766 results about "Half bridge" patented technology

Disclosed in the present invention is a packaging structure of a half-bridge power module. The packaging structure comprises an insulating and thermal conductive plate, a multi-layer circuit board, a plastic package body and a bridge arm switch. Further disclosed in the present invention is the use of a packaging structure of a half-bridge power module in an OBC power source converter, a DCDC isolated converter, a non-isolated power source converter, a cardiac arrest awakening apparatus, and a circuit module formed by means of combining multiple half bridges such as ANPC, TNPC and Heric. Further disclosed in the present invention is a manufacturing method for a packaging structure of a half-bridge power module. The method comprises: performing assembling; providing an overflow region; and synchronously performing filling and grinding to remove the overflow region. In the present invention, a minimum size and a low impedance are achieved by means of DBC, flexible pin leading-out and welding are realized by means of a PCB, the reliability, safety and heat dissipation of modules are supported by means of a plastic packaging body, and the extension of a temperature monitoring unit and a decoupling capacitor is supported.

The present invention discloses a prediction method for a crosstalk spike in a half bridge of current-source inverter with silicon carbide devices, where, the prediction method includes calculation of the crosstalk voltage spike in the circuit of current-source type double-pulse test and analysis of the effect of each parameter on the magnitude of the crosstalk spike. The prediction method of the present invention analyzes the horizontal conduction crosstalk mechanism between the gate-source junction of the MOSFET caused by the high-frequency switching action of the silicon carbide (SiC) MOSFET and the SiC Schottky diode connected in series, and derives the prediction model for the crosstalk voltage spike in the half-bridge of current-source inverter. Based on the equivalent circuit of the current-source-type double-pulse test and the crosstalk-induced mechanism, the extreme value of crosstalk voltage spike is accurately predicted, which is helpful to analyze the effects of the drive circuit and the parameters of the power circuit on the crosstalk voltage spike through the prediction model.

The power supply conversion circuit includes an isolation transformer, and the isolation transformer includes at least two primary coils and at least one secondary coil. Each primary coil is connected to a half-bridge circuit by using a first resonant network, and half-bridge circuits corresponding to the at least two primary coils are connected in series between two electrodes of a power supply. The half-bridge circuit is connected in parallel to a voltage divider, the voltage divider includes a first capacitor and a second capacitor that are connected in series, a first terminal of the first resonant network is connected to an intermediate node of the half-bridge circuit, and a second terminal of the first resonant network is connected to a connection point between the first capacitor and the second capacitor.

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.

A control circuit is provided, for controlling switching elements of an asymmetric half bridge (AHB) converter. The AHB converter includes a first switching element, a second switching element, a capacitor, and a transformer having a primary side and a secondary side. The control circuit includes a first output, for controlling the first switching element; and a second output, for controlling the second switching element. The control circuit also includes control logic, configured to generate a first pulse width modulated, PWM, control signal at the first output and a second PWM control signal at the second output. The control logic may have a first operation mode in which it is configured to cause a magnetizing current of the transformer to remain greater than zero throughout a switching period of the first and second PWM control signals.

A dynamic on-resistance and threshold voltage instability evaluation circuit for power devices and its operation method thereof are provided. The evaluation circuit includes a first switch element and a device under test which forms a half bridge circuit, an RL load, as well as a second switch element in parallel with a capacitor. The device under test is connected as a lower switch of the half bridge circuit. And the RL load enables repetitive hard switching operation of the device under test for dynamic on-resistance measurement. The second switch element in parallel with the capacitor enables threshold voltage measurement of the device under test. By adopting the circuit to characterize both instabilities of dynamic on-resistance and gate threshold voltage, the present invention is beneficial to achieving in shorter pulse width, faster measuring speed and inexpensive measuring equipment, and can thus be widely applied to group III-N based power devices.

The embodiment of the invention provides a control method and control circuit of a half-bridge flyback converter, a chip and power supply equipment. The control method comprises the steps that when the half-bridge flyback converter works in a free resonance state, in a first switching period, the second primary switching tube is controlled to be switched on so that the half-bridge flyback converter can exit from the free resonance state, after a preset switching-on duration, the second primary switching tube is controlled to be switched off so that excitation current can be negative current, and the half-bridge flyback converter can be switched off. And the half-bridge flyback converter enters the free resonance state again, and the first primary switch tube is controlled to be switched on at the moment which is separated from the switching-off moment of the second primary switch tube by odd number times of the free resonance half cycle, so that the valley bottom of the first primary switch tube is switched on, the efficiency of the half-bridge flyback converter can be improved, and the service life of the half-bridge flyback converter is prolonged. And the peak stress when the secondary switch tube is turned off can be reduced, so that the EMI of the half-bridge flyback converter is improved.

The embodiment of the invention provides a half-bridge flyback converter, a control method thereof, a control circuit and a chip. The control method comprises the steps that when the half-bridge flyback converter works in a free resonance state, in a first switching period, a second primary switching tube is controlled to be conducted for a first time length, and according to sampling voltage information of a secondary power loop, after it is detected that the second primary switching tube is conducted, a secondary switching tube is controlled to be conducted for a second time length, the half-bridge flyback converter can perform reverse excitation so as to generate negative excitation current, the zero voltage at the two ends of the first primary switch tube is reduced to zero, and when the first primary switch tube is controlled to be switched on, zero-voltage switching-on of the first primary switch tube can be realized. According to the method, the noise of the half-bridge flyback converter can be reduced, and zero-voltage switching-on of the first primary switching tube can be realized under the DCM of the wide-range output voltage of the half-bridge flyback converter, so that the efficiency of the half-bridge flyback converter under the DCM is improved.

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.

A resonant asymmetrical half-bridge flyback power converter includes: a first transistor and a second transistor switching a transformer coupled to a capacitor for generating an output power; a voltage divider coupled to an auxiliary winding of the transformer; a differential sensing circuit which includes a first terminal and a second terminal coupled to the voltage divider to sense an auxiliary signal generated by the auxiliary winding for generating a peak signal and a demagnetization-time signal; and a PWM control circuit configured to generate a first PWM signal and a second PWM signal in accordance with the peak signal and the demagnetization-time signal, for controlling the first transistor and the second transistor respectively; wherein a period of an enabling state of the demagnetization-time signal is correlated to the output power level; wherein the peak signal is related to a quasi-resonance of the transformer after the transformer is demagnetized.

The invention belongs to the field of crimping IGBT junction temperature estimation, and particularly discloses a crimping IGBT half-bridge module junction temperature online estimation method and system, and the method comprises the steps: carrying out the decoupling of a double-side thermal network model based on a multi-heat-flow path of a crimping IGBT half-bridge module, and achieving the junction temperature estimation of the crimping IGBT half-bridge module; wherein the establishment method of the double-sided thermal network model comprises the step of constructing the double-sided thermal network model based on the double-sided junction-to-case thermal resistance, the water-cooled radiator thermal resistance, the circulating water equivalent thermal resistance and the coupling thermal resistance of the crimping IGBT half-bridge module by taking the water inlet temperature of the water-cooled radiator as the reference temperature and combining the power loss of each crimping IGBT in the crimping IGBT half-bridge module. The method has research value and application prospect for junction temperature estimation and reliability evaluation of the converter valve crimping IGBT.

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).

A power converter, power converter controller, and method of controlling a power converter are described. The power converter includes: a half bridge or full bridge switch network; an LLC resonant tank electrically coupled to the switch network; a rectifier circuit electrically coupled to a filter capacitor configured to provide a DC output voltage; a transformer inductively coupling the rectifier circuit to the LLC resonant tank; and a controller configured to determine a reference voltage to which the DC output voltage is regulated, and adjust a switching frequency of the switch network based on a difference between the DC output voltage and the reference voltage. The controller is configured to determine the reference voltage based on input voltage and / or output current feedback for the power converter and / or determine a variable switching frequency or a variable switching period for the switch network based on input voltage magnitude and output current magnitude.

A lamp driver has a transformer, a primary side circuit and a secondary side circuit. The primary side circuit comprises a half bridge circuit and a sensor circuit for measuring a conduction time or switching frequency of one of the transistors of the half bridge circuit. An estimate is provided of the output voltage from the measured conduction time.

The invention provides a hybrid modular multilevel converter and an active arc extinction regulation and control method. The hybrid modular multilevel converter comprises a three-phase full-bridge and half-bridge hybrid modular multilevel converter. The first zero-sequence current path module and the second zero-sequence current path module are connected between the positive electrode of the direct-current side of the three-phase full-bridge half-bridge hybrid modular multilevel converter and the ground and between the negative electrode of the direct-current side of the three-phase full-bridge half-bridge hybrid modular multilevel converter and the ground, and provide paths for zero-sequence current required by arc extinction; and the full-bridge sub-module cascade string is connected to positive and negative direct-current buses of the three-phase full-bridge and half-bridge hybrid modular multilevel converter. According to the active arc extinction regulation and control method, after the hybrid modular multilevel converter detects that a power distribution network breaks down, a voltage arc extinction method is adopted, proportional resonance (PRC) control is carried out on a 0 axis, MMC is controlled to output zero-sequence voltage, and the zero-sequence voltage of a system is regulated and controlled, so that the fault phase voltage is reduced to zero, and the fault current is reduced to zero; and the fault current is transferred to the DC side grounding branch.

The invention discloses a BUCK-BOOST multi-stage half-bridge circuit series aging topological structure and a control method, and in the topological structure, a front-stage BUCK circuit and a rear-stage BOOST circuit are symmetrically designed by taking a voltage-stabilizing energy-storage capacitor as a center; the pre-stage BUCK circuit comprises a plurality of BUCK half-bridge units which are cascaded in sequence, and the post-stage BOOST circuit comprises a plurality of BOOST half-bridge units which are cascaded in sequence; the BUCK half-bridge unit and the BOOST half-bridge unit have the same circuit structure and each comprise an upper bridge arm and a lower bridge arm; in the BUCK half-bridge unit, an upper bridge arm switch and a lower bridge arm switch are connected to the output end of the upper stage, and an inductor L and the negative end of a lower bridge arm are connected to the input end of the lower stage; in the BOOST half-bridge unit, the inductor L and the negative end of the lower bridge arm are connected to the output end of the upper stage, and the upper bridge arm switch and the lower bridge arm switch are connected to the input end of the lower stage. According to the invention, cascade aging of BUCK and BOOST is realized, the aging efficiency is greatly improved, the energy loss is reduced, the cost is saved, the cascade aging is closer to system operation, the verification is more sufficient, and the working condition coverage is larger.

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 discloses a circuit topology design method for a single-stage AC-DC converter, and relates to the technical field of power supply systems, and a totem-pole bridgeless Boost power factor correction circuit and an LCC half-bridge resonant converter with current-doubling synchronous rectification are integrated together through a switching tube sharing technology. Wherein the totem pole bridgeless Boost power factor correction PFC circuit comprises vin, Lf, Cb, two diodes D1 and D2, and two MOS switch tubes S1 and S2; the front stage of the LCC half-bridge resonant converter comprises two MOS switch tubes S1 and S2, a series resonant capacitor Cr, a parallel resonant capacitor Cp and a series resonant inductor Ls. The single-stage AC-DC converter circuit topology provided by the invention has the advantages that the preceding stage only needs one set of controller, the control logic is simple, the number of used electronic components is small, the cost is low, the efficiency is high and the reliability is high; and the backward stage is provided with the current-doubling synchronous rectification circuit, so that the single-stage AC-DC converter circuit topology has the advantages of being high in efficiency, small in loss and suitable for a large-current output occasion.

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.

The invention provides a phase delay test and compensation method for an active power filter, and the method comprises the steps: generating a sine wave control signal with the frequency range of 1 kHz to 20 kHz through an FPGA, and driving a half-bridge inverter of the active power filter to output an analog signal; measuring delay time of three delay links in the active power filter by modules, wherein the delay time comprises delay 1 of an error detection link, delay 2 of an inversion link and delay 3 of a digital processing link; and taking the sum of the delay 1 of the error detection link, the delay 2 of the inversion link and the delay 3 of the digital processing link as the total delay of the system, introducing a phase compensation parameter in an LMS algorithm, and adjusting the phase of the offset current to enable the phase difference between the offset current and the harmonic current of the power grid to be 180 + / -5 degrees. According to the technical scheme, the delay parameter in the active power filter can be measured, phase alignment of the output signal of the active power filter and the harmonic current in the power grid is achieved in a compensation mode, and suppression of the harmonic current of the power grid is achieved.

Control circuit for a current source converter having a current generator comprising an inductance (2) and having two or more half bridges each half bridge having an upper leg provided with an upper switching device (11, 13) and a lower leg provided with a lower switching device (12, 14), said upper legs switching devices and said lower legs switching devices being controlled by a controller (40) to provide an overlap between an upper leg turning off and an upper leg turning on switching device and to provide an overlap between a lower leg turning on switching device and a lower leg turning off switching device through gate pull up and gate pull down pulse signals to gate drivers buffers (6) of said switching devices, where said gate driver circuit comprises: - for each switching device (11, 12, 13, 14) a gate current mirroring circuit (5) on a sink branch of the gate driver buffer (6) of such switching device (11, 12, 13, 14) to provide a gate pull down detection signal (Im) from a turning OFF switching device, - for each switching device (11, 12, 13, 14) a gate command connection path to provide a gate command signal (G), at least one logic circuit combining a gate command signal (G) of a first upper or lower leg switching device and a gate pull down signal of a respectively second upper or lower leg switching device to provide a first protection trigger signal (Pr), when said gate command signal of said first upper or lower leg switching device and said gate pull down detection signal of said respective second upper or lower leg switching device correspond to both said first and second upper leg switching devices or both said first and second lower leg switching devices being OFF; converter having such a control circuit.

A bidirectional power converter includes a first switch circuit coupled to a second switch circuit via a transformer, wherein the first switch circuit is configured to transfer power to the second switch circuit during a charging mode, the second switch circuit is configured to transfer power to the first switch circuit during a discharging mode, and the first switch circuit is configured to operate in a half bridge configuration during a first portion of the charging mode.

The invention relates to a DC / DC converter (1) for charging a battery (4) in a boost mode, wherein the DC / DC converter (1) has a primary side (P) and a secondary side (S), wherein on the primary side (P) and on the secondary side (S) a capacitance (CX_P, CX_S) is electrically coupled between a respective positive potential (HV+1, HV+2) and a respective negative potential (HV-1, HV-2), wherein - the primary side (P) and the secondary side (S) each have at least two half-bridges (HB1, HB2, HB3, HB4), each with a high-side switch designed as a semiconductor switch (S1, S3, S5, S7, D) and a low-side switch designed as a semiconductor switch (S2, S4, S6, S8), - LC resonant circuits (2.1, 2.2) designed as series resonant circuits are arranged between center taps of the half-bridges (HB1, HB2) on the primary side (P) and center taps of the half-bridges (HB3, HB4) on the secondary side (S), wherein exactly one of the potentials (HV+1, HV-1) of the primary side (P) is galvanically connected to the opposite pole potential (HV-2, HV+2) of the secondary side (S), wherein the other potential (HV-1, HV+1) of the primary side (P) is galvanically connected to a same pole battery terminal of the battery (4).

The utility model discloses a direct-current converter based on an asymmetric three-level bridge arm circuit, which comprises a direct-current bus, the asymmetric three-level bridge arm circuit connected with the direct-current bus in parallel, a resonance circuit, an isolation transformer and a rectifying circuit, the asymmetric three-level bridge arm circuit comprises a voltage dividing capacitor, a clamping circuit, a flying capacitor C3 and a half-bridge inverter. According to the direct-current converter, the connection points of the resonant circuits are changed, so that voltage sharing of the voltage-dividing capacitors is realized, the problem of neutral point imbalance caused by characteristic difference of a driving chip and a switching tube in the traditional half-bridge three-level converter is effectively solved, and the direct-current converter is higher in response speed and higher in control precision.

The invention relates to the technical field of motor driving, and discloses a motor driving circuit system of a high-speed air duct, which comprises a motor driving circuit composed of three half-bridge driving chips, and each chip is integrated with two high-voltage MOSFETs and a high-voltage grid driver to form a three-phase full-bridge driving topology; the current detection circuit comprises a single sampling resistor and a differential amplification circuit and is used for acquiring a motor phase current signal; the overcurrent comparison circuit comprises a high-speed comparator; a master control circuit; a back electromotive force detection circuit; an EMC filtering and power supply circuit; and a voltage detection circuit. High integration of a driving circuit is realized through a built-in half-bridge chip packaged by double MOSFETs and a driver QFN77, each chip integrates a temperature detection function and forms a three-phase full-bridge topology, the area of a PCB is reduced, the complete driving protection function is reserved, meanwhile, the layout complexity is remarkably reduced, and the requirements of portable equipment for compact space and low cost are met.

The present disclosure generally relates to a magnetic sensor half bridge circuit. The half bridge circuit comprises a bias source connected to a first leg and a second leg. The first leg comprises one or more first spin-orbit torque (SOT) structures connected in series, each first SOT structure comprising a first ferromagnetic (FM) layer disposed on a first SOT layer. The first SOT layer has a first end connected to ground and a second end connected to a first voltage sensor. The second leg comprises one or more second SOT structures connected in series, each second SOT structure comprising a second FM layer disposed on a second SOT layer. The second SOT layer has a first end connected to a second voltage sensor and a second end connected to a ground. The first voltage sensor is disposed adjacent to the second voltage sensor.

The invention belongs to the technical field of DC-AC converters, and relates to a single-stage current feed type bidirectional DC-AC converter and a fixed frequency control method thereof.The single-stage current feed type bidirectional DC-AC converter comprises a DC side composed of two Boost half bridges with inductors, an AC side composed of half bridges and an AC side filter, a transformer and a control device; the control device is used for controlling the direct current side and the alternating current side to describe the power transmission characteristics of the circuit by transconductance Gm, and the current control of the alternating current side is realized by a feedforward method; fixed-frequency linear phase shift control can be carried out in an ultra-wide DC side voltage range, bidirectional real-time power flow control can be realized in a relatively wide DC side voltage range, and a complex control loop design theory is not needed; therefore, the cost and the power consumption of the controller are effectively reduced, and a higher power density upper limit and a higher efficiency upper limit are achieved.

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.

Control circuit for a current source converter having a current generator comprising an inductance (2) and having two or more half bridges each half bridge having an upper leg provided with an upper switching device (11, 13) and a lower leg provided with a lower switching device (12, 14), said upper legs switching devices and said lower legs switching devices being controlled by a controller (40) to provide an overlap between an upper leg turning off switching device (11, 13) and an upper leg turning on switching device (13, 11) and to provide an overlap between a lower leg turning on switching device (12, 14) and a lower leg turning off switching device (14, 12) through gate pull up and gate pull down pulse signals to gate drivers buffers (6) of said switching devices, said gate driver circuit comprising: - for each upper leg switching device and each lower leg switching device (11, 12, 13, 14) a gate current mirroring circuit (51) on a source branch of the gate driver buffer (6) of said switching device (11, 12, 13, 14) to provide a gate pull down signal (Gpx, Gpy) upon turning OFF of said switching device, said gate pull down signal (Gpx, Gpy) being connected to a control line (Cl) of a gate buffer (6) of a respective further upper leg switching device or further lower leg switching device (11, 12, 13, 14), - for each upper leg switching device and each lower leg switching device (11, 12, 13, 14) a positive gate command connection path (G+) from a positive gate command output of a pre-driver (7) to provide a reset signal (RSTx, RSTy) for a respective further upper leg switching device and lower leg switching device (11, 12, 13, 14) gate pull down signal.

An exemplary Cascaded H-bridge or Modular Multilevel Converter / Inverter are disclosed that employ a H-bridge cell or half-bridge cell that includes a linking switch additionally employed between two H-bridge cells, i cell and i+1 cell, to allow a parallel number of cells to operate together. Each of the H-bridge cells includes the standard four switches and additionally the linking switch between two H-bridge cells. The system can beneficially have improved system conversion efficiency due to better DC energy source utilizations, e.g., for improved efficiency of converters that convert DC energy to AC energy. The cascading H-bridge cells (or half-bridge cells) can be configured as a charge pump converter, bidirectional 3-phase inverter, among other topologies.