, and the two MOSFETs are turned on and turned off simultaneously. The conversion topology uses MOSFET devices to perform commutation control on medium-high frequency voltage signals, can realize switching of voltage signals among multiple paths, and has small semiconductor device package, low cost and wide selection range.

The application discloses a direct-current networking wind generator system and a control method thereof, adopts decentralized and decentralized power generation control, and comprises a wind generator set, a generator controller, an energy storage battery system and a PCS converter; the wind generator set adopts a doubly salient direct-current excitation generator assembly; the generator controller can convert three-phase alternating current output by the doubly salient direct-current excitation generator assembly into high-voltage direct-current shaft voltage through a full-bridge diode rectification filter circuit, and an additional machine end inverter is not needed; each generator controller is connected with one wind generator set, and a plurality of generator controllers are connected in parallel through a direct-current bus. The direct-current voltage output by the doubly salient direct-current excitation generator assembly can automatically follow the common direct-current bus voltage and keep dynamic stability, and will not fluctuate with the dynamic change of the wind turbine speed; the current backflow phenomenon and the crosstalk problem can be effectively avoided, and the wind turbine industry multi-machine direct-current networking demand is perfectly met.