589 results about "Half bridge" patented technology

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 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.

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.

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.

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.

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.

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.

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 belongs to the technical field of power management, and particularly relates to a high-precision double-edge zero dead zone control circuit for a GaN half bridge. The circuit comprises a sampling interface circuit, a falling edge dead zone control circuit and a rising edge dead zone control circuit, the sampling interface circuit is connected with an SW node of a GaN half bridge and samples the voltage of the SW node, the sampling interface circuit samples the node voltage to obtain a clamping voltage Vclamp and a negative voltage Vsen, the Vsen is input into the falling edge dead zone control circuit, and the Vclamp is connected with the rising edge dead zone control circuit. The Vsen is input to a rising edge dead zone control circuit; the falling edge dead zone control circuit is used for controlling the GaN half bridge according to the Vclamp; and the rising edge dead zone control circuit controls the GaN half bridge according to the Vsen. Noise interference can be effectively avoided, and finally high-precision and low-power-consumption zero dead zone control is achieved.

A monolithic half-bridge gate driver includes a phase node terminal configured to be coupled to a phase node to which a high-side transistor and a low-side transistor of a half-bridge are coupled; a diode comprising an anode and a cathode, wherein the cathode is coupled to the phase node terminal; and a comparator comprising a first input terminal coupled to the anode of the diode for receiving a measurement value indicative of a phase voltage at the phase node terminal, a second input terminal coupled to a threshold source for receiving a threshold, and an output terminal configured to output a comparison result indicating whether the measurement value satisfies the threshold. The phase node terminal is configured to be connected to a high-side supply potential by the high-side transistor, and is configured to be connected to a low-side supply potential by the low-side transistor.

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 invention discloses a current converter, a control method and a related product. The converter comprises three phases of bridge arm circuits, and each phase of bridge arm circuit in the three phases of bridge arm circuits comprises an upper half bridge arm and a lower half bridge arm which are connected in series; the upper half bridge arm and the lower half bridge arm comprise submodule modules and single-switch circuit modules which are connected in series, the submodule modules are connected close to the direct current side, and the single-switch circuit modules are connected close to the alternating current side; the sub-module module comprises a plurality of sub-modules which are connected in series, and the single-switch circuit module comprises a plurality of single-switch circuits which are connected in series; wherein the single-switch circuit comprises a controllable switch tube, a diode, an absorption circuit and a lightning arrester; the diode is in anti-parallel connection with two ends of the controllable switch tube, the absorption circuit is in parallel connection with two ends of the controllable switch tube, and the lightning arrester is in parallel connection with two ends of the controllable switch tube. According to the converter valve body, the single-switch circuit module is connected with the sub-module modules in series, so that the number of the sub-modules and the volume of capacitors in the sub-modules are reduced, and the power density of the converter valve body is increased.

The invention relates to the technical field of power electronics, in particular to a bipolar auxiliary adjustment quasi-single-stage DC / DC converter based on a four-quadrant DAB converter, which comprises an LLC-DCX main converter and a BHT-DAB auxiliary converter, the LLC-DCX main converter comprises a primary side H full bridge arranged at the input end of the LLC-DCX main converter, a secondary side H full bridge arranged at the output end of the LLC-DCX main converter and a main transformer arranged between the primary side H full bridge and the secondary side H full bridge; the BHT-DAB auxiliary converter comprises a secondary side half bridge arranged at the input end of the BHT-DAB auxiliary converter, a capacitor series circuit arranged at the input end of the BHT-DAB auxiliary converter and connected with the secondary side half bridge in parallel, and an auxiliary transformer arranged between the primary side H full bridge and the secondary side half bridge; the input end of the LLC-DCX main converter and the input end of the BHT-DAB auxiliary converter are connected in series to form the input end of the quasi-single-stage DC / DC converter. And the output end of the LLC-DCX main converter is the output end of the quasi-single-stage DC / DC converter. According to the invention, the overall efficiency of the converter under the rated input voltage can be improved, and meanwhile, the voltage regulation capability under the non-rated input voltage is considered.

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 invention belongs to the related technical field of industrial displacement measurement, and discloses a half-bridge strain gauge displacement sensor signal conditioning circuit which comprises a half-bridge Wheatstone circuit module with manual zero setting, an RFI filtering module, a primary instrument operational amplifier module, a secondary precision amplifier module, an RC filtering module and a reverse following module which are sequentially connected in series. The half-bridge Wheatstone circuit module comprises a manual zero setting half-bridge Wheatstone circuit module and is used for dynamically compensating millivolt-level offset voltage caused by tolerance of a strain gauge and a fixed-value resistor; the RFI filtering module is used for suppressing rectification errors caused by radio frequency interference; the RC filtering module is used for suppressing high-frequency noise and smoothing a signal waveform; the reverse following module is used for realizing impedance isolation; two resistors are connected into a half-bridge Wheatstone circuit to form a manual zero setting module, millivolt-level offset voltage caused by tolerance of a strain gauge and a fixed-value resistor is dynamically compensated, and the problem that a traditional bridge sensor is insufficient in offset voltage and signal-to-noise ratio is solved.

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 module for an inverter having first and second flat power semiconductors in a half bridge circuit, each having a drain connection on a first side and a source connection on the other side. The first side of the first power semiconductor faces the same direction as the second side of the second power semiconductor. A lower contact module thermally connects the first side of the first semiconductor and second side of the second semiconductor to a lower heat sink and electrically connects the drain on the first semiconductor to a first DC input and the source on the second semiconductor to a second DC input. An upper contact module thermally connects the second side of the first semiconductor and first side of the second semiconductor to an upper heat sink and electrically connects the source on the first semiconductor and drain on the second semiconductor to an AC output.