207 results about "Rectiformer" patented technology

The application provides a combined movable multifunctional long-time emergency power supply, comprising a fuel engine for outputting high-frequency three-phase alternating current and a power output control system for controlling output current, wherein the power output control system comprises a rectifier and an inverter, an input end of the rectifier is connected with a power supply output end of the fuel engine, the rectifier inputs high-frequency three-phase alternating current input by the fuel engine after AC-DC conversion to a direct-current bus, a control end of the direct-current bus is bidirectionally communicated with a main controller, and the main controller monitors an instantaneous value of input current on the direct-current bus in real time and controls the direct-current bus to output corresponding direct-current to the inverter and a charge-discharge controller through electric signals respectively. The emergency power supply device of the application can adapt to various load demands: through modular design, different function modules can be flexibly replaced, so as to meet the power load demand of impact, electric vehicle charging, emergency long-time power supply and power grid connection and the power demand of various different scenes.

The utility model relates to PCB board production equipment technical field, the technical problem that the utility model solves is uneven current distribution, rework rate is too high. In order to solve the above technical problem, the utility model provides a kind of copper tank for the copper of PCB board immersion copper. The utility model includes: rectifier;Outer tank body is equipped with medicine water and conductive roller;Soaking tank is located in outer tank body;Conveying assembly is located in soaking tank, and conveying assembly includes upper roller piece group and the lower roller piece group corresponding with being equipped in upper roller piece group below;Anode plate assembly is located in soaking tank;Anode plate assembly includes upper conductive plate and the lower conductive plate corresponding with being equipped in upper conductive plate below;Upper conductive plate is located in upper roller piece group;Positive terminal is connected with upper conductive plate, lower conductive plate, and negative terminal is connected with conductive roller;Rectifier, conductive roller, circuit board, upper conductive plate, lower conductive plate and soaking liquid constitute circuit loop. The utility model current distribution is more uniform, and rework is reduced.

A method for operating a radio frequency energy harvester (RFEH) comprises, for each rectifier of the RFEH having connected thereto a switching device configured to be actuated between an open state in which an output of the rectifier is open-circuited to form part of a combined DC output voltage and a closed state in which the output of the rectifier is short-circuited to be omitted from the combined DC output voltage, measuring a voltage difference between the rectifier's input and output, comparing the voltage difference to a voltage threshold, when the voltage difference is below the voltage threshold, causing the switching device to be actuated to the closed state, and when the voltage difference is greater than or equal to the voltage threshold, causing the switching device to be actuated to the open state.

The application discloses a kind of three-phase rectifier multiple switch tube open-circuit fault diagnosis methods based on voltage deviation, belong to power electronic converter fault diagnosis technical field.Method includes: obtaining relevant signal for diagnosis;According to three-phase voltage, three-phase current, three-phase inductance value, three-phase equivalent resistance value and switching period, the actual value of three-phase line voltage is calculated;According to DC voltage and the duty cycle of switch tube on three-phase bridge arm, the expected value of three-phase line voltage is calculated;Difference is obtained between the expected value and actual value of three-phase line voltage;The deviation value of three-phase line voltage is compared with first preset threshold and second preset threshold, to determine the polarity of the deviation value of three-phase line voltage;Wherein, first preset threshold is less than second preset threshold;The polarity of the deviation value of three-phase line voltage is combined with voltage phase, to determine fault switch tube.The application can quickly diagnose for various situations of multiple switch tube fault, including single switch fault, two switch tubes in succession fault, two switch tubes simultaneous fault.

A switching control unit is applicable to an electric power conversion apparatus. The electric power conversion apparatus includes: a transformer; an inverter circuit including first switching devices; a synchronous rectifying circuit including second switching devices serving as rectifying devices; and a smoothing circuit. The switching control unit includes: a first current detection circuit detecting a peak current value of a secondary current; a second current detection circuit detecting an output current value; and a control circuit controlling respective operations of the first switching devices of the inverter circuit and respective operations of the second switching devices of the synchronous rectifying circuit. The control circuit sets a timing of switching from an on-state to an off-state of each of the second switching devices based on the peak current value detected by the first current detection circuit and the output current value detected by the second current detection circuit.

The utility model provides a kind of high -efficient heat dissipation's transformer rectifier device, it is related to transformer rectifier technical field, including rectifier transformer;The top middle position of rectifier transformer is consistent with the bottom middle position of heat dissipation frame, and copper pipe is connected with the inside position of heat dissipation frame.In its left and right sides are provided with the sliding plate of auxiliary fan, formed the structure of top and two sides multi-position simultaneous heat dissipation, the copper pipe of top can quickly absorb the heat of rectifier transformer, cooperate with heat dissipation fan to accelerate heat dissipation;The auxiliary fan of two sides is directly against the air blowing of transformer side, enhances the air flow of side.Solved the existing device although adopt from bottom to top airflow heat dissipation mode, but heat dissipation position is relatively single, mainly rely on the airflow formed by bottom air inlet and top exhaust, difficult to cover each area of rectifier transformer comprehensively, especially for the side surface and other parts of transformer, the problem of poor heat dissipation effect.

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

Transformer-driven switching devices and transformer-driven power switch systems are disclosed, where the transformer-driven switching devices are used to switch high currents. These devices include power switches, such as gallium nitride (GaN) transistors. Transformers are used to transfer both control timing and power used to control the power switches. These transformers can be coreless, such that they can be integrated within a silicon die. Rectifiers, pull-down control circuits, and their related components are preferably integrated in the same die as the power switches, for example, in a GaN die, such that the transformer-driven switching devices will be fully included in silicon and GaN dies, without necessarily requiring a cored transformer, an auxiliary power supply, or a level shifting circuit.

The present invention relates to a charging system (1) having at least one DC power connector (2, 3) and at least one AC power connector (8) and a battery power connector (6), wherein the battery power connector (6) is capable of being connected to a battery (7), particularly a vehicle high-voltage battery (7), wherein at least one AC power connector (8) is connected to a rectifier (10), wherein a first DC voltage converter (11) is present. Electrical energy or current can be distributed in a highly efficient and optimized manner by means of a first DC voltage converter (11) connected to the DC side of a rectifier (10), wherein the first DC voltage converter (11) is configured as a boost / buck converter, wherein a current isolation element (12) is connected to the first DC voltage converter (11) and a battery power connector (6), wherein at least one DC power connector (2, 3) is connected to the rectifier (10) and the first DC voltage converter (11) via a first switch group (S1a), and is connected to the first DC voltage converter (11) and the current isolation element (12) via a second switch group (S1b).

The present disclosure relates to wireless power systems with charging alerts. A wireless power system has a first electronic device and a second electronic device. The first electronic device can receive power from an alternating current-direct current power converter. A magnetic sensor and / or other sensing circuitry can detect when the second electronic device is attached to the first electronic device. In response to detecting device attachment and receiving power from the power converter, the first electronic device sends a test wireless power signal to the second electronic device. During receipt of the test signal, the second electronic device adjusts a ballast load so that output current from a rectifier in the second electronic device flows through the ballast load. The output of the rectifier is measured and compared to a threshold voltage. If the rectifier output voltage exceeds the threshold, the first electronic device is instructed to alert a user that wireless charging of the second electronic device is starting.

A vessel power system configured for a marine vessel includes a rectifier configured to receive an AC power input from a shore power source and provide a DC charging output to charge a battery and an active phase circuit configured to provide a regulated AC output to power onboard AC loads on the marine vessel. The active phase circuit is connected to the output of the rectifier and includes a return connection configured to form a return path for electric current from the onboard AC loads and configured such that the rectifier and the active phase circuit are configured to split the AC power input from the shore power source into the DC charging output to charge the battery and the regulated AC output to power the onboard AC loads.

This invention provides a system for thermal protection in power distribution equipment. [Solution] The power distribution system 100 includes a first silicon-controlled rectifier (SCR) 106A and a second SCR 106B connected to a heat sink. A first temperature sensor 105A senses the temperature of the first SCR, and a second temperature sensor 105B senses the temperature of the second SCR. While the second SCR is disconnected from the load, the control unit compares the temperature from the first temperature sensor with a plurality of temperature thresholds, and in response that the temperature reading from the first temperature sensor exceeds a first threshold but not a second threshold, generates a first warning, and further, in response that the temperature reading from the first temperature sensor exceeds a second threshold, it may disconnect the first SCR from the load and connect the second SCR to the load.

This utility model provides a rectifier with safety protection function, relating to the field of rectifier technology. The rectifier with safety protection function includes a rectifier body, an external protective cover, and a protective base plate connected to the protective cover. The protective cover, rectifier body, and protective base plate are all I-shaped, and the size of the protective base plate is adapted to the protective cover. Heat dissipation is achieved through heat dissipation holes on the front and rear sides of the rectifier body. A heat-conducting heat dissipation component is used to conduct heat generated on multiple sides of the rectifier body to the outside for heat dissipation, avoiding the situation where the surface of the rectifier body in contact with the protective cover cannot dissipate heat quickly. A cooling fan is used to directly dissipate heat from the top and interior of the rectifier body, and with the help of a guide plate, heat can be quickly dissipated from the heat dissipation slots to the outside, resulting in good heat dissipation effect for the rectifier body.

This utility model discloses an adjustable-spacing transformer and rectifier mounting base, specifically relating to the field of transformer and rectifier installation technology. It includes a base crossbeam and two mounting frames located above the base crossbeam. Each mounting frame includes two mounting longitudinal plates and a second mounting transverse plate welded between the two longitudinal plates. After equipment installation, if the spacing between the transformer and rectifier is incorrect, external tools can be used to connect positive and negative lead screws and drive them to rotate. This causes the sliders to move away from each other, and through linkage transmission, the base plate moves downwards into the inner side of the base crossbeam, reducing friction between the mounting frame and the base crossbeam, facilitating fine-tuning. Furthermore, no holes need to be drilled in the base crossbeam before adjustment; drilling is only required after the spacing is adjusted. This simplifies the installation process, improves installation efficiency, avoids damage to the structural strength of the base crossbeam from excessive drilling, and extends the service life of the base.

A power generating system comprising an electrical generating set and a modulator configured to maintain optimal voltage regulation under varying load conditions. The system includes a controllable current power source; an active rectifier coupled to the controllable current power source, configured to rectify an output of the controllable current power source to supply utility-grade power or for recharge of a battery or batteries. A controller is configured to adjust at least one of the parameters of the controllable current power source and / or supply from the generator and a parameter of the active rectifier in response to a target output.

The utility model discloses a kind of electric energy storage type intelligent efficient belt pressure devices, belong to belt pressure device technical field, comprising: electric energy storage system, electric power system, belt pressure source system and PLC data acquisition system, the electric energy storage system includes external power supply interface and energy storage battery pack, the external power supply interface is electrically connected with energy storage battery pack, the lateral wall of the energy storage battery pack is fixedly installed with intelligent allocation control display, rectifier is fixedly installed on the intelligent allocation control display, the electric connection between the intelligent allocation control display, rectifier and output circuit. The electric energy storage of utility model device is large, can carry out intelligent allocation compensation;With the mode of double-electric independent power supply and hybrid power supply, meet the emergency demand under special circumstances, reduce the influence on the operation of device;Adopt common DC AC variable frequency transmission and control technology, and capacitance performance is more stable.

This invention discloses a DC / DC converter and control method suitable for offshore wind farms. The invention uses a boost converter to realize the boost voltage and power transmission of the full DC wind farm bus, and a buck converter to establish the AC side grid voltage during the wind farm startup phase, providing the startup power of the wind farm and realizing black start of the offshore wind farm. Furthermore, by controlling the MMC and diode uncontrolled rectifier, fault ride-through under short-circuit faults on both DC buses can be achieved, ensuring the reliable operation of the power transmission system.

This invention discloses an LLC resonant converter with a wide output voltage range based on a voltage doubler rectifier, applicable to DC fast charging of new energy vehicles. The converter achieves primary-side inversion and secondary-side rectification topology reconfiguration through switch drive signals, enabling wide-range voltage output in four operating modes. The primary side can switch between half-bridge and full-bridge inversion modes, while the secondary side can switch between full-bridge, voltage doubler, and voltage quadruple rectifier modes. This invention reduces diode voltage stress, possesses self-balancing capability of the voltage doubler capacitor, and achieves soft switching across the entire voltage range. Ultra-wide voltage gain is achieved within a narrow frequency adjustment range across the entire voltage range through simple pulse frequency modulation (PFM), allowing the converter to adapt to the charging needs of new energy vehicles with different voltage platforms.

A stator defines multiple stator poles with associated stator windings. A rotor defines multiple rotor poles with associated rotor windings configured to be energized substantially by the stator. The rotor defines a rotor field energizable by magnetic fields produced by the stator windings to produce relative force between the rotor and the stator. An active rectifier is conductively coupled to one or more first rotor windings. The active rectifier is configured to control a direction of current flow through the one or more first rotor windings responsive to a signal received wirelessly from the stator by one or more second rotor windings.

The application provides a kind of adaptive rectifier control system and method supporting multiple input voltage mode, it is related to rectification control technical field, according to input voltage control quantity determines the regulating effect order of rectifier in the current control period that can balance midpoint voltage, determines the voltage amplitude level of rectifier's midpoint potential on adaptation interval and the voltage equalization strategy corresponding to current input voltage mode;Equivalent compensation error corresponding load working condition is judged to jump, and the voltage jump vector of rectifier under matching load condition is obtained, the gain switching of voltage equalization strategy to voltage jump vector is carried out, and the critical output criterion of rectifier under different switching operating state is obtained;According to critical output criterion, the negative sequence superposition instruction of rectifier when correcting input voltage is automatically fault-tolerant regulation and control.The application can accurately fault-tolerant regulation and control to rectifier's negative sequence regulation and control under multiple input voltage fluctuation conditions, to improve the adaptive regulation and control stability of rectifier.

A converter includes a first stage connected to first and second input terminals and including a first-stage IC having a feedback terminal, a first half-bridge circuit and a second half-bridge circuit connected in parallel, each of the first and second half-bridge circuits including a half-bridge IC that receives a clock signal from the first stage, a transformer including a single magnetic core, a first primary winding extending around the single magnetic core and connected to the first half-bridge circuit, a second primary winding extending around the single magnetic core and connected to the second half-bridge circuit, and a secondary winding extending around the single magnetic core, a rectifier connected to the secondary winding, first and second output terminals connected to the rectifier, and a feedback circuit connected between the first output terminal and the feedback terminal of the first-stage IC.

The application discloses a topology structure and a control method of a bipolar composite offshore converter station, belongs to the technical field of offshore power transmission and distribution, and aims at solving the problems of large volume, complex structure and poor system reliability of the existing offshore wind power. The bipolar composite offshore converter station comprises a positive pole and a negative pole; the positive pole adopts a half-bridge modular multilevel converter topology structure, the negative pole adopts a diode rectifier topology structure, the two topology structures are connected in parallel at an alternating current side and are connected in series at a direct current side, and a direct current connection point is used as a grounding pole to form a symmetric bipolar structure. The topology structure of a shore converter station comprises: the positive pole and the negative pole both adopt a half-bridge modular multilevel converter topology structure. The control method comprises the following steps: when a direct current of the grounding pole increases from zero, an alternating current voltage rated value of the offshore converter station is added with a fine adjustment amount, the added value is used as a given value of a d-axis voltage ring of a wind turbine, the direct current of the grounding pole is kept as zero, power balance control of the positive pole and the negative pole is realized, and the application is used for the offshore converter station.

The present disclosure provides a charging module and a dual-mode wireless charging system. The charging module includes: a DC / DC converter circuit, a low-frequency charging unit, a high-frequency charging unit, and a controller. The low-frequency charging unit includes low-frequency coils, a low-frequency compensation circuit, and a low-frequency rectifier circuit connected to the DC / DC converter circuit being successively connected. The high-frequency charging unit includes high-frequency coils, a high-frequency tuning circuit, and a high-frequency rectifier circuit connected to the DC / DC converter circuit being successively connected. The high-frequency coils are non-coaxial with the low-frequency coils and partially overlapped with the low-frequency coils, and / or the controller is configured to control, in response to detecting that the high-frequency charging unit supplies power to the battery, the low-frequency charging unit to be turned on or turned off, such that the low-frequency coils are short-circuited or open-circuited at a high operating frequency.

This invention discloses an active disturbance rejection energy feedback control method and system for a variable frequency drive motor, belonging to the field of motor drive control technology. The method includes: employing a virtual synchronous motor control strategy for the grid-side rectifier of the back-to-back inverter to provide virtual inertia and damping to the power grid; employing vector control for the motor-side inverter; establishing a small-signal model of the system; and adaptively tuning the virtual inertia and damping parameters based on the model response characteristics and DC voltage constraints to achieve active disturbance rejection energy feedback during regenerative braking. The system includes: a back-to-back inverter, a grid-side rectifier controller, a motor-side inverter controller, and a parameter tuning module, which work together to implement the above method. This invention effectively suppresses the impact of feedback power on the power grid, fully utilizes the buffering capacity of the DC capacitor, and achieves efficient energy feedback while ensuring DC voltage stability, thereby improving the overall energy efficiency and operational safety of the system.

This application belongs to the field of rail transit technology, and particularly relates to a train over-phase control method and system. It includes: real-time monitoring of over-phase signals and acquisition of train speed signals; determining whether the medium-voltage support of the train traction system inverter is available; when an over-phase signal is detected, the medium-voltage support of the train traction system inverter is available, and the train speed exceeds a first speed threshold, generating a state transition signal; controlling the train traction system inverter to switch to regenerative braking mode based on the state transition signal, and controlling the train traction system rectifier to stop working after the state transition signal continues for a first time threshold; when the train main circuit breaker is detected to be closed, controlling the train traction system rectifier to restart; and controlling the train traction system inverter to exit regenerative braking mode after the train traction system rectifier has stably operated in PWM rectification mode. This application achieves seamless medium-voltage transition by first supporting and then blocking the inverter.

The application relates to a switching power supply system, an LLC resonant converter abnormal state detection circuit and a control method. The circuit comprises an LLC resonant converter comprising an isolation transformer; a detection circuit comprising a secondary side auxiliary winding arranged on the isolation transformer, which outputs a sampling signal after rectification and filtering; and a digital controller connected to the detection circuit to obtain the sampling signal and output an LLC primary side switching tube driving signal; the digital controller is configured to: after the LLC resonant converter is successfully started, according to the comparison result of the control loop output value and the first threshold value, combined with the LLC working state represented by the sampling signal, logical judgment is carried out, when the judgment condition is continuously met, it is judged that the LLC working state is abnormal, shutdown protection is carried out and an alarm is given. Through the above-mentioned circuit combined with logical judgment, the LLC resonant converter abnormal state can be detected, and in the multi-rectifier output parallel application scene, the abnormality of the LLC resonant converter of an individual rectifier can be identified and alarmed.

The application provides a rectifier health assessment method, an uninterruptible power supply and a computer readable storage medium. The method comprises the following steps: obtaining the soft start time length of the rectifier and the actual input electric energy of the entire soft start stage when the rectifier starts; obtaining the reference input electric energy according to the soft start time length, wherein the power supply device stores reference input electric energies corresponding to a plurality of different soft start time lengths; when the actual input electric energy exceeds the reference input electric energy to reach a preset electric energy threshold, controlling the rectifier to start again with a plurality of different soft start time lengths; obtaining the actual output electric energy of the rectifier under each soft start time length, and confirming that the health state of the rectifier is abnormal when the actual input electric energy under each soft start time length exceeds the reference input electric energy corresponding to the soft start time length to reach the preset electric energy threshold. The application can greatly improve the accuracy of rectifier health state assessment and reduce the detection cost.