100 results about "Power inverter" patented technology

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.

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.

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.

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.

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 technique for recursively determining the modulation index for controlling a DC-AC inverter is disclosed. The modulation index can first be selected. The input voltage to the power inverter can be measured. Based on the input voltage and the selected modulation index, the output voltage of the power inverter may be estimated. The output current of the power inverter can be measured. Using the estimated output voltage and the measured output current, the active power and reactive power can be determined. Using the active power and reactive power, the updated modulation index can be determined. The updated modulation index coefficient can be used to generate a pulse-width modulated signal used to control the power inverter.

A method for manufacturing a power inverter may include determining several electrical properties of both a first and a second power switch chip. These several electrical properties include at least a conduction loss and a switching loss. Furthermore, the method may include manufacturing the power inverter at least partially using both the first and second power switch chips based on the several electrical properties of both.

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

The invention relates to a solid-state switch fault protection system for a direct-current power distribution system, which is applied to a ship direct-current power distribution system, the ship direct-current power distribution system comprises a direct-current bus, the direct-current bus is divided into a left direct-current bus and a right direct-current bus, and the left direct-current bus and the right direct-current bus are connected through a solid-state switch. The solid-state switch fault protection system comprises an energy management system, a converter and the like which are connected with a ship direct-current power distribution system, a power supply is connected with a direct-current bus through the converter, a propelling system is connected with the direct-current bus through a motor driver module, and a side propelling system is connected with the direct-current bus through a power inverter module. The energy management system adopts a redundant PLC control system based on a looped network so as to quickly monitor faults of the solid-state switch, and can quickly provide a control scheme according to an online system. In addition, the system has the advantages of good stability, safety and the like.

The invention relates to an electric machine having a rotor including high and low coercivity permanent magnets and a system for re-magnetization. A vehicle includes a permanent magnet electric machine including a rotor including a first permanent magnet and a stator including a winding. A power inverter is connected to the windings of the stator. The controller is configured to estimate a magnetization level of the first permanent magnet in response to a flux of the permanent magnet motor and the back electromotive force. The controller is configured to determine at least one of an amplitude and a duration of the magnetization current pulse based on a magnetization level of the first permanent magnet. The controller is configured to supply a magnetization current pulse to the winding of the stator using the power inverter when the vehicle is stationary to perform at least one of re-magnetizing and adjusting a magnetization level of the first permanent magnet of the rotor.

An integrated power electronics (IPE) module is provided. The IPE module includes an IPE housing including at least one panel and a power inverter module (PIM) carrying the IPE housing. The PIM is housed within the interior chamber. The panel includes an acoustic black hole plate having an acoustic black hole region including at least one acoustic black hole. Each acoustic black hole includes a geometric center and a damper. The acoustic black hole plate has a reduced acoustic black hole plate thickness from the outer edge of the acoustic black hole to the geometric center, the reduced acoustic black hole plate thickness capturing vibrational energy resulting in efficiency attenuation. A damper is coupled to the acoustic black hole plate and is geometrically centered.

A motor control system, vehicle, and method for generating motor heat while maintaining an offset motor torque during stationary vehicle operation is presented. A method of operating an AC motor includes a resident or remote vehicle controller receiving a mode request to operate the vehicle in a stationary mode and a temperature request including the AC motor to generate motor heat during the stationary mode of operation. The controller determines an offset motor torque to generate the motor heat while operating the vehicle in the stationary mode and maintain an output member of the AC motor at a selected position. Using a DQ transform model of the AC motor, the controller selects a plurality of dq current trajectories based on the offset motor torque, the dq current trajectories located in respective dq operating quadrants of the DQ transform model. The controller then commands a power inverter to deliver current to the AC motor based on the selected dq current trajectory.

A power transmission system includes a traction battery pack, a power inverter module configured in electrical communication with the traction battery pack, and a rotating electric machine. The rotating electric machine communicates electrically with the AC bus and comprises a first set of windings in electrical communication with the AC bus and a second set of windings in electrical communication with an output AC bus. A socket communicates electrically with the second set of windings via the output AC bus. A controller communicates electrically with the power inverter module. The controller is configured to selectively instruct the power inverter module to direct AC current through the AC bus to the rotating electric machine to produce a desired output power at the socket.

A configurable heat sink for power inverters is provided for dissipating heat generated by an associated power inverter. The configurable heat sink may include coolant fluid channels inside a heat sink body through which coolant fluid circulates. A first manifold includes a single inlet / outlet orifice through which coolant fluid enters the heat sink body and a single inlet / outlet orifice through which heated coolant fluid exits the heat sink body. A second manifold includes three inlet / outlet orifices. Coolant fluid may pass into the heat sink body via two of the inlet / outlet orifices and out of the third inlet / outlet orifice or into one of the three inlet / outlet orifices and out of the other two inlet / outlet orifices. Turbulators or channel fins may be installed or extruded into the coolant fluid channels for causing coolant fluid to experience turbulent flow though the heat sink.

The application discloses a kind of aero-engine ignition device health condition monitoring system, including engine ignition device and sampling circuit, signal acquisition circuit and health management system, the engine ignition device includes ignition power inverter circuit, power boost transformer, energy storage charging circuit, discharge control circuit and discharge output circuit connected in sequence, the energy storage charging circuit is connected to the sampling circuit, the signal acquisition circuit and ignition power inverter circuit, discharge output circuit, sampling circuit are connected respectively, and the health management system is connected with signal acquisition circuit.Based on the system, a kind of aero-engine ignition device health condition monitoring method is provided, by special engine ignition device, and the signals of three different positions in ignition device are collected and monitored, the signals of three different positions are monitored, and the health condition of engine ignition device is monitored as a whole.

This disclosure relates to common-mode and bearing currents in AC drive systems by using an AC choke assembly integrated into shielded electrical coaxial cables. This design reduces common-mode currents and ensures electromagnetic compatibility. The AC choke has a magnetic core with an axial bore that accommodates the electrical coaxial cables. The cables are enclosed in a metal housing and insulated by a dielectric separator. An optional dielectric outer cover can further insulate the metal housing. Thermal paste can be used to maximize heat conduction between the different layers of the AC choke. One side of the metal housing is connected to a first set of coaxial cable shields, and the other side can be connected to a traction drive unit (TDU) or a traction power inverter module (TPIM).Alternatively, the AC choke can also be located in a middle section of the coaxial cables.

The application relates to the technical field of inverter control, and proposes an HJI inverter robust control method based on a disturbance observer. The method can effectively control a second-order system in the case of external disturbance, uncertainty and unknown disturbance. In order to eliminate the time delay influence of a remote signal on output feedback during transmission, a second-order disturbance observer is used to identify external disturbance. In addition, an SMC control law is designed according to HJI theory to improve the robustness of the system, and the stability of the system is analyzed by using the second Lyapunov method. Compared with the prior art, the application can effectively improve the control of the second-order system, and verifies the feasibility of the theory on an auxiliary power inverter.

A heat sink for a power inverter assembly in a motor vehicle comprises a base having a lower surface and an opposing upper surface. The lower surface contacts (indirectly or directly) a heat-generating device. A plurality of fins extend from the upper surface of the base. Some of the fins are aligned with the heat-generating device, while others are not. The fins can have different thermal conductivities. For example, each fin in a first subset of the plurality of fins is made of a first material and a second material, wherein the first material has a higher thermal conductivity than the second material. Each fin in a second subset of the plurality of fins is made of the second material and is substantially free of the first material.

A multiphase power inverter containing several X-type multistage power converters designed to transfer electrical power between a high-voltage direct current (HVDC) supply and an electrical machine. Each of the multiple X-type multistage power converters is configured as a solid-state integrated circuit (SEC) containing folded branches that include multiple semiconductor switches and clamping diodes. The multiple semiconductor switches, a positive DC power bus, a negative DC power bus, a first AC bus, a second AC bus, a third AC bus, a fourth AC bus, and the clamping diodes are arranged in multiple stages.Such that both the positive DC power bus and the negative DC power bus are parallel to the neutral bus, which generates mutual inductance rejection that minimizes parasitic inductance by coupling the positive mutual inductance and the negative mutual inductance for commutation loop currents in each of the X-type multi-stage converters.

Systems and methods are disclosed for performing fault detection and prediction for power electronics and switching devices for power electronics, such as power inverters. Systems and methods disclosed herein can include determining, by a partial least squares model that evaluates values for one or more switching parameters for a switching device, the one or more switching parameters selected from a first set of switching parameters, a predicted value for the on-state current Ids of the switching device. The predicted value for the on-state current Ids can be based on the values of the one or more switching parameters for the switching device. Systems and methods disclosed herein can determine a residual comprising the difference between the predicted value for the another switching parameter of the switching device and an actual value of the predicted value for the another switching parameter, and generate a test statistic based on the residual.

A method for manufacturing a power inverter may include determining a plurality of electrical characteristics of each of a first power switch die and a second power switch die. The plurality of electrical characteristics includes at least: a conduction loss and a switching loss. The method further may include manufacturing the power inverter using at least the first power switch die and the second power switch die based at least in part on the plurality of electrical characteristics of each of the first power switch die and the second power switch die.

The invention discloses a dual-frequency induction heating power supply inverter output frequency control method, terminal equipment and a storage medium. In order to solve the problems that high-frequency and low-frequency resonance points drift and output frequency is difficult to track smoothly due to the fact that load equivalent parameters change along with working conditions, the method calculates amplitudes and phase differences of high-frequency and low-frequency channels according to output voltage and current sampling, constructs impedance parameters to estimate high-frequency and low-frequency target resonance frequencies, and obtains a constraint target frequency vector in combination with a preset working frequency band. A discrete time frequency trajectory controller is constructed, a frequency increment is calculated by taking a frequency error and the frequency increment as state variables, frequency increment amplitude limiting and double-frequency minimum frequency interval constraint are introduced to update high and low frequency output frequencies, and a gain selection condition is given through a closed-loop difference equation. The terminal equipment executes a program stored in a storage medium through a processor to realize the method, and stable resonance tracking and settable control of the dual-frequency output frequency can be realized without a precise load model.