547 results about "Current sharing" patented technology

The invention discloses a storage battery capacity attenuation trend prediction method, and belongs to the technical field of storage battery prediction. By collecting voltage, current and temperature data of each monomer in real time and combining historical capacity attenuation and internal resistance growth data, the method identifies a voltage and capacity difference value, evaluates cyclic stress non-uniform distribution, and determines a current sharing proportion and a load unbalance degree. Identifying an abnormal mode of new battery overload and aged battery deep discharge, constructing a mixing abnormal working condition identification mode, if the unbalance degree exceeds the standard, adaptively adjusting the charging and discharging time and the current switching frequency, establishing a load balance control framework, predicting the capacity attenuation rate and the residual cycle index of each monomer, and determining the capacity matching degree and the life matching degree; finally, a comprehensive residual life estimation value and a credibility interval are generated through fusion; the performance balance of the mixed battery pack is remarkably improved, the overall service life is prolonged, and the method is suitable for real-time monitoring of a battery management system.

The invention discloses a parallel current sharing precision improvement method and system under multiphase heterogenous input. The method comprises the following steps: constructing a current sharing bus signal network; a PI controller is adopted to output a current-sharing adjustment amount VCS to carry out current-sharing loop control, the output amplitude limiting range of the current-sharing loop is set to be 0-+ VCSMAX, and VCSMAX = 2.5% * rated output voltage VOUTNOM; a digital delay compensation technology is added to ensure synchronization of a current-sharing bus network sampling signal and an output current sampling signal; performing moving average filtering on the current-sharing bus network sampling signal and the output current sampling signal after delay compensation by adopting a short-time domain fixed window filtering parameter; a bias error symmetric amplitude limiting mechanism is introduced, a set bias value delta Ihys is subtracted from the original current sharing error, delta Ierrbias = delta Ierr-delta Ihys is used as an effective adjusting signal, and + / -delta Ihys amplitude limiting is applied to delta Ierrbias; an asymmetric integral coefficient adjustment strategy is implemented, when the VCS needs to be increased, a low-speed adjustment coefficient Kup is adopted, when the VCS needs to be reduced, a rapid adjustment coefficient Kdown is adopted, and Kdown is larger than or equal to 2Kup; the steady-state high current sharing precision and the parallel current sharing capability can be realized.

The invention discloses a circuit and a method for realizing current sharing through master-slave parallel connection, and the method is characterized in that a master machine and a plurality of slave machines are connected in parallel, and are respectively connected to a current sharing control bus through an isolation chip, a TTL and differential mutual conversion unit and an information gating switch in sequence, thereby forming a parallel current sharing circuit; comprising a host issuing current reference circuit and a processing circuit after a slave receives a current reference signal from the host. After a plurality of instrument power supplies are connected in parallel, a user sets a master-slave parallel mode on a front panel of the power supplies and selects a master computer, and other computers are slave computers; when a plurality of power supplies work in parallel, the host issues a current reference signal to the current sharing control bus through the current reference generation circuit, and the slave outputs a corresponding current value according to the current reference signal issued by the host. One of a plurality of power supply modules can be randomly selected as a main module, the flexibility is high, the stability is good, and the power supply has the characteristics of simplicity in wiring and control, low transmission loss of control signals, difficulty in interference of the control signals, balanced output control of all the power supply modules and the like.

The invention discloses a control method of an interleaved parallel bidirectional DCDC converter. A circuit of the converter comprises three pairs of MOSFET switch tubes, three inductors and an output capacitor. The phase difference of PWM waves of the three pairs of MOSFET switch tubes is 120 degrees, and the phase difference is used for effectively reducing current ripples through staggered complementation of currents of all phases. Double closed-loop control is adopted, the DSP chip is responsible for current inner loop control, and the FPGA chip is responsible for voltage outer loop and power outer loop control. The current sharing precision is high, through flexible configuration of multiple proportionality coefficients and zero points, input fluctuation and load abrupt change interference can be accurately restrained, oscillation is avoided, stable output is ensured, and when load abrupt change or mode switching is carried out, output can be rapidly adjusted, transition time can be shortened, and overshoot can be reduced. And high dynamic response and strong robustness of the system are realized, so that complex and changeable application requirements are met.

The invention relates to an IGBT parallel current sharing control circuit and method for turn-off transient current change rate detection, and the circuit employs a PCB Rogowski coil probe to carry out the non-contact detection of the turn-off current change rate of a parallel device, thereby accurately judging the non-current sharing characteristic of the parallel device. The problem of integrated design of a traditional detection scheme in large-current and high-power-density application is effectively solved; meanwhile, by designing a current change rate peak holding circuit, the holding time of a peak signal is remarkably prolonged, and the performance requirement on the ADC sampling rate is greatly reduced; a reset branch is additionally arranged for the peak holding circuit, and the peak output value in the last period is zeroed in the turn-on transient state by using a driving signal, so that the charge accumulation effect is effectively eliminated, and the sampling precision of the system is guaranteed; the regulation and control part of each parallel branch only needs to be additionally provided with two passive elements including the control switch and the capacitor, current sharing control can be achieved by adjusting the access time of the bypass branch, the structure is simple, cost is low, and good popularization applicability is achieved.

The embodiment of the invention provides a current sharing control method and an AC-DC conversion system, the current sharing control method is applied to a current sharing controller, the current sharing controller is used for controlling the working state of an AC-DC converter, the AC-DC converter comprises at least two rectification units, and the at least two rectification units adopt a combination of a bridge topology structure and an LLC resonant tank; comprising the steps of determining a target adjustment phase according to absolute values of three-phase input voltage instantaneous values of at least two rectification units; according to the current sampling values of the at least two rectification units, a target duty ratio of a target adjustment phase in each rectification unit is determined, and the target duty ratio is used for indicating adjustment of the voltage gain of the LLC resonant tank; and adjusting the duty ratio of the control signal of the switching tube in each rectification unit according to the target duty ratio of the target adjustment phase in each rectification unit. According to the embodiment of the invention, the gain of the LLC is changed by adjusting the pulse width of the switching tube control signal in the rectification unit and adjusting the amplitude distribution of the input voltage of the resonant tank, so that the output current of the LLC is controlled, and the purpose of current sharing is achieved.

The invention relates to the technical field of multi-column lightning arresters, in particular to a multi-column lightning arrester parallel matching method, which comprises the following steps of S1, performing aging screening and energy tolerance testing on zinc oxide resistor discs of the same batch; s2, measuring the direct-current reference voltage Uref of the resistor discs, the leakage current I0 under 0.75 Uref, the impact residual voltage UL under the lightning wave and the operation residual voltage US under the operation wave one by one; s3, screening the resistor discs for three times; and S4, high-low matching is carried out by taking the operation residual voltage US as a main matching basis, so that the operation residual voltage deviation of each column of series resistor disc group is smaller than a first preset value, and the direct current reference voltage numerical value deviation is smaller than a second preset value. The strict screening process ensures the consistency of the performance of the resistor discs, and the reasonable grouping mode makes the electrical performance of each column resistor disc group more balanced, thereby achieving the effect of improving the operating wave endurance capability and the current sharing characteristic of the multi-column lightning arrester, and reducing the probability of faults caused by uneven current distribution of the MOV.

The invention provides a power supply circuit and a dual-plane redundant power supply system, which can be applied to the technical field of power supply current sharing. The current sharing control circuit comprises an output voltage generation module used for converting an output current provided by a power supply circuit to a load into an output voltage; the current-sharing control module is used for generating a current-sharing control voltage for adjusting the reference voltage of the far-end sampling point according to a comparison result obtained by comparing the current sensing voltage with the current-sharing voltage of the current-sharing bus; the feedback voltage generation module is used for generating a feedback voltage according to the far-end feedback voltage, the near-end feedback voltage and the resonant voltage; and the voltage regulation module is used for regulating the reference voltage according to the current sharing control voltage, comparing the feedback voltage with the regulated reference voltage to obtain error voltage, and regulating the output voltage of the power supply circuit according to the error voltage.

The invention belongs to a DC-DC boost conversion technology, and discloses an ultrahigh-gain photovoltaic converter for a high-voltage charging system. According to the ultra-high gain photovoltaic converter, a boost unit is additionally arranged in a traditional two-phase interleaving Boost converter, the first end of the boost unit is connected with the midpoint of one bridge arm of the traditional two-phase interleaving Boost converter, and the second end of the boost unit is connected between an intermediate capacitor and an output diode. The ultra-high gain photovoltaic converter provided by the invention can realize more than 20 times of boost under the condition of a relatively small duty ratio, and has the advantages of automatic current sharing of an input inductor, small input current ripple, and small voltage stress of a switching tube and a diode.

The invention provides a current sharing control method and an AC-DC conversion system. The method comprises the steps that the method is applied to a current sharing controller, the current sharing controller is used for controlling the working state of an AC-DC converter, the AC-DC converter comprises at least two rectification units, and the at least two rectification units adopt the combination of a bridge topology structure and an LLC resonant tank; the method comprises the following steps: acquiring current sampling values of at least two rectification units; according to the current sampling values of the at least two rectification units, a target phase shift angle of each rectification unit is determined, and the target phase shift angle is used for indicating the duration when the input voltage of the LLC resonant tank is in a 0-level state; and according to the target phase shift angle of each rectification unit, controlling a control signal of a target switch tube in the bridge topology structure of each rectification unit to perform phase shift. According to the embodiment of the invention, the input voltage of the LLC resonant tank is 0 level by adjusting the phase shift angle of the switching tube in the rectification unit, so that the output current of each rectification unit is controlled, and the effect of current sharing of the outputs of the plurality of rectification units is achieved.

The invention aims to provide a lithium iron phosphate battery pack parallel current sharing control method and system, and aims to solve the problem of non-uniform current distribution caused by dynamic change of internal resistance of lithium iron phosphate batteries in the prior art, and the technical problems that a traditional PI controller is slow in response speed, and current impact and voltage fluctuation are easily generated during load sudden change. According to the technical scheme provided by the invention, by establishing a virtual impedance adaptive adjustment mechanism based on depth model predictive control and combining with the adaptive PID controller optimized by reinforcement learning, accurate balance control on the current of each parallel battery pack is realized, and meanwhile, the method has fault detection and reconstruction capabilities and ensures stable operation of the system under various working conditions.

The invention belongs to the field of power electronic technology and new energy grid-connected control, and particularly relates to a cooperative control system and method for parallel operation of multiple new energy inverters. The method comprises the following steps: firstly, establishing a small signal model of an inverter parallel system, and analyzing dynamic characteristics of the system under power disturbance; secondly, realizing power decoupling and current sharing control based on a frequency-power droop characteristic; furthermore, coordinated operation of multiple energy sources such as photovoltaic energy and energy storage is realized by monitoring the phase of the direct-current bus voltage and the alternating-current side voltage in real time; the method has high engineering applicability, and high-speed real-time communication between parallel units is not needed; the virtual impedance parameters Rv and Lv have clear physical significance and are easy to preliminarily set according to line parameters; the calculation of the dynamic matching self-adjusting module is linear operation, the requirement for the computing power of a processor is low, and integration and implementation on an existing inverter control platform are facilitated.

The invention discloses a power supply modular combination method and system based on a standardized interface. The method comprises the following steps: step 1, collecting data through a sensor; 2, the central control hub fuses data and establishes a four-dimensional collaborative model; 3, the MOSFET driving circuit carries out adjustment according to a control instruction of the central control hub; and 4, the AI prediction current sharing module predicts the load change trend of the current power supply system and the performance degradation condition of each module through a built-in machine learning model, and dynamically adjusts the current distribution of each module based on the prediction result in combination with a target current value in an instruction, thereby realizing the current distribution of the power supply system. The system comprises a central control hub, a sensor unit, an AI prediction current sharing module and an MOSFET drive circuit. The method has the advantages that dynamic impedance matching and current sharing control closed loop are achieved, AI prediction current sharing is achieved through a machine learning model, output impedance and current distribution of a power module are accurately controlled, load changes are dynamically adapted, and current sharing precision and system stability are improved.

The invention provides a sensorless parallel current-sharing control method and device for a dual active bridge converter, and the method comprises the steps: building the corresponding relation between the phase-shifting offset of DAB except a main DAB and the circuit parameters of DAB except the main DAB, and the circuit parameters and phase-shifting offset of the main DAB according to a power balance condition when all DAB circuit parameters are not matched; the IPOP dual-active bridge converter starts to operate in a common phase shift phase ratio stage, the phase shift phases of the DABs are equal, a disturbance component is applied to the phase shift phase ratio of the main DAB, and a transmission power expression of the DABs except the main DAB and the main DAB in a new steady state is obtained; calculating the phase shift offset of the DAB except the main DAB relative to the main DAB; then outputting a current based on a phase shift offset amount of DABs other than the main DAB relative to the main DAB; current sharing can be well realized when the system is in a forward mode and a reverse mode; current sharing can be realized without a current sensor.

The invention belongs to the technical field of emergency power supply, and particularly relates to a multi-power-supply complementary linkage integrated emergency power supply device which is characterized in that after the device is started, a multi-dimensional sensing module acquires load historical curves, real-time power, environmental parameters and state parameters such as residual capacity and internal resistance of each power supply in a multi-type power supply module in real time; the core control module predicts future load and power supply output capability based on the data, generates a linkage instruction according to a weighting algorithm, and regulates and controls a single-power-supply independence mode, a multi-power-supply time-sharing energy complementation mode or a parallel current sharing mode. The self-adaptive power conversion module adapts to power supply output characteristics according to instructions and supplies power through an AC / DC interface of the integrated output module, the load classification and identification unit synchronously optimizes filtering parameters, the power supply state sensing unit monitors aging and limits power through a health degree model, the environment sensing unit triggers safe switching, and the modular power supply supports plug and play. And the remote communication unit realizes cloud collaborative management.

A power converter circuit is disclosed. The power converter circuit includes: a first regulated power converter having a first input and a first output; and a second regulated power converter having a second input and a second output. The inputs are configured to be coupled to a source, and the outputs are configured to be coupled to a load. The inputs are coupled in series; the outputs are coupled in parallel. The first regulated power converter is a regulated hybrid converter configured to transfer energy from the first input to the first output through at least one magnetic component and at least one capacitive component.

The invention discloses a trapezoidal wave current soft switching method of an interleaving DC-DC converter, which is used for a two-phase interleaving bidirectional DC-DC converter based on a coupling inductor and a multi-phase interleaving converter thereof, and is characterized in that an inductive current adopts a trapezoidal wave mode, so that the converter works in an approximate critical conduction mode; a fixed switching frequency control or hybrid control method is adopted, so that the device can work in a Buck mode and can also work in a Boost mode. The method for realizing the soft switching is characterized in that the parasitic capacitance or the external resonant capacitor of the switching tube is discharged to be zero under the resonance action of the inductor and the capacitor in the dead zone time when the upper bridge arm switch and the lower bridge arm switch are alternately switched on, so that the zero-voltage switching-on of all the switching tubes is realized. And each phase current sharing control is adopted in the multi-phase interleaving parallel topological structure. According to the invention, the problems of large current peak value and high turn-off loss of a traditional triangular wave current mode are solved, the output ripple current is reduced, a soft switching method is provided, the switching loss is reduced, and the conversion efficiency of the converter is improved.

The invention relates to the technical field of hydrogen production power supplies, and discloses a 5.7 MW high-power hydrogen production power supply multi-machine parallel current sharing algorithm, which effectively improves the current sharing precision of a 5.7 MW high-power hydrogen production power supply multi-machine parallel system through droop control and PI regulation current sharing control improved by combining a master-slave architecture, and can control the current imbalance degree of each parallel module within + / -3%. The method is far better than a traditional method, ensures that each power supply module uniformly shares a load, gives full play to the overall power output capability of the system, improves the hydrogen production efficiency, has a rapid dynamic response characteristic, can rapidly adjust current distribution under the condition of sudden change of the load, enables the system to recover a stable current-sharing state within 20ms, avoids equipment damage caused by current impact, and improves the hydrogen production efficiency. Reliable operation of the system is guaranteed, and complex and changeable load requirements in the hydrogen production process are met.

The application relates to the technical field of power electronics, and discloses a press-contact type IGBT device packaging structure optimization method and system. The method comprises the following steps: constructing an equivalent model of a press-contact type IGBT device; constructing a differential algebraic equation for uniformly describing the equivalent model of the press-contact type IGBT device and circuit port variables; converting the differential algebraic equation into a nonlinear algebraic equation group through time domain discretization, and constructing an iteration matrix with a global state vector as a derivation object according to a solving mode of the nonlinear algebraic equation group; performing low-dimensional subspace projection on the iteration matrix based on a Krylov subspace, and combining residual minimization to solve a linear subproblem of the iteration matrix, so that current uniformity characteristic results of the press-contact type IGBT device are obtained; and the packaging structure of the press-contact type IGBT device is optimized based on current density distribution reflected by the current uniformity characteristic results. The application can improve the current uniformity and operation reliability of the system.

The application discloses to the technical field of power supply, specifically to a parallel current-sharing redundant power supply system and a control method, first, all parallel power supply modules and loads, environment original operation parameters are collected, and noise reduction filtering and compliance verification are carried out; then, system operation condition is identified, parameter drift is judged, hierarchical load and module health state are judged, harmonic characteristics are extracted, and faults and circulating current are judged; then, current-sharing control strategy is matched, aging drift compensation coefficient is generated, output control parameter is dynamically corrected, load fluctuation is pre-judged, and pre-adjustment parameter is generated; based on this, the application significantly reduces the current-sharing lag and output voltage fluctuation problem caused by load mutation, so that the system always maintains stable current-sharing output in complex dynamic scenes such as frequent start-stop production line and pulse rectifier, and meets the industrial-grade power supply demand of high dynamic response requirement.

The application discloses a cooling triangular unit with transversely adjustable current equalizing device, which comprises a cooling triangular unit and a transversely adjustable current equalizing device, wherein the cooling triangular unit comprises left cooling columns, right cooling columns and an air inlet louver, and the transversely adjustable current equalizing device comprises a vertical fixing shaft, an upper horizontal slide, a lower horizontal slide, a roller shutter and a vertical moving shaft, and the transversely adjustable current equalizing device is vertically arranged along a vertical central symmetry plane of the cooling triangular unit. The cooling triangular unit with transversely adjustable current equalizing device can horizontally and transversely adjust the roller shutter along the slide according to the environmental wind speed and direction, and the roller shutter can be transversely adjusted to the outermost side of the cooling triangular unit at a small environmental wind speed, thereby playing a role of air side current equalization of the cooling triangular unit; the roller shutter can be transversely adjusted to the innermost side at a large environmental wind speed and a large air inlet inclination, thereby reducing the air inlet resistance of the cooling triangular unit and reducing the adverse effect of additional ventilation resistance of the current equalizing device; and the application has the characteristics of small resistance and intelligence.

The utility model provides an H-bridge parallel re-topology, which comprises an H-bridge formed by N groups of IGBTs and N corresponding current-sharing inductors, each group of H-bridges has the same structure and is controlled by an independent current-sharing loop, the midpoint of the left bridge arm of each group of H-bridge is connected with one end of the corresponding current-sharing inductor, the other end of each current-sharing inductor is connected with one end of a capacitor C1, and the other end of the capacitor C1 is connected with the other end of the capacitor C1. The other end of the capacitor C1 is connected with the midpoint of the right bridge arm of each group of H bridges; and two ends of each group of H bridges are connected in parallel with bus voltage. According to the H-bridge parallel re-topology and the current sharing control loop thereof provided by the utility model, the defect of multi-path parallel connection of IGBTs is avoided, and current multiplication output of H-bridge parallel connection is realized.

The invention provides a switching power supply LLC interleaving current sharing control system and method. The system comprises a switching power supply conversion circuit, a controller and a logic operation circuit. Wherein the controller is used for obtaining driving signals of a plurality of switch tubes in the first full-bridge resonant conversion branch and the second full-bridge resonant conversion branch according to an output voltage set value and an output current and voltage sampling value of the interlaced full-bridge LLC resonant converter module; the driving signal is used for controlling the working state of the switching tube so as to realize current sharing of the first full-bridge resonant conversion branch and the second full-bridge resonant conversion branch. According to the current value sampled by the two branches, the current-sharing pulse which only affects the turn-off signal of the switching tube can be generated, in the current-sharing adjusting process, the deviation of 90 degrees of MOS tube driving at the same position of the two resonant full bridges can be maintained without complex setting of a controller or addition of an additional complex circuit, and the current-sharing effect of the two resonant full bridges is improved. And a good effect of small interleaving parallel output ripple is realized.

The invention relates to the technical field of power flow control, and particularly provides a DSSC device dynamic current sharing performance test system and method based on multi-device parallel connection, and the system comprises a valve layer control board, a unit controller, and a plurality of drive boards. The valve layer control panel is used for issuing a test control pulse command to the unit controller; the unit controller is used for generating a driving PWM pulse signal corresponding to the test control pulse command and issuing the driving PWM pulse signal to a driving board; the driving board is used for converting the received driving PWM pulse signal into an electric PWM signal for driving a power device, and sending the electric PWM signal to the power device in the half-bridge unit controlled by the driving board; wherein a control object of one driving board is a power device in one half-bridge unit. According to the technical scheme provided by the invention, the dynamic current sharing property of a plurality of power devices which are connected in parallel can be verified by a simple and efficient method under the condition that the sub-module outputs a large current.

The utility model discloses a power semiconductor device, the power semiconductor device comprises a copper-clad ceramic substrate and at least three semiconductor chip sets, the semiconductor chip sets are electrically connected with the copper-clad ceramic substrate through bonding wires, and the at least three semiconductor chip sets are sequentially arranged along a first direction; the semiconductor chip set comprises an upper bridge arm circuit, a lower bridge arm circuit and a first connecting terminal, and the upper bridge arm circuit and the lower bridge arm circuit are sequentially arranged in the second direction; the upper bridge arm circuit and the lower bridge arm circuit comprise two semiconductor chips which are connected in parallel, and the semiconductor chips of the upper bridge arm circuit and the lower bridge arm circuit are connected with the first connecting terminals respectively. Each of the at least three semiconductor chip sets of the power semiconductor device comprises the upper bridge arm circuit and the lower bridge arm circuit, and each of the upper bridge arm circuit and the lower bridge arm circuit comprises the two semiconductor chips which are connected in parallel, so that the consistency of the at least three semiconductor chip sets is good, the parasitic parameters of the power semiconductor device can be reduced, and the reliability of the power semiconductor device is improved. The present invention improves current equalization of a power semiconductor device.

The invention discloses a modular lunar surface direct current micro-grid system architecture design method supporting dynamic expansion. The method comprises the steps that firstly, a DC-DC converter in a direct current micro-grid is divided into an interface type DC-DC converter directly connected with a load and a power generation end and a network construction type DC-DC converter supporting energy routing; an input-series and output-parallel modular expansion strategy based on voltage-sharing and current-sharing control is provided, and dynamic balance of input-series voltage sharing and output-parallel current sharing is realized, so that the targets of power mutual assistance and long-range networking operation in progressive evolution of the lunar base energy system are adapted. Through staged architecture evolution and standardized interface design, the modular control concept is emphasized, the reliability and networking interoperability of the system are remarkably improved, meanwhile, progressive access of lunar photovoltaic, energy storage and variable loads is compatible, an extensible technical framework is provided for lunar exploration energy supply, and the application range of the system is widened. The method has important engineering value and reference significance for construction of a deep space power system.

The invention discloses a multi-module parallel system, a current sharing control method thereof, control equipment and a storage medium, and relates to the technical field of electrical control, and the current sharing control method of the multi-module parallel system comprises the steps: obtaining a three-phase total current value of the multi-module parallel system and a circulation current value of each target module; each target module comprises N-1 modules in all N modules in a working state in the multi-module parallel system; according to the three-phase total current value and the circulating current value of each target module, generating a current-sharing modulation signal of each target module; and controlling each target module to operate based on the current sharing modulation signal of each target module. According to the invention, the current sharing control of the multi-module parallel system can be realized simply and conveniently at low cost.

The invention relates to the technical field of parallel power supply control, and provides a parallel power supply method and system based on dynamic current sharing and redundant backup, and the method comprises the steps: forming a global view of a load; performing normalization processing on the real-time load distribution matrix, and extracting a current load proportion vector of each power supply module; calculating a driving correction coefficient of each power supply module based on the load proportion vector by using a distributed consensus algorithm; broadcasting the driving correction coefficient to each power supply module through a communication network, and adjusting the duty ratio of a pulse modulation signal to form a balanced driving signal; monitoring the change of a load proportion vector by adopting a continuous consistency evaluation mechanism, identifying a power supply module whose uniform distribution deviation exceeds a threshold value, and generating an isolation instruction; starting an isolation sequence according to the isolation instruction; the system comprises a load distribution matrix construction module, a duty ratio adjustment module and an isolation instruction generation module. According to the invention, the technical bottlenecks of the traditional parallel power supply system in the aspects of precision, reliability and real-time performance are effectively overcome.

The application discloses a kind of multi-phase hybrid DC-DC converters of inductance current automatic current sharing, including multiple phase units, including switching network, flying capacitor, energy storage inductor and sampling capacitor in each phase unit;Switching network is composed of NMOS pipe that is connected with each other;Flying capacitor is connected between the output end of first NMOS pipe and the input end of last NMOS pipe in switching network;Sampling capacitor is connected between the intermediate tap of switching network in each phase unit and the intermediate tap of switching network of next phase unit;One end of energy storage inductor is connected with switching network, and the other end is connected with the common output end of converter.The application is modularized by being designed to phase unit, so that DC-DC converter also supports arbitrary expansion phase, so as to realize the purpose of being expandable to arbitrary phase number and inductance current, flying capacitor voltage automatic balancing, with wide application prospect.

The utility model provides a multi-group chopper circuit parallel current sharing control system, and belongs to the technical field of current control. The multi-group chopper circuit parallel current sharing control system comprises chopper circuits, a switch selection module, an impedance detection module, a current control module and a main control module, the input end of the chopper circuit is connected with a DC power supply, the control end of the chopper circuit is connected with the main control module, the output end of the chopper circuit is connected with the input end of the switch selection module, the first output end of the switch selection module is connected with the input end of the current control module, and the second output end of the switch selection module is connected with the first end of the impedance detection module. The control end of the switch selection module is connected with the main control module; the output end of the current control module is used for connecting electric equipment, and the control end of the current control module is connected with the main control module; the second end of the impedance detection module is used for connecting electric equipment, and the control end of the impedance detection module is connected with the main control module. The stability of the power supply system can be improved.