2799 results about "Full bridge" patented technology

The invention provides a single-stage AC / DC converter for realizing high-frequency isolation power factor correction, and relates to the technical field of converters. The AC-DC converter comprises an AC module with a transformer, an H4 full-bridge module, a third switch and a switch group satisfying a bidirectional current path. The alternating current module with the transformer comprises a first inductor, an intermediate capacitor, a second inductor and the transformer. The first end of the switch group satisfying the bidirectional current path is connected to the common end of the first inductor and the intermediate capacitor, and the second end is connected to the common end of the external AC power supply and the transformer. When the single-stage AC / DC converter works, the switch group satisfying the bidirectional current path is in complementary conduction with the third switch. Compared with equipment such as a two-stage energy conversion configuration, the AC / DC converter provided by the embodiment of the invention is equivalent to an isolated single-stage SEPIC-PFC converter for one-stage energy conversion, the circuit structure is simple, the control is easy to realize, a one-stage architecture is adopted, and the efficiency is improved.

The invention relates to the technical field of hybrid inverters, and discloses a hybrid inverter supporting reactive compensation and a control method thereof, and the hybrid inverter comprises a DC input unit, a three-phase full-bridge inversion unit, a grid-connected switching unit, a signal acquisition unit and a digital control unit. The direct current input unit comprises a photovoltaic interface, a battery interface and a direct current bus and is used for converging photovoltaic and energy storage electric energy; the three-phase full-bridge inversion unit is composed of a power device and an LCL filter and converts direct current into alternating current. The grid-connected switching unit comprises a static switch and an isolation transformer and is used for controlling power grid connection; the signal acquisition unit detects voltage and current signals; and the digital control unit judges a grid-connected mode or an off-grid mode according to the signal, calculates a reactive current reference value and generates a PWM (Pulse Width Modulation) control signal so as to realize reactive compensation control in the grid-connected mode and the off-grid mode. According to the invention, reactive power compensation capability is provided in both grid-connected and off-grid operation modes, and stable operation of the inverter in various working conditions is ensured.

The invention discloses a variable-frequency reconfigurable wireless electric energy transmission system and a parameter design method, and relates to a wireless electric energy transmission system and a parameter design method. The invention aims to solve the problems that the existing wireless power transmission technology is difficult to maintain approximately constant power transmission in the face of wider coupling coefficient fluctuation, and the system control complexity is higher at the same time. The system comprises a full-bridge inverter circuit, a primary side compensation network, a coupling coil, a secondary side compensation network and a rectification filter circuit. The input end of the full-bridge inverter circuit is connected with a direct-current voltage source UD, the output end of the full-bridge inverter circuit is connected with the input end of the primary side compensation network, the output end of the primary side compensation network is connected with the primary side input end of the coupling coil, and the secondary side output end of the coupling coil is connected with the input end of the secondary side compensation network. The output end of the secondary side compensation network is connected with the input end of the rectification filter circuit; the output end of the rectification filter circuit is connected with a battery load Ro. The invention belongs to the technical field of wireless power transmission.

The invention relates to the technical field of converter starting, in particular to an LLC full-bridge converter hybrid control soft start method, comprising the following steps: selecting a hybrid soft start strategy combining down-conversion starting and PWM starting, and respectively introducing nonlinear orders of a control switch frequency decline curve in the down-conversion starting process and a duty ratio rise curve in the PWM starting process; defining a mathematical formula of the change of the switching frequency and the duty ratio along with time when two nonlinear orders are different in value; establishing a simulation model, and substituting a mathematical formula that the switching frequency and the duty ratio change along with time when the two nonlinear orders are different in value into the simulation model; performing simulation testing on the nonlinear orders with different values, extracting the maximum resonance current, and determining an order combination with the best maximum resonance current suppression effect; and performing soft start of the LLC full-bridge converter based on the determined order combination. According to the invention, the current in the soft start process can be effectively suppressed, and meanwhile, quick start and device safety are considered.

In a power conversion device, a control circuit sets an output voltage of a boost converter to a first output voltage level or a second output voltage level in accordance with a voltage corresponding to the input voltage, causes an electric current resonant converter to operate in a full-bridge mode as an operating mode when the first output voltage level has been set, and causes the electric current resonant converter to operate in a half-bridge mode as an operating mode when the second output voltage level has been set. The first output voltage level or the second output voltage level is set at a predetermined timing after the input voltage is input and a set operating mode is maintained until a process of setting the first output voltage level or the second output voltage level is reset.

The invention discloses a DAB-based two-stage DC-AC converter system, which is composed of a dual-active full-bridge DC-DC converter and a single-phase grid-connected inverter, and is characterized in that the dual-active full-bridge DC-DC converter is formed by connecting a primary side full bridge and a secondary side full bridge through a high-frequency transformer HFL and a resonance circuit composed of Cr and Lr; the single-phase grid-connected inverter comprises an inverter full bridge composed of switch tubes K1-K4 and an LCL type grid-connected filter circuit composed of inductors L1 and L2 and a capacitor C; the invention further discloses a secondary ripple suppression method and a control strategy, the pulse power of double frequency multiplication in the direct-current bus capacitor is transferred to the LC power decoupling branch through the LC passive branch connected to the middle point of the secondary side of the double active bridge, so that power decoupling is achieved, and the secondary ripple suppression in the direct-current bus voltage keeps the bus voltage stable.

The invention belongs to the technical field of semiconductor device packaging, and discloses a power semiconductor module three-dimensional stacking vertical commutation low-inductance packaging structure. The two vertical commutation structures are stacked and integrated on the same substrate; different from traditional two-dimensional packaging in which all elements are laid on a two-dimensional plane, three-dimensional stacked packaging suitable for power devices is proposed for the first time, and power loops are stacked and integrated; the magnetic fluxes of the stacked power loops are cancelled, so that ultra-low inductance (pH level) integration is realized; under the condition that the areas of the substrates are the same, the capacity of the module is doubled; meanwhile, dynamic current sharing design is considered, and one driving chip simultaneously drives eight GaN chips to realize parallel dynamic current sharing for the first time; the method is suitable for various topological structures including half-bridge structures, full-bridge structures, three-level ANPC structures and the like; the method is suitable for various packaging schemes, including PCB on DBC packaging, DBC substrate welding / sintering packaging and embedded packaging. Taking the packaging of the half-bridge module double-sided parallel PCB on DBC as an example, low-inductance, low-thermal-resistance and high-power-density integration is realized.

The invention discloses a multi-objective optimization method and system for dual active bridge circuit expansion phase shift modulation, and the method comprises the steps: calculating a voltage matching ratio, and determining an external phase shift angle ratio based on a difference value between an output voltage and an output voltage reference value; according to the voltage matching ratio and the external phase shift angle ratio, obtaining an internal phase shift angle ratio of the primary side full bridge through an offline lookup table; calculating the maximum transmission power of the dual-active bridge converter, and determining a current working mode from the six preset working modes based on the size relationship between the inner phase shift angle ratio and the outer phase shift angle ratio; generating an optimal modulation strategy through a multi-objective optimization algorithm by taking the current effective value and the current peak value as optimization objectives and combining the voltage matching ratio and the periodic parameters of the current working mode; and generating a trigger signal of each switch tube of the dual-active bridge converter. Through six-mode working area division, complete differential algorithm boundary constraint and off-line-on-line collaborative optimization, the contradiction between the current stress and the soft switching range of the converter under extended phase shift modulation is solved.

To provide a full-rotation type non-contact power transmission connector device.SOLUTION: A full-rotation type non-contact power transmission connector device includes a power supply module a full-bridge inverter module, a primary-side resonance compensation module, a full-rotation type ball connector module, a secondary-side resonance compensation module, and a full-bridge rectification module. The power supply module supplies a supply voltage required for the device. The full-rotation type ball connector module provides radial rotation between a ball head device and a ball seat device, and a receiving coil and a transmitting coil are located in the ball head device and ball seat device, respectively. The primary- and second-side resonance compensation modules include primary- and secondary-side LCC reactive power compensation modules and primary- and secondary-side coil capacitors.SELECTED DRAWING: Figure 6

The invention discloses a VSG-VDG-based autonomous control method and device for an AC-DC hybrid micro-grid interconnection converter. The equipment comprises a direct-current micro-grid, an alternating-current micro-grid and an interconnection converter connected with the direct-current micro-grid and the alternating-current micro-grid. The direct current microgrid is provided with a direct current side VDG control module which is used for controlling a direct current converter to adjust direct current power supply output by collecting internal voltage and current signals; the AC micro-grid is provided with an AC side VSG control module which is used for controlling on-off of a switching tube of a three-phase full-bridge inverter by collecting internal voltage and current signals so as to adjust AC three-phase voltage output. The interconnection converter is provided with an interconnection converter control module which is used for connecting the direct-current bus and the alternating-current bus through the bidirectional interface converter and adjusting energy balance in the subnet through bidirectional energy flow. According to the method, the robustness of the AC / DC micro-grid system is enhanced, and the fault self-healing capability of the system under extreme conditions and the transient and steady-state stability of a controlled system are improved.

The invention discloses a variable-frequency reconfigurable wireless electric energy transmission system and a parameter design method, and relates to a wireless electric energy transmission system and a parameter design method. The invention aims to solve the problem that approximately constant power transmission is difficult to maintain in the prior art for relatively wide coupling coefficient fluctuation. The system comprises a full-bridge inverter circuit, a primary side compensation network, a coupling coil, a secondary side compensation network and a rectification filter circuit. The input end of the full-bridge inverter circuit is connected with a direct-current voltage source UD, the output end of the full-bridge inverter circuit is connected with the input end of the primary side compensation network, the output end of the primary side compensation network is connected with the primary side input end of the coupling coil, and the secondary side output end of the coupling coil is connected with the input end of the secondary side compensation network. The output end of the secondary side compensation network is connected with the input end of the rectification filter circuit, and the output end of the rectification filter circuit is connected with the battery load Ro. The invention belongs to the technical field of wireless power transmission.

The invention discloses a CLLLC converter light load efficiency improvement and load expansion circuit based on variable resonant cavity regulation and control and a control method thereof. The circuit comprises a primary side full bridge, a variable resonant cavity, a secondary side rectifier and an output loop, the digital control unit detects the load in real time, and drives and switches the parallel or series capacitor branch to adjust the equivalent resonant capacitor; and the auxiliary buffer branch is used for soft start and sudden change buffer. According to the control method, capacitance is reduced during light load, efficiency is improved, capacitance is increased during heavy load, gain linearity is kept, the load range is widened, and smooth starting is achieved. The device is compact in structure and easy to control, the light load efficiency can be remarkably improved, the load application range is expanded, and the device has high reliability and good industrialization prospects.

The invention provides a construction method for combining steel box hybrid beam cable-stayed bridge cable bent tower steel anchor beams and concrete brackets, and belongs to the technical field of bridge cable bent tower construction. Tower column pouring and sectional arrangement are carried out, each section of tower column comprises two steel anchor beams, construction is carried out by firstly installing the steel anchor beams and then pouring concrete, and a tower body and a first bracket steel bar are bound; the construction method comprises the steps of bracket embedded steel plate positioning and mounting, bottom section steel anchor beam support erecting, steel anchor beam machining and transporting to a construction site, bottom section steel anchor beam lifting, positioning and temporary fixing, support heightening, tower body and second bracket steel bar binding, second steel anchor beam lifting, positioning and temporary fixing and tower body and bracket concrete pouring. In the steel anchor beam mounting stage, the transverse direction and the longitudinal direction of the main tower are measured at the same time, construction is carried out to key procedures, according to design and monitoring requirements, full-bridge linear measurement, bridge axis measurement, main tower deviation and torsion measurement are carried out, discharging holes and vibrating holes are formed, and concrete bracket quality defects caused by difficult discharging in the pouring process are avoided.

The invention discloses an inverter circuit, a maximum power tracking method thereof and energy storage inverter equipment, the inverter circuit comprises a full-bridge circuit, a transformer and a half-bridge circuit, the full-bridge circuit is connected to the half-bridge circuit through the transformer, the full-bridge circuit is connected with a photovoltaic module, and the half-bridge circuit is connected with an alternating current side; the maximum power tracking method comprises the following steps: acquiring the input power of the photovoltaic module in the current period and the input power of the photovoltaic module in the previous period, and the reference output voltage of the inverter in the first period; determining a voltage adjustment step length according to the power deviation and the voltage deviation, the power deviation being based on the input power of the current period and the previous period, and the voltage deviation being based on the input voltage of the photovoltaic module of the current period and the previous period; obtaining the reference output voltage of the current period according to the voltage adjustment step length and the reference output voltage of the previous period; and generating a driving signal according to the reference output voltage of the current period so as to control the inverter circuit. According to the invention, the maximum power point of the photovoltaic module can be tracked by the inverter circuit.

The invention discloses a high-power pulse electromagnetic sound source system with high repetition frequency and a use method thereof, and the system mainly consists of an energy storage battery, a boost module, a distributed cascade Marx module, a control module, a full-bridge load module and a distributed electromagnetic transducer. The pulse sound source system has the advantages of various functions, strong interaction capability, high power, high repetition frequency, wide sound source propagation range, intelligence, reliability and the like, and provides technical support for pulse sound source research while ensuring portability and economy.

The invention discloses a DC / DC converter reliability evaluation method and a related device, and the method comprises the steps: constructing an electrothermal coupling model of a power switch module of a Boost full-bridge boost isolation converter BFBIC combined DC / DC converter topological structure, and obtaining the power loss and junction temperature change conditions; constructing a life prediction model based on the junction temperature change condition, and calculating a failure rate in combination with a fatigue damage accumulation model; and establishing a calculation model of the outage probability of the series / parallel module based on the fault rate, and evaluating the reliability of the Boost full-bridge boost isolation converter combined DC / DC converter by using an improved reliability block diagram method. The method provided by the invention is helpful for reducing the evaluation error of the equipment reliability, and can provide data support for the construction and development of a novel power system.

An energy self-balancing flexible direct-current converter valve, a control method, and a direct-current system, which relate to the technical field of power transmission and distribution networks. The converter valve comprises three phase units, and each phase unit comprises an upper leg and a lower leg. The upper legs and the lower legs each comprise a plurality of full-bridge energy self-balancing submodules and a plurality of half-bridge energy self-balancing submodules. Each of the full / half-bridge energy self-balancing submodules is an optimized MMC submodule comprising an energy self-balancing circuit. The energy self-balancing circuit is composed of a power electronic switch and an energy dissipation resistor connected in series, and is used for dissipating surplus energy when an overvoltage early warning occurs for the capacitor voltage of the submodule. The present application, without affecting the operational logic of conventional converter valves and at low costs, can solve the technical problem of surplus power not being dissipated promptly due to faults occurring in a direct-current power transmission system in a new energy islanded ultra-long-distance direct-current delivery scenario. Meanwhile, temporary energy stored in the capacitors of the optimized MMC submodules can be fully utilized, reducing the waste generated by surplus power dissipated as heat.

The utility model discloses a power unit, a three-phase full-bridge power module, a power supply system and a vehicle. Wherein the power unit comprises an upper bridge power chip and a lower bridge power chip, a second pole of the upper bridge power chip and a first pole of the lower bridge power chip are electrically connected with an alternating current output conductive path of the power unit, and a first pole of the upper bridge power chip and a second pole of the lower bridge power chip are electrically connected with two different conductive layers respectively. The two different conductive layers are at least partially stacked and are DC input conductive paths of the power unit. According to the technical scheme, parasitic inductance in the power unit packaging structure can be reduced.

The invention discloses a vehicle-mounted bidirectional power converter which comprises a pre-stage voltage stabilization module, a pre-stage driving circuit, a post-stage driving circuit, a post-stage filtering module and an electric vehicle battery module, the pre-stage voltage stabilization module is used for balancing circuit voltage and supporting reactive power, the pre-stage driving circuit is of a single-phase full-bridge AD-DC topological structure, and the post-stage filtering module is of a single-phase full-bridge AD-DC topological structure. The front-stage driving circuit is of a half-bridge type bidirectional DC-DC topological structure, the rear-stage driving circuit is of a half-bridge type bidirectional DC-DC topological structure, the front-stage driving circuit and the rear-stage driving circuit are connected together through a direct-current voltage-stabilizing bus, the size is small, the weight is light, a front stage and a rear stage do not interfere with each other, control is easy, the rear-stage filtering module is used for restraining direct-current side second harmonics, the harmonic quantity is prevented from influencing the stability of output direct-current voltage, and the output direct-current voltage is stable. According to the converter, a corresponding control method is designed, non-inductive decoupling control and a single-phase phase-locked loop of an improved loop filter are adopted, the phase of a power grid is accurately and efficiently obtained, and the converter works stably.

The invention relates to a calculation method and device for construction tensioning force of a hybrid-composite beam cable-stayed bridge, and the method comprises the following steps: building a full-bridge finite element model, and setting the last tensioning force as a designed finished bridge cable force; constructing a target formula including a stay cable force, a main beam tangential displacement and a main tower longitudinal deviation influence matrix; calculating a bridge forming state initial value and establishing an optimization objective function; forming an iterative loop calculation system; the cable force uniformity of stay cables on the two sides of the side midspan, the stress limit values of a main tower and a main beam and the pressure reserve of a transition pier and an auxiliary pier are controlled; and finally, the tensioning force of each time in the construction process is determined. The method emphasizes the consistency of finite element simulation and on-site construction, considers the shapes of a vertical curve and a horizontal curve of the bridge and the bending effect, and is suitable for bridges with various spans and curve forms; the method can effectively consider the concrete shrinkage and creep effect, is rapid in convergence, high in efficiency and wide in application range, meets multi-parameter constraint conditions, and ensures that a finished bridge state is closed with an ideal result.

The invention relates to the technical field of direct-current power supplies, in particular to a silicon carbide material-based high-power synchronous rectification direct-current power supply and a control method thereof, and the silicon carbide material-based high-power synchronous rectification direct-current power supply comprises an input filtering module, a high-frequency inversion module, a synchronous rectification module, an output filtering module and a control module; the output end of the high-frequency inversion module is connected with the input end of the synchronous rectification module, and the high-frequency inversion module is composed of a full-bridge inversion circuit composed of SiC MOSFETs. The output end of the synchronous rectification module is connected with the input end of the output filtering module, and the synchronous rectification module comprises a topological structure in which a SiC Schottky diode and a SiC MOSFET are connected in parallel; and the control module is in signal connection with the high-frequency inversion module and the synchronous rectification module, acquires input voltage, output voltage, current and temperature parameters in real time, and controls the on-off state of each module through a driving signal. The invention has the effects of effectively reducing the power supply energy loss and improving the power supply efficiency.

The utility model provides a full-bridge LLC resonant converter control circuit, which is characterized in that a full-bridge LCC resonant converter is provided with a frequency conversion controller, a phase shift controller and a mode switching module, the input end of the mode switching module is connected with an input voltage detection module, and when the input voltage of the full-bridge LCC resonant converter is lower than a preset threshold value, the phase shift controller is connected with the mode switching module. When the input voltage of the full-bridge LCC resonant converter is larger than or equal to a preset threshold value, the variable frequency controller controls a switching tube in the full-bridge LCC resonant converter to work through switching of the switch, and when the input voltage of the full-bridge LCC resonant converter is larger than or equal to the preset threshold value, the phase shift controller controls the switching tube in the full-bridge LCC resonant converter to work through switching of the switch. The full-bridge LLC resonant converter has the advantages that the variable-frequency controller and the phase-shift controller are arranged in the control circuit at the same time, switching of control modes can be achieved based on judgment of the magnitude of input voltage and through a simple switching circuit, the full-bridge LLC resonant converter has the advantages of variable-frequency control and phase-shift control, and the problems of voltage fluctuation and instability are solved.

The invention belongs to the technical field of LLC resonant converters, and provides an efficiency optimization method of a wide-range LLC resonant converter. The method comprises the following steps: firstly, obtaining a full-bridge LLC resonant converter topology and a working area; secondly, establishing a full-time-domain equation of the full-bridge LLC resonant converter topology in an inductive low-gain output working area, and setting boundary conditions of the full-time-domain equation; then, on the basis of boundary conditions, switching tube turn-off current is calculated, and the switching tube turn-off current is combined with switching tube switching frequency to be represented as switching tube turn-off loss characteristic quantity related to the inductance coefficient, the quality factor and the normalized frequency; then, carrying out characteristic analysis on the turn-off current of the switching tube, and setting constraint conditions; and finally, on the basis of the set constraint conditions, the optimal values of the inductance coefficient, the quality factor and the normalized frequency are calculated by combining a differential evolution algorithm, so that the turn-off loss of the switching tube is minimum. According to the invention, the transmission efficiency in a low-gain mode and a high-gain mode can be improved, and the turn-off loss of the switching tube is reduced.

A control method and system for a resonant converter. The control method for a resonant converter comprises: in each switching cycle, determining a target power value on the basis of an input power control amount and a compensation amount corresponding to a bridge leg (S101); on the basis of the target power value, an input voltage, circuit parameters of the resonant converter, and the current operating mode of a full-bridge inverter module, determining a target slope control amount corresponding to a counter which corresponds to a switching transistor (S102); determining a comparison threshold on the basis of the target slope control amount, the current count value of the counter which corresponds to the switching transistor, and a DC bias voltage of a resonant capacitor corresponding to the current operating mode, wherein the counter starts counting using the DC bias voltage as an initial value in each switching cycle until the actual voltage of the resonant capacitor is equal to the comparison threshold (S103); and determining a control signal on the basis of the actual voltage of the resonant capacitor and the comparison threshold, and controlling the switching transistor on the basis of the control signal (S104).

The invention discloses a novel difference fixed-frequency boost control method suitable for resonant transformation topology, and relates to the technical field of resonant converter wide-range fixed-frequency boost control. According to the method, the switching frequency of a switching tube of a rectifier full bridge is set to be half of the switching frequency of a switching tube of an inverter side full bridge, the switching frequency of the inverter side full bridge is rated resonant frequency, a half-cycle feedback current circuit is formed, the feedback energy time is adjusted by controlling the PWM proportion of a single tube, and the output voltage of the converter is pumped up. Soft switching characteristics of part of switching tubes are inherited, wide gain of the converter on a rated frequency point can be guaranteed, the situation that tube section current is too high due to the fact that traditional frequency conversion control is in a wide under-resonance interval or a low inductance ratio is avoided, meanwhile, the problem that soft switching cannot be achieved in phase-shifting control is also avoided, and the control efficiency of the converter is improved. Meanwhile, over-wide frequency range adjustment is avoided for high-frequency application, convenience is brought to design of magnetic elements, and certain high-frequency and high-power-density application potential is achieved.

The invention discloses an isolation type split-phase inverter circuit and a control method thereof. The isolation type split-phase inverter circuit comprises an isolation DC / DC module circuit and a power frequency rectification module circuit. The isolation DC / DC module circuit comprises an input-side full bridge, a three-end transformer and two output-side circuits, an input-side winding of the three-end transformer is connected with a midpoint of a bridge arm of the input-side full bridge, and the input-side full bridge is connected with a filter capacitor C1 in parallel; two output side windings of the three-end transformer are respectively connected with corresponding output circuits through a resonance network circuit, the two output circuits are connected to a power frequency rectification module circuit through filter capacitors C4 and C5, and the negative electrode of the first output circuit and the positive electrode of the second output circuit are connected to form an interface N; the power frequency rectification module circuit comprises a rectification full-bridge circuit, and an interface L1 and an interface L2 are obtained after rectification. Through cooperative control of direct transmission of integrated topology and voltage signals, a complex parameter matching algorithm is not needed, breakthrough in structure simplification, energy conversion efficiency, control convenience, cost control and safety is achieved, and the method is suitable for various power conversion scenes.

The embodiment of the invention provides an intelligent electric precipitation system. The intelligent electric precipitation system comprises a power management module, a working condition sensing module, a dynamic optimization module and a cooperative control module, the power supply management module comprises a high-frequency power supply unit and a power-frequency power supply unit, and the high-frequency power supply unit adopts a full-bridge series-parallel hybrid resonance circuit; the working condition sensing module is configured with a distributed sensor network; the dynamic optimization module establishes a multi-objective optimization model; the cooperative control module realizes a four-level control architecture; the system realizes optimal balance of dust removal efficiency and energy consumption by collecting working condition parameters in real time and dynamically adjusting working parameters of a power supply. According to the intelligent electric dust removal system, through a hybrid power supply framework, a multi-sensor network and four-stage cooperative control, the dust removal efficiency is improved, and the equipment reliability and the intelligent level are improved.

The invention discloses a non-contact power supply three-stage control system based on series redundancy, and belongs to the field of non-contact power supply control. Comprising a power correction module, a voltage conversion module, a full-bridge inversion module, a cooperative control module, an analysis adjustment module, a monitoring switching module, a simulation maintenance module, a communication security module, a remote interaction module, an energy efficiency optimization module and a diagnosis recording module. High conversion efficiency can be dynamically kept under different loads and working conditions, energy loss is reduced, electric energy quality is remarkably improved, damage and misoperation under abnormal working conditions are prevented, high-reliability continuous power supply is achieved, PID parameters can be dynamically adjusted or direct control quantity can be generated, the system adapts to complex and changeable operating environments, and failure rate and shutdown loss are reduced.

The invention discloses a global soft switching heterogeneous direct current converter adaptive to bidirectional power requirements and an operation method thereof. The converter comprises an input side main power branch, an input side auxiliary power branch, a transformer bank, an output side reverse power full bridge and an output side forward power full bridge, the operation method comprises an energy forward transmission mode and an energy reverse transmission mode.

The invention discloses a control method of a two-stage bidirectional AC-DC converter, and relates to the technical field of two-stage bidirectional AC-DC converters, and the two-stage bidirectional AC-DC converter comprises a front-stage interleaved bridgeless PFC circuit which is used for converting an AC input voltage into a DC voltage; the back-stage bidirectional full-bridge CLLLC resonant circuit can realize zero-voltage soft switching-on and zero-current soft switching-off of a switching tube, an AC-DC part of the two-stage bidirectional AC-DC converter is an interleaved bridgeless PFC circuit, two paths of input inductive current are interleaved, so that input current ripples are greatly reduced, a power factor correction function is realized, a DC-DC part is a bidirectional full-bridge CLLLC resonant circuit, and the two paths of input inductive current are interleaved, so that the two paths of input inductive current are interleaved. The wide-range voltage regulation function can be achieved under phase shift-frequency conversion control, the two-stage bidirectional AC-DC converter can achieve bidirectional energy flow, and meanwhile the converter is provided with a high-frequency transformer so that electrical isolation can be achieved.