2148 results about "Rectiformer" patented technology

The invention relates to a dual three-phase permanent magnet synchronous generator rectification system and a direct current voltage stabilization control method thereof. Comprising a dual three-phase permanent magnet synchronous generator, a VSD decoupling converter, a load current observer, a dynamic load feed-forward compensator, a voltage closed-loop controller, a dead-beat predictive current controller, a maximum four-vector SVPWM modulation module and a six-phase rectifier. The double-three-phase topological structure adopted by the invention has the advantages of multiple control degrees of freedom, high reliability and the like. A dynamic load feed-forward compensator is constructed to perform dynamic feed-forward compensation on quadrature-axis current of the motor, so that the recovery time of bus voltage is shortened, and the voltage fluctuation amplitude is reduced; the designed dead-beat predictive current controller optimizes the dynamic characteristics of a current loop, improves the torque tracking performance of the motor, and further improves the voltage stabilization regulation capability of the system. The designed load current observer realizes the analysis redundancy of current detection and improves the reliability of the system.

The invention discloses an output conversion system and method for a UPS (Uninterrupted Power Supply), and the system comprises a main power input end which is connected with a bridge rectifier through a first electromagnetic relay; the energy storage module comprises a super capacitor group and a parallel lithium battery group, and is coupled with the bus capacitor through a bidirectional DC / DC converter; the input end of the multi-path regulation and control module is connected with the bus voltage sensor, and the output end is connected with the switching execution unit through a second electromagnetic relay group; the dynamic switching unit comprises an I-GBT matrix and a reverse blocking diode array which are respectively connected with the inverter and the bypass circuit in parallel; and the real-time monitoring module is provided with a current harmonic analysis unit and a load break variable detection unit, and the output end of the real-time monitoring module is connected with the ADC port of the central processor. According to the invention, systematic improvement is realized in three dimensions of electric energy quality guarantee, equipment reliability and dynamic response capability through an original multi-path regulation and control architecture and a deep cooperative intelligent control strategy.

The invention provides an impedance scanning device based on network side voltage dynamic compensation under a three-phase voltage imbalance working condition, and relates to the technical field of new energy station power electronic converter topology and control, the device comprises a three-phase rectifier, a direct current bus capacitor, an inverter, a voltage compensation device, a frequency sweeping device, a circuit breaker and a series transformer part, the three-phase rectifier is connected in series with inverters of the voltage compensation device and the frequency sweep device, a secondary side of a series transformer of the voltage compensation device is connected in series with a network side, a secondary side of a series transformer of the frequency sweep device is connected in series with a grid-connected point, and a primary side of the series transformer is connected to the inverters and is coupled to a secondary side of the series transformer; according to the device, the power grid side voltage is rectified through the voltage compensation unit and is compensated to the grid side after being subjected to single-stage inversion transformation, voltage compensation is achieved through the energy of a power grid when the voltage is unbalanced, and an external energy source or an interference source does not need to be introduced. After compensation, the accuracy of the frequency sweeping result is obviously improved.

The invention discloses an intelligent charging pile core module based on a VIENNA structure, an electric energy quality management method, system and equipment and a storage medium, and belongs to the field of electric power system energy storage equipment.The intelligent charging pile core module based on the VIENNA structure comprises the steps that an integrated power conversion unit is constructed, the power conversion unit adopts a VIENNA rectifier topology, three-phase alternating current is converted into direct current, and the direct current is converted into direct current; a harmonic suppression structure linked with the control interface is arranged; state information in the operation process is collected and serves as input of the control strategy module; based on the state information, a modulation control instruction is generated in the control strategy module to drive the switching action of the power conversion unit; on the basis of the modulation control instruction, the switch control is executed, meanwhile, the direct-current side midpoint potential of the power conversion unit is synchronously adjusted, and the distribution of direct-current bus capacitor voltage is controlled; and identifying the current operation condition according to the state information, switching to a control template corresponding to the operation condition in the control strategy module, and generating a modulation control instruction.

A power converter topology, comprising: a cascade connection of a first converter stage and a second converter stage; wherein the first converter stage comprises a current mode controlled pulse width modulation (PWM) converter having one or more pairs of switches forming a first switching bridge and an inductor connected to the output of the first switching bridge, the switching bridge generating a voltage Vlink; and wherein the second converter stage is a resonant converter having a switching stage having one or more pairs of switches forming a second switching bridge across the voltage Vlink generated by the first converter stage and a resonant tank connected to the output of the second switching bridge, to generate a resonator output voltage; the topology further comprising a transformer to transform the resonator output voltage to a transformed output voltage and a rectifier to rectify the transformed output voltage to an output voltage Vout, and wherein the duty cycle of the first switching bridge is varied according to a voltage derived from the value of the output voltage Vout, and wherein the duty cycle of the second switching bridge is fixed at 50:50.

Systems, method, and computer readable medium are provided for a controller for a generator. The system includes a rectifier for converting a first AC signal generated by the generator to a first DC signal; a first DC-DC associated with energy storage and a first mode; a second DC-DC associated with an inverter and a second mode; a switch for alternately toggling between the first DC-DC and the second DC-DC, wherein the first mode prevents output to the electrical grid, and the second mode enables inversion of the second DC signal to a second AC signal via the inverter; and a processor that uses the indicator to operate the switch to operate the generator in the first mode when a connection to the grid does not conform with a parameter, and operate the generator in the second mode when the connection to the grid conforms with the parameter.

A system includes: an alternating current (AC) to direct current (DC) converter (AC-DC converter) including a bulk capacitor, the AC-DC converter connectable to a line voltage; a DC to DC converter (DC-DC converter) connected to the AC-DC converter, the DC-DC converter including: one or more transformers having a secondary side connectable to a battery, and a bridge rectifier connected to the secondary side of the one or more transformers, the bridge rectifier including a bridge rectifier switch; and one or more controllers configured to control an operation of the bridge rectifier switch to control a voltage of the bulk capacitor.

The invention provides a single-phase four-quadrant rectifier IGBT open-circuit fault diagnosis method under multiple working conditions, and relates to the technical field of IGBT fault diagnosis. Historical data of alternating current side voltage, alternating current side current and direct current side voltage of the single-phase four-quadrant rectifier are obtained, and a total harmonic distortion rate threshold value, a direct current side voltage threshold value and an alternating current side current first threshold value are obtained. And constructing and training an IGBT open-circuit fault positioning identification model. Detecting the total harmonic distortion rate of the alternating-current side current of the single-phase four-quadrant rectifier in real time, if the total harmonic distortion rate exceeds a threshold value, entering fault positioning, collecting and calculating the average value of the direct-current side voltage and the alternating-current side current in the period, and judging the fault of the single-phase four-quadrant rectifier under the specific working condition according to the comparison of the average value and the threshold value. Or using an IGBT open-circuit fault positioning identification model to diagnose the fault; if the threshold value is not exceeded, the next period is continuously monitored. According to the invention, the IGBT fault diagnosis efficiency and accuracy of the single-phase four-quadrant rectifier are improved.

A system comprises: a high voltage (HV) direct current (DC) to DC converter (HVDC) including: one or more transformers; a bridge driver connected to a primary side of the one or more transformers; and one or more bridge rectifiers connected to a secondary side of the one or more transformers, the one or more bridge rectifiers including one or more bridge rectifier switches; a low voltage (LV) DC to DC converter (LVDC) connected to the HVDC; and a boost converter including: an inductor connected to the one or more bridge rectifier switches; and one or more boost configuration switches operable, in combination with the one or more bridge rectifier switches, to configure the boost converter into each of a bypass configuration and a boost configuration, to regulate a voltage at the LVDC.

A marine AC generator system includes a marine generator driven by an internal combustion engine and configured to generate an AC current and a rectifier configured to rectify the AC current to provide a DC current. At least one battery is configured to receive and be charged by the DC current. A battery powered inverter is configured to be powered by the at least one battery and to generate a variable current output frequency such that an AC electrical power is provided to a load when the marine generator is not running.

The invention discloses a hybrid direct current transmission power coordination control device and a control method and equipment thereof, and relates to the technical field of offshore power generation, and the hybrid direct current transmission power coordination control device comprises a diode rectifier unit and a first modular multilevel converter which are connected with an offshore wind plant, the sending-end converter station is used for converting alternating current generated by an offshore wind plant into direct current and outputting the direct current; the second modularized multi-level current converter is connected with the diode rectifier unit and the land power grid and is used for restoring the direct current into the alternating current and transmitting the alternating current to the land power grid; and the control module is connected with the first modular multilevel converter and is used for controlling the DC voltage of the first modular multilevel converter based on the fluctuation power according to the transfer relation between the active power and the DC voltage of the sending end converter station, so that the higher requirement of the rated capacity of the MMC in the related technology is met, and the reliability of the MMC is improved. And the engineering construction cost is increased.

The application discloses a kind of water electrolysis hydrogen production rectifier transformer harmonic active inhibition optimization method, comprising the following steps: constructing rectifier circuit, rectifier circuit includes switch tube, the voltage vector and zero vector of switch tube output are combined, and combined output voltage vector is obtained;The harmonic amplitude is obtained by processing combined output voltage vector, Levy tangent flight strategy and confidence domain variation strategy are introduced in black-winged kite optimization algorithm to construct improved dynamic search algorithm, the total harmonic distortion is obtained by iterative calculation of harmonic amplitude by improved dynamic search algorithm, i.e. optimal switch tube combination, the switch tube of rectifier circuit is adjusted by optimal switch tube combination, and the total harmonic distortion of rectifier circuit is reduced.The optimal switch tube combination of rectifier circuit is iteratively calculated by improved dynamic search algorithm in the application, effectively reduces resource consumption, and processing speed is accelerated, and the efficiency and accuracy of electrolytic water hydrogen production rectifier are improved.

An electric vehicle charging system comprising a Direct Current (DC) distributor, a site controller, one or more alternating current (AC) / DC rectifiers connected to the DC distributor and the site controller, and an electric vehicle charger having one or more DC / DC converters connected to the DC distributor and a charge controller in communication with the site controller and each of the one or more DC / DC converters. The one or more AC / DC rectifiers are decoupled from the one or more DC / DC converters.

The invention discloses a finite set model prediction direct power control method for a single-phase three-level rectifier. The method comprises the following steps: carrying out SOGI conversion on alternating current side voltage and current of the single-phase three-level rectifier and output voltage of the rectifier to respectively obtain two-phase orthogonal rotating vectors; calculating to obtain active power and reactive power according to the rotation vector; performing finite control set model prediction control through the calculated active power and reactive power and the rotating vector output by the SOGI, circularly traversing the switching state vector, and predicting the active power and reactive power rate at the next moment and the voltage difference between the upper capacitor and the lower capacitor at the direct current side; and finding out an optimal switching state through cost function calculation to control the three-level rectifier. According to the invention, faster dynamic response can be realized, and the method is especially suitable for a system with transient load disturbance; the FCS-MPC is easy to add system constraints, so that the robustness to power grid fluctuation and load fluctuation is higher; and the influence caused by uncertain factors such as external interference and model errors is reduced.

The invention discloses a variable frequency motor load testing device and method, and relates to the technical field of variable frequency motor testing, and the device comprises a motor testing installation platform, a fastening T-shaped bolt, two variable frequency speed regulation asynchronous motors of the same model, a drum-shaped coupler, two inverters, a rectifier, a three-phase voltage regulator, a frequency converter and an intermediate DC link. According to the invention, two frequency conversion speed regulation asynchronous motors of the same model are coaxially connected, and the power generation electric energy of the accompanying test motor is fed back to an intermediate direct current link through an inverter, so that the cyclic utilization of the electric energy and the dual-motor structural design are realized, complex load equipment does not need to be configured, and the fixed asset investment is reduced; for motors of different models, only corresponding accompanying test motors need to be replaced, the universality is improved, through voltage and current monitoring in an intermediate direct current link and motor rotating speed and torque parameter collection, and by combining a multi-dimensional performance evaluation model, precise evaluation of the motor load performance is achieved, the test efficiency is improved, and the strict test requirements are met.

System and method for controlling synchronous rectification. For example, a system for controlling synchronous rectification includes: a first control-signal generator configured to generate a first control signal; a second control-signal generator configured to receive the first control signal for a first switching cycle and generate a second control signal for a second switching cycle based at least in part on the first control signal for the first switching cycle, the first switching cycle preceding the second switching cycle; and a driver configured to receive the first control signal and generate a drive voltage based at least in part on the first control signal; wherein the second control-signal generator is further configured to: process information associated with the first control signal; determine a first time duration when the first control signal remains at a first logic level during the first switching cycle.

The invention discloses a three-phase shift frequency modulation control method and system suitable for an SS compensation wireless power transmission system, and belongs to the field of wireless power transmission, and the method comprises the steps: achieving the minimum reactive ZVS of all switching tubes of a primary inverter and a secondary rectifier in a system steady state through the real-time adjustment of an inter-bridge external phase shift angle delta and a switching frequency f; closed-loop adjustment of wide output voltage gain is realized through PI control of an inner phase shift angle gamma 2 between bridge arms of the rectifier; through system voltage gain derivation, parameter scanning and least square fitting, an optimal efficiency working curve gamma1 = f (gamma2) is obtained so as to realize real-time tracking of the highest efficiency working point under each working condition of the system. The four control freedom degrees of phase shift angles gamma 1, gamma 2 and delta and the switching frequency f are fully and reasonably utilized, the minimum reactive ZVS of all switching tubes of the system, system wide output voltage gain adjustment and efficiency optimization are achieved, and introduction of an extra power hardware link is avoided.

The invention discloses a three-phase hybrid rectifier model predictive current control method based on a variable exponential sliding mode. An inner ring active rectifier adopts a rapid optimal three-vector model predictive controller; the inner ring passive rectifier adopts a three-order extended state observer-model prediction controller; and a voltage outer loop adopts variable exponential reaching law sliding mode control. According to the method, the variable exponential reaching law sliding mode control can effectively restrain violent buffeting caused by large gain. The fast optimal three-vector model predictive controller can determine the optimal vector combination through only two times of optimization, so that the calculation complexity is greatly reduced. According to the input voltage observation method based on the third-order extended state observer, the number of used sensors is reduced, and meanwhile the input current quality is improved. The research of the method has important significance for improving the reliability of the industrial equipment power supply.

The invention discloses a multi-line electric energy quality management and power flow transfer device and a control method, the device comprises a first regulation and control module, a second regulation and control module and a shared direct current bus, and the first regulation and control module and the second regulation and control module are of a vertically symmetrical structure; the two regulation and control modules are the same in structure, a primary winding of a three-winding transformer is connected with a medium-voltage alternating-current bus, a wire outlet end of a first secondary winding of the three-winding transformer is connected with a first load through a secondary winding of a first series transformer which is connected in series, and a primary winding of the first series transformer is connected with an alternating-current end of a first three-phase inverter; a wire outlet end of a second secondary winding of the three-winding transformer is connected with an alternating current end of the three-phase rectifier; the medium-voltage alternating-current bus is connected with a second load through a secondary winding of a second series transformer which is connected in series, and a primary winding of the second series transformer is connected with the alternating-current end of the second three-phase inverter. According to the invention, the increasingly complicated power quality requirements under multiple working conditions in the power distribution network facing multi-feeder decoupling regulation and control and mutual assistance are met.

A flyback converter to receive an input voltage and provide an output voltage is provided, and may include a transformer having a primary winding and secondary winding, a primary switch coupled to the primary winding, a synchronous rectifier device coupled to the secondary winding, and a secondary side control circuit to turn on the synchronous rectifier device by outputting a control signal at a first amplitude, subsequently modify the control signal to maintain a voltage across the synchronous rectifier device substantially constant until a predicted time that precedes a current in the synchronous rectifier device reaching substantially zero, subsequently turn off the synchronous rectifier device based on the voltage across the synchronous rectifier device reaching substantially zero, and subsequently turn on the synchronous rectifier device by outputting the control signal at a second amplitude, before the primary switch is turned on. The second amplitude is less than the first amplitude.

A modular and scalable AC / DC substation transforms AC voltage to DC voltage for driving a high-voltage and high-current load, such as a heavy work machine. Sized to fit within a standard high-cube ISO shipping container, the substation includes a main transformer attached at a center of a rectangular base with a pair of controlled rectifiers positioned on the base downstream from the main transformer, aligned parallel to a lateral axis of the base, and substantially symmetrical to a longitudinal axis of the base. The arrangement of these components on the base, together with lowpass filters and switchgear, achieves high power density for the substation, provides balanced mass for stability during shipment and placement, and helps protect personnel from accidental electrical arcing.

The invention discloses a single-phase voltage stabilizing device and a control method and system thereof. Compared with a traditional single-phase full-bridge PWM rectifier and a single-phase full-bridge inverter, the single-phase voltage stabilizing device has the advantages that one bridge arm is reduced, the device cost is lower, fewer devices are needed, fault nodes are correspondingly reduced, and the reliability is higher. The problem of control coupling of a grid-connected input side and an inverter output side is caused due to the fact that one bridge arm is shared, the inverter output side voltage is given to be associated with a grid side, the phases of the inverter output side voltage and the grid side are synchronized, then pulses of the shared bridge arm are naturally decoupled, and the output sinusoidal voltage is obtained. Meanwhile, due to the full-bridge PWM rectification control mode adopted by the grid-connected input side, the grid-side power factor can be 1, and the grid-side current is sinusoidal, so that green grid connection of the device is realized; the inverter output side tracks the network side voltage and introduces the direct current bus voltage as negative feedback, so that the stability of the output voltage is ensured, the stable single-phase voltage output is finally obtained, and the quality of the power supply electric energy in the substation is improved.

The invention belongs to the technical field of power electronics, and relates to a SiC device three-level six-switch split topological rectifier control method and system. A q-axis instruction current is generated according to a power grid voltage phase angle and a square wave voltage phase angle obtained after conversion and phase locking of the three-phase power grid voltage and the square wave voltage, and a d-axis instruction current generated according to given and actual DC bus voltages; generating a three-phase voltage modulation signal according to the instruction current, the power grid voltage phase angle, and the power grid voltage and the power grid current under the two-phase rotating coordinate system, converting the three-phase voltage modulation signal into a voltage modulation signal under a two-phase static coordinate system, and generating a large sector number according to the converted voltage modulation signal; generating a three-phase modulation wave according to the translated voltage modulation signal under the two-phase static coordinate system, and generating a driving signal according to a comparison result of the three-phase modulation wave and a set carrier, and NAND logic and a large sector number of the comparison result. The alternating current zero-crossing distortion is effectively reduced, the sine degree of the current waveform is high, and the current quality is high.

The invention provides an overvoltage transient suppression method and system for an automobile generator rectifier and a medium, and relates to the technical field of rectifiers, and the method comprises the steps: carrying out the dynamic continuous data collection of an automobile generator through a transient data collection device, and obtaining an output voltage waveform; a load rejection identification mechanism is introduced to identify and analyze the output voltage waveform, and a real-time load rejection event is obtained; triggering an active protection circuit based on the real-time load throwing event, and generating a real-time protection control decision; and performing transient suppression on the rectifier according to the real-time protection control decision. The technical problems that in the prior art, overvoltage protection of an automobile generator rectifier is slow in response speed and low in protection precision, and the overvoltage transient state cannot be effectively restrained are solved. The technical effects of accurately identifying and responding to the overvoltage event and improving the timeliness and effectiveness of overvoltage transient suppression of the automobile generator rectifier are achieved.

The invention provides a multi-path vibration energy collection device, and the device comprises a mass block which can generate relative movement under the excitation effect; the piezoelectric cantilever beams are arranged on the two transverse sides of the mass block and used for responding to high-frequency micro-amplitude vibration energy; the permanent magnet assembly is fixed in the moving direction of the mass block and is matched with the induction coil to realize magnetoelectric energy conversion; the piezoelectric cantilever beam is connected with the bridge rectifier and the thyristor threshold trigger circuit 1, and the permanent magnet assembly is connected with the bridge rectifier and the thyristor threshold trigger circuit 2 to form a double-independent energy collection channel. The method has the following advantages: (1) a path orthogonal decoupling design is adopted, so that a structure and energy dual-independent acquisition path is realized; (2) the energy conversion efficiency is improved based on a coupling response mechanism of mass block inertia driving; and (3) a thyristor threshold triggering mechanism realizes micro-energy efficient conversion, and the output is stable and reliable.

The invention discloses an on-line monitoring and early warning method for a bus capacitor of an electric driving system, and belongs to the field of electric driving systems. The electric driving system sequentially comprises an isolating circuit, a full-wave bridge rectifier, a bus capacitor bank, an inverter, an actuator and a capacitance online testing device; the capacitor online testing device comprises a relay, a load resistor, a voltage acquisition module, a current acquisition module and a master control calculation unit. When the electric drive system is idle, a load resistor is connected to construct a test path, and current and voltage signals are collected; disconnecting a test path, constructing a degradation characterization quantity of multi-index information fusion through time-frequency domain feature extraction, and constructing an equal-length time interval sequence degradation curve; and the TCN-BRU-GRU combined prediction model carries out trend feature learning and training on the degradation curve. According to the method, waveform fitting and local and global data feature capturing of non-equal-interval time sampling are achieved, trend prediction of bus capacitor performance degradation is achieved, early warning is conducted before failure of the bus capacitor, and safe and reliable operation of an electric drive system is guaranteed.

The invention provides a direct-current bearing capacity safety and stability domain evaluation method considering various transient characteristic quantities, which comprises the following steps of: when an inversion side has a fault, obtaining direct-current transmission power under the fault according to a system constant parameter and a wind-fire output ratio; according to the transmitting end transient overvoltage, the rectifier transmission electric quantity, the synchronous machine voltage, the transmitting end equivalent reactance and the thermal power output proportion, voltage constraint is obtained; according to the initial mechanical power, the equivalent reactance of the sending end, the maximum equivalent mechanical power and the steady-state active power of the synchronous machine, obtaining direct-current allowable reduction power; based on the stability domain coordinate system, a voltage stability domain is obtained according to voltage constraint, a power angle stability domain is obtained according to the thermal power reactance ratio and the direct current allowable drop power, a frequency stability domain is obtained according to the direct current transmission power under the fault, and the intersection of the three is solved to obtain a safety stability domain for evaluating the direct current bearing capacity. According to the method, the safety and stability domain graph is obtained from the three angles of transient overvoltage, transient power angle and transient frequency, and visualization of the direct-current bearing capacity is achieved.

The embodiment of the invention provides an uninterruptible power supply, a control method of the uninterruptible power supply, related equipment and a system, and relates to the technical field of electric power. Comprising a bypass switch and a DC / AC inverter, and the bypass switch is used for responding to the first control signal to be switched on, so that an alternating current power supply provides active power for a load through the bypass switch; the DC / AC inverter is in an inversion state in response to the second control signal, obtains energy from the DC energy storage equipment, and provides active power of the first set power for the load, so that the active power provided by the AC power supply for the load is smaller than the second set power. According to the uninterruptible power supply provided by the scheme, a rectifier part in a traditional uninterruptible power supply framework is omitted, only the inverter and the static bypass are included, the size of the uninterruptible power supply is reduced, and the equipment cost is reduced. Meanwhile, the direct-current energy storage equipment and the alternating-current power supply simultaneously provide active power for the load after passing through the DC / AC inverter, and peak load shifting of the power of the power grid side is achieved.

The invention relates to the technical field of wireless charging, in particular to a wireless charging system and an application method, and the system comprises m inverters, m-1 RIITs and transmitting coils at a GA end, n first rectifiers at a VA end, RIITs corresponding to n-1 first rectifiers, q second rectifiers, RIITs corresponding to q second rectifiers and receiving coils. The output ends of the n first rectifiers are connected in parallel and are used for outputting electric energy to the high-voltage battery; and the output ends of the q second rectifiers are connected in parallel and are used for outputting electric energy to the low-voltage battery. The high-voltage battery and the low-voltage battery supply energy through the receiving coil at the VA end, the charging mode can be changed by setting the working state of the rectifier, and decoupling control over charging of the high-voltage battery and the low-voltage battery is achieved. According to the invention, the size and cost of the charging structure of the VA end can be effectively reduced, and different levels of power requirements can be met by adjusting the number of inverters and rectifiers.

The invention discloses a topological structure of a single-phase isolation type integrated vehicle-mounted charging system without an electrolytic capacitor and a control method of the topological structure, the system multiplexes a driving motor stator winding on the basis of an open winding driving system of an electric vehicle, and when the system is switched from a driving operation mode to a charging operation mode, the driving motor stator winding is switched to the charging operation mode. An open winding permanent magnet motor driving system is reconstructed into an isolated AC / DC converter without an electrolytic capacitor through a change-over switch, the isolated AC / DC converter comprises a synchronous rectifier, a dual-active-bridge converter and an active filtering device, phase shifting is controlled through matching of transmission power and network side input power, power factor correction is achieved, and power factor correction is achieved through winding inductive current control. According to the vehicle-mounted power battery integrated vehicle-mounted charging system, the inherent secondary power pulsation is filtered out to realize active filtering, and the torque pulsation suppression of a multiplexing motor winding is realized through a magnetic flux balance method, so that the vehicle-mounted power battery integrated vehicle-mounted charging system with an isolation charging characteristic is obtained, the integrated design of a driving charging function is realized, and the reliability and the safety of the integrated charging system are improved.