205 results about "Power inverter" patented technology

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.

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.

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.

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.

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.

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.

An alternating current (AC) motor system includes an AC motor with a rotor and a stator with multi-phase AC stator windings. The system also includes a power inverter that generates a multi-phase AC voltage, an AC bus that connects the power inverter to the stator windings, an AC choke that surrounds the AC bus, and a current sensor with a coil wound on or surrounded by the AC choke. The current sensor measures common mode current in the AC bus, and is used in pulse width modulation or slew rate control of the power inverter, ensuring smooth operation and reducing the risk of damage due to common mode current.

Certain embodiments provide a capacitor module with flexible busbar contacts for a traction inverter system of an electric vehicle. The capacitor module may include a housing, capacitors, and capacitor busbar contacts coupled to the capacitors. Each capacitor busbar contact may include a flexible portion and a contact portion configured to be attached to a respective power inverter module busbar contact. The flexible portion and the contact portion are disposed outside the housing. The flexible portion is configured to bend to reduce or close an air gap between the contact portion and a respective power inverter module busbar contact when a force is applied to the contact portion prior to attachment. In some embodiments, the contact portion is laser welded to the respective power inverter module busbar contact, and a clamp applies the force to the contact portion prior to laser welding.

Various techniques are described to control the rate of change of current (di / dt) and the rate of change of voltage (dV / dt) for power electronic switches with conventional gate drivers and a few additional components. By implementing these techniques, designers may achieve better control over the switching behavior, reduce losses, and improve the overall reliability and efficiency of their circuits. This is particularly important in applications such as power inverters, where high performance and reliability are important.

The invention provides an amplitude shift keying phase demodulation device, which comprises a zero-crossing comparator used for extracting a zero-crossing point position of a voltage difference between two ends of an output capacitor of a power transmission circuit; the pulse construction circuit is used for constructing a zero crossing point pulse signal by taking the zero crossing point position as a starting point; the phase signal construction circuit is used for generating an original phase signal according to the zero crossing point pulse signal and a square wave sequence output by a power inverter of the power transmitting circuit; and the bit data extraction circuit extracts the pulse width of the original phase signal by using a pulse counter to obtain multi-bit phase information, and obtains a single-bit ASK signal according to a comparison result of the multi-bit phase information. According to the device disclosed by the invention, a digital-to-analog converter commonly used in phase demodulation is directly canceled, the design cost and the production cost are reduced, and meanwhile, the communication quality problem of a large number of communication requirements in a wireless charging process is solved.

The utility model provides an electric power inverter power supply, a bunching mechanism comprises a storage basket, a wrapping post, a limiting frame, a limiting block, a spring, a stop block and a shifting piece, and the storage basket is arranged on the side wall of a machine body; the wrapping post is arranged on the inner bottom wall of the storage basket; the limiting frame is arranged on the outer wall of the wrapping post; the limiting block is arranged on the outer wall of the wrapping post; the spring is installed in the limiting block, and the check block is connected with the other end of the spring. The shifting piece is arranged on the side wall of the stop block; a sliding groove is formed in the side wall of the shifting piece. The upper wall and the lower wall of the storage basket are respectively provided with a wire outlet groove. According to the electric power inverter power supply provided by the embodiment of the utility model, in the process of converting electric power through the electric power inverter power supply, and in the process of connecting the electric power inverter power supply with other devices, the redundant part of the connecting wire can be separated and bunched, so that the electric power inverter power supply can be quickly positioned while being stored.

Cooling system for electronics, which includes: a housing (110) containing: a base section (120) with sides (121) and a bottom surface (123) that define a cavity; and a cover section (116) that encloses the base section (120) and contains cooling elements (118, 119) attached to it; electronic components; a shield (244) which is arranged in the cavity between the electronic components and the cover section (116); a vertical element arranged below the shield (244) to define a first fluid chamber between one side of the vertical element and one side of the base section (120) and a second fluid chamber between an opposite side of the vertical element and another side of the base section (120), wherein the electronic components are arranged in the second fluid chamber; and a cooling fluid (260) arranged in the cavity and having a fluid level below at least one section of the shielding (244), and either: the housing (110) is mounted at an angle of inclination relative to the horizontal; or the housing (110) is mounted parallel to the horizontal and the shielding (244) is mounted at an angle of inclination relative to the horizontal; characterized by the fact that an upper edge of the vertical element is connected to an edge of the shield (244); or that an upper edge of the vertical element and an edge of the shield (244) are arranged below the fluid level; or that a lower edge of the vertical element contains several openings to allow a fluid to flow from the first fluid chamber to the second fluid chamber; or that the vertical element contains a gate printed circuit board (gate PCB) (254); or that the electronic components comprise at least one power inverter (250), busbars (210), a current sensor (253) and a volume capacitor (224); or that the electronic components comprise: a power inverter module (250) containing several circuit breakers; a current sensor (253) which is connected to the power inverter module (250) via first busbars (210); AC busbars (128) connected to the current sensor (253); a volume capacitor (224) which is connected to the power inverter module (250) via second busbars (210); and DC busbars (132) connected to the volume capacitor (224).

This invention relates to the field of inverter technology, and particularly to a heterogeneous power device hybrid inverter and its space vector modulation method. The heterogeneous power device hybrid inverter provided in this invention includes a first constant current source, a second constant current source, a main power inverter module, a secondary power inverter module, and a capacitive reactance module. The first constant current source is connected to the main power inverter module to provide current to the main power inverter module. The main power inverter module includes multiple silicon-based insulated-gate bipolar transistors (SBMTs) as main switching transistors, and the main power inverter module is connected to the capacitive reactance module. The second constant current source is connected to the secondary power inverter module to provide current to the secondary power inverter module. The secondary power inverter module includes multiple silicon carbide-based metal-oxide-semiconductor field-effect transistors (MOSFETs) as secondary switching transistors, and the secondary power inverter module is connected to the capacitive reactance module. The heterogeneous power device hybrid inverter and its space vector modulation method provided by this invention can balance high inverter frequency and low switching losses.

The utility model discloses a seven-level inverter topology, which relates to the technical field of multi-level structures and comprises an upper bridge arm and a lower bridge arm, the upper bridge arm and the lower bridge arm are mutually symmetrical except for the direction of a diode, and a plurality of switch tubes, direct current bus capacitors and flying capacitors in the upper bridge arm and the lower bridge arm are connected according to a specific rule. Working modes with seven different output voltages are realized by controlling the conduction state of the switch tube; the topology realizes voltage division through the DC bus capacitor, realizes intermediate level transition through the flying capacitor, combines an optimized circuit structure and a control strategy, has the advantages of simple circuit design, high efficiency, stable output voltage and the like, and is widely applicable to high-voltage and high-power inverter systems.

The utility model relates to a novel high-power inverter power supply. Comprising a battery access module, a pre-stage circuit module, a post-stage circuit module, a protection module, a heat dissipation module, a control module and a state display module, wherein the pre-stage circuit module mainly comprises a pulse width modulation signal generation circuit, a push-pull circuit, a switch switching circuit, a booster circuit, a rectification filter circuit and an auxiliary power supply circuit. According to the utility model, the contradiction that the current inverter power supply cannot be compatible to start an impact load and ensure long-time work under high power is solved, the service life is prolonged, the stability is improved, and the inverter power supply is energy-saving, environment-friendly and low in noise.

This application provides a power supply system and grid-connected control method. The power supply system includes a power source, an inverter, a transformer, a power station acquisition module, and an inverter acquisition and control circuit. The power station acquisition module acquires the amplitude and frequency of the grid-connected voltage at the grid connection point and obtains a power station power adjustment signal based on the amplitude and frequency of the grid-connected voltage. The inverter acquisition and control circuit acquires the amplitude and frequency of the inverter's output voltage and obtains an inverter power adjustment signal based on the amplitude and frequency of the output voltage. Based on the power station power adjustment signal and the inverter power adjustment signal, the circuit controls the inverter to output a target output power. Using this application, the output power of the inverter can be adjusted through the power station acquisition module and the inverter acquisition and control circuit. The structure is simple, the control method is convenient, the control accuracy and regulation efficiency are improved, the control time is reduced, and the control cost is lowered.

The utility model relates to the technical field of thin-film capacitors, in particular to a three-level thin-film capacitor, which not only can meet the requirement of high capacity required by a high-power inverter, but also can reduce the occupied space in an inverter module and is convenient to install, and comprises a capacitor shell and a capacitor core, the capacitor core comprises three core groups which are arranged in the same capacitor shell, each core group is composed of two groups of cores which are connected in parallel, two ends of each core group are fixedly connected with welding copper plates, the welding copper plates are connected with busbars provided with electrode through holes, extraction electrodes penetrate through the electrode through holes, and the extraction electrodes are connected with the busbars. The core is a flat core formed by winding a metalized film.

A power electronics converter may include: a converter commutation cell having a power circuit and a gate driver circuit, the power circuit including at least one power semiconductor switching element and at least one capacitor, wherein each power semiconductor switching element is embedded in a solid insulating material, wherein each power semiconductor switching element has at least three terminals including a gate terminal, wherein the gate driver circuit is electrically connected to and configured to provide switching signals to the gate terminal of each power semiconductor switching element, wherein a peak rated power output of the power electronics converter is greater than 25 KW, and wherein a total rated capacitance of the power circuit of the converter commutation cell divided by the peak rated power output of the power electronics converter is less than or equal to 5 nF / W.

The application discloses a three-level inverter harmonic suppression method based on zero vector symmetrical reconstruction and spread spectrum composite modulation, and the method comprises the following steps: step 1, signal acquisition and voltage instruction acquisition; step 2, spread spectrum modulation parameter setting; step 3, basic vector action time calculation; step 4, zero vector symmetrical reconstruction of vector sequence; step 5, switch time calculation and register updating; and step 6, PWM signal generation and system closed loop operation. The application realizes full-band suppression of inverter output PWM harmonics by deeply fusing the zero vector symmetrical reconstruction technology and the spread spectrum modulation technology. The application can be applied to a permanent magnet synchronous motor driving system powered by a three-level voltage source inverter, can simultaneously suppress the PWM harmonic amplitude near the odd carrier frequency and the even carrier frequency, effectively reduces electromagnetic vibration and noise, and has extremely high application value in the field of high-power inverters and motor drives.

The invention relates to a system and method for motor-based power transfer. The power transfer system includes: a traction battery pack; a power inverter module configured to be in electrical communication with the traction battery pack; and rotating the electric machine. The rotating electrical machine is in electrical communication with the AC bus and includes a first set of windings in electrical communication with the AC bus and a second set of windings in electrical communication with the output AC bus. The power outlet is in electrical communication with the second set of windings via the output AC bus. The controller is in electrical communication with the power inverter module. The controller is configured to selectively direct the power inverter module to direct alternating current through the alternating current bus to the rotating electrical machine to produce a desired output power at the power outlet.

Described herein are oil-cooled power inverters having various features enabling efficient cooling and compact design. For example, an oil-cooled power inverter may comprise a power inverter PCB comprising a plurality of power transistors thermally coupled to liquid-cooled blocks. Cooling fluid is distributed to the liquid-cooled blocks from a volume partially defined by a manifold and the power inverter PCB. A power inverter board may electrically connect with a plurality of terminals and have pass-throughs enabling cooling liquid to pass from the volume, through the PCB, to the liquid-cooled blocks, while preventing cross-flow of cooling fluid between channels. When the cooling fluid is a dielectric fluid, arrangement of components enables direct contact of the cooling fluid with some electrically active components. The power transistors may be thereby cooled by contact with the liquid-cooled blocks. Arrangement of components enables both efficient liquid cooling and compact design of the oil-cooled power inverter.

A power inverter includes first and second inputs and a plurality of power switches in communication with the first and second inputs. First, second and third outputs communicate with the plurality of power switches. First, second and third conductors are configured to connect the first, second and third outputs to an electric machine. Each of the first, second and third conductors comprise a plurality of twisted and segmented wires.

The present disclosure relates to a choke system for reducing common mode current in an AC drive system. The present disclosure addresses common mode current and bearing current in an alternating current (AC) drive system by using an AC choke assembly integrated with a shielded coaxial electrical cable. This design weakens common mode current and ensures electromagnetic compatibility. The AC choke assembly includes a magnetic core with an axial bore that receives a coaxial electrical cable. The cable is surrounded by a metal housing and insulated by a dielectric separator. An optional dielectric outer cover may further insulate the metal housing. Thermal interface pastes may be used to maximize heat transfer between layers of an AC choke. One side of the metal housing is connected to the first set of coaxial cable shield ends, or the other side may be connected to a traction drive unit (TDU) or a traction power inverter module (TPIM). Alternatively, the AC choke may be located in a middle section of the coaxial cable.

An electrical connection interface (10) comprising a set of connection elements for high-voltage power transmission cables (620, 630, 640) and intended for connection to an electrical cabinet (101). According to its main feature, the interface comprises a set of insulated conductive busbars (21, 22, 23, 31, 32, 33, 41, 42, 43), grouped in three busbar configurations (20, 30, 40); the busbars being fixed and rigid, they are configured to provide an electrical connection between the connection elements and the cabinet in such a way as to facilitate the interchangeability of the electrical cabinet. The invention also relates to a simplified method for connecting and disconnecting the electrical cabinet from a high-voltage power transmission cable network. Figure 1

A control system for a horizontal directional drilling machine includes a drive system having an on-board charger and a power inverter for providing current to an electric motor. The hydraulic system includes an input shaft driven by an electric motor. A battery system includes a battery pack and a battery management system. The cooling system includes a pump, a flow control device, and a coolant temperature sensor. The controller is configured to control the cooling system to provide battery coolant to the battery pack in response to a voltage, a current, a battery coolant temperature, a battery charge state, and a condition of the battery pack received from the battery management system. The controller is configured to control the on-board charger by providing an on-board current setpoint in response to the data received from the power inverter and the state of charge and condition of the battery pack.

A power inverter system, a method for forecasting available power, and a method for dynamically shedding / loading one or more outlets.