206 results about "Power factor corrector" patented technology

The invention relates to the technical field of generator control, and discloses an intelligent vehicle-mounted high-power self-generating control method and system. The method comprises the following steps: acquiring operating parameters of a generator set, performing high-precision digital processing, realizing constant-rotating-speed control through cooperation of multiple controllers based on a rotating-speed fluctuation characteristic value, performing power factor correction through coordinate transformation and active rectification to obtain a direct-current bus voltage, performing precise voltage stabilization by adopting a multi-phase interleaving converter, and outputting the direct-current bus voltage. And finally, outputting a high-quality three-phase alternating-current power supply through space vector modulation and closed-loop feedback control. The technical problems in the prior art that the power supply quality control capability is insufficient, the intelligent level is low, the environmental adaptability is poor, the load adaptability is limited, and the maneuverability is limited are solved.

An on board charger for a vehicle including an electric machine and a battery system includes a power inverter and a DC-DC converter. A filter including first and second inputs is selectively connected to an AC source and first and second outputs. The first output of the filter is connected to one of the first node, the second node, and the third node between switches of phase legs of the power inverter. A switching device includes a first terminal connected to the one of the first node, the second node, and the third node, a second terminal connected to a second output of the filter, and a third terminal connected to one of the first, second, and third phase windings of the electric machine corresponding the one of the first node, the second node, and the third node.

A single-stage isolation type three-phase Cuk rectification circuit comprises a three-phase AC power supply in star connection, three bridgeless isolation type Cuk rectification circuit bridge arm modules with the same structure, an output filter capacitor Co and a load RL. The input ends of the three bridgeless isolation type Cuk rectifier circuit bridge arm modules are line voltages of a three-phase alternating current power supply, and are uab, ubc and uca respectively; the output ends of the three bridgeless isolation type Cuk rectifier circuit bridge arm modules are connected in parallel, and the parallel output ends are connected in parallel with the output filter capacitor Co; and the output filter capacitor Co is connected in parallel with the load RL. The converter has the functions of buck-boost output, power factor correction and electrical isolation, meanwhile, each Cuk rectification circuit bridge arm is of a bridgeless structure, input and output current is continuous, the power factor is high, efficiency is high, positive wide-range output voltage is achieved, the current stress of a switching device is small, and the converter has rich application scenes.

A battery pack charger may include a housing. The battery pack charger may include a battery pack interface provided on the housing and configured to removably receive a battery pack. The battery pack charger may include a power input. The battery pack charger may include an LLC converter including a dual transformer electrically connected between the power input and the battery pack interface. The battery pack charger may include a power factor correction (PFC) boost converter electrically connected between the power input and the battery pack interface. The battery pack charger may include an input inrush current control circuit electrically connected between the PFC boost converter and the battery pack interface.

A power factor correction (PFC) boost converter system and method of operation includes a control system connected to a bridgeless PFC converter which includes a first voltage measurement circuit connected to measure a first voltage, a second voltage measurement circuit connected to measure a second voltage, and a third voltage measurement circuit connected to measure a third voltage, where the control system is connected to compute a reconstructed PFC input current signal from the first, second, and third voltages and to output a set of control signals for controlling the PFC converter based on the reconstructed PFC input current signal and the boosted output voltage.

A method is for adaptively controlling a charging module that converts three-phase AC input to DC output with improved power factor correction. The method includes performing Clarke and Park transforms on input three-phase AC voltages to obtain d-q axis components, measuring and transforming boost inductor currents to obtain current axis components, generating control values through current-loop and voltage-loop modules based on target and measured values, and synthesizing PWM signals to control switching operations. The method features adaptive phase angle computation using a proportional-integral controller that responds to load variations in real-time. The control system maintains high power factor under varying load conditions by continuously adjusting the phase reference based on the q-axis voltage error. This approach minimizes power losses, reduces harmonic distortion, and ensures stable operation across the full operating range of the charging module while maintaining unity power factor.

The invention provides a vehicle-mounted charging circuit, a charging method and a charging system for an electric vehicle facing a 800V power battery, and relates to the field of manufacturing of related facilities of the electric vehicle, the circuit comprises a power factor correction module, a primary side power conversion module, a high-frequency isolation transformer, a bipolar charging module and a power battery equalization module; the input side of the power factor correction module is connected with an alternating current power grid, and the power factor correction module is used for rectifying alternating current into direct current; the primary side power conversion module is used for converting the direct current output by the power factor correction module into high-frequency alternating current; the high-frequency isolation transformer comprises at least two windings, and the two windings are connected with the primary side power conversion module and the bipolar charging module respectively; the bipolar charging module is connected with a 800V power battery, and the 800V power battery comprises two groups of 400V battery packs; the power battery equalization module is used for equalization management of two groups of 400V battery packs, and has the advantages of improving charging speed and efficiency of 800V power batteries and reducing equalization difficulty and cost.

The application discloses a power factor correction module, a controller and an electrical equipment, and relates to the technical field of power factor correction. The power factor correction module comprises a substrate, a rectification circuit, a switching circuit, a direct current output terminal, a voltage transformation input terminal and a high-voltage access terminal. The rectification circuit and the switching circuit are formed on the substrate. The direct current output terminal is electrically connected with the rectification circuit. The voltage transformation input terminal is electrically connected with the switching circuit. The high-voltage access terminal is connected with the output terminal of the switching circuit. The high-voltage access terminal is used for accessing an external load. The direct current output terminal and the voltage transformation input terminal are respectively used for accessing two ends of an external inductor, so that the external inductor and the switching circuit form a PFC loop when the external inductor is accessed. In this way, by integrating the rectification circuit and the switching circuit on the same substrate, the number of elements of the rectification circuit and the PFC circuit is reduced, the volume of the rectification circuit and the PFC circuit is reduced, and the installation convenience of the rectification circuit and the FPC circuit is improved.

A wireless power transfer facility includes: a power factor correction device that converts AC front-stage input power received from a commercial power source into DC front-stage output power and has a plurality of output terminals for outputting the front-stage output power; a plurality of inverters that are respectively connected to the output terminals of the power factor correction device and convert DC rear-stage input power including the DC front-stage output power received from the output terminals into AC rear-stage output power; a plurality of power transmission coils that are respectively connected to the plurality of inverters and receive the rear-stage output power; and a control device that performs control so that the front-stage input power output to the power factor correction device does not exceed allowable power of the commercial power source.

The application provides a power factor correction circuit and electronic equipment, and belongs to the technical field of electronics. The power factor correction circuit comprises a power supply unit, a power factor correction unit, a compensation unit and a controller. The compensation unit comprises an amplifier and a ground capacitance. One end of the ground capacitance is electrically connected with the output end of the amplifier, and the other end of the ground capacitance is grounded. The controller is used for outputting a first control signal to the power factor correction unit, and is used for inputting a second control signal to the amplifier. The second control signal makes the amplitude difference between the voltage of the ground capacitance and the ground voltage of the input end of the switch tube within a preset amplitude difference range, the phases opposite and the phase difference within a preset phase difference range. The application has the effect of reducing electromagnetic interference.

Disclosed herein is a power control system of a processing plant, the power control system comprising: a control system configured to determine power characterisation data of the power supply to one or more loads in the processing plant; a power factor correction system configured to apply a power factor correction to the power supply; a vibration sensor system configured to generate vibration data of one or more locations in the processing plant and to transmit the vibration data to the control system; and a flowrate sensor system configured to generate flowrate data of fluid in one or more conduits in the processing plant and transmit the flowrate data to the control system; wherein the power factor correction applied to the power supply by the power factor correction system is generated in dependence on the determined power characterisation data and at least one of the vibration data and flowrate data.

The application discloses a PFC circuit and an electric flame stove suitable for direct current and alternating current, comprising a voltage switching control module, a filter module, an inverter voltage boosting module, a full-bridge rectifying module and a power factor correction module. The voltage switching control module detects input voltage and controls the on-off of the filter module and the inverter voltage boosting module respectively, realizing the adaptation of 48V direct current and 220V alternating current voltage input. The power factor correction module adopts a Boost (voltage boosting) type active PFC topology, the high-frequency on-off control of the switching tube Q7 / Q8 is realized through the control chip U2 / U3, the input current waveform follows the input voltage waveform, the power factor is improved to above 0.95, the switching tube Q8 is adopted to replace the diode in the prior art, there is no voltage and current loss when the switching tube is turned on, the stable current and voltage output are ensured, the voltage / current waveform is consistent, and the power factor is improved.

The application discloses an ACDC isolation converter topology, and relates to the technical field of power electronic converters.The EMI filter module of the topology suppresses the differential mode and common mode interference of alternating current, and after rectification, the APFC boost module actively performs power factor correction on the alternating current, and the voltage of the direct current bus is raised; the switching control module controls the complementary turn-on of the half-bridge switching tube, and sets a dead time; the half-bridge inverter resonance module chops the direct current input of the direct current bus into a square wave signal, the series resonance current is formed by the equivalent inductance of the primary side of the integrated inductive transformer, and electrical isolation is simultaneously completed; the alternating current energy output by the secondary side of the integrated inductive transformer is rectified by the full-bridge synchronous rectification module to obtain direct current output; the switching frequency of the half-bridge switching tube is adjusted by the switching control module, and constant current control is performed.The application can reduce the EMI filter loss, switching loss, rectification loss and feedback cost while ensuring high PF and low THD, and realizes high-efficiency constant current output.

A device, such as a resonant power converter as discussed herein, may comprise the following features: a first transformer winding; a sensing circuit arrangement effective in sensing a first energy supplied to the first transformer winding by an input voltage; and a switching circuit arrangement effective in applying a power factor correction associated with converting the input voltage into an output voltage derived from an output of a second transformer magnetically coupled to the first transformer winding, the power factor correction applied comprising controlling a flux of the first energy from the input voltage to the first transformer winding.

The application provides a voltage stabilizing circuit, a motor control circuit, a motor and an electrical appliance. The voltage stabilizing circuit is used for stabilizing a working circuit, and comprises: an energy processing unit connected in parallel with the working circuit and capable of stabilizing the working circuit; a switching unit connected between the working circuit and the energy processing unit and used for controlling the on-off of the energy processing unit and the working circuit; and a control unit connected with the switching unit and used for controlling the state of the switching unit according to the output power of the working circuit, so that the energy processing unit is connected to or disconnected from the working circuit. The voltage stabilizing circuit has the functions of power factor correction and surge voltage absorption, and can also maintain the minimum value of the bus voltage.

The invention provides a power factor correction method and circuit and power supply equipment, and relates to the technical field of electronic circuit control. The power factor correction circuit comprises a PFC main circuit which comprises at least one main switch; the control circuit is electrically coupled to the PFC main circuit; the compensation circuit comprises a sampling circuit, an inverting circuit and an adjusting circuit, the inverting circuit generates an inverting signal according to a first sampling signal and a second sampling signal collected by the sampling circuit, and the first sampling signal and the second sampling signal reflect the input voltage and the output voltage of the PFC main circuit respectively; the adjusting circuit generates different compensation additional values according to different input voltages, generates compensation signals corresponding to the current input voltage level according to the inversion signals and the compensation additional values and outputs the compensation signals to the control circuit, and the control circuit adjusts the conduction time of the main switch at the input voltage zero crossing point according to the compensation signals. THD optimization under different input voltages can be realized.

A method of operating a circuit is disclosed. The method includes providing an interleaved power factor correction (PFC) converter circuit; determining a switching frequency of the interleaved PFC converter circuit; setting a phase shift of the interleaved PFC converter circuit at a first phase shift when the switching frequency of the interleaved PFC converter circuit is below or at a first switching frequency; setting the phase shift of the interleaved PFC converter circuit at a second phase shift when the switching frequency of the interleaved PFC converter circuit is greater than the first switching frequency but less than a second switching frequency; and setting the phase shift of the interleaved PFC converter circuit at the first phase shift when the switching frequency of interleaved the PFC converter circuit is greater than the second switching frequency.

This invention discloses an air conditioner and its compressor control method and device. The control method includes: when the compressor is in a field weakening control mode, acquiring the current three-phase current of the compressor; acquiring the current d-axis voltage and current q-axis voltage based on the current three-phase current; processing the current d-axis voltage and current q-axis voltage to obtain a processed voltage signal; multiplying the processed voltage signal by the reciprocal of an adjustment coefficient, and determining the product as a current adjustment bus voltage command; performing power factor correction control based on the current adjustment bus voltage command; further acquiring the current feedback modulation rate for field weakening control, limiting the current feedback modulation rate to obtain a current processed feedback modulation rate; determining the current field weakening control current based on the current processed feedback modulation rate; and executing field weakening control based on the current field weakening control current. Using this invention, the performance of the compressor in different control processes can be improved.

The invention discloses a vehicle-mounted charger and a vehicle. The vehicle-mounted charger comprises a power factor correction unit, a first inversion unit, an isolation transformation unit and a second inversion unit which are connected in sequence; the AC end of the power factor correction unit is connected with an external AC power supply and is used for rectifying and outputting AC input of the external AC power supply or rectifying and outputting AC to the external AC power supply; the first inversion unit is used for inverting alternating current input of an external alternating current power supply into high-frequency alternating current, the high-frequency alternating current is output to the second inversion unit in an isolated mode through the isolation voltage transformation unit, the high-frequency alternating current is inverted and rectified into high-voltage direct current through the second inversion unit, and the high-voltage direct current is output to a battery pack of a vehicle; high-voltage direct current output by a battery pack of the vehicle is converted into high-frequency alternating current through the second inversion unit and the isolation transformation unit, and the high-frequency alternating current is inversed and then is reversely rectified by the power factor correction unit and output to an external alternating current power supply. According to the invention, the resonance efficiency is improved, and the vehicle-mounted charger is more power-saving, more durable and faster in charging.

The invention discloses an active lag power factor correction system, which belongs to the technical field of power factor correction control, and comprises a double-closed-loop control circuit consisting of a low-speed outer voltage loop circuit and a high-speed inner current loop circuit, on one hand, the low-speed outer voltage loop circuit is used for stabilizing input voltage, and on the other hand, the high-speed inner current loop circuit is used for stabilizing output voltage; on the other hand, the low-speed outer voltage loop circuit is used for providing a reference signal for the high-speed inner current loop circuit; the fast inner current loop circuit controls the input current to follow the input voltage based on the reference signal. Compared with the prior art, the system solves the technical problem that traditional PFC control is sensitive to an EMI filter through an innovative control strategy of injecting an input voltage orthogonal component, achieves the technical effects of high PF, low THDI, high adaptability and high reliability, improves the system efficiency, reduces the application cost, and has remarkable engineering value.

This invention discloses a control method, control device, and air conditioner compressor. The control method includes: acquiring the current three-phase current and current bus voltage of the compressor; acquiring a current adjustment bus voltage command based on the current three-phase current; acquiring a current feedback modulation rate based on the current bus voltage; determining the current feedback modulation rate deviation to be 0 when the current feedback modulation rate is greater than the modulation rate setting and the current adjustment bus voltage command is less than the maximum limit value of the voltage command; otherwise, determining the current feedback modulation rate deviation to be the difference between the modulation rate setting and the current feedback modulation rate; determining a current field weakening control current based on the current feedback modulation rate deviation; performing field weakening control based on the current field weakening control current; and performing power factor correction control based on the current adjustment bus voltage command. Using this invention, the performance of the compressor in different control processes can be improved.

This invention proposes a power modulation system, comprising: a rectifier unit having a first input terminal, a second input terminal, a first output terminal, and a second output terminal, wherein the first input terminal and the second input terminal are connected to an AC power grid, and the rectifier unit is used to convert AC power into DC power; a power factor correction unit connected in parallel between the first output terminal and the second output terminal; the power modulation system further includes a filter unit having a third capacitor element and a switching element, and connected in parallel between the first output terminal and the second output terminal. The power modulation system proposed in this invention effectively improves the power factor when the brushless motor is running at high speed, and ensures output torque and reduces motor copper losses when the brushless motor is running at low speed.

The invention relates to a two-stage converter circuit comprising a first stage that is configured to provide power factor correction and a second stage that is configured to provide electric isolation and fixed voltage-to-voltage conversion. The converter circuit is configured to fulfil input requirements (e.g., total harmonic distortion (THD), power factor (PF) etc.) and apply isolation by means of a self-oscillating converter. Thereby efficiency can be improved and costs reduced for LED drivers or other driver circuits that require an isolated output.

The invention relates to a control method of a matrix type three-phase AC-DC unipolar converter and the converter, and relates to the technical field of power conversion, and the control method comprises the following steps: S10, obtaining a three-phase input voltage and a three-phase input current respectively; s20, obtaining a power grid voltage phase angle according to the three-phase input voltage; s30, calculating two-phase reference current according to the power grid voltage phase angle and the current reference amplitude; s40, comparing the input current of the corresponding phase with the reference current so as to carry out power factor correction; s50, respectively acquiring direct current output voltage and current, and calculating to obtain direct current output power; s60, adjusting a secondary side inner phase shift angle according to the direct current output voltage and the three-phase input voltage so as to control the direct current output voltage; and S70, comparing the direct-current output power with the reference power to adjust an external phase shift angle, and performing feedback adjustment on the direct-current output power, so that rapid power adjustment of the AC-DC converter in a wide voltage range can be realized, and the electric energy conversion efficiency is improved.

1. The name of the design product: power factor correction inductance. 2. The use of the design product: used as power factor correction inductance. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 2.

A method and an apparatus for adjusting power interruption hold up time, and a microprocessor, a storage medium, an electronic device, and a computer program product are provided. The method includes: in a case where it is determined that the power interruption hold up time of a server power supply unit (PSU) needs to be adjusted, acquiring input power consumption of the server PSU and a voltage difference between output voltages of a power supply power factor correction (PFC) stage circuit. The input power consumption is detected by a first detection circuit, and the voltage difference is detected by a second detection circuit; determining, a correspondence between the power interruption hold up time of the server PSU and an output capacitance of the power supply PFC stage circuit; and adjusting the output capacitance to adjust the power interruption hold up time of the server PSU.

The application discloses a carrier frequency control method, a control device and an air conditioner for power factor correction, wherein the carrier frequency control method is a special carrier frequency control method used near the zero-crossing point of the variable carrier frequency control method; for the carrier frequency corresponding to the input voltage / input current near the zero-crossing point, the carrier frequency is limited to a fixed value or is increased with the decrease of the input voltage / input current, so that the input current of the PFC circuit near the zero-crossing point cannot follow the input voltage, the current harmonic of the PFC circuit is reduced, and the working stability of the PFC circuit is improved.

The invention discloses an air conditioning system and a control method of the air conditioning system, relates to the technical field of air conditioners, and can avoid the problem of device burnout caused by improper start-stop time sequence of each module in the air conditioning system. The air conditioning system comprises an outdoor unit; the driving module is used for controlling on-off of a circuit in the air conditioning system and the operation state of the outdoor unit; the power factor correction module is used for improving a power factor between the power supply and the outdoor unit; the main control module is configured to respond to a received state change instruction and determine a state change sequence of the driving module and the power factor correction module based on the state change instruction; the state change instruction is used for indicating the outdoor unit to start running or stop running; and according to the state change sequence, the driving module and the power factor correction module are controlled to sequentially carry out state change, so that the outdoor unit starts running or stops running.

An electronic device, a power factor correction filter, and an electronic device are provided. The electronic device includes at least one first inductor, a second inductor, a first comparator circuit, a second comparator circuit, a first reference signal generator, and a second reference signal generator. The first inductor and the second inductor are coupled inductors. The first / second comparator circuit is coupled at a first input to a first / second actuating element, at a second input to the first / second reference signal generator, and at an output to a first / second control circuit. The first / second control circuit is coupled to the first / second inductor in order to output a first / second current signal to the first / second inductor. The first and second reference signals are generated such that the two reference signals differ from each other with respect to time, in order to reduce a deviation from a predefined phase shift between the first current signal and the second current signal.

A method for controlling active and reactive powers in grid-tied converters having a grid side and a battery side, in which said grid side supplies an alternative current to said converter whereas the battery side receives a direct current from said converter, said method comprising direct active and reactive power control in ABC frame where no transformation is used, and wherein active power is controlled by controlling the battery charging and discharging currents, and reactive power is controlled by controlling the phase shift between power factor correction current and voltage.