73 results about "Half bridge" patented technology

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.

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 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 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 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.

This invention proposes a three-active half-bridge DC-DC converter and its control method based on device reuse, belonging to the field of power electronics technology. To address the problems of complex architecture and low transmission efficiency in existing dual-active-bridge DC-DC converters, it includes: an FSBB circuit and a TAHB circuit. The FSBB circuit includes an extended half-bridge. HB 0. Energy storage inductor L m and reused half bridge HB 1. The TAHB circuit includes a multiplexed half-bridge. HB 1. Transmission half-bridge HB 2 and transmission half-bridge HB 3. The control method includes: switching the three active half-bridge DC-DC converter to single-input dual-output mode or dual-input single-output mode according to the number of input and output ports in the bidirectional port; setting the control strategy of TAHB circuit and FSBB circuit; and triggering eight working modes in sequence according to the closed / open state of different switching transistors. In each working mode, soft switching of the switching transistor is achieved by discharging the parasitic capacitance of the body diode of the switching transistor through the inductor current, thereby completing the high-efficiency transmission of energy storage.

The utility model belongs to the field of balance car, and relates to balance car controlling means, include: controller, brushless motor three -phase drive circuit, single -phase half bridge drive circuit, gyroscope sensor circuit, light control circuit, hall detection circuit, BUCK -BOOST voltage reduction circuit, charge detection circuit and battery detection circuit through electrical connection with controller, controller is used for receiving the information of gyroscope sensing circuit and hall detection circuit, keeps the balance of balance car through the rotation of control motor, brushless motor three -phase drive circuit is used for receiving the control signal of controller, drives brushless motor rotation, single -phase half bridge drive circuit is used for auxiliary drive or brake control, and gyroscope sensor circuit is used for detecting the inclination angle and angular velocity of balance car, and inclination angle and angular velocity are transmitted to controller. The balance stability is improved, the battery management is improved, the power system efficiency is improved, and the additional function is increased.

The invention relates to an inverter circuit (1) for operating a multi-phase electric machine, comprising a) a number N of parallel winding strands (2.1 - 2.6) per phase, wherein each of the winding strands (2.1 - 2.6) - one winding (L1 - L6), - a selectively switchable, clocked-operable half-bridge (20.1 - 20.6) connected to the winding (L1 - L6) of the relevant winding strand (2.1 - 2.6) and to an intermediate circuit voltage (U DC ) is connected, as well as - a switching element (3.1 - 3.6) by means of which the relevant winding strand (2.1 - 2.6) can be selectively electrically connected to a star point (100), exhibits, b) a number N-1 of series-connected electrical elements (4.1 - 4.5), wherein adjacent winding strands (2.1 - 2.6) can be selectively electrically connected to one another by means of one of the series-connected elements (4.1 - 4.5), wherein the number (a) of parallel winding branches can be adjusted by means of a corresponding interconnection of the winding strands (2.1 - 2.6) using the half bridges (20.1 - 20.6), the switching elements (3.1 - 3.6) and the series switching elements (4.1 - 4.5).

The present application relates to power supply circuit device system technical field, especially to a kind of single-phase inverter system based on battery pack and bidirectional switch bridge arm, left half bridge of traditional H bridge inverter is replaced by first battery pack and second battery pack series connection, right half bridge then adopts first bidirectional switch and second bidirectional switch to constitute.Wherein, first battery pack as upper bridge arm, second battery pack as lower bridge arm.In inverter mode, by controlling the access quantity of single battery unit in left half bridge to generate ladder wave to approximate positive half cycle or negative half cycle of sine wave, simultaneously cooperate with the power frequency commutation of right half bridge bidirectional switch, i.e., can be synthesized ac voltage at output end, without complex PWM modulation and filter inductance.In charging mode, by parallelly connecting charging unit to the upper bridge arm of right half bridge, and using battery unit access or bypass control of left half bridge, i.e., the selective charging of any single battery can be realized, so that battery equalization management capability is realized.

An energy storage system (1) is specified, comprising at least one energy storage module (2) configured to be connected to a power transmission system (3), a resistor (4) connected in series to at least one energy storage module (2), and a switch (5) connected in parallel to the resistor (4), wherein the switch and resistor (4) are configured to be connected to a reference potential (10), and at least one energy storage module (2) comprises an energy storage block (6), and at least one energy storage module (2) comprises a half-bridge module (7) electrically connected to the energy storage block (6). Furthermore, a method for operating the energy storage system is provided.

A converter includes a first stage connected to first and second input terminals and including a first-stage IC having a feedback terminal, a first half-bridge circuit and a second half-bridge circuit connected in parallel, each of the first and second half-bridge circuits including a half-bridge IC that receives a clock signal from the first stage, a transformer including a single magnetic core, a first primary winding extending around the single magnetic core and connected to the first half-bridge circuit, a second primary winding extending around the single magnetic core and connected to the second half-bridge circuit, and a secondary winding extending around the single magnetic core, a rectifier connected to the secondary winding, first and second output terminals connected to the rectifier, and a feedback circuit connected between the first output terminal and the feedback terminal of the first-stage IC.

The application discloses a full N type GaN HEMT half-bridge driving circuit and relates to the field of GaN HEMT driving circuits.The full N type GaN HEMT half-bridge driving circuit comprises a biasing stage circuit and a driving stage circuit.The biasing stage circuit comprises a filter capacitor C1 and pull-up tubes M1, M3, M6, a resistor R3 and a resistor R5 connected with a power supply; and a bootstrap capacitor C2 and pull-down tubes M4 and M7 connected with the driving stage circuit.The driving stage circuit comprises a bootstrap diode D1 and a pull-up tube M9 connected with the power supply; a bootstrap capacitor C3 and a pull-up tube M9 and a pull-down tube M connected with an output end. 10 The application improves the output load capacity by using the bootstrap boosting method, and realizes the full N enhancement type GaN HEMT half-bridge driving circuit to drive the GaN HEMT device.

The utility model provides an ultrasonic detection circuit for rain and water level integrated machine, provides high pressure excitation pulse signal to the transmitting and receiving integrated rain ultrasonic probe and water level ultrasonic probe, it includes a controller of providing PWM1 and PWM2 signal, still includes: half bridge inverter circuit is used to the direct current voltage VDC input to half bridge drive chip U1 is inverted into square wave voltage PowSW, voltage dividing transformer circuit produces high voltage pulse signal HvSig, excitation pulse generation circuit is used to produce high voltage excitation pulse signal TransducerSig, and is connected water level ultrasonic probe JP1 and rain ultrasonic probe JP2. Through the technical scheme provided by the utility model embodiment, two probes can be simultaneously driven through a circuit, thereby realizing the detection of rain and water level, through the technical scheme, the depth multiplexing and integration of the two are realized from the circuit structure, and the measurement of rain intensity and rain is realized by directly using the rain gauge cylinder scheme, and the volume is greatly reduced.

The invention discloses a half-bridge driving circuit and a switching power supply, and the half-bridge driving circuit comprises two input ends which are respectively used for inputting a first initial PWM wave signal and a second initial PWM wave signal; the mode selection circuit is used for setting the driving mode of the circuit to be a direct or half-bridge driving mode; the logic circuit is used for interlocking the first initial PWM wave signal and the second initial PWM wave signal transmitted by the mode selection circuit when the mode selection circuit is set to be in the half-bridge driving mode, and generating first driving PWM wave signals and second driving PWM wave signals which are complementary and have dead time; the driving chip circuit is used for enhancing the driving capability of the second PWM wave signal and then controlling the lower bridge power tube, and enhancing the driving capability of the first driving PWM wave signal and then controlling the upper bridge power tube; and the active clamping circuit is used for clamping the voltage at the two ends of the power tube when the voltage at the two ends of the turned-off power tube exceeds a set value, and raising the driving voltage of the power tube by controlling the capacitor charging current at the control end of the power tube to be raised. The circuit stability can be improved.

Power converters and methods for controlling the same are disclosed and include primary sides of two transformers connected in series to form a primary series assembly and an input switch assembly operating in a full-bridge mode or a half-bridge mode. In a first configuration, the primary series assembly and a capacitor are connected in series between two nodes of the input switch assembly, and a control module is electrically connected to the input switch assembly. Alternatively, in the second configuration, a node of the input switch assembly is electrically connected to a node formed in a series connection of two input capacitors through a back-to-back switch assembly, and the control module is electrically connected to the input switch assembly and the back-to-back switch assembly. In the full-bridge mode, there is a phase shift value between control signals of two switches.

The application discloses a sensor multiplexing current tracking control method and device and related equipment, and the method comprises the following steps: acquiring a reference current output by a measured transformer, and collecting total inductance currents of n-phase interleaved transformers; the total inductance current is the sum of all inductance currents corresponding to n parallel half-bridge circuits; calculating a total current error between the total inductance current and the reference current; for each phase in the n phases, based on the total current error and the actual sampling value of the inductance current, a coupling reference value corresponding to the inductance current of each phase is generated; according to the coupling reference value, the duty cycle of the lower switch in each phase half-bridge circuit is calculated; based on the duty cycle calculated for each phase, the on-off state of the upper switch and the lower switch of the corresponding phase half-bridge circuit is controlled respectively, so that the total inductance current tracks the reference current. By introducing the coupling reference value based on the total current error, the current tracking speed and accuracy of the multi-phase interleaved transformer are improved.

The application discloses a motor controller active discharge control method and related devices, which saves cost and printed circuit board area. The method comprises the following steps: in response to an active discharge instruction, controlling at least two phase bridge arms of a motor controller to simultaneously perform a preset action; wherein the preset action comprises: a power switch tube of a first half bridge arm of the bridge arm is completely turned on; and a power switch tube of a second half bridge arm of the bridge arm is periodically switched between a completely turned-on state and a completely turned-off state under the control of a PWM signal.

The application discloses a kind of balancing control methods and systems for reducing the voltage fluctuation difference of hybrid MMC half-bridge-full-bridge module, belong to multilevel converter field, specifically: according to the total number of module input as needed to generate half-bridge and full-bridge module input number candidate combination;Calculate all predicted values of the average voltage of half-bridge and full-bridge module capacitor inside bridge arm;Calculate the cost function of capacitor voltage fluctuation corresponding to all candidate combinations, obtain the optimal input number of half-bridge and full-bridge module;According to the optimal input number and the direction of bridge arm current, respectively, the capacitor voltage sequencing control method is used to half-bridge and full-bridge module, to obtain the driving signal of half-bridge and full-bridge module.The application generates the optimal input number of half-bridge and full-bridge module inside bridge arm through model predictive control, can control the capacitor voltage of half-bridge and full-bridge module can track reference value with minimum error when normal operation and over-modulation operation, capacitor voltage keeps balance and voltage fluctuation difference is small.

This invention relates to the field of drive circuit technology, and discloses a highly reliable gate drive circuit, drive chip, and power semiconductor device. The circuit breaks through the existing passive compromise scheme that relies solely on adjusting the turn-off resistor. It uses a detection unit to collect the gate voltage of the IGBT unit in real time, a latch unit to output a stable square wave signal when the voltage reaches a preset threshold, and a pull-down unit to simultaneously provide a low-impedance discharge path, actively suppressing abnormal gate voltage rise caused by the Miller effect. The design of the Miller suppression unit avoids the switching speed reduction and device overheating problems caused by increasing the turn-off resistor, while effectively suppressing the risk of mis-turn-on caused by crosstalk between the upper and lower bridge arms, achieving dual optimization of crosstalk suppression and switching performance. This significantly improves the reliability and stability of the gate drive, extends the lifespan of the power semiconductor device, and is suitable for various power topologies such as half-bridge and full-bridge, with wide application scenarios and strong practicality.

The disclosure is a hybrid modular multilevel converter and a control method thereof. A voltage difference is added to an original voltage of each half-bridge sub-module or an original voltage of each full-bridge sub-module to obtain a compensation voltage, the voltage difference has a correlation with a difference between the original voltage of the half-bridge sub-module and the original voltage of the full-bridge sub-module. According to a bridge arm current and a voltage reference value, a signal with the compensation voltage of one sub-module and a signal with the original voltage of another sub-module are sorted to obtain an operation sequence of the half-bridge sub-module and the full-bridge sub-module. According to the original voltage of the half-bridge sub-module and the full-bridge sub-module, the voltage reference value and the operation sequence, an operation mode of the half-bridge sub-module and the full-bridge sub-module is calculated, and a driving signal is output to control the half-bridge and full-bridge sub-modules, so that the voltage difference gradually approaches or equals to 0.

This invention provides an ultra-fast commutation square-wave AC welding power supply, comprising: a rectifier bridge circuit for rectifying AC to DC; a filter and voltage regulator circuit for eliminating high-order ripple and obtaining smooth DC; a full-bridge inverter circuit for converting DC to high-frequency AC; a high-frequency transformer for isolation and voltage reduction; a secondary full-bridge rectifier circuit for converting high-frequency AC to DC; a coupling inductor for coupling; a half-bridge inverter circuit for converting DC to AC square waves; and a constant voltage clamping circuit; the load is connected between the midpoint of the half-bridge inverter circuit and the center tap of the high-frequency transformer. This power supply enables faster commutation of square-wave AC current and energy recovery during the commutation process, thereby improving the stability of the AC welding process and the conversion efficiency of the square-wave AC welding power supply.

A control circuit for a totem pole PFC circuit. The totem pole PFC circuit has a first half-bridge and a second half-bridge both coupled between an output terminal and a reference ground and converts an AC input voltage to an output voltage. The control circuit turns on a first switch or a second switch of the first half-bridge multiple times during a zero-crossing interval of the AC input voltage to gradually charge or discharge a switch node of the second half bridge.

This invention discloses a bootstrap-driven half-bridge inverter, its startup method, and an energy storage system. The half-bridge inverter includes a first switch, a second switch, a positive bus capacitor, a negative bus capacitor, a bootstrap circuit, a first switch drive circuit, and a second switch drive circuit. The bootstrap circuit includes a drive power supply, and the second switch drive circuit is connected between the two ends of the drive power supply. The startup method includes: sending a lock-in signal to the first switch drive circuit and sending a drive signal with a duty cycle less than a preset threshold to the second switch drive circuit, so that the drive power supply charges the bootstrap capacitor in the first switch drive circuit; after the bootstrap capacitor in the first switch drive circuit is fully charged, sending complementary duty cycle signals to the first and second switch drive circuits. This invention can improve the startup reliability and output power quality of half-bridge inverters using bootstrap drive circuits.

The invention relates to the determination of a negative control voltage for application to a control terminal of a passive semiconductor switch (18) in a half-bridge circuit (20) of a traction converter (14) of a vehicle (10), to a method for determining a negative control voltage having the following steps: (a) setting (S10) an initialization value of the negative control voltage; (b) increasing (S12) the negative control voltage by an increase value; (c) performing (S14) an emission measurement for determining an emission parameter reflecting the strength of electromagnetic emission at operation of the traction converter based on the increased negative control voltage; (d) checking (S16) whether the emission parameter is below a limit value, and repeating steps (b) to (d) until the emission parameter is below the limit value. The invention also relates to a traction converter (14) having a half-bridge circuit (20).

The utility model relates to the field of power electronics, and specifically provides a transformer isolation drive circuit of vehicle-mounted power supply, including isolation transformer, chip drive module, two groups of primary drive module, two groups of secondary drive module, the chip drive module adopts double -channel drive chip, single group primary drive module includes first resistance and first series diode, single group secondary drive module includes MOS pipe, second resistance and second series diode, drive resistance, the application creates double -channel drive, can be applicable to half -bridge, full -bridge topological structure, and good applicability, high practicality. The circuit overall structure is simple, and from the economic angle, isolation transformer is easy to wind, can adjust the turns ratio of transformer primary and secondary according to actual drive voltage, is flexible both in cost and low, has good market application value.

A control circuit of a Totem PFC circuit is disclosed. The Totem PFC circuit includes a first half-bridge and a second half-bridge coupled between an output and a reference ground, the first half-bridge coupled to an inductor and including a first switch and a second switch. The Totem PFC circuit is configured to receive an AC input voltage and provide an output voltage. The control circuit of the present disclosure can turn on the first switch or the second switch of the Totem PFC circuit multiple times during zero crossing of the AC input voltage to gradually charge or discharge a switch node of the second half-bridge, reducing a voltage slew rate of the switch node of the second half-bridge, thereby improving electromagnetic interference performance of the circuit and avoiding generation of audio noise.

The invention discloses a switch short-circuit fault-tolerant control method and a system for magnetic bearing system, which belongs to the field of magnetic bearing control. N-axis magnetic bearing contains 2N H half-bridge topologies, 2N windings, and 1 DC voltage source. The current and modulation wave of each winding are monitored in real time. When a switch short-circuit fault occurs, the above data help to identify the faulty switches. By introducing the physical model of the electromagnetic force of the magnetic bearing, winding currents can be redistributed and the required electromagnetic force can be reconstructed to ensure rotor suspension and avoid serious faults such as rotor falling. This method can effectively prevent the magnetic bearing system from being destabilized when the switch short-circuit fault occurs, prevent the rotor from falling, and enable the magnetic bearing system to have the ability to operate with switch short-circuit fault tolerance.

This invention discloses a three-level six-switch DC-DC converter, belonging to the field of power electronics, comprising: a three-level unit, a DC-DC conversion half-bridge, and a control unit; the three-level unit adopts a three-level half-bridge topology; the DC-DC conversion half-bridge includes a half-bridge structure composed of a fifth switch Q1 and a sixth switch Q2; the midpoint of the three-level half-bridge topology is connected to the midpoint of the bridge arm of the half-bridge structure through an inductor L1; an input capacitor C is connected in parallel on the input side of the three-level unit. in A parallel output capacitor C is connected to the output side of the DC-DC converter half-bridge. o The control unit is used to control the three-level six-switch DC-DC converter using a two-level modulation method when the voltage of the input three-level unit is less than the set value; otherwise, it controls the three-level six-switch DC-DC converter using a three-level modulation method. It can achieve soft-switching and low-current ripple operation under high input voltage and wide gain range conditions, and is suitable for photovoltaic power generation systems, centralized energy storage, integrated chips, and other applications.