416 results about "Half bridge" patented technology

A kind of power device parallel type power module and capacitor charging and discharging method, power module includes two or more than pressure type power device, the two or more than pressure type power device adopts the physical form of half bridge group string upper and lower parallel;The half bridge group string of the pressure type power device is connected in parallel by silicon pile composite busbar;Each power module is provided with pneumatic short-circuit switch, in the case of multiple power module series connection, the pneumatic short-circuit switch is connected in series with all DC capacitors, and charging and discharging is carried out through the ground loop of flexible AC transmission equipment AC, DC valve side;The pneumatic short-circuit switch is connected with gas driving pipeline, and the gas driving pipeline is connected with valve-based gas pressurizing device.The power module can effectively improve the capacity of flexible AC transmission equipment, so that it has short-time frequency modulation capacity output, provides technical scheme support for new power system construction, and guarantees system safety and stability;The provided capacitor charging and discharging method can improve maintenance efficiency and enhance product reliability.

The invention discloses an active battery equalization system and method, and belongs to the field of line detection. The system comprises a monitoring module, a microcontroller, a battery pack, a switch array and a half-bridge LLC converter. The microcontroller is used for receiving the voltage sampling value and the current sampling value acquired by the monitoring module; calculating the average charge state of the battery pack and the charge state of each single battery according to the voltage sampling value and the current sampling value; comparing a difference value between the average charge state of the battery pack and the charge state of the current single battery with a preset balance threshold value, and judging whether an unbalanced battery exists or not; and under the condition that the unbalanced battery exists, the switch array is controlled to gate the unbalanced battery to the input end of the half-bridge LLC converter, and the half-bridge LLC converter is controlled to perform energy conversion, so that the unbalanced battery performs energy transmission with other batteries of the battery pack through the half-bridge LLC converter. By implementing the invention, the problems of high cost and low balancing speed in the prior art can be solved.

Systems, devices, and methods are provided for pulsed strain gauge topologies. A weight sensor assembly may comprise one or more load cells for receiving excitation pulses during a first state period of a duty cycle, sample and hold (S / H) circuitry connected to the one or more load cells that holds analog measurement signals from the one or more load cells, first filtering circuitry connected to the S / H circuitry for processing the analog measurement signals and producing a DC level signal, an amplification system connected to the filtering circuitry, for amplifying the DC level signal, second filtering circuitry connected to the amplification system for filtering power line noise, and analog-to-digital (ADC) circuitry connected to the second filtering circuitry. Examples of load cells described herein include full-bride load cells (FBLCs) and half-bridge load cells (HBLCs).

The invention discloses a gallium nitride hybrid switched capacitor voltage converter with a high step-down ratio, which belongs to the technical field of switching power supplies and comprises an input filtering module, a switched capacitor module group, a half-bridge module group and an output filtering module which are connected in sequence, the switched capacitor module group comprises a plurality of switched capacitor modules which are connected in parallel, the half-bridge module group comprises a plurality of half-bridge modules which are connected in parallel, and the switched capacitor modules and the half-bridge modules are in one-to-one correspondence and work in corresponding preset switching periods; the output filtering module comprises a plurality of output filtering inductors, and the output filtering inductors are correspondingly connected with the half-bridge modules. Through innovation of the topological structure, the buck ratio higher than that of a traditional Buck converter under the same duty ratio is achieved, input current and output voltage ripples are further improved through a multi-phase interleaving parallel control mode, wide bandgap devices are reasonably selected for the innovatively-designed topological structure, and therefore the output current and output voltage ripples are improved. And the circuit is more suitable for kilowatt-level switching power supply equipment.

The invention provides a half-bridge system, a chip and a preparation method of the half-bridge system, and relates to the technical field of power. The half-bridge system comprises an upper tube and a lower tube which are connected in sequence; the source electrode of the upper tube is connected with the drain electrode of the lower tube; hybrid bonding is arranged between the source electrode of the upper tube and the drain electrode of the lower tube, the source electrode of the upper tube and the drain electrode of the lower tube form interconnection through the hybrid bonding, and the source electrode of the upper tube and the lower tube form an inverted structure through the hybrid bonding. Direct and short-distance interconnection of the source electrode of the upper tube and the drain electrode of the lower tube can be achieved through mixed bonding, and compared with traditional bonding wires and long PCB routing, the current transmission path is greatly shortened, and parasitic inductance can be remarkably reduced. In addition, the inverted structure further optimizes the spatial layout and the connection mode between the devices, reduces additional leads and other parasitic sources, and weakens the source of parasitic inductance generation from the structural level.

A short-circuit protection circuit of a half-bridge driving chip relates to the field of short-circuit protection and integrated circuit design, and comprises a pre-driving module for generating a high-side signal and a low-side signal; the half-bridge module is driven, a high-side MOS receives a high-side signal, and a low-side MOS receives a low-side signal; the gate source hardware clamping module is used for carrying out voltage clamping on the high-side MOS when over-current of the over-ground short circuit of the high-side MOS is detected; the phase voltage short-circuit protection module is used for controlling the overcurrent time when the high-side MOS short circuit is over-current, and sending a fault signal to the logic module when detecting that the high / low-side MOS short circuit is over-current; the bus over-current protection module is used for sending a fault signal to the logic module when bus over-current is detected; and the logic module judges whether the short-circuit protection circuit enters a protection state according to the fault signal. According to the invention, the response speed and the protection mechanism are intelligently switched in real time in different overcurrent fault scenes through the three-stage protection circuit, and the circuit has the characteristics of high sensitivity, fast response speed and strong anti-interference capability.

The invention discloses an atmosphere plasma generator, which comprises a driving power supply and a spray gun, and is characterized in that the driving power supply comprises a rectifier, at least two half-bridge inverters and at least two transformers in one-to-one correspondence with the half-bridge inverters; the input end of the rectifier is connected with an AC power supply; the at least two half-bridge inverters are arranged at the output end of the rectifier in parallel; the primary side of each transformer is connected with the output end of the corresponding half-bridge inverter, the secondary sides of the multiple transformers are connected in series to form an output port, and the output port is connected with the spray gun. According to the atmospheric plasma generator, the specification requirement on a single related power device is reduced, so that higher total power output can be realized, the requirement of equipment such as the plasma generator on high voltage of several kilovolts can be met, and the controllability and adaptability of voltage output are improved. And when the power demand is increased, flexible expansion can be realized by increasing the number of the parallel modules, the whole system does not need to be redesigned, and the power expansion capability is improved.

The invention discloses an overvoltage suppression method of a resonant direct-current transformer and the resonant direct-current transformer, and relates to the technical field of power electronics. The overvoltage suppression method of the resonant direct-current transformer comprises the following steps: detecting a direct-current output voltage provided by a direct-current output port, and comparing the direct-current output voltage with an output voltage target value of the resonant direct-current transformer; and under the condition that the direct current output voltage is greater than the output voltage target value, dynamically adjusting the internal phase shift delay between the control signals of the first half bridge and the second half bridge so as to adjust the direct current output voltage to be less than or equal to the output voltage target value. According to the embodiment of the invention, the suppression cost of the light-load overvoltage of the resonant direct-current transformer can be reduced, and the reliability of the resonant direct-current transformer is improved.

The invention provides a compact type low parasitic inductance half-bridge packaging structure, which is characterized in that two ends of a main substrate are provided with a positive electrode connecting terminal and an alternating current connecting terminal, a first chip and a second chip are arranged between the two terminals, a positive electrode power electrode of the first chip is electrically connected with the positive electrode connecting terminal, and a negative electrode power electrode of the second chip is electrically connected with the alternating current connecting terminal; a positive power electrode of the second chip is electrically connected with the alternating current connecting terminal, and a negative power electrode of the second chip is electrically connected with the negative terminal; the control substrate is arranged over the two chips in a crossing mode, a first gap bridge connecting piece is arranged on the surface of one side of the control substrate, a negative power electrode of the first chip is electrically connected with the alternating current connecting terminal through the gap bridge connecting piece, and a plurality of grid connecting pieces capable of being electrified with grids of the two chips are arranged on the surface of the other side of the control substrate. The control substrate is arranged above the main substrate, so that the grid electrode of the device is arranged above the space, larger plane space occupied by the grid electrode is reduced, meanwhile, the distance between the grid electrode connecting piece and the chip grid electrode is shortened, and the overall size of the packaging structure is reduced.

The embodiment of the invention provides a method and a system for adjusting the capacitance value of a half-bridge sub-module. The method comprises the following steps: acquiring an initial capacitance value of a capacitor meeting steady-state operation voltage fluctuation constraint and dynamic response time constraint; obtaining a resistance value range of a resistor in the damping branch under the multi-condition constraint; wherein the multi-condition constraint comprises a current limiting condition constraint of the flexible direct-current power transmission system based on the initial capacitance value when a direct-current fault occurs, and a transient stability condition constraint of the flexible direct-current power transmission system when an alternating-current fault occurs; based on the resistance value range, obtaining an introduced transient voltage fluctuation range of the capacitor through simulation; obtaining a selectable capacitance value range in which the capacitance meets the transient operation condition constraint corresponding to the introduced transient voltage fluctuation range; and replacing the initial capacitance value with the capacitance value in the optional capacitance value range to obtain a target capacitance value of the capacitor. According to the invention, the engineering cost of the flexible DC power transmission system can be reduced on the basis of realizing AC / DC fault non-locking fault ride-through.

The utility model discloses an internal and external integrated trigger circuit for an excitation fuse, which relates to the technical field of new energy circuit protection, and comprises an external trigger unit, which comprises an external trigger interface, a voltage-regulator tube D5 and a signal output interface; the internal trigger unit comprises an arc ignition fuse, a pulse transformer, a half-bridge rectifier circuit and a signal output interface; the external trigger unit receives an external trigger signal through one-way conduction of a voltage-regulator tube D5, and the external trigger signal is transmitted to the igniter through the signal output interface. According to the utility model, through a double-trigger redundancy design, double insurance is formed by external active trigger and internal self-trigger. When external triggering fails, internal triggering still can independently activate the igniter through the pulse transformer and the half-bridge rectifying circuit, and the risk that protection fails when a single Pyro fuse control loop fails is thoroughly avoided. And the response time of the excitation fuse is shorter than that of a traditional hot-melt fuse, so that the diffusion risk of a short-circuit accident is remarkably reduced.

An audio amplifier that implements current mode control without the use of an explicit or separate current mode sensor is disclosed. The audio amplifier may include a pair of feedback loops that provide current from a node located before an inductor of an output filter and current from a node located after the inductor of the output filter to an integrator circuit. The integrator circuit may be formed from existing circuitry of the audio amplifier controller. Thus, current mode control can be implemented without a separate current mode sensor. Further, the audio amplifier can be implemented as a half bridge or as a full bridge design without increasing the number of operational amplifiers compared to the half bridge.

A submodule for a power converter is described. The submodule includes a first and a second power storage devices and a first stack of electronic device packages. The first stack includes a first, a second, a third, and a fourth electronic device package. A first power device and the first and second electronic device packages form a first half bridge converter, and a second power device and the third and fourth electronic device packages form a second half bridge converter.

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 invention provides a half-bridge power module and a manufacturing method thereof, a full-bridge power module and electric equipment. The half-bridge power module comprises a bottom plate; the first substrate and the second substrate are arranged on the bottom plate side by side in the second direction at intervals, the first substrate is provided with a first half-bridge unit, the first half-bridge unit comprises a plurality of wide bandgap power chips, the second substrate is provided with a second half-bridge unit, the second half-bridge unit comprises a plurality of wide bandgap power chips, and the first half-bridge unit comprises a plurality of wide bandgap power chips. The second half-bridge unit comprises a plurality of silicon-based power chips, and the first substrate is electrically connected with the second substrate. According to the half-bridge power module, the wide bandgap power chip and the silicon-based power chip are integrated in the half-bridge power module, so that the power level can be well expanded, and the switching loss and the product cost are both considered. Moreover, the manufacturing process of the half-bridge power module can be optimized, and the production efficiency of the half-bridge power module can be improved.

The invention discloses an electromagnetic transient equivalent modeling method of a semi-full hybrid MMC-SESS, and relates to the technical field of high-voltage flexible direct-current power transmission. The method comprises the following steps: obtaining a topological structure and a control strategy of the semi-full hybrid super capacitor energy storage type modular multilevel converter; according to the topology of the half-bridge sub-module and the full-bridge sub-module, basic electrical elements are determined, an equivalent model is established, and adjoint circuits of the half-bridge sub-module and the full-bridge sub-module are obtained; equivalent circuits of the half-bridge sub-modules and the full-bridge sub-modules are obtained through a nested fast solution method, and an equivalent model of the half-full hybrid super-capacitor energy storage type modular multilevel converter is obtained through series connection and superposition according to a half-full proportion; and performing simulation verification on the equivalent model. The method is simple and easy to implement, the number of the sub-modules and the voltage level can be expanded according to requirements, and compared with a detailed model, the simulation speed can be remarkably increased, the external and internal characteristics of the semi-full hybrid MMC-SESS can be accurately simulated, and system-level simulation analysis and control design of the semi-full hybrid MMC-SESS are supported.

A control method for an LLC resonant converter includes: dividing an input voltage into four voltage segments: a low voltage, a medium-low voltage, a medium-high voltage, and a high voltage, and correspondingly adopting a full-bridge PFM control mode, a full-bridge PWM control mode, a half-bridge PFM control mode, and a half-bridge PWM control mode respectively. This control method is applicable to a wide input voltage range to achieve steady-state control over an LLC resonant converter, and can maintain a high efficiency of the LLC resonant converter within the whole input voltage range and can also be used in scenarios where a wide output voltage occurs.

The present invention relates to a circuit unit (5, 7) for actuating a half-bridge circuit and to a circuit arrangement having a multiplicity of such circuit units (5, 7). The circuit arrangement is designed to take a control signal (S1, S2) for complementary switching of a first semiconductor switch (T1) and a second semiconductor switch (T2), which form the half-bridge circuit, as a basis for dynamically adapting a dead time between respective switched-on states of the first semiconductor switch (T1) and the second semiconductor switch (T2), in order to reduce a power loss of the circuit arrangement.

The application discloses a bidirectional direct current conversion device and a control method thereof. The bidirectional direct current conversion device comprises a cascaded LLC resonant converter and a half-bridge Buck-Boost converter. The control method comprises the following steps: an LLC current loop obtains an error feedback item through a first controller based on the error between a battery current instruction and a battery current sampling value; the LLC current loop obtains a feedforward quantity by multiplying the battery current instruction by a proportional coefficient; the LLC current loop superimposes the feedforward quantity and the error feedback item to obtain a half-bridge current instruction; a half-bridge current loop generates a duty cycle signal of the half-bridge Buck-Boost converter through a second controller based on the error between the half-bridge current instruction and a half-bridge current sampling value; and a PWM controller drives a switch tube of the half-bridge Buck-Boost converter according to the duty cycle signal. The method can realize fast and high-precision control of the battery current.

The utility model relates to an electromagnetic needle selection driving control circuit, a needle selector and a glove knitting machine, the electromagnetic needle selection driving control circuit comprises M first half-bridge circuits and N second half-bridge circuits, the M first half-bridge circuits and the N second half-bridge circuits are communicated to form a matrix circuit, and each cross point of a matrix is a coil; wherein the first half-bridge circuit is connected between a power supply and a first end of the coil, the second half-bridge circuit is connected between the power supply and a second end of the coil, and the control ends of the first half-bridge circuit and the second half-bridge circuit are connected with control signals with opposite levels. Through the matrix connection mode, the left half bridge and the right half bridge can share the common half bridge in a grouping mode, a plurality of coils can be controlled only through a small number of IO ports, and microcontroller resources are greatly saved.

The invention provides a multi-resonant switched capacitor efficient cooperative operation method suitable for battery active equalization, and the method comprises the steps: building a zero-voltage soft switching realization condition model of a single-module resonant unit, and determining the amplitude constraint and direction constraint of a soft switching current needed by a switching tube for realizing zero-voltage switching; based on topology, identifying current paths of the half bridges located at the top layer, the middle layer and the bottom layer in the soft switching transient process, and determining a mathematical relationship between the soft switching current of each layer of half bridge and the current of each resonant cavity; respectively establishing equivalent circuit models at switching moments for the top-layer half-bridge, the middle-layer half-bridge and the bottom-layer half-bridge, and solving to obtain each initial current value of the corresponding junction capacitor voltage at the switching moments; and substituting each initial current value obtained by solving into the established constraint condition, and drawing an operation parameter boundary of the topology capable of realizing soft switching in all working modes. According to the invention, by determining the operation boundaries of all half-bridge soft switches of the multi-resonant switched capacitor structure, the switching loss is reduced, and the operation efficiency is improved.

The invention discloses a half-bridge module and a switching power supply circuit. The half-bridge module comprises an enhancement mode device serving as an upper tube and a depletion mode device serving as a lower tube; the source electrode of the enhancement mode device and the drain electrode of the depletion mode device are electrically connected and form a common node, and the node is used for inputting or outputting power; the drain electrode of the enhanced device is used as the high-voltage end of the half-bridge module, and the source electrode of the depletion device is used as the low-voltage end of the half-bridge module; the grid electrode of the enhancement type device is used for accessing an upper tube driving signal, the grid electrode of the depletion type device is used for accessing a lower tube driving signal, and the enhancement type device and the depletion type device are configured to be in complementary conduction. According to the half-bridge module provided by the invention, the enhanced device is naturally closed when no control signal exists, and a built-in safety characteristic is provided. The depletion type device reduces conduction loss and switching loss and improves overall efficiency due to low conduction resistance and stray capacitance of the depletion type device.

This invention relates to a silicon carbide bidirectional switching half-bridge power module, belonging to the field of semiconductor device technology. The bidirectional switching half-bridge power module includes a module housing, a DBC (Diverterless Circuit Blocker), silicon carbide bidirectional switching units soldered onto the DBC, power terminals, signal terminals, and a thermistor. The silicon carbide bidirectional switching power module adopts a half-bridge structure, which consists of two bidirectional switching units. Each bidirectional switching unit is composed of two sets of silicon carbide MOSFETs connected with a common drain. The bidirectional switching half-bridge circuit is integrated on a single DBC, and the conductive areas of the silicon carbide chip and the DBC are connected by bonding wires to form the bidirectional switching units and the half-bridge structure, with corresponding power terminals and signal terminals led out. This invention achieves bidirectional conduction and bidirectional blocking of current, and is packaged as a bidirectional switching half-bridge structure, improving reliability, reducing parasitic inductance, increasing power density, and lowering the parasitic inductance of the power module.

The invention belongs to the technical field of power electronic converters, and particularly discloses a full-bridge T-type LLC converter parallel system and a wide-gain-range staggered current sharing method. The system comprises two phases of LLC converters connected in parallel, wherein each phase of LLC converter comprises an input capacitor, a primary side structure of a T-shaped full-bridge structure, a resonant cavity, a transformer and a secondary side structure which are connected in sequence; the primary side structure of the T-shaped full-bridge structure comprises an upper half bridge composed of four switch tubes Q1-Q4 and a lower half bridge composed of switch tubes Q5-Q8. By introducing the T-shaped full-bridge structure, the output gain range can be effectively improved, and staggered current sharing control in the wide output gain range is achieved.

The present invention relates to a power conversion device having a multiphase interleaving structure. The power conversion device according to the present invention comprises at least one hybrid half-bridge having a first-type switching element and a second-type switching element, and at least one single-type half-bridge having a second-type switching element.

A buck regulator circuit comprises a half bridge comprising high and low side switches driven by a PWM signal, a pair of drivers coupled to a given switch among the high and low side switches to supply selectively first and second driving currents, enabling selectively the first and / or second driving current to supply a current switching on the given switch, an ON current value passing through the given switch at a switch-on depending on which of the first and / or second driving current is enabled, and a timing circuit configured, during the switch-on of the switch, to enable the first and / or second driving current so that in the given switch passes a first value the ON current, then, after a delay time, enabling the first and / or second driving current so that in the given switch passes a second value of the ON current greater than the first value.

The present invention addresses the problem of achieving miniaturization while reducing ripple current. In a power conversion device (10), a first half bridge circuit (21) is connected between a positive electrode input terminal (11) and a negative electrode input terminal (12). A second half bridge circuit (22) is connected between a first phase output terminal and the negative electrode input terminal (12). A third half bridge circuit (23) is connected between a second phase output terminal and the negative electrode input terminal (12). A third phase output terminal among the first, the second, and the third phase output terminals is short-circuited to the positive electrode input terminal (11).

A drive circuit includes a first half bridge gate driver including a first top device and a first bottom device; a second half bridge gate driver including a second top device and a second bottom device; jumper connections and a circuit board. The jumper connections configure the drive circuit as two parallel half bridge gate drivers connected in parallel when jumpers are applied to the jumper connections. The jumpers connect a control gate of the first top device to a control gate of the second top device and connect a control gate of the first bottom device to a control gate of the second bottom device. The circuit board includes the first and second half bridge gate drivers and electrical interconnect to configure the first half bridge gate driver and the second half bridge gate driver as a switched reluctance converter in the absence of the jumpers.

A method for ancillary supply in a modular multi-level converter with a plurality of modules arranged in strands, a respective module including at least two half bridges with semiconductor switches and at least one energy accumulator, which are interconnected in parallel. In the respective module, an at least single-core input terminal is formed through respective center tapping in at least one half bridge on an input side, and an at least single-core output terminal is formed through respective center tapping in at least one half bridge on an output side. The strands are interconnected into at least one star point on the at least single-core input terminal of a first module in the respective strand. A respective phase of a supply voltage in a high-voltage system is formed on the at least single-core output terminal of a last module in the respective strand.

A control circuit for a current source converter having a current generator comprising an inductance and having two or more half bridges, each half bridge having an upper leg provided with upper switching devices and a lower leg provided with lower switching devices, the upper leg switching devices and the lower leg switching devices being controlled by a controller to provide overlap between upper leg off switching devices and upper leg on switching devices and to provide overlap between lower leg on switching devices and lower leg off switching devices by gate pull-up and pull-down pulse signals input to gate driver buffers of the switching devices, characterized in that the gate driver circuit comprises: - a gate current mirror circuit for each upper leg switching device and each lower leg switching device, the gate current mirror circuit providing a gate pull-down signal on a source branch of the gate driver buffer of the switching device when the switching device is off, the gate pull-down signal being connected to a control line of a gate buffer of a respective other upper leg switching device or other lower leg switching device, - a positive gate command connection path from a positive gate command output of a pre-driver for each upper leg switching device and each lower leg switching device, the positive gate command connection path providing a reset signal for the gate pull-down signal of the respective other upper leg switching device or respective other lower leg switching device.