212 results about "H bridge" patented technology

The invention discloses a secondary ripple optimization method based on star cascade H bridge injection three-time zero sequence voltage. The method comprises the following steps: acquiring real-time voltage and current data of a system, performing dynamic harmonic analysis on the acquired data, generating a harmonic compensation signal, and generating an optimized control signal; constructing a multi-objective optimization model based on the optimized control signal and pre-stored system parameters, solving the model to obtain a Pareto optimal solution set, and selecting an optimal cubic zero-sequence voltage parameter from the Pareto optimal solution set; based on the optimal cubic zero-sequence voltage parameters, constructing a system dynamic model, constructing an adaptive prediction controller, generating an optimal control sequence, and performing closed-loop feedback adjustment; the ripple suppression effect is evaluated, the ripple suppression proportion is calculated by comparing the secondary ripples before and after the third zero-sequence voltage is injected, and the control parameters are dynamically adjusted according to the result. And the adaptability and precision of harmonic analysis are greatly improved. The problem that secondary ripples rise when the star cascade device compensates reactive power is effectively solved.

The invention relates to a hybrid supercapacitor energy storage type converter based on an H bridge and an operation method thereof, and the energy storage type converter comprises an upper bridge arm part and a lower bridge arm part. Each of the upper bridge arm part and the lower bridge arm part comprises three bridge arms, and each bridge arm is formed by connecting n H-bridge sub-modules and a bridge arm inductor in series; the upper bridge arm part is connected with a direct current bus, and the lower bridge arm part is connected with a grounding wire; the H-bridge sub-module comprises four switch elements and an energy storage unit, the energy storage unit is a hybrid super capacitor, the four switch elements form an H-bridge structure, and the hybrid super capacitor is connected to the two ends of the H-bridge structure in parallel. According to the invention, the dual functions of energy storage and current conversion in the AC-DC interconnected power grid can be realized under the cooperation of the control strategy, and various operation requirements in different scenes can be met.

The invention discloses an information energy equipment operation reliability evaluation method and system and electronic equipment, and relates to the field of power system reliability determination. According to the method, the Foster thermal resistance model is adopted to determine the junction temperature of the selected device in the information energy equipment, so that the average junction temperature and the junction temperature fluctuation are obtained. Adopting a Coffin-Manson-Arrhenius model to determine the number of failure cycles of the selected device based on the average junction temperature and junction temperature fluctuation so as to determine the degree of damage caused by the set number of junction temperature stress cycles; determining the fault rate of the selected device based on the damage degree, and obtaining the fault rate of the H bridge + DAB combination unit; the fault rate of the half-bridge arm can be obtained on the basis of the fault rate of the H-bridge + DAB combination unit, and the fault rate of the rectification subsystem can be accurately obtained under the condition of considering the bridge arm inductance fault rate of the half-bridge arm, so that the reliability of the digital battery energy storage system can be simply and effectively analyzed.

The invention belongs to the technical field of integrated circuits, and particularly relates to a stepping motor current control method and device. The control circuit is used for an H-bridge motor driving circuit, the four switches of the H bridge control the working state of the motor under the control of the driving signal, and in one PWM period, the four switches of the H bridge are controlled to enable the average current of the load to be equal to the set current. According to the stepping motor current control method provided by the invention, the load average current in a PWM period can be completely equal to the set current, and the error of the angle position of the stepping motor is reduced. The invention also provides a stepping motor control device for correspondingly realizing the attenuation mode.

The invention provides a positive and negative current detection circuit for an H bridge, the positive and negative current detection circuit for the H bridge comprises a voltage boosting unit, a voltage following unit, a voltage selection unit and a current conversion unit, the voltage boosting unit amplifies a first terminal voltage and a second terminal voltage of a to-be-detected switch tube; isolation is carried out through a voltage following unit, a target detection voltage to be detected currently is determined through a voltage selection unit, finally, the target detection voltage is input to a first end of a load switch tube through a current conversion unit to generate a detection current, and a controlled end of the load switch tube is connected with a controlled end of a to-be-detected switch tube. And the working current of the to-be-detected switch tube can be calculated through conversion of the detection current.

The invention discloses an energy storage EMS cooperative control method and system based on fault ride-through and dynamic reconstruction, and relates to the technical field of monitoring analysis, and the method comprises the steps: collecting power grid operation state parameters and energy storage system core data, and the power grid operation state parameters comprise a power grid voltage deviation value; the power grid voltage deviation value is compared with a preset threshold value, when the power grid voltage deviation value exceeds the preset threshold value, a multi-energy cooperative power distribution strategy is started, power support is provided, in the power support process, the series-parallel topology of the energy storage system is dynamically reconstructed through the IGBT matrix switch group, and after dynamic reconstruction, the power support is provided for the energy storage system. The DC link voltage is adjusted through the H-bridge converter group; and in the fault recovery stage, monitoring the recovery condition of the operation state parameters of the power grid, and when the voltage deviation of the power grid is within a normal range, gradually reducing the power support strength, and switching to a conventional operation mode according to a preset sequence to realize the cooperative control of the energy storage EMS. The method has the effect of improving the cooperative control efficiency.

The invention relates to an adjustable manual zero-crossing loop topology for assisting on-off of a direct-current circuit breaker. The pulse current can be flexibly adjusted under the working condition that the current amplitude of a main loop changes greatly, so that the on-off operation of the circuit breaker is assisted. The topological structure comprises a thyristor H bridge for controlling the current direction, and a discharge branch circuit connected in parallel at two ends of a direct current circuit breaker, wherein the branch circuit is formed by connecting a plurality of groups of capacitors and reactors in parallel. In the on-off process of the direct-current circuit breaker, the corresponding thyristors and the discharge switches are controlled to be switched on according to the amplitude of current in a main loop, the capacitor releases charges, and pulse current opposite to the current in the main circuit is generated through the electric reactor, so that the direct-current circuit breaker is assisted to complete on-off operation. According to the topological structure, the number of the input capacitors can be selected according to the amplitude of the main loop current, so that the reverse current matched with the main loop current is generated, and the switching-on and switching-off success rate of the circuit breaker is improved.

The invention discloses a power grid simulator simulation line impedance characteristic control method based on a cascaded H bridge, belongs to the technical field of power grid simulator control, and is suitable for a line impedance characteristic simulation system. The control method comprises the steps of firstly calculating active power and reactive power of a power grid simulator, then calculating through a VSG algorithm to obtain an output voltage instruction, and finally adding a virtual complex impedance based on generalized second-order differential on the basis of an original voltage and current double-closed-loop feedback control system to realize a simulation function of system line impedance. The generalized second-order differential function keeps the phase lead compensation differential effect on a specific frequency range, and eliminates the inherent high-frequency noise amplification effect of a traditional differential function. According to the control method, the dynamic performance of the system can be effectively improved, the output signal ripple is small, and the control speed is high.

The invention discloses an H-bridge motor driving chip based on a segmented current driving technology, which belongs to the technical field of H-bridge motor driving chips, and comprises an H-bridge output stage circuit which consists of four LDMOS (laterally diffused metal oxide semiconductor) and is used for bearing high-voltage and large-current output of a power stage power supply, the high-side driving circuit is used for converting a high-side tube logic control signal from the logic control part into a switch tube driving signal with certain driving capability in a high-side tube power supply domain; the low-side driving circuit is used for converting a low-side tube logic control signal from the logic control part into a switch tube driving signal with a certain driving capability in a low-side tube power domain, and logic control is used for converting the switch tube driving signal into a switch tube driving signal with a certain driving capability according to input signals of PWM and DIR pins and detection signals of a state detection circuit and a protection circuit in an internal driving circuit. And a logic control signal for controlling four switching tubes of the H bridge is generated.

The invention relates to a full-detail modeling large cascade H bridge application real-time simulation method and system, and the method comprises the steps: carrying out the equivalent segmentation of a large cascade H bridge system topology into a plurality of equivalent circuits, replacing the segmented cascade H bridge topology with a controlled voltage source, and measuring the current of the controlled voltage source as feedback; a power grid main circuit is wholly replaced by a controlled current source, and voltages at two ends are measured as feedback; a circuit breaker is added in a main circuit topology, bypass switches are added in a cascaded H-bridge topology, and a logic control program is designed to control on and off of each switch; the divided equivalent circuits respectively run in the FPGA of each simulator, and the logic control program runs in the CPU of the simulator; and data interaction is carried out between the simulators through optical fiber communication. Compared with the prior art, the method can achieve the precise simulation of each working condition of the large-scale cascaded H bridge system, and achieves the full-physical IO interaction controller hardware-in-loop testing of the large-scale cascaded H bridge application of full-detail modeling.

The invention relates to the technical field of power conversion, and particularly discloses a modulation method and system of a converter, equipment and a medium. The converter comprises at least two H bridges and a multi-winding high-frequency isolation transformer. The modulation method of the converter comprises the following steps: setting modulation parameters; on the basis of the modulation parameter, modulating the converter by using a preset modulation strategy; wherein the set modulation parameters are as follows: different duty ratios and different out-shift ratios are respectively set for the first half cycle and the second half cycle of each switching cycle during modulation of the converter, and phase-shift zero-voltage sequences with different duration proportions are respectively added when the first half cycle and the second half cycle of each switching cycle are ended; therefore, the equivalent switching frequencies of the first half period and the second half period of each switching period are reduced by different proportions. By adopting the method and the device, when modulation input parameters change, the delay of power transmission is small, the precision is high, and in addition, the method and the device are simple and easy to implement, strong in robustness, strong in practicability and high in light load efficiency.

The invention relates to the technical field of electronic circuits, and provides a driving circuit for reducing overshoot voltage during switching-on and switching-off of a relay, which comprises an H-bridge driving circuit module and a control module. The H bridge is composed of four MOS tubes, the drain electrodes of the first MOS tube and the third MOS tube are connected with the positive end of a power supply, the source electrodes of the second MOS tube and the fourth MOS tube are grounded, the source electrode of the first MOS tube and the drain electrode of the second MOS tube are connected with the first coil end of the relay, and the source electrode of the third MOS tube and the drain electrode of the fourth MOS tube are connected with the second coil end of the relay. The control module inputs control signals to the grid electrodes of all the MOS tubes, and four working modes of keeping, forward pull-in, reverse pull-in and follow current discharge are achieved. The action stability of the relay can be improved, the service life of the relay can be prolonged, and circuit energy consumption and electromagnetic interference are reduced.

The invention discloses an electromagnetic transient modeling simulation method and system for a cascaded H-bridge converter. The method comprises the following steps: respectively calculating a capacitance accompanying circuit and an inductance accompanying circuit of an H-bridge unit; dividing the operation state of the half-bridge circuit in the H-bridge unit, and determining an on-off state table of the half-bridge circuit according to the operation state; based on the capacitance accompanying circuit and the on-off state table, respectively establishing a step length average on-off model of the H-bridge unit in a normal state and a detailed on-off model of the H-bridge unit in an abnormal state; calculating a first Thevenin equivalent circuit based on a step length average switch model; calculating a second Thevenin equivalent circuit based on the detailed switch model; based on the first Thevenin equivalent circuit, the second Thevenin equivalent circuit and the inductance adjoint circuit, a Norton equivalent circuit of the cascaded H bridge arm is calculated; determining a bridge arm current based on a Norton equivalent circuit of a cascaded H bridge arm; and calculating a direct current voltage and a diode voltage of each H-bridge unit based on the bridge arm current.

The invention discloses a three-phase energy storage converter dynamic parameter modulation method and a related device thereof, and the method comprises the steps: configuring a modulation strategy of a grid side 3-1MC matrix converter as a current space vector modulation strategy, configuring a modulation strategy of a DC side H bridge as a phase shift modulation strategy, introducing a modulation duty ratio coefficient # imgabs0 # as a modulation parameter, and carrying out the phase shift modulation of the DC side H bridge; the modulation parameters are reduced to modulate a duty ratio coefficient # imgabs 1 # and an input reference current phase # imgabs 2 #, and the technical problems that in an existing modulation method of the AC-DC matrix converter, the modulation parameters are too many, all the parameters are difficult to coordinate through closed-loop control, no parameter can be used for closed-loop control, and meanwhile coordination control over the primary side and the secondary side is difficult to achieve are solved. On the basis, the waveform of a switching signal of the grid-side 3-1MC matrix converter is improved, so that during voltage commutation and current commutation of the grid-side 3-1MC matrix converter, power switch tubes connected in parallel with body diodes with opposite current directions in the grid-side 3-1MC matrix converter are kept on, and the soft switching characteristic of the power switch tubes is realized.

The present invention discloses a STATCOM system and a control method for a cascaded H-bridge without electrolytic capacitors, belonging to the field of power electronic control. The system comprises: a three-phase power grid, a three-phase reactive load, a filtering inductor and a three-phase cascaded N Buck multiplexing type H-bridge, N≥2; the Buck multiplexing type H-bridge comprises: an H-bridge composed of switch tubes S1-S4, a decoupling inductor L r , two film capacitors C d and C r , C r Passing by L r The midpoint of the second bridge arm of the H bridge is connected to form a bidirectional Buck circuit, and the bidirectional Buck circuit and the second bridge arm of the H bridge realize switch tube multiplexing; the midpoint of the first bridge arm of the H bridge is connected to the midpoint of the second bridge arm of the previous H bridge, and the three phases are connected in star shape. In the present invention, the bidirectional Buck circuit performs active power decoupling on the one hand, and the fluctuating power on the DC side of the H bridge is transmitted to the L r Transfer to auxiliary capacitor C r , thereby eliminating the double frequency fluctuation of the voltage on the DC side of the H-bridge, realizing the replacement of electrolytic capacitors with film capacitors, and at the same time assisting the first arm of the H-bridge to complete the power conversion on the AC and DC sides, thereby improving the power density and reliability of the device.

The present application relates to a kind of power distribution network ground parameter and grounding transition conductance online identification method, this method utilizes the neutral point voltage during the single-phase ground fault of power distribution network and the compensation current information injected by active inverter (active inverter in abstract drawing is taken as an example with cascaded H bridge), combined with recursive least square method and limit approximation idea, obtain the online measurement formula of power distribution network ground capacitance, ground resistance, grounding transition conductance, simultaneously introduce variable forgetting factor strategy on the basis of recursive least square method, improve the anti-interference ability of algorithm.The method of the present application can realize the integration of active inverter parameter measurement and arc extinction, using the ground parameter and grounding transition conductance information of online identification, adapt to line operating condition change and improve the arc extinction effect under the ground fault of power distribution line change, quickly judge the moment when ground fault disappears, reduce the overvoltage risk of non-fault phase equipment caused by long time input of active inverter during arc extinction.

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.

A distributed ice melting device topological structure suitable for an ultra-high voltage power transmission line comprises a plurality of ice melting sub-modules arranged in a distributed mode, and each ice melting sub-module comprises a single-turn coupling transformer, a metal oxide voltage limiter, a bypass switch, a filter, an H-bridge current converter and a direct-current capacitor. A primary winding of the single-turn coupling transformer is directly formed by split sub-conductors of the ultra-high voltage power transmission line, and a secondary winding of the single-turn coupling transformer is electrically connected with other parts of the ice melting sub-modules, so that the ice melting sub-modules are connected in series on the split sub-conductors of the power transmission line in a distributed manner; the H-bridge current converter is electrically connected with the direct-current capacitor, and the direct-current capacitor provides smooth direct-current voltage for the H-bridge current converter; the filter is connected in series with the H-bridge current converter, the bypass switch is connected in parallel with the H-bridge current converter, and the metal oxide voltage limiter is connected in parallel with the line side output end of the ice melting sub-module; and the ice melting sub-modules adjust the current of the corresponding split sub-conductors by changing the equivalent impedance of the ice melting sub-modules, so that accurate ice melting of the ice-coated split sub-conductors is realized, and the overall current and the transmission power of the power transmission line are kept unchanged. The technical problem to be solved by the invention is to provide the distributed ice melting device topological structure suitable for the ultra-high voltage power transmission line, and the technical problem that the existing ice melting technology cannot realize accurate ice melting and non-power-cut operation on an ice coating section on the ultra-high voltage power transmission line is solved. And normal transmission of the line is affected due to overlarge capacity demand, line overcurrent or incapability of three-phase synchronous ice melting.

The invention discloses a motor driving circuit, a circuit board and an electric tool, and relates to the technical field of electronic circuits. The circuit comprises a control module, a level conversion module, a buffer module, a driving module and an H-bridge module, the control module is connected with the level conversion module, the level conversion module is connected with the buffer module, the buffer module is connected with the driving module, and the driving module is connected with the H-bridge module; wherein the buffer module is used for transmitting a control signal to the driving module in a delayed manner; and the driving module is used for determining a driving voltage for the H-bridge module according to the driving signal and avoiding common-state conduction of the H-bridge module. Transmission of the control signal is delayed through the buffer module, and then the control signal is converted into the driving voltage for the H bridge module through the driving module according to the control signal, so that simultaneous conduction of an upper tube and a lower tube of a bridge arm on any side of an H bridge is effectively avoided, short circuit of a power supply is prevented, power transistors serving as the upper tube and the lower tube are protected, and the stability of the motor driving circuit is improved.

The utility model provides a drive circuit with chopping and current limiting functions and a stage lamp, comprising an ILIMIT pin, an external pull-down resistor arranged on the ILIMIT pin; the output end of the H bridge is connected with a load; the first input end of the control logic circuit is connected with the ILIMIT pin, and the driving output end of the control logic circuit is connected with the H bridge; the control logic circuit comprises a calculation circuit, a current detection circuit, a comparison circuit and a chopper circuit, the ILIMIT pin serves as the input end of the calculation circuit, the input end of the comparison circuit is connected with the output end of the calculation circuit and the output end of the current detection circuit, and the input end of the chopper circuit is connected with the output end of the comparison circuit and the output end of the current detection circuit. The driving circuit provided by the utility model has a current chopping and current limiting function so as to prevent the output current of the H bridge from infinitely increasing, and surge current can be effectively limited without damaging a chip and a load during the starting or transient period of the load.

The application discloses an electromagnetic field cancer treatment circuit, wherein a central processing unit is connected with a power supply part, a sampling part and a magnetic field control unit respectively, the power supply part comprises a high-voltage power supply, a current source, an H bridge and a protection circuit, wherein the input of the high-voltage power supply, the input of the current source and the input of the H bridge are connected with the output of the central processing unit, the output of the H bridge is connected with the input of the protection circuit, and the output of the protection circuit is connected with the high-voltage power supply and the central processing unit respectively; the sampling part comprises an ADC, an amplification circuit and a sampling electrode, wherein the sampling electrode collects signals at the carrier of the H bridge output electric stimulation, and the signals are output to the central processing unit after being amplified by the amplification circuit and the ADC; the magnetic field control unit comprises a motor drive and an angle sensor, and both are connected with the central processing unit; and the rotation angle of the motor drive is adjusted according to the angle collected by the angle sensor. The application can adjust the voltage, the current, the frequency and the time accurately, and can realize the closed-loop feedback electric field cancer treatment circuit.

A kind of permanent magnet direct drive type medium-high voltage high-power wind power converter and control method, belong to power electronics technical field.The wind power converter adopts H bridge midpoint clamping type five-level converter topology, wherein wind generator side is five-level midpoint clamping type H bridge converter, grid side is three three-phase three-level midpoint clamping type grid-connected converter, its DC side is connected to wind generator side converter, grid side is connected to 66kV or higher voltage grid through isolated four-winding power frequency step-up transformer.The topology structure can improve wind generator voltage to 8.5kV, and can be used in 20MW and above power level wind power system.Compared with traditional wind power converter, it has the advantages of high rated voltage, less power device, no need for device or converter parallel, large single machine capacity, simple cable twisting, small cable loss, good harmonic characteristic, high fault tolerance, simple structure, easy to control, etc., and has important application prospect in medium-high voltage high-power offshore system.

The invention discloses a rotary excitation current control circuit, which belongs to the field of automatic control systems and mixed signal integrated circuits, and is characterized in that current flowing through an H bridge must flow through a resistor Rshunt, an amplifier circuit A amplifies voltage at two ends of the resistor Rshunt, a peak detection circuit detects the maximum voltage within a period of time, and the peak detection circuit detects the maximum voltage within a period of time. The ADC quantizes peak voltage in a period of time and quantizes temperature voltage transmitted by the temperature sensor in another period of time, the peak voltage quantized by the ADC adjusts the amplitude of sine waves through a PID algorithm, so that the duty ratio of SPWM waves is changed, connection or disconnection of M1, M2, M3 and M4 is controlled after H-bridge driving, the rotating excitation current peak value is controlled, in addition, the ADC quantizes the temperature voltage in another period of time, and the rotating excitation current peak value is controlled. The real-time temperature is sent to the digital control circuit, and the digital control circuit sends a proper control code to each module according to the current temperature, so that each part in the system is not influenced by the temperature as far as possible.

The utility model relates to the technical field of H-bridge drive circuits, and discloses a high-reliability H-bridge dead-zone generation circuit, which comprises two AND gates for preventing two MOS (Metal Oxide Semiconductor) transistors on the same side of the circuit from being switched on at the same time; the exclusive-OR gate can distinguish input signal directions and output response control signals; the Schmitt trigger is used for converting the curve waveform into a PWM (Pulse Width Modulation) square wave signal and inhibiting noise and interference in an input signal; the RC time delay circuit is connected with the Schmitt trigger and is used for realizing signal delay; the two AND gates comprise a first AND gate and a second AND gate; the first AND gate and the second AND gate are electrically connected with the exclusive-OR gate, and the exclusive-OR gate and the first AND gate are electrically connected with the Schmitt trigger; according to the utility model, the formation of dead zone time is realized through RC time delay and Schmidt characteristics, the condition of circuit damage caused by simultaneous conduction of the H-bridge drive circuit in the working process is avoided, the hardware cost is lower, and the reliability is higher than the reliability realized by software.

The application provides a H-bridge motor driver with adjustable same-bridge interlocking dead time, which has the advantages of small circuit loss, no same-bridge arm conduction of the H-bridge circuit, small product volume and adjustable dead time function.

The invention discloses a bus constant-current driving circuit of a two-phase hybrid stepping motor and a control strategy of the bus constant-current driving circuit, and belongs to the technical field of stepping motor driving and control. The circuit comprises a current sampling module, an operational amplifier circuit, a filter, an embedded processor and an H-bridge gate drive circuit. The current sampling module collects a low-voltage side bus current signal and converts the current signal into a voltage signal; amplification processing and filtering processing are sequentially carried out through an operational amplifier circuit and a filter; the embedded processor calculates the actual bus current based on the processed signal, then calculates the total duty ratio opening coefficient of the on-off of the bus, distributes the current to the A-phase winding and the B-phase winding according to the current electrical angle, and outputs a corresponding PWM (Pulse-Width Modulation) control signal; and the H-bridge gate drive circuit respectively controls power transistors in the A-phase H bridge and the B-phase H bridge according to the PWM control signal. According to the bus constant-current driving circuit of the two-phase hybrid stepping motor and the control strategy of the bus constant-current driving circuit, the circuit complexity and cost can be reduced, step loss oscillation of the motor is avoided, and constant-torque stable operation is achieved.

The utility model provides a driving circuit with a plurality of driving chips connected in parallel and a stage lamp, comprising a plurality of driving chips, the output ends of which are connected with the same load; each driving chip comprises a control logic circuit and an H bridge, the output end of the control logic circuit is connected with the H bridge, and the two output ends of each H bridge are connected with the load after being connected in parallel; and the control logic circuit is used for controlling the internal current direction of the H bridge and controlling the on-off of the H bridge. According to the utility model, a large-current load is driven by a plurality of small-sized driving chips, so that the current requirement of the load is met.

The present invention relates to a static VAR compensator and a control method based on model prediction. Based on the improved topology of the static VAR compensator, the control method based on model prediction predicts the switching coefficients of the two bridge arm switches of the H bridge in the power submodule according to the electrical parameters after obtaining the electrical parameters of the DC side and the AC side of any power submodule in the static VAR compensator, and controls the bridge arm switches of the H bridge according to the switching coefficients. Based on this, based on a circuit structure different from that of a traditional static VAR compensator, linear control is performed by a control method based on model prediction, thereby avoiding the overmodulation problem caused by the linear superposition of the AC side and the DC side in the static VAR compensator.

The application discloses a kind of data-driven power distribution methods and systems for H bridge module health degree balance. It belongs to the technical field of power system automation. The steps are as follows: first, based on current, voltage and switch state, a thermoelectric coupling model of IGBT and capacitor is constructed to estimate dynamic temperature; Then introduce sliding window and extreme pairing mechanism, extract the thermal cycle load sequence of key devices; Then, combined with Coffin-Manson and Arrhenius model, the life damage is calculated; Normalize and time decay processing to construct module health index. On this basis, a power optimization allocation model with health awareness is constructed, TD3 reinforcement learning algorithm is introduced to realize strategy training and online deployment, forming a closed-loop control mechanism from state perception, decision optimization to scheduling execution. This method provides an intelligent and adaptive scheduling solution for multi-module energy storage systems, improving the intelligent level of system health management.

A system, device, and method to convert power and drive electric machines, for instance electric motors advantageously employs an open winding inverter comprising of an H bridge per machine phase and an arrangement of switches in the DC supply to dynamically reconfigure the motor winding between two operating modes in order to deliver higher performance and efficiency of an electric machine over wide operating speed range, all while reducing silicon usage.