296 results about "Power filter" patented technology

The invention relates to the technical field of filters, in particular to an internal shielding component of a power filter, which comprises a shell, a cover plate is mounted at the top of the shell through a cross recessed countersunk head screw, and a metal partition plate is arranged on one side of the inner wall of the shell; the wave-proof sleeve is welded on one side wall of the shell, and the material of the wave-proof sleeve is light nickel-plated copper fabric; when the power supply filter is used, the problem that crosstalk coupling is formed between interference signals can be prevented, the electromagnetic compatibility in the signal transmission process between systems is solved, the anti-wave sleeve is adopted for shielding power supply input of the power supply filter, interference of an input cable on other signals is greatly restrained, and the service life of the power supply filter is prolonged. The electromagnetic compatibility problem of the whole system caused by the fact that high-frequency noise is coupled to a power line is prevented, the shielding effectiveness is improved, the problem of filtering post-stage electromagnetic interference signals is greatly restrained, meanwhile, the heat dissipation area is increased, and the heat dissipation efficiency and effect are improved.

The invention relates to the technical field of power filters, and discloses a fault-tolerant control method, system, equipment, medium and product for an active power filter, and the method comprises the steps: building an observer of a fault sensor through the type of the fault sensor after the type of the fault sensor of the active power filter is determined, and outputting an observation value through the observer; and fault-tolerant control is carried out on the fault sensor through the observed value, so that the fault-tolerant control is carried out on the power grid voltage sensor, the inverter output current sensor and the direct current side voltage sensor without changing a modulation strategy, and the accuracy of fault-tolerant control of the active power filter is improved; and stable operation and reliability of the system of the active power filter are ensured.

A laser output power adjustment method, apparatus and system, a computer device, and a storage medium. The laser output power adjustment method comprises: acquiring actual output power data of a laser (S302); performing Kalman filtering processing on the actual output power data to obtain estimated power data (S304); acquiring temperature data of the laser, and on the basis of the temperature data, determining whether the current temperature of the laser is within a preset temperature range (S306); in response to the current temperature being within the preset temperature range, performing first-order inertial filtering processing on the basis of the estimated power data to obtain power filtering data, and on the basis of the power filtering data, determining target output power data (S308); and on the basis of the target output power data, adjusting the actual output power of the laser (S310).

A system of head protection with an integrated air filtration mechanism for protecting the user from impact / concussion and ambient air pollution. Example embodiments comprise a rigid helmet shell covering the head of the user and a fabric air barrier around the user's neck, a battery powered filtered centrifugal fan contained inside an external detachable cowl apparatus adjoins to a helmet external top spoiler with a mounting system that is easily removable to meet impact attenuation standards. The cowl apparatus directs clean filtered air into the duct system—a top spoiler funnel connected to an internal clean air duct and exits the visor air curtain providing continual clean laminar airflow between the user's face and the face shield. One or more sensors, calibrated to detect harmful particulates and a processor to automatically activate the system as a protective measure when harmful particulates are encountered and a sensor to detect when filter element needs replacement.

The invention provides a high-power filter based on fractional order positive and negative inductor parallel connection and a control method, and the filter comprises a fractional order negative inductor # imgabs0 # and a positive inductor # imgabs1 # which are connected in parallel. The fractional order negative inductor # imgabs2 comprises a first switch tube V1, a second switch tube V2, a third switch tube V3, a fourth switch tube V4, filter inductors L1 and L2, a filter capacitor Cf, a filter damper Rf, a grounding capacitor Cg, a sampling resistor R, a DC-DC conversion circuit, a self-powered module, an MCU controller, a digital-to-analog converter AD and a sine pulse width modulation module SPWM. According to the scheme, the inductance value and the order of the fractional-order inductor can be changed at will by changing the parameters of the MCU controller, so that the inductance value of the high-power filter with the fractional-order positive and negative inductors connected in parallel is changed, and low cost, small size, high power density and flexible and adjustable order and inductance value of the filter inductor are realized; and the method can be applied to a high-power scene with relatively high harmonic content, and a better filtering effect is achieved.

The utility model is suitable for the technical field of power supply filters, and provides an adjustable inductance type power supply filter, which comprises a sound insulation shell and an adjusting assembly, the adjusting assembly comprises a plurality of partition plates arranged in the inner cavity of the sound insulation shell side by side, and the partition plates are in sliding fit with the sound insulation shell. Through holes for mutual connection of filters are formed in the plurality of spacing plates in a penetrating manner; the power interface and the load interface are arranged on the outer side of the sound insulation shell and are electrically connected with the corresponding filters respectively; according to the utility model, through the arrangement of the adjusting assembly and the arrangement of the slidable spacing board, the spacing between the cavities can be adjusted, and the position of the filter can be adjusted; a user can finely adjust the filter according to specific power supply signal characteristics and application requirements, and the performance of the filter is optimized; meanwhile, the sound insulation shell is made of an insulating material, so that external noise can be effectively isolated, and the purity of signals is ensured; and the output of the filter is more stable and reliable.

The invention discloses a UPS (Uninterrupted Power Supply) based on an ARM (Advanced RISC Machines) processor dual-temperature compensation algorithm, which comprises a UPS body connected with a remote monitoring end and electronic equipment, the UPS power supply body comprises an ARM processor, a dual-temperature sensor module, a battery pack module, a communication interface module, an input power supply module, an alarm module, an output power supply module, a power filtering module, an overload protection module and a DC / AC conversion module. According to the invention, the temperature change in the UPS power supply body is monitored, and the ARM processor and the dual-temperature compensation algorithm are combined according to the temperature change condition to carry out temperature compensation, so that the performance of the UPS power supply body can be optimized, the stability and efficiency of the UPS power supply body are improved, the UPS power supply body can work stably in different temperature environments, and the power supply reliability is improved. And the stability of the UPS power supply body can be further enhanced through the cooperation of the arrangement of the power filtering module and the overload protection module.

The invention relates to the technical field of industrial control, and discloses a data analysis processing controller. The controller comprises a cabinet, an aviation plug front panel and a cabinet VPX backboard. External 24V direct current is connected with a cabinet VPX backboard through the power supply filtering module and is reduced to 12V direct current through the power supply module. A main control module, a digital quantity input / output module, an analog quantity input / output module and two reserved slot positions are integrated on a VPX backboard of the case, and all the modules are inserted into the standard slot positions through VPX connectors. The main control module is communicated with the function module through an RS232 bus and is integrated with a gigabit Ethernet, an RS485 interface and a CAN (Controller Area Network) interface; the digital quantity module adopts a dual-channel optical coupler isolation and self-checking technology, and the analog quantity module realizes dynamic fault switching through redundant output and controllable voltage superposition. Internal cable connection is eliminated through a VPX framework, the reliability, expansibility and real-time response capability of the system are remarkably improved by combining multi-stage power supply filtering and cold conduction and heat dissipation design, and the system is suitable for ship distance adjusting devices and other complex industrial environments.

The invention relates to the technical field of automobile production, in particular to an automobile window control module, a photochromic glass assembly, an informatization glass assembly and an automobile. Wherein the vehicle window control module comprises a main control MCU, and a power supply module, a switch detection module and a motor driving module which are respectively in communication connection with the main control MCU, the motor driving module is electrically connected with a motor used for opening and closing a vehicle window, and the vehicle window control module further comprises a glass color changing control module and an informatization glass control module which are respectively in communication connection with the main control MCU; the glass color-changing control module comprises a P-channel enhanced MOS (Metal Oxide Semiconductor) tube and a power supply filtering loop; a grid electrode G of the P-channel enhanced MOS tube is electrically connected with the main control MCU, a drain electrode D is used for being connected with a vehicle body power supply, and a source electrode S is electrically connected with the power supply filtering loop; the informatization glass control module comprises a plurality of photoelectric LED controllers in communication connection with the master control MCU, and the car window control module can serve as a car window control assembly to achieve color changing and informatization control over car windows.

The application discloses a kind of LCL grid-connected current feedback active damping control method and system, belong to power filter control technical field, including the grid-connected current i2 of the acquisition inverter net side;Grid-connected current i2 flows through negative low-pass-high-pass filter and is handled, obtains feedback current;Feedback current and the output of inverter current controller are superposed, as the control signal of LCL filter.The application will not amplify high-frequency harmonic current, and the control system still has good robustness when LCL filter parameter changes.

The invention provides a Faraday cage device for calibration of an electrostatic discharge simulator, which is used for solving the problem of electromagnetic interference during calibration of the electrostatic discharge simulator and has the advantages of better shielding performance, heat dissipation performance and the like. The device comprises a box body and a box door, the box door is connected with the box body through a hinge, a lock catch structure is arranged at the opening and closing position of the box body and the box door, and a door handle is installed on the left side of the box door; an electrostatic discharge target and a grounding pole are installed on the left side of the outer surface of the box body, and the grounding pole is located under the target center of the electrostatic discharge target. A partition plate is arranged in the box body and is lower than the electrostatic discharge target; a coaxial flange connected to the outside of the box body is arranged on the rear side of the inner surface of the box body and is higher than the partition plate; and the power supply filter is arranged on the rear side of the inner surface of the box body and is lower than the partition plate.

The invention provides a harmonic protection device for electric energy management, which comprises a cabinet body, a cabinet door is arranged on one side of the cabinet body, a partition plate parallel to the bottom of the cabinet body is arranged in the cabinet body, the partition plate is slidably arranged in the cabinet body in the vertical direction, and an air guide cylinder assembly is arranged on the partition plate in the vertical direction. The power filter is arranged in the air guide cylinder assembly, the air guide cylinder assembly is provided with a dust sweeping brush corresponding to the outer side of the power filter, a reciprocating driving mechanism for driving the partition plate to reciprocate up and down is arranged in the cabinet body, and the reciprocating driving mechanism is in transmission connection with the air outlet fan; in the heat dissipation device, the reciprocating driving mechanism drives the partition plate to move up and down in the heat dissipation process, the outer side of the power filter can be swept up and down through the dust sweeping brush in the air guide cylinder assembly, dust is prevented from adhering to the outer side of the power filter, dust adhering to the outer side of the active power filter can be reduced, and the heat dissipation effect of the active power filter is guaranteed; and the performance reduction caused by over-high temperature is avoided.

The utility model provides a high-temperature-resistant sinusoidal signal source filter circuit, which comprises a high-stability oscillation source module, the high-stability oscillation source module is composed of a crystal oscillator Y1 and other elements, the frequency stability of an oscillation source is ensured, the output frequency of a sinusoidal signal source can be changed by changing the frequency of the crystal oscillator, an inverter U1B shapes and outputs oscillation source signals, and the signal quality is further ensured. The power supply filtering module effectively eliminates circuit noise and interference, the high-stability voltage source module supplies power to the oscillation source circuit through a resistor R1, a voltage stabilizing diode D1 and a capacitor C5, the temperature stability of the oscillation source circuit is good due to the characteristics of the voltage stabilizing diode D1, and it is guaranteed that the circuit works stably under different conditions. The signal amplitude adjusting module can flexibly change the output amplitude of the sinusoidal signal source, the active band-pass filtering module can accurately convert square wave signals output by the oscillation source into sine wave signals, parameter setting is reasonable, and the characteristics of quality factor Q, gain G, center frequency F and the like enable the signal processing effect to be good. And parameters of the band-pass filter are matched with parameters of the oscillating source during debugging, so that the circuit is stable and reliable in overall performance, and is suitable for high-temperature environments and other scenes with high signal quality requirements.

The utility model relates to the technical field of key devices of a microwave communication system, in particular to an absorption type ultra-wideband high-power filter, which comprises a shell, an input joint, an output joint, a T-shaped branch joint, a passband signal branch, an out-of-band signal branch and a ventilation assembly, an air outlet pipe is communicated with the shell and positioned on one side of the shell, a transverse plate is fixedly connected with the air outlet pipe, and the transverse plate is fixedly connected with the T-shaped branch joint. The micro motor is fixedly connected with the transverse plate, the rotating shaft is fixedly connected with the micro motor, the spiral blade is fixedly connected with the rotating shaft, the air inlet pipe communicates with the shell, and the micro motor on one side of the transverse plate is started through the control end, so that the rotating shaft drives the spiral blade to rotate, air in the shell is extracted, and cold air outside the shell is extracted into the shell; and the heat emitted by the mixed parts is discharged from the air outlet pipe, so that the heat in the shell is emitted in such a manner, the normal work of the parts in the shell is ensured, and the maintenance cost is reduced.

The utility model discloses an anti-shock power supply filter, which comprises a power supply filter shell, a capacitor, a resistor, an inductor and a winding assembly, the capacitor, the resistor and the inductor are all arranged in the power supply filter shell, a wire is tightly wound on the resistor, and the winding assembly is used for winding the wire on the resistor. The winding assembly comprises a rack, a transmission rod and a guide module. According to the utility model, the transmission rod rotates and drives the linkage rod to synchronously link through the crawler belt, so that the rotation of the linkage rod drives the resistance porcelain tube connected to the linkage rod to rotate, a wire is wound on the surface of the linkage rod, and the sliding rod slides in the limiting notch in a limiting manner while the transmission rod rotates; according to the wire winding device, the guide module is arranged, then the guide base is driven to move to guide wires, the wires can be evenly wound and prevented from being stacked, the wires on the resistor can be wound more tightly through the arrangement of the guide module, and then the situation that the wire winding resistor vibrates and is damaged can be effectively avoided.

The utility model discloses a power filter with a protection structure, which comprises a power filter shell, an aluminum substrate is fixedly connected inside the power filter shell, a bottom shell is fixedly connected to the outer wall of the power filter shell, an air outlet net is fixedly embedded in the outer wall of the bottom shell, and a protective cover is fixedly arranged on the outer wall of the bottom shell. The outer wall of the bottom shell is fixedly connected with two U-shaped footstands, and the outer wall of the bottom shell is provided with a mounting mechanism. Heat in the power filter shell is dissipated through the heat dissipation fan, the four rectangular installation strips slide out of the two rectangular sleeves, telescoping and installation are carried out according to reserved installation positions of an electric cabinet, installation holes can be conveniently close to the reserved positions, applicability is improved, meanwhile, an output line and an input line are arranged, and the power filter shell is convenient to use. The output line and the input line shell are clamped into the rubber buckle, and cross or parallel mutual interference is avoided.

The invention discloses a P-band high-power filtering and amplitude limiting assembly, which belongs to the technical field of microwaves and comprises a filter, an amplitude limiter, a polarizer, a coupler and a metal cavity. The amplitude limiter is installed on the bottom layer of the metal cavity, the filter and the polarizer are installed on the top layer of the metal cavity, the coupler is installed on the side wall of the metal cavity, the filter, the low-pass filter and the polarizer are connected in a wall-penetrating welding mode through a 50-ohm metal connecting rod, and the polarizer is fixed to the metal cavity through a medium supporting column. The whole assembly belongs to an upper-lower layer structure. According to the assembly, the transmission path between devices is shortened, the emission loss of the assembly is reduced, the size of the filtering and amplitude limiting assembly is greatly reduced under the condition that composite multiple functions are met, and the purposes of high power and high integration are achieved.

The application relates to a laser output power adjusting method, device, system, computer equipment and storage medium. The method comprises the following steps: collecting actual output power data of a laser; performing Kalman filtering processing on the actual output power data to obtain power estimation data; acquiring temperature data of the laser, and judging whether the current temperature of the laser is within a preset temperature range according to the temperature data; in response to the current temperature being within the preset temperature range, performing first-order inertia filtering processing on the power estimation data to obtain power filtering data, and determining target output power data according to the power filtering data; and adjusting the actual output power of the laser according to the target output power data. The method can provide stability of laser output power.

Embodiments of the present application provide a high-power low-dropout linear regulator system, which can be applied to the field of electronic circuit and power filter technology. The linear regulator system comprises a feedback compensation module and a driving sampling module, wherein the driving sampling module comprises a driving unit, a power adjustment transistor and a voltage dividing and sampling network; the voltage dividing and sampling network is configured to divide the initial output voltage to generate a feedback voltage signal; the feedback compensation module is configured to perform error amplification processing on the feedback voltage signal and a reference voltage signal from a reference voltage source to output a driving signal; the driving unit is configured to perform impedance conversion on the driving signal to output a buffer driving signal; and the power adjustment transistor is configured to linearly convert a direct current input voltage provided by a direct current power supply into an output voltage after voltage stabilization according to the buffer driving signal.

The invention relates to the technical field of filters, and provides a power EMI filter. The power EMI filter comprises a differential mode filter circuit and a common mode filter circuit. The differential mode filter circuit comprises a first-stage differential mode capacitor bank, a second-stage differential mode capacitor bank, a first differential mode inductor and a second differential mode inductor; the common-mode filter circuit comprises a first-stage common-mode capacitor bank, a second-stage common-mode capacitor bank, a first common-mode inductor and a second common-mode inductor; the first-stage differential-mode capacitor bank and the second-stage differential-mode capacitor bank are connected in parallel, the first-stage differential-mode capacitor bank is connected to the upstream of the first common-mode inductor, and the second-stage differential-mode capacitor bank is connected to the downstream of the first common-mode inductor; the first-stage common-mode capacitor bank is connected to the upstream of the second common-mode inductor, and the second-stage common-mode capacitor bank is connected to the downstream of the second common-mode inductor; the first differential mode inductor is connected with one end of the second-stage common mode capacitor bank, and the second differential mode inductor is connected with the other end of the second-stage common mode capacitor bank; the differential mode interference suppression frequency band can be effectively widened, and the suppression effect can be improved.

The utility model relates to the technical field of filters, in particular to a miniaturized large-current high-voltage airborne power supply filter. Comprising a shell, circuit components are arranged in the shell, an aviation socket is arranged at one end of the shell, a gold-plated copper platform is arranged at the end, different from the aviation socket, of the shell, the circuit components comprise a plurality of first capacitors, a plurality of second capacitors and a plurality of third capacitors, and first inductors are connected between the first capacitors and the second capacitors which are adjacent. According to the utility model, the input end of the filter uses the aviation socket to replace a bolt on one side in the prior art, and the output end uses the gold-plated copper platform to replace a bolt on the other side, so that the installation is more convenient and faster, the required operation space is small, a torque wrench is not needed, the size of the whole machine is reduced, and the cost is reduced. The method is suitable for specific aviation scenes.

The application provides a power supply filtering circuit, a power supply module and an electronic device, and belongs to the field of switching power supplies. The power supply filtering circuit comprises a low dropout linear regulator (LDO) and a virtual ground voltage generating circuit. An input end of the LDO is used to receive an input voltage as an input end of the power supply filtering circuit, and an output end of the LDO is used to output an output voltage as an output end of the power supply filtering circuit; an input end of the virtual ground voltage generating circuit is coupled with the input end of the LDO, and an output end of the virtual ground voltage generating circuit is coupled with a ground end of the LDO; the virtual ground voltage generating circuit is configured to output a virtual ground voltage to the ground end of the LDO, and the virtual ground voltage changes in the same direction as the input voltage, so that the LDO is in a normal working state. The application embodiment enables the LDO to still work normally in the filtering scene of dynamic high-voltage input or wide-voltage input range.

Capacitorless solid-state power filter for power converters and electrical power systems. The capacitorless solid-state power filter has a high-frequency planar transformer and a high-frequency power converter. The capacitorless solid-state power filter injects voltage harmonics into the output voltage of a power converter or other source of raw voltage to attain a smoothed output voltage suitable for a given electrical load component. The capacitorless solid-state power filter can be implemented with a DC-DC and / or a DC-AC power converter to provide a smoothed output voltage, such as a flat wave (DC) or a sinusoidal wave (AC). The power converter is capable of generating a smoothed output voltage without relying on capacitors. The capacitorless solid-state power filter may be incorporated into different types of electrical power systems, such as marine systems, aeronautic systems, and / or utility power grids.

The utility model relates to a high-precision laser altimeter with temperature compensation. The high-precision laser altimeter mainly solves the problem that an existing laser altimeter is unstable in output or has no height data output at the low temperature of minus 40 DEG C to minus 25 DEG C and the high temperature of 50 DEG C to 70 DEG C. The device comprises a laser emitting unit, a laser receiving unit, a lens unit, a digital signal processing unit and an EMI power supply filtering unit. Laser emitted by the laser emitting unit is collimated and parallel through the lens unit and then is emitted to the ground, and a reflected optical signal is converged to the laser receiving unit through the lens unit and is converted into an electric signal to enter the digital signal processing unit for height measurement; the EMI power supply filtering unit supplies power to the laser emitting unit, the laser receiving unit and the digital signal processing unit. According to the utility model, the height measurement precision and stability at the environment temperature of-40 DEG C to 70 DEG C are improved, the requirements of the helicopter for high precision and wide temperature range of matched height measurement equipment when the helicopter flies at a low altitude or close to the ground and lands at a fixed point are met, and the device can be used for helicopters and various aircrafts.

A method for estimating electrical parameters of an electric motor (205) and a power filter (203) connected to a power converter (201) including injecting an AC signal of different frequencies for a given time window in the power filter (203) and the motor (205), measuring a response signal of the power filter (203) and the motor (205) to the injected AC signal, determining a resonance frequency of the power filter (203) based on the measured response signal, calculating a ratio of leakage inductances of the power filter (203) and the motor (205).

The invention relates to the technical field of power supply filtering, and discloses a power supply filter with a signal masking function, which comprises a shell module for packaging each functional module and providing electromagnetic shielding; the passive filtering module performs primary filtering on a power supply signal to reduce low-frequency and intermediate-frequency noise; the signal sampling and spectrum analysis module samples and analyzes the frequency domain characteristics of the power supply signal, and extracts a target frequency band signal; the abnormal signal identification module identifies and judges abnormal coupling signals; the interference signal generation module generates a masking signal to suppress an abnormal signal; the closed-loop feedback control module adjusts parameters of the passive filtering and interference signal generation module in real time; and the output and verification module outputs and verifies the processed signal effect. The closed-loop feedback control technology is adopted, the technical effect of optimizing the system performance is achieved by monitoring the working state of the system in real time and dynamically adjusting the parameters of the filter and the interference signal module, and the defect that a traditional method cannot adapt to different working conditions in real time is overcome.

In some embodiments, an apparatus can include a printed circuit board (PCB) that has layers and includes a first portion and a second portion. The first portion can have a data port and a power port. A first layer is associated with data of the first portion of the PCB, and a second layer is associated with power of the first portion of the PCB. The second portion can have a data port and a power port. A third layer is associated with data of the second portion, and a fourth layer is associated with power of the second portion. The first portion or the second portion can have vias defining an electromagnetic interference (EMI) shield. The apparatus can include a power filter and a data filter that can, respectively, isolate power and data of the first portion from the second portion.

1. Name of the Design Product: 8-channel Power Filter Manager. 2. Use of the Design Product: The design product is used for power filters. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective View 1.

The present invention is directed at a method for evaluating the degradation level of capacitors of a power filter connected to an adjustable speed drive (ASD) or a power converter. The invention is also directed at an adjustable speed drive and a power converter provided for performing the method.