2236 results about "Power supply unit" patented technology

The utility model relates to a radio frequency power amplification circuit with a harmonic suppression function and a radio frequency chip. The radio frequency power amplification circuit comprises an input matching unit, a first-stage power amplification unit, a first-stage bias unit, a first-stage power supply unit, an inter-stage matching unit, a second-stage power amplification unit, a second-stage bias unit, a second-stage power supply unit and an output matching unit. According to the utility model, the LC type trap circuits are designed and used in the power supply unit and the inter-stage matching unit, so that secondary, tertiary and high-order harmonic suppression is realized in the radio frequency power amplification circuit; meanwhile, based on LC circuit structures in the power supply unit and the inter-stage matching unit, the inter-stage matching bandwidth is widened, and the linearity of the multi-stage power amplification unit is improved.

The utility model relates to a rear-phase-cut single-live-wire type wall light modulator, which comprises an MOS (Metal Oxide Semiconductor) tube switch loop unit, a singlechip control unit and a direct-current power supply unit, the MOS tube switch loop unit comprises a wiring terminal J2 connected with an MOS tube Q1, a grid electrode of the MOS tube Q1 is connected with four resistors in series in sequence and then is connected with an MOS tube Q2, a drain electrode of the MOS tube Q2 is connected with a diode D2, the diode D2 is connected with a diode D1, a fixed end contact of a single-pole double-throw switch is connected with the MOS tube Q2, and two movable end contacts of the single-pole double-throw switch are connected with the wiring terminal J1 and the wiring terminal J3 respectively; the direct-current power supply unit comprises an alternating-current voltage waveform acquisition circuit, a direct-current voltage drop circuit, an overcurrent protection circuit and a filtering voltage stabilizing circuit; according to the single-chip microcomputer control unit, a linear sliding potentiometer is connected with the PC2 end of a single-chip microcomputer after being connected with a resistor in series, the linear sliding potentiometer and a rotary potentiometer are sequentially connected between the output end of the direct-current power supply unit and the ground in series, a triode Q6 is connected with a triode Q5 and then connected with the collector electrode of a triode Q7, and the base electrode of the triode Q7 is connected with the PA6 end of the single-chip microcomputer after being connected with a resistor in series.

The invention discloses a follow-up PIV boundary layer flow field test system and test method based on electrolytic hydrogen bubbles. The follow-up PIV boundary layer flow field test system comprises an integrated optical measurement module and a tracer particle generation module, the optical measurement module is arranged in the UUV and comprises a laser transmitter assembly, a sapphire prism and two imaging cameras which are symmetrically arranged, and laser sheet light forms a sheet light area on the outer surface of the UUV after being refracted by the sapphire prism; the tracer particle generation module comprises a cathode, an anode and a power supply unit, the cathode is a platinum wire array composed of a plurality of platinum wires arranged in the axial direction of the UUV, and the platinum wires are located at different heights away from the wall face of the UUV; the power supply unit selectively electrifies the platinum wire, independently adjusts the voltage, controls the number and frequency of generated hydrogen bubbles, and achieves the synchronous measurement of flow field information at different thickness positions of a boundary layer. According to the invention, boundary layer flow field in-situ follow-up measurement and synchronous fine measurement of different thickness positions under the condition of not changing the UUV shape are realized, and the device has the advantages of high integration level, small flow field disturbance, high measurement efficiency and the like.

The invention relates to the technical field of software communication, and discloses a software offline downloading method and an offline downloader. The method comprises the following steps: establishing an offline downloading system, wherein the offline downloading system comprises an offline downloader main body and target equipment of to-be-updated firmware; before firmware data transmission is carried out on the offline downloader main body and the target equipment, a user-defined handshake process is executed to confirm that both the offline downloader main body and the target equipment are in a data transmission ready state; and transmitting the firmware file to the target equipment through the communication module, and performing data verification in real time in the transmission process. The rechargeable power supply unit is arranged in the offline downloader main body to break through power supply limitation, the double communication sub-modules are adapted to different scenes, self-defined handshake is matched with verification before transmission to improve reliability, firmware verification and error processing guarantee safety, the whole downloader does not need to depend on a computer and an external power supply, the operation threshold is low, and the practicability is high. And a stable, convenient and safe scheme is provided for firmware updating of the target equipment.

The invention discloses an intelligent memory chip high and low temperature test device and a test tuning method, and relates to the technical field of memory chip testing, the device comprises a test unit used for constructing a cold and hot test environment for a to-be-tested memory chip; the power supply unit is used for providing direct current for each unit; the management unit is used for detecting environment data in real time and uploading the environment data to the data acquisition and analysis server, and regulating and controlling the environment data in a closed-loop manner by combining a test instruction; the excitation generator is used for generating and sending test excitation for the to-be-tested storage chip according to the test instruction, recording test data and feeding back the test data to the data acquisition and analysis server; and the data acquisition and analysis server is used for pre-judging faults of the to-be-tested storage chip based on an AI model according to the real-time environment data and the test data, optimizing test instruction parameters or storage chip FTL algorithm parameters, generating a dynamic regulation and control test instruction and issuing the dynamic regulation and control test instruction. According to the invention, accurate test and optimization of the memory chip in an extreme temperature environment can be realized.

The invention discloses a power supply control system and method for an eVTOL low-voltage distribution box, and relates to the technical field of power supply control, and the system comprises a multi-source double-bus power supply unit, a voltage reduction unit and an output unit. The multi-source double-bus power supply unit comprises a first bus independent power supply channel and a second bus independent power supply channel, the first bus independent power supply channel and the second bus independent power supply channel are isolated based on a contactor, the first bus independent power supply channel comprises x heterogeneous power sources and x ideal diodes, and the x heterogeneous power sources comprise a high-voltage-to-low-voltage DC-DC power source, a ground power source and n lithium battery power sources. The second bus independent power supply channel comprises y paths of heterogeneous power supplies and y ideal diodes, and the y paths of heterogeneous power supplies comprise y paths of lithium battery power supplies; the step-down unit comprises m paths of DC-DC step-down converters; and the output unit comprises m ideal diodes which are connected in parallel with the output end of the DC-DC buck converter. According to the invention, the stability and quality of power supply are ensured, and airborne equipment is ensured to work in a stable voltage and current environment.

The utility model relates to an electrical system for a submarine sediment acoustic in-situ measurement device, which belongs to the technical field of submarine measurement electrical control and comprises a shipborne part and an underwater part which are connected through a photoelectric composite cable. The shipborne part is used for controlling the work of the underwater part; wherein the underwater part comprises a plurality of modular units which are connected through standardized interfaces, and the modular units comprise a main control unit, an acoustic measurement unit, a power amplifier unit, a transducer unit, a hydrophone unit and a power supply unit. According to the electrical system for the acoustic in-situ measurement device for the submarine sediments, through modular design, the adaptability and universality of the electrical system are improved; and moreover, a worker can add corresponding units or modules according to measurement requirements, so that the expandability of the system is improved, and different measurement scenes and requirements are better met.

Devices, systems, methods, and processes for operating a plurality of power supplies of a network device using cold redundancy are described herein. Traditionally, redundant power supplies are operated in parallel with primary power supplies, thus making power supply system less efficient. To address these issues, an analog architecture is provided for implementing cold redundancy in a network device. Each power supply includes two pins: one for designating the power supply as primary or secondary, and the other pin for configuring an activity state of the power supply. The activity state can be an active state or a sleep state. The secondary power supplies are further ranked in an order of priority using different voltage levels for assignment. In response to surge in load demand, activity states of one or more secondary power supplies are changed to the active state without requiring a signal from a centralized control software.

The invention relates to the technical field of ocean engineering construction monitoring, and discloses an offshore wind power jacket foundation slurry leakage detection device and a slurry leakage detection method. The slurry leakage detection device comprises a main body frame, a multi-mode sensor array, a central processing unit, a communication transmission module and a power supply unit, the central processing unit is configured to receive and process data collected by the multi-mode sensor array, judge whether a slurry leakage event occurs or not through multi-source information fusion analysis, and generate an alarm signal containing slurry leakage position information when slurry leakage is confirmed. According to the invention, in-situ and real-time acquisition, processing and transmission of environmental data of a grouting area can be realized, and the hysteresis problem caused by dependence on indirect signals in the background technology is solved. The device is directly deployed in an area with the highest slurry leakage risk, physical signals at the moment of slurry leakage can be captured, the directness and the real-time performance of detection are improved through multi-source information fusion analysis of the central processing unit, and reliable hardware conditions are provided for subsequent quick response.

Disclosed embodiments provide methods, systems, and computer program products for implementing enhanced phase power load balancing of a set of systems (e.g., the set of systems of a data center) using a subset of the systems. Disclosed embodiments extract phase currents of a three-phase power source of the set of systems, and determine, based on extracted phase currents for the set of systems, input phase power load balancing for the subset of the systems. Disclosed embodiments alter the current input phase power balancing of the subset, unbalancing the input phase power load for the subset of the systems to provide enhanced phase power load balancing of the set of systems. Altering the current input phase power balancing for the subset of the systems can be implemented by power shifting between power supply units (PSUs), phase rotations, or input phase switching of power distribution unit (PDU) switchable output ports.

The utility model discloses an AC / DC hybrid auxiliary power supply module of an energy storage converter, comprising a power supply path switching control unit which is respectively connected with a power supply module and a voltage regulation module. The power supply path switching control unit is connected with at least two of the external UPS power supply unit, the AC power supply unit and the DC power supply unit. The alternating current power supply unit, the direct current power supply unit and the external UPS power supply unit are all provided with voltage detection modules, the design structure is reasonable, through the alternating current power supply unit, the direct current power supply unit and the external UPS power supply unit, various power supply modes can be switched to different power supply units in different voltage states, and the power supply efficiency is improved. And after the voltage regulation module regulates the voltage to a proper voltage, power is supplied to a post-stage circuit, so that the problem that when the input voltage suddenly changes, a control circuit, a detection circuit, a protection circuit and the like lose power supply at present, and large potential safety hazards exist in safe operation of an energy storage system is solved.

To provide a power supply device capable of securing an insulation distance from a terminal of a connector to which an external wiring is electrically connected, and a lighting fixture equipped with the same.SOLUTION: The power supply device 1 includes a connector 2, a power supply unit 3, a circuit board 4, a case 5, and a connector cover 6. The connector 2 has terminals 21 to which external wirings L1 electrically connected to the light sources are detachably attached, and which are electrically connected to the external wirings L1 in a state where the external wirings L1 are attached. The power supply unit 3 supplies power to the light sources via the connector 2 and the external wire L1. The connector cover 6 is attached to the inner peripheral edge 531 of the opening 53 of the case 5 and covers at least the terminals 21.SELECTED DRAWING: Figure 1

There is provided a charge / discharge inspection system that enables easy maintenance such as cleaning the tips of probes or replacing defective probes without a complex configuration. The charge / discharge inspection system includes: a battery inspection unit of a charge / discharge inspection apparatus; a tray that is capable of containing a probe unit, a charge / discharge power supply unit, and a charge / discharge power supply-integrated probe unit in a storage part, is conveyed with one of them contained in the tray, and is placed in the battery inspection unit; and a conveying apparatus that conveys the tray from the battery inspection unit to another location, or conveys the tray from another location to the battery inspection unit.

The invention relates to the technical field of off-grid renewable energy hydrogen production, and discloses an off-grid alkaline hydrogen production system and a power adaptive distribution and safety control method thereof, the off-grid alkaline hydrogen production system comprises a renewable energy power supply unit, a parallel electrolytic cell module, a gas-liquid treatment system and a main controller; in the Faraday hydrogen production mode, the bubble volume is compressed by adjusting the operation pressure so as to modulate the impedance characteristic of the electrolytic cell, and the energy efficiency is improved in cooperation with current control; and in the non-Faraday polarization hot standby mode, the voltage of the rectifier cabinet is controlled to be clamped to a non-gassing polarization interval, and liquid level plugging is constructed in the U-shaped communicating pipeline according to the fluid statics principle. The system is further provided with a transient buffering strategy based on the pneumatic capacity, and pressure attenuation is delayed through the gas dead zone volume when power is suddenly reduced. The problems of hydrogen production efficiency optimization, low-power safe hot standby and mechanical protection under wide power fluctuation are effectively solved.

The present application belongs to the field of rail vehicle technology; provide a kind of rail vehicle emergency evacuation device's working circuit and control method, power supply unit in working circuit provides direct current voltage to vehicle zero speed response unit;Vehicle zero speed response unit responds to vehicle zero speed signal, and outputs direct current voltage to skirt interaction unit and folding ladder extension interaction unit;Skirt interaction unit and folding ladder extension interaction unit output voltage to door enable response unit, door enable response unit combines door enable signal input switch gating one side or two sides, and output voltage signal is given to drive response unit, drive the cylinder solenoid valve work.The control method of emergency evacuation device of the present application is suitable for the working circuit of emergency evacuation device of the present application.The present application provides vehicle zero speed response unit and door enable response unit, and control signal is provided to the driver side, can realize man-machine interaction, ensure that equipment is opened in correct side, guarantee the safety of vehicle, track and driver.

The invention relates to the technical field of power supply, and discloses a humanoid robot modular distributed power supply system which comprises a power supply battery pack, a power management distribution board and a plurality of power utilization modules. The power utilization module at least comprises a control computing power unit, a sensing system, an upper limb joint module, a lower limb joint module and other joint modules; the power management distribution board is electrically connected with the power supply battery pack and each power utilization module. The power management distribution board comprises an MCU control unit, a DCDC power supply unit, a soft start unit, a high-power output unit and a voltage and current detection unit. Through a modular distributed power-on strategy and in combination with soft start pre-charging, voltage and current real-time detection and a regenerative braking absorption unit, voltage and current peaks generated at the moment of power-on of the capacitive high-power load are remarkably suppressed, the risk that a power device is damaged due to overvoltage and overcurrent impact is fundamentally avoided, and the reliability of the power device is improved. And the system reliability and the service life are greatly improved.

Devices, systems, methods, and processes for dynamic power management in network devices are described herein. Power consumption in network devices may fluctuate due to varying load conditions, leading to inefficiency if all power supply units (PSUs) in these network devices remain active all the time. To address this, a network device is provided with a power management logic that dynamically tunes a count of active PSUs in the network device based on a load demand handled by various PSUs in the network device. The power management logic may receive, from the PSUs, one or more load status signals indicating the load demand handled by the PSUs. Based on the one or more load status signals, the power management logic may determine whether to increase or decrease the count of active PSUs. Dynamically adjusting the count of active PSUs may enhance energy efficiency, reduce costs, and promote sustainability.

The invention discloses a power supply fault detection method and electronic equipment, and relates to the technical field of integrated circuits, and the power supply fault detection method realizes fault detection of a power supply unit through the power supply unit, a control unit and a service system which are connected, and comprises the following steps: firstly, updating a timestamp of the power supply unit according to the time of the control unit; and the power supply log information is generated and stored in the power supply unit, so that the problem of inaccurate time of the power supply log information in related technologies can be relieved, and the accuracy of power supply fault detection is improved. And on the other hand, the power supply log information stored in the power supply unit is sent to the control unit through the received log reading instruction of the user, so that the problems of resource occupation and bandwidth occupation of the control unit caused by frequent access of the control unit to the power supply unit in related technologies can be relieved; and the operation efficiency of the control unit is improved.

To provide a drive circuit, a display device and the like which improve power consumption.SOLUTION: The drive circuit is a drive circuit for a display device and includes a power supply unit that supplies power to a light emitting unit including a plurality of light emitting units, a current driver that supplies a pulsed drive current whose duty ratio is adjustable to the plurality of light emitting units, and a control unit that controls a current value and a duty ratio of the drive current supplied by the current driver based on an input gradation value corresponding to the plurality of light emitting units. The control unit sets the current value such that the luminance with respect to the maximum input gradation value of the light-emitting unit becomes relatively small when the lighting rate of the plurality of light-emitting units is larger than a first threshold value, and the luminance with respect to the maximum input gradation value becomes relatively large when the lighting rate is equal to or smaller than the first threshold value, and supplies the set current value in common to the plurality of light-emitting units of the light-emitting unit corresponding to the plurality of areas.SELECTED DRAWING: Figure 1

The invention discloses a thermosensitive color-changing modifying pen and a color fixing device. The device comprises a modifying pen and a portable color fixing device. A main cavity and an auxiliary cavity which are separated by a partition plate are arranged in a penholder of the modifying pen and are respectively filled with thermosensitive covering ink and colorless fixation accelerant, and a fine fiber pen point and a metal needle tube pen point which are communicated with the penholder are arranged at two ends of the penholder. The portable color fixing device comprises a constant-temperature heating piece, a power supply unit and a control circuit, according to the principle that thermosensitive covering ink changes color under heating to be matched with the base color of the blueprint, fine smearing and controllable heat fixation technologies are combined, rapid, traceless and lossless modification of the engineering blueprint is achieved, and the problems that a traditional modification method is obvious in color difference, the blueprint is damaged, and operation is tedious are effectively solved. The device is easy and convenient to operate and firm in modification effect, and subsequent use of drawings is not affected.

A computer power supply unit including a housing, a main board disposed in the housing, at least one high heat producing component disposed on the main board, at least one other heat producing component disposed on the main board, and a heat transfer system is provided. The heat transfer system comprises bottom and top heat transfer devices. Thermal paths are formed between the bottom heat transfer device and a bottom panel of the housing and the top heat transfer device and a top panel of the housing to dissipate heat from an at least one high heat component assembly, formed in part by the at least one high heat producing component, and an at least one other heat component assembly, formed in part by the at least one other heat producing component, to an outside of the bottom panel and an outside of the top panel.

The invention is suitable for the field of power distribution network post-disaster reconstruction, and discloses a power distribution network post-disaster rapid reconstruction method, system and device based on radial constraint and a medium, and the method comprises the steps: obtaining post-disaster power distribution network data, and constructing a post-disaster reconstruction model; based on the post-disaster reconstruction model, establishing an optimization objective function and various constraint conditions; establishing a mixed integer linear programming model based on the optimization objective function and a plurality of constraint conditions, judging whether the set constraint conditions are met by combining a particle swarm optimization algorithm, and solving an optimization problem of the mixed integer linear programming model to obtain a final decision result; and obtaining a switch operation sequence based on the decision result, calculating a recovery result of each power supply unit, and obtaining a reconstruction decision scheme of the post-disaster power distribution network, thereby improving reconstruction calculation efficiency and engineering applicability, and realizing rapid recovery of the key load and stable operation of the post-disaster power distribution network.

The invention belongs to the technical field of superconducting cable operation monitoring, and particularly discloses a superconducting direct-current cable full-load operation testing device and method, and the testing device comprises a functional loop unit, a power supply unit and a measurement and control unit. The functional loop unit comprises a direct current loop and a high potential generation loop; the direct-current loop comprises a direct-current power supply, and the direct-current power supply is arranged in the electromagnetic shielding structure and used for applying test current to the superconducting direct-current cable; the high-potential generation loop is used for applying test voltage to the superconducting direct-current cable; the power supply unit is used for providing isolated power supply for the direct current loop and the high potential generation loop; and the measurement and control unit is used for regulating and controlling the functional loop unit, monitoring the state of the functional loop unit and regulating and controlling the output current of the direct current loop and the output voltage of the high potential generation loop. The test cost and the implementation difficulty can be reduced, and the full-load working condition simulation accuracy and the test safety are improved.

This application provides a train power supply system, a train control method, and a rail transit control system. The train has multiple carriages equipped with electrical systems. The train power supply system includes multiple power supply units. Each power supply unit is located on a corresponding carriage and supplies power to the electrical system of that carriage. Each power supply unit also has a power supply circuit connecting it to the electrical systems of other carriages. By increasing the power supply circuits between each carriage's power supply unit and the electrical systems of other carriages, when a power supply unit in one carriage experiences a temperature abnormality fault, power can be supplied to the electrical system of that carriage through the power supply units of other carriages, ensuring that carriages with faulty power supply units can still operate normally.

The application discloses a self-interference cancellation device in a full duplex system, which is an independently deployable hardware module connected between a radio frequency transceiver and an antenna, and comprises a switch matrix and a phase shift network unit, a control signal unit, an interface unit and a power supply unit. The switch matrix and the phase shift network unit comprise a radio frequency switch matrix and an inverter composed of a balun transformer; the control signal unit comprises a microcontroller. The microcontroller is configured to output a periodic control signal to synchronously control the radio frequency switch matrix to alternately switch the connection between the two antennas and the transmitting and receiving ports in the first half cycle and the second half cycle in a control period, and synchronously control the phase shift network to introduce a 180-degree fixed phase shift in the second half cycle. Through the above operation, the self-interference signal spectrum is moved away from the baseband, and then low-pass filtering is performed on the latter stage to realize endogenous elimination. The application does not need channel estimation, has simple hardware architecture, low cost and good compatibility, and is convenient for full duplex upgrading of existing equipment.

The application discloses a kind of high-efficiency adaptive dynamic wireless power supply systems for wheel hub motor, battery is connected adaptive coupling transmission unit by vehicle-mounted power supply unit, the adaptive coupling transmission unit includes transmitting end and receiving end, the transmitting end dynamically adjusts output impedance according to control instruction, to match the load and coupling state of receiving end variation, the receiving end converts and outputs electric energy to wheel hub motor.The application completely cancels the physical high-voltage cable connection from the vehicle body to the rotating wheel, helps to improve the safety performance of vehicle, and improves the dynamic transmission performance and stability, can ensure the long-term reliable operation of power electronic elements in harsh environment, realizes prospective power regulation, avoids unnecessary energy waste, so as to improve the cruising range of whole vehicle.

Method and apparatus for system power supply. A power demand of a system having a first power supply unit (PSU) and a second power supply unit (PSU) is monitored. An efficiency profile of the first PSU is accessed. An efficiency profile of the second PSU is accessed. A load split between the first and second PSUs is generated based on the efficiency profiles of the first and second PSUs and the power demand to increase a power efficiency of the system.

The invention discloses a visualized regional spare power automatic switching debugging device, system and method, and relates to the technical field of electrical equipment. The device comprises a man-machine interaction unit used for sending a test instruction; the main control and logic management unit is used for receiving the test instruction, analyzing the test instruction into a test sequence, sending simulated power grid fault information to the tested spare power automatic switching equipment and collecting the equipment action condition of the tested spare power automatic switching equipment; the analog signal generation unit is used for receiving the test sequence and generating a control signal required by the work of the tested spare power automatic switching equipment based on the test sequence; and the multi-stage isolation and accurate power supply unit is used for providing current and / or voltage signals required by the work of the tested spare power automatic switching equipment for the tested spare power automatic switching equipment under the control of the control signal. According to the invention, high-performance calculation, professional industrial control and reliable communication are integrated, and automation and visualization of regional spare power automatic switching debugging are also realized.

A substrate processing device comprises a process chamber which forms an internal space; a substrate support disposed inside the process chamber and configured to support a substrate; a first electrode configured to generate a plasma in the internal space; an electromagnet configured to generate a magnetic field in the internal space to control a distribution of the plasma; and a DC power supply unit configured to supply a first DC pulse signal to the electromagnet. The first DC pulse signal is repeated at a first period to include a plurality of cycles, each cycle including a first section and a second section subsequent to the first section, the first DC pulse signal has a first level during the first section, a second level different from the first level during the second section, and the first and second sections each have a duration of 0.1 to 10 seconds.