470 results about "Power inverter" patented technology

An electric machine is provided. A polyphase machine is provided. A power inverter is electrically connected to the polyphase machine. A controller is electrically connected to the power inverter, wherein the controller provides switching signals to the power inverter, wherein the controller comprises a trajectory calculator that provides an optimized trajectory for transitioning the polyphase machine from a first torque to a second torque.

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 belongs to the technical field of unmanned aerial vehicle full-aviation electromagnetic detection, and particularly relates to a full-aviation frequency domain electromagnetic emission system and a control method. A broadband frequency mixing and matching circuit is connected in series between an H-bridge power inverter and an emission coil of an unmanned aerial vehicle electromagnetic emission system; the broadband mixing and matching circuit comprises a first resonance unit formed by connecting a fixed capacitor and an adjustable inductor in parallel and a second resonance unit formed by connecting a fixed capacitor and an adjustable inductor in parallel, and the first resonance unit and the second resonance unit are connected in series. The adjustable inductor is matched with the dynamic impedance of the inductive load by adjusting the inductance value, and the broadband frequency mixing and matching circuit can adjust the impedance in real time, so that the matching of different resonant frequencies is realized, and the frequency range of a matching signal can be obviously widened.

The invention relates to the technical field of inverter control, and discloses a VSG-based inverter phase-locked loop-free pre-synchronization method, system and device and a medium, and the method comprises the steps: eliminating the voltage deviation between the VSG inverter voltage of a virtual synchronous generator and the output voltage of a micro-grid through a deviation integral feedback method; a general signal delay superposition operator is adopted to filter the power grid voltage so as to construct virtual power, then the virtual power is introduced into an active-frequency loop of the virtual synchronous generator as a feedback signal, and a power angle feedback control model is formed so as to adjust the VSG inverter voltage; and detecting the voltage deviation between the power grid voltage and the adjusted VSG inverter voltage in real time, and when it is judged that the voltage deviation is smaller than a deviation threshold value, generating a grid-connected connection point switching-on instruction and controlling a switch of a grid-connected connection point to be switched on, so that phase-locked loop-free pre-synchronization of the distributed power supply inverter is realized, the grid-connected stability of the distributed power supply inverter is enhanced, and the grid-connected stability of the distributed power supply inverter is improved. And the current and voltage impact of the grid-connected instant system is reduced.

The invention discloses a differential closed-loop control method and device for a dual-frequency induction heating power supply inverter, and belongs to the technical field of induction heating power supplies, and the method comprises the steps: carrying out the learning and analysis of a control frequency relation of the dual-frequency induction heating power supply inverter through a deep learning method, and determining an optimal control frequency; a multi-level inverter is used as a power supply inverter for dual-frequency induction heating; s2, according to the optimal control frequency determined in the step S1, performing differential closed-loop control on the output frequency of the multi-level inverter by adopting a control method combining PWM control and PM control; pWM and PM control parameters are dynamically adjusted through a real-time adjustment mechanism of differential closed-loop control. According to the invention, the frequency adjustment precision and the power output stability of the dual-frequency induction heating power supply inverter are improved.

Devices and methods are disclosed for high power inverter modules with enhanced thermal and mechanical performance, for use in electric vehicles. The disclosed devices feature enlarged clips that cover an entire die, to distribute mechanical forces, thus preventing die cracks for improved reliability. In these power modules, semiconductor dies are sandwiched between a three-layer direct bond metal (DBM) structure and the enlarged clip. A pre-molded clip assembly can be used that includes integrated metalliization to eliminate the need for external wire bonds. Alternatively, semiconductor dies can be inverted in a flip-chip configuration to face a modified DBM structure that integrates the metallization. Simulations of the disclosed power inverters indicate improved efficiency in dissipating heat.

A marine AC generator system includes a marine generator driven by an internal combustion engine and configured to generate an AC current and a rectifier configured to rectify the AC current to provide a DC current. At least one battery is configured to receive and be charged by the DC current. A battery powered inverter is configured to be powered by the at least one battery and to generate a variable current output frequency such that an AC electrical power is provided to a load when the marine generator is not running.

The utility model relates to the technical field of electric power equipment, and discloses a heat dissipation and cooling mechanism for an electric frequency converter for a wind farm, comprising a mounting frame, a fin, a fixing bolt, a handle and a rapid heat dissipation component, wherein the fin is arranged inside the mounting frame, the fixing bolt is arranged on the top of the mounting frame, the handle is fixedly connected to one side of the mounting frame, the rapid heat dissipation component is installed on the outside of the fin, the rapid heat dissipation component comprises an outer shell, a dust shield, a movable frame, a moving block, a cleaning scraper, a driving component, a support frame and a fan, and the outer shell is screwed to the outside of one end of the fin. The heat dissipation and cooling mechanism for an electric frequency converter for a wind farm, by installing a fan in the outer shell, accelerates the heat conduction of the fin through the action of the fan, thereby improving the heat dissipation efficiency of the electric frequency converter, and by setting the dust shield, dust is prevented from entering the inner part of the outer shell and adhering to the outside of the fin, thereby reducing the heat dissipation efficiency of the fin.

The present invention provides a DC power supply system and a DC arc detection method and device thereof, which simultaneously collect the AC signal and various DC signals of an inverter; when there is external noise introduced into the AC side of the inverter, the noise can be crosstalked to its DC side through the inverter; and the operation of the inverter itself may also cause noise, and the noise may appear on both sides of it at the same time; therefore, according to the AC signal and the various DC signals, it can be judged whether the DC power supply system has noise interference; if there is noise interference, the arc detection data is denoised, so that the arc detection data can be adjusted according to the actual noise situation of the system; and then according to the data results after denoising, it is judged whether the inverter has arcing; compared with the prior art, it can reduce the false alarm rate and improve the detection rate, and can be applicable to the situation where high-power inverters or inverters with nonlinear loads are prone to harmonic deterioration.

The invention discloses an inverter circuit, a chip and electronic equipment, and relates to the technical field of electronic equipment. The inverter circuit comprises a booster circuit, an inverter and a reference voltage generation circuit, the input end of the booster circuit is coupled with a power supply; the first input end of the inverter is coupled with the output end of the booster circuit, and the output end of the inverter is used for coupling a load; the input end of the reference voltage generation circuit is coupled with the output end of the booster circuit, and the output end of the reference voltage generation circuit is coupled with the second input end of the inverter; the reference voltage generation circuit is used for receiving a voltage signal output by the output end of the booster circuit, the reference voltage generation circuit is further used for sampling the voltage signal, generating reference voltage and outputting the reference voltage to the second input end of the inverter, and the reference voltage comprises voltage generated according to the minimum sampling voltage. According to the scheme, fidelity high-voltage sine driving signals can be obtained through the inverter circuit.

A power management system for an elevator system. A power management system for an elevator system includes a power converter having three input terminals, two of the three input terminals coupled to a main power source for supplying single-phase AC power to the power management system, the power converter configured to convert the AC power from the main power source into DC power on a common DC bus, a secondary power source for supplying DC power to the common DC bus, a power inverter configured to invert the DC power on the common DC bus into AC output power for driving an electric motor of the elevator system, and a dynamic braking resistor which is coupled between a third input terminal among the three input terminals of the three-phase power converter and the common DC bus.

A method of operating a power inverter for an electric machine includes selecting an inverter switching technique; determining a frequency range of an inverter switch; determining a direct current (DC) voltage range of the inverter switch; determining an optimal switching map including inverter switching techniques and frequency selections for each value of torque-rate on the torque-rate curve; and controlling switches included in the power inverter using the optimal switching map.

The electrified powertrain of a vehicle includes a battery pack connected to a traction power inverter module (TPIM), which converts a direct current (DC) voltage from the battery pack to alternating current (AC). A rotating electric machine includes a stator, which is excited by the AC voltage from the TPIM, and enclosing a rotor core that can rotate. The rotor core contains recesses that hold conductive bars and permanent magnets, with the conductive bars positioned closer to the center of the rotor core. The conductive bars and permanent magnets are separated by gaps in each recess. An annular end ring assembly is present at one end of the rotor core and has connecting conductors that are connected to subsets of conductive bars and a secondary coil of a rotary transformer. When the stator is excited, the rotor shaft, which is connected to the rotor, rotates.The electric machine drives a gearbox that is coupled to the rotor shaft.

A multi-phase power inverter for an electric propulsion system includes a plurality of X-type multilevel power converters arranged between a high-voltage direct current (DC) power supply and an electric machine. Each of the plurality of X-type multilevel power converters is a solid-state integrated circuit (IC) that includes a positive DC power bus, a negative DC power bus, a neutral bus, and a plurality of semiconductor switches disposed in a stacked arrangement. The plurality of semiconductor switches is interconnected via the positive DC power bus, the negative DC power bus, and the neutral bus.

An electrified powertrain of a vehicle includes a battery pack linked to a traction power inverter module (TPIM) that converts a DC voltage from the battery pack to an AC voltage. A rotating electrical machine includes a stator excited by an AC voltage of a TPIM, surrounding a rotatable rotor core. The rotor core includes slots that accommodate conductive strips and permanent magnets, the conductive strips being positioned closer to the center of the rotor core. The conductive strip and the permanent magnet are separated by a gap within each slot. An annular end ring assembly is present at one end of the rotor core, characterized in that the terminal conductors are connected to a subset of the conductive strips and the secondary coil of the resolver. When the stator is energized, a rotor shaft connected to the rotor rotates. An electric machine powers a transmission coupled to the rotor shaft.

A gate driver system for a multi-phase inverter includes a gate controller, a gate driver circuit, and a hybrid switch power module integrated into a phase leg of the multi-phase inverter. The hybrid switch power module includes a first semiconductor switch connected in parallel with a second semiconductor switch. The first semiconductor switch has first conduction characteristics, while the second semiconductor switch has second performance characteristics. The gate driver circuit includes a gate driver, a first variable resistance circuit, and a second variable resistance circuit. The first variable resistance circuit is powered by a first low-voltage DC power bus, while the second variable resistance circuit is powered by a second low-voltage DC power bus.The first variable resistance circuit is connected to a first gate of the first semiconductor switch, while the second variable resistance circuit is connected to a second gate of the second semiconductor switch.

The invention discloses intelligent power inverter production line equipment and a use method thereof, and belongs to the technical field of inverter production. Intelligent power inverter production line equipment comprises a base, and further comprises a main conveyor arranged at the top of the base and used for conveying an assembled inverter, and an assembling part is arranged on the upper side of the main conveyor; the detection seat is arranged at the tail end of the main conveyor, a supporting plate is fixedly arranged on the side edge of the detection seat, and a camera used for detecting the type of the inverter is arranged on the supporting plate; the lifting seat is arranged between the main conveyor and the detection seat; only one driving motor needs to be controlled, the pushing work of the pushing plate on the inverter and the continuous action that the pushing plate is not hindered by the inverter to move back after pushing are completed can be achieved, operation is easy, and the conveying efficiency and the conveying effect of the inverter are guaranteed.

A power inverter is provided. The power inverter includes: first, second and third legs configured to output alternating voltages having different phases. Each the first leg, the second leg, and the third leg includes: a first power metal oxide semiconductor field effect transistor (MOSFET) on a SiC substrate, and connected between a power terminal of direct current voltage and an output terminal configured to output a voltage of a corresponding phase among the first phase, the second phase and the third phase; a second power MOSFET on the SiC substrate, and connected between the output terminal and a ground terminal; and a redundancy circuit including a redundancy power transistor configured to replace the first power MOSFET based on the first power MOSFET failing and replace the second power MOSFET based on the second power MOSFET failing.

An on board charger for a vehicle including an electric machine and a battery system includes a power inverter and a DC-DC converter. A filter including first and second inputs is selectively connected to an AC source and first and second outputs. The first output of the filter is connected to one of the first node, the second node, and the third node between switches of phase legs of the power inverter. A switching device includes a first terminal connected to the one of the first node, the second node, and the third node, a second terminal connected to a second output of the filter, and a third terminal connected to one of the first, second, and third phase windings of the electric machine corresponding the one of the first node, the second node, and the third node.

A system to generate weld power for a welding process comprises: a power supply including a power inverter having multiple switches controlled by multiple switching signals such that each switch is alternately turned ON and OFF within each switching cycle of one of the multiple switching signals, to supply a current to an output circuit of the power supply that is configured to convert the current to the weld power, wherein the power inverter includes a capacitor and a capacitor switch connected in series with each other and across a switch of the multiple switches; and a controller to monitor a weld parameter and control the capacitor switch to either connect the capacitor across, or disconnect the capacitor from, the switch continuously across multiple cycles of a respective one of the multiple switching signals, depending on whether the weld parameter meets a predetermined operating condition of the welding process.

The invention discloses a high-power inverter and a control method thereof, and belongs to the technical field of power electronics, the high-power inverter comprises a sensing enhanced magnetic assembly, the sensing enhanced magnetic assembly comprises a high-thermal-conductivity metal shell, a magnetic core arranged in the high-thermal-conductivity metal shell, a main power coil, a high-precision sensing coil and an integrated thermal probe; wherein the high-precision sensing coil is wound by clinging to a central column of the magnetic core, the main power coil is coaxially wound on the outer side of the high-precision sensing coil, and the magnetic core, the main power coil and the high-precision sensing coil jointly form an inductor core body. According to the invention, the controller can monitor the working point of the magnetic core on the magnetization curve in real time, so that the margin of the magnetic core away from the magnetic saturation state is directly judged.

A 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.

A vehicle's electrified powertrain includes a battery pack linked to a traction power inverter module (TPIM) converting DC voltage from the battery pack into AC voltage. A rotary electric machine includes a stator energized by the TPIM's AC voltage, enclosing a rotor core capable of rotation. The rotor core contains slots holding conductive bars and permanent magnets, with conductive bars positioned closer to the rotor core's center. The conductive bars and permanent magnets are separated by gaps within each slot. An annular end ring assembly is present at one end of the rotor core, featuring terminal conductors connected to subsets of conductive bars and a secondary coil of a rotary transformer. When the stator is energized, the rotor shaft, connected to the rotor, rotates. The electric machine powers a transmission, which is coupled to the rotor shaft.

Systems, devices, and methods for controlling grid-tied inverters with instantaneous synchronization and low-voltage-ride-through (LVRT) capabilities under a wide range of grid cable impedance without using a phase-locked loop.

The utility model discloses a heat dissipation device of a photovoltaic inverter, which comprises an inverter main body, and a first internal device to be subjected to heat dissipation and a heat pipe heat exchanger are accommodated in the inverter main body; the heat pipe heat exchanger comprises a plurality of heat pipes, upper cooling fins, lower cooling fins and a heat exchanger substrate, and the upper cooling fins and the lower cooling fins are arranged on the upper portion and the lower portion of the heat exchanger substrate respectively. The heat pipe heat exchanger and the inverter body are fixed through the heat exchanger substrate, the part where upper cooling fins of the heat pipe heat exchanger are located is arranged in the inverter body, the part where lower cooling fins of the heat pipe heat exchanger are located is arranged outside the inverter body, and the heat pipe heat exchanger and the inverter body are fixed through the heat exchanger substrate. Heat in the inverter is transferred to the external environment, the problem that the temperature of the internal environment of the high-power inverter is too high can be effectively solved, the internal air duct and the external air duct are completely independent and do not restrict each other, the overall size of a case cannot be obviously increased, and IP protection and the anti-corrosion grade can be achieved.

An axial flux motor assembly is disclosed and includes: an axial flux motor comprising a rotor, and a first stator; and a power inverter assembly. The power module assembly includes: a printed circuit board; a control module mounted on the printed circuit board; power module assemblies connected to the printed circuit board and controlled by the control module; and a cold plate. The cold plate is disposed between the first stator and the power module assemblies and includes a first side and a second side, which is opposite the first side. The cold plate cools the power module assemblies via the first side and the first stator via the second side.

A vehicle's electrified powertrain includes a battery pack linked to a traction power inverter module (TPIM) converting DC voltage from the battery pack into AC voltage. A rotary electric machine includes a stator energized by the TPIM's AC voltage, enclosing a rotor core capable of rotation. The rotor core contains slots holding conductive bars and permanent magnets, with conductive bars positioned closer to the rotor core's center. The conductive bars and permanent magnets are separated by gaps within each slot. An annular end ring assembly is present at one end of the rotor core, featuring terminal conductors connected to subsets of conductive bars and a secondary coil of a rotary transformer. When the stator is energized, the rotor shaft, connected to the rotor, rotates. The electric machine powers a transmission, which is coupled to the rotor shaft.

A multi-phase power inverter for an electric propulsion system includes a plurality of T-type multilevel power converters arranged between a high-voltage direct current (DC) power supply and an electric machine. Each of the plurality of T-type multilevel power converters is a solid-state integrated circuit that includes a positive DC power bus, a negative DC power bus, a neutral bus, and a plurality of semiconductor switches disposed in a stacked arrangement. The plurality of semiconductor switches is interconnected via the positive DC power bus, the negative DC power bus, and the neutral bus.

A mobile computer numerical control (CNC) system may include a motor vehicle that includes a first container defining an enclosed compartment; a CNC machine mounted on the motor vehicle and positioned inside the enclosed compartment; a battery that is constructed and arranged to provide power to at least the CNC machine; and a power inverter that is in electrical communication with the battery and the CNC machine, wherein the power inverter is constructed and arranged to convert a direct current (DC) from the battery to an alternating current (AC), and wherein the power inverter is further constructed and arranged to provide at least the CNC machine with the AC current.

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.