125 results about "Power filter" patented technology

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 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 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 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 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 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.

This invention discloses an anti-clogging biofiltration device coupled with a microbial fuel cell, applied in the field of biofiltration technology. It includes: a biofilter consisting of a porous media coarse filter layer, a cathode region, and an anode region arranged sequentially from top to bottom; a Helmholtz coil array deployed around the biofilter; and an external circuit that, together with the anode and cathode regions, constitutes the microbial fuel cell. The microbial fuel cell provides self-sufficient power to the cathode region, anode region, and Helmholtz coil array for anti-clogging biofiltration. This invention effectively solves the problems of accumulated clogging in EPS (expanded power filters) and the inability to clean the bottom filter media, and realizes self-generated electricity for the microbial fuel cell.

The utility model relates to communication technical field, concretely is a kind of gigabit ethernet port protection circuit.The protection circuit includes: difference signal positive electrode circuit and difference signal negative electrode circuit, for forming signal transmission path;Difference impedance matching circuit is used to suppress signal reflection;Power filter network circuit is used to filter high-frequency noise and suppress common-mode interference.The circuit architecture design of the utility model systematically solves the core technical problem in the high-speed transmission of gigabit ethernet port.In the signal transmission level, two-stage resistance-capacitance isolation and dynamic impedance matching mechanism construct the parameter self-adaptive signal transmission path, through the impedance buffer of series resistance, the direct current isolation of coupling capacitor and the dynamic adjustment of difference pair network, effectively suppress signal reflection and direct current bias interference, ensure the integrity of 10Gbps high-frequency signal in long-distance transmission.

The invention discloses an efficient anti-disassembly power supply filter with a connector, and belongs to the technical field of production of power supply filters with connectors, the efficient anti-disassembly power supply filter comprises a shell, a cover plate, a filtering electronic assembly, an electric connector and an elastic column assembly, the elastic column assembly comprises a threaded pipe with an external thread, a telescopic column and a pressure spring, one end of the telescopic column is arranged in the threaded pipe and supported by the compression spring, the other end of the telescopic column is located outside the threaded pipe, the cover plate connecting screws penetrate through the cover plate connecting through holes of the cover plates and then are connected with the shell, a plurality of cover plate connecting bosses are arranged below the cover plates, and cover plate connecting screw holes are formed in the cover plate connecting bosses. The threaded pipes of the multiple elastic column assemblies are installed in the corresponding cover plate connecting screw holes respectively, and the multiple shell connecting screws penetrate through the multiple shell transverse through holes of the shell respectively, then are arranged in the cover plate connecting screw holes and make contact with the ends of the corresponding telescopic columns. By adding the elastic column assembly and the shell connecting screw which are matched with each other, the efficient anti-disassembly function is achieved, and the application requirement is met.

The invention relates to the technical field of electronic circuits, and discloses a DC brush motor disturbance power filter circuit, which comprises a main filter module, a working condition sensing module, a pulse characteristic detection module, a controllable transient damping module, a ringing state evaluation module and a cooperative control module. The operating condition of the motor is monitored in real time through the working condition sensing module, the pulse characteristic detection module identifies a transient pulse event and evaluates the ringing state, the cooperative control module integrates the information, dynamically tunes the filtering parameters of the main filtering module, and accurately triggers the controllable transient damping module to introduce damping, so that the control precision of the motor is improved. According to the invention, adaptive high-efficiency filtering of wide-working-condition conducted disturbance of the direct-current brush motor is realized, active rapid suppression of transient ringing is realized, the electromagnetic compatibility, the power quality and the operation stability of a system are remarkably improved, and the limitation of a traditional fixed parameter filter in a complex dynamic environment is overcome.

The utility model discloses a switch cabinet partial discharge signal acquisition processing circuit based on a current method and a gain method, comprising a chip U10 and an operational amplifier U11, a pin 2 of the operational amplifier U11 is provided with a high-low pass filter circuit, a pin 5 of the operational amplifier U11 is provided with a signal filter circuit, the high-low pass filter circuit and the signal filter circuit are jointly connected with a current sensor, and the current sensor is connected with the operational amplifier U11. The current sensor is installed on a main cable of the switch cabinet and used for detecting a current signal PD A, a pin 4 and a pin 8 of the operational amplifier U11 are provided with power supply filter circuits, and a pin 1 of the operational amplifier U11 is connected with a pin 3, a pin 4 and a pin 5 of the chip U10. According to the utility model, the current sensor is directly installed on the main cable, a current signal PD A of the main cable can be filtered and amplified and then sent to the programmable gain device U10, the current signal PD A can be restored and amplified to the greatest extent so as to be conveniently processed by a single-chip microcomputer, the partial discharge position of the high-voltage cable can be accurately reflected, and the device can be applied to GIS equipment, and has the advantages of small size, low cost and high reliability. The cost is low.

The invention belongs to the technical field of electric driving of electric vehicles, and particularly relates to a motor controller for an electric vehicle, which comprises a motor controller shell, an isolation power supply module, a PCB (Printed Circuit Board), a high-voltage power supply filter, a heat-conducting gasket, a low-voltage power supply filter and a ground piece between the PCB and the motor controller shell, according to the motor controller for the electric vehicle, the Y capacitor in the high-voltage direct-current power supply filter is mounted on the filter metal shell through the metal shell, and the filter shell is in contact with the motor controller metal shell through the exposed metal bottom surface, so that the grounding area is increased, and the motor controller has relatively good electromagnetic interference suppression efficiency; the motor controller used for the 800V platform electric drive system can meet related requirements, and the electromagnetic compatibility of the 800V platform electric vehicle is improved.

The utility model relates to the field of on-off testing, and discloses an on-off testing device, which comprises a supporting plate, the supporting plate is fixed on the top surface of a base, the outer wall of the supporting plate is provided with a mounting frame in a sliding manner, an air cylinder is fixed in the mounting frame, the left side and the right side of the outer wall of the mounting frame are respectively provided with a first threaded hole, and a second threaded hole is formed in the left side and the right side of the mounting frame. First threaded rods are in threaded connection with the interiors of the two first threaded holes correspondingly, and rotating rods are fixed to the outer walls of the two first threaded rods correspondingly. According to the utility model, through cooperative use of the supporting plate, the mounting rack, the cylinder, the moving block, the probe, the placing seat, the first threaded hole, the first screw rod and the rotating rod, power-on and power-off testing of the power supply filter is facilitated, and the heights of the mounting rack and the cylinder can be adjusted, so that the test requirements of power supply filters with different heights are met; and the flexibility and practicability of the device are improved.

The utility model discloses an intelligent wireless gas automatic fire extinguishing alarm host which comprises a metal plate shell, an air circuit breaker, a power filter and a data concentrator are installed in the metal plate shell through track strips, a liquid crystal touch screen is installed at the outer end of the metal plate shell, and an alarm indicator lamp is installed at the bottom of the metal plate shell. A hole ring is arranged at the inner bottom of the metal plate shell, and an air pressure control structure for controlling the expansion state of the rubber ring is arranged in the metal plate shell. According to the utility model, the communication address of the equipment can be randomly and independently modified, a batch debugging tool is not needed, the 485 communication quality of the host can be improved, the problem of 485 communication abnormity can be solved, secondly, after a line passes through the hole ring and is led out, the expansion of the rubber ring is controlled through the air pressure control structure, so that the expanded rubber ring seals the gap between the line and the hole ring, and the communication efficiency is improved. According to the design, dust, foreign matters, moisture and water can be effectively prevented from entering the equipment through the wiring hole, and the protection performance of the equipment is improved.

This utility model discloses a control circuit for driving a mobile robot, including a charger module, a power supply module, a communication module, a control module, an IMU module, and an interface module. The power supply module includes a power switching module, a power filtering and voltage regulation module, a power management module, a power monitoring module, and a key switch for a host computer. The power management module includes a power control module and a power distribution module. The power control module receives voltage requirements from different circuit components and transmits them to the power distribution module. The power distribution module converts the input voltage into a specific output voltage to meet the needs of different circuit components. Through high-speed data transmission, coordinated and precise control, and real-time status feedback between the power supply module, control module, and communication module, the dynamic stability of the mobile robot's drive control, the response speed of the mobile robot, and its endurance are improved.

The utility model relates to the technical field of filters, in particular to a high-voltage-resistant industrial power supply filter, which comprises a filter body, radiating fins are arranged on the front surface and the rear surface of the filter body, ventilation openings communicated with the inside are formed in the top surface and the bottom surface of the filter body, and dustproof assemblies cover the ventilation openings. The dustproof assembly is detachably connected with the filter body, a heat dissipation assembly is arranged below the ventilation opening in the top, the heat dissipation assembly is detachably connected with the filter body, and the bottom surface of the filter body is detachably connected with a lifting assembly. By arranging the upper and lower ventilation openings and the lifting assembly, bottom ventilation is enhanced, the heat dissipation effect is improved, and interference with other parts is avoided in different space scenes.

The utility model discloses a metal oxide semiconductor (MOS) tube aluminum substrate auxiliary system, which is connected with a main control board system through a contact pin and is controlled by the main control board system, adopts a printed circuit board (PCB) structure of which the front surface is provided with elements and the back surface is provided with an aluminum substrate, and comprises a three-phase current detection module, comprising three phase current detection circuits used for detecting phase current of a three-phase motor in real time, and the phase current detection circuits realize phase current detection through a phase current detection chip, a current detection resistor, a switching tube formed by connecting an N-MOS upper tube and an N-MOS lower tube in series, and a path from a power supply positive electrode to a power supply negative electrode; the illumination driving module comprises a headlight illumination driving unit for controlling headlights and a taillight illumination driving unit for controlling taillights; the power supply filtering module comprises a plurality of patch high-voltage capacitors which are connected in parallel between the power supply positive electrode and the power supply negative electrode; and the temperature detection module comprises a plurality of temperature detection resistors for detecting the temperature in real time.

The invention discloses a robot joint module controller which comprises an MCU module used for receiving feedback signals of all modules, outputting control instructions and completing data interaction with external equipment, an encoder and a data storage unit; and the power supply input module is integrated with a reverse connection protection unit, a transient voltage suppression unit and a power supply filtering unit, and is used for realizing power supply reverse connection protection, transient overvoltage suppression and power supply ripple absorption, providing stable input voltage for the MCU module, constructing a full-dimension multi-protection mechanism, and greatly improving the operation reliability of the controller under extreme working conditions. The controller integrates six protection functions of reverse connection protection, hardware short circuit protection, software overload protection, motor / PCBA double-circuit over-temperature protection, overvoltage and undervoltage protection and transient voltage suppression, can comprehensively cope with various extreme working conditions such as power supply reverse connection, short circuit, overload, overheating, voltage abnormity and counter electromotive force impact, effectively avoids damage to the controller and the motor, and improves the reliability of the controller. The service life of the joint module is prolonged.

This utility model relates to the field of display module technology, specifically a display module circuit, including: a power supply module and a driver chip. The power supply module is connected to a step-down isolation circuit, which is connected to a power filter. The power supply module is also connected to the driver chip; the driver chip is model HX8363-A03; the power filter is a CW4EL2, and the power filter consists of a filter circuit composed of capacitors, inductors, and resistors. The power filter provided in this utility model includes an LC power filter and ferrite beads. The LC power filter can filter out high-frequency noise and low-frequency ripple in the power supply, while the ferrite beads have a good suppression effect on high-frequency noise, effectively improving the stability and purity of the power supply.

The invention relates to the technical field of power filters, in particular to a self-adaptive variable-frequency insertion loss adjusting power filter. According to the technical scheme, the self-adaptive variable-frequency insertion loss adjusting power filter comprises a resonance induction and frequency acquisition module and a resonance parameter matching and optimizing module, according to the invention, the frequency self-adaptive tracking of the resonance circuit is realized through the resonance parameter matching and optimizing module, and the capacitor array adjusting unit adopts a voltage-controlled variable capacitance diode array; the inductance compensation unit utilizes an MEMS adjustable inductor to change the inductance value through a driving coil, and when the resonance induction module captures the frequency change, the control module immediately calls a pre-stored resonance fingerprint database, generates an adjusting instruction through a PID controller, and drives a variable capacitance diode and the MEMS inductor to synchronously adjust, so that the resonance frequency is always kept synchronous with the power supply frequency; and the efficiency of the filter at a high frequency band is effectively improved.

The utility model discloses a 36V electronic bathroom and water heater water pump drive circuit, which comprises a power supply filter circuit, a main control circuit, a feedback circuit, a speed regulation circuit and an inverter circuit, the main control circuit is connected with the power supply filter circuit, the feedback circuit, the speed regulation circuit and the inverter circuit. The main control circuit is powered on, enters a standby state, receives an SP instruction of the speed regulation circuit, outputs an inversion signal to control the inversion circuit, outputs three-phase power supply of the motor, operates the motor, monitors the state in real time, outputs a corresponding signal and feeds back the signal to a client through an FG signal of the feedback circuit. The water pump driving circuit integrates the built-in power supply filter circuit, the master control circuit, the feedback circuit, the speed regulation circuit and the inverter circuit, and can work by independently configuring a power supply and communication interface. The integrated circuit is high in integration level, simple in circuit design, small in size and convenient for reserved heat dissipation design of a PCB (Printed Circuit Board).

The utility model relates to the technical field of PLC cabinets, in particular to a comprehensive intelligent control system of a PLC cabinet, which comprises a PLC cabinet body, a control mechanism is arranged in the PLC cabinet body, and a switch is mounted at the top of the PLC cabinet body. The control mechanism comprises a phase sequence protector fixedly connected in the PLC cabinet body, a power supply filter is arranged in the PLC cabinet body and close to the phase sequence protector, a direct current power supply module is fixedly connected in the PLC cabinet body and close to the power supply filter, an isolator is installed in the PLC cabinet body, and the PLC cabinet body is connected with the power supply filter. The PLC cabinet body is internally provided with an isolator, a diode is installed at the position, away from the isolator, of the interior of the PLC cabinet body, the interior of the PLC cabinet body is provided with a wiring terminal, the comprehensive intelligent control system of the PLC cabinet is designed, comprehensive control is conducted through a control mechanism in the device, and the problems that an existing PLC cannot conduct comprehensive control on equipment, and the intelligent degree is low are solved.

The utility model discloses a kind of LC power supply filter medium dielectric voltage withstand test tool, including circuit board and buckle socket. Circuit board is arranged in multiple rows of test area array, multiple buckle sockets are installed with interval in each test area, and the socket lead-out end corresponding to each buckle socket is provided with through-hole pad;Buckle socket is connected to be measured filter, its lead-out end is correspondingly conductive with filter pin, and is conducted through through-hole pad;The first, second copper conductor on circuit board respectively short-circuit the positive, negative electrode lead-out end of each test area and are summarized to form positive, negative electrode passage, then through high temperature wire connection voltage withstand equipment.The utility model realizes the synchronous test of multiple products, improves efficiency, and connection is stable, easy to operate, guarantee test accuracy and tool reliability.

The utility model discloses an energy storage all-in-one machine which comprises a cabinet, a strong current cabin and a weak current cabin are arranged in the cabinet in a separated mode, and a support and a battery module are arranged in the strong current cabin. An intelligent control assembly, an inverter, a charger and the like are arranged in the weak current cabin; in the charging and discharging process of the battery module, the movement of electrons can generate a changing electromagnetic field; an electromagnetic shielding plate is arranged in the strong current cabin, a power supply channel is arranged between the strong current cabin and the weak current cabin, and a power supply filter is arranged in the power supply channel. Therefore, hidden danger of electromagnetic interference is eliminated, module communication blocking is avoided, and normal operation of equipment is guaranteed. A fan is arranged in the weak current cabin, an air conditioner is arranged in the strong current cabin, different heat dissipation modes are adopted according to different heating characteristics of the strong current area and the weak current area, and the heat dissipation effect is improved; a front cabinet door is arranged at the corresponding position of the strong current cabin, and a side cabinet door is arranged at the corresponding position of the weak current cabin, so that maintenance difficulty is reduced while maintenance is facilitated.

The application relates to a PCB-based half-brick module test tool, belonging to the technical field of switches, and solves the problems of large workload, complexity and hidden safety hazards caused by manual welding and manual wiring during test tooling in the prior art. The test tool comprises an input filter circuit, a half-brick module interface plate and an output filter circuit connected in sequence; all components of the half-brick module test tool are integrated on a PCB board, and a plurality of test points are arranged on the PCB board; the plurality of test points are arranged between the input filter circuit and the half-brick module interface plate and between the half-brick module interface plate and the output filter circuit; the input filter circuit sends the DC power filtered through the half-brick module interface plate into the half-brick module; and the output signal of the half-brick module is sent to the output filter circuit through the half-brick module interface plate and is output after being filtered. The test process of the half-brick module becomes simple, efficient, comprehensive and reliable.