Abstract: A power converter and a method. When the voltage at the grid connection point exceeds the preset voltage range and an amplitude of a voltage output by the power conversion circuit is not greater than a voltage threshold, embodiments can control the amplitude of the current output by the power conversion circuit to be not greater than a second current threshold, where the second current threshold is greater than the first current threshold, and a ratio of an active current to a reactive current output by the power conversion circuit is constant or changes; or, when the amplitude of the voltage output by the power conversion circuit is greater than the voltage threshold, embodiments can control the amplitude of the current output by the power conversion circuit to be equal to the second current threshold, where the ratio of the active current to the reactive current changes.

Abstract: An islanding detection method includes: an alternating current frequency of an inverter is monitored. The alternating current frequency fluctuates within a preset range when in a normal mode. When an instantaneous shifting value of the alternating current frequency exceeds the preset range, a frequency detected before instantaneous shifting is a first frequency. When a frequency in first frequency data within a first preset time period is greater than or less than only the first frequency, an alternating current frequency detected when the first preset time period ends is a second frequency. Output power of the inverter is continuously adjusted based on a change in the current alternating current frequency. When a frequency in second frequency data within a second preset time period is greater than or less than only the second frequency, it may be indicated in time that islanding occurs in the inverter, and an islanding status is reported.

Abstract: A converter includes a chopper circuit, including a first resistor and a power switch connected in series; a current detection circuit, including: a first capacitor and an isolation circuit, where an input end of the isolation circuit is connected in series with the first capacitor, an input end of the current detection circuit is connected in parallel to one of the first resistor or the power switch, and the current detection circuit detects a direction of a current flowing through the first capacitor and outputs a current detection signal; a signal conditioning circuit, electrically connected to an output end of the current detection circuit, receiving the current detection signal and outputting a chopper circuit operating state signal; and a controller, electrically connected to the signal conditioning circuit, receiving the chopper circuit operating state signal and determining whether the chopper circuit is in a turned-on state or a turned-off state.

Abstract: The present application provides an insulation structure and an electronic device, where the insulation structure includes a first substrate, a first conductive body, and a first groove, the first substrate includes a first surface and a second surface oppositely disposed; the first conductive body is disposed on the first surface or second surface; the first groove is located on a same surface as the first conductive body and adjacent to the first conductive body; a surface of the first groove is provided with a first conductive layer, and the first conductive layer is electrically connected with the first conductive body. The insulation structure of the present application slows down the trend of potential line changes at the end of the first conductive body, reduces the electric field strength here, and improves the reliability of insulation.

Abstract: The invention discloses a method and device for detecting and locating insulation state of a conversion system, the conversion system including: a converter module including n conversion units, where n?2, each conversion unit including a transformer including a first winding and a second winding; and a connection element connected between the first winding and the second winding of the transformer; the method for detecting and locating insulation state including comparing a value reflecting a current flowing the connection element before change of the state of at least one switch with a value reflecting the current flowing the connection element after change of the state of the at least one switch, and determining which of the n conversion units has insulation abnormality based on comparison result.

Abstract: The disclosure provides a chain-link converter, comprising: a first node; a second node; and a plurality of switch submodules, wherein the plurality of switch submodules are connected in series, and the plurality of switch submodules are electrically connected between the first node and the second node, and a switching time of at least one switch submodule is greater than the switching time of other switch submodules. The chain-link converter of the disclosure effectively suppresses the common-mode current by extending the switching time of at least one switch submodule.

Abstract: A pharmaceutical composition for promoting a cancer immunotherapy and a method for promoting a cancer immunotherapy are provided. The pharmaceutical composition includes an uncoupling protein 2 inhibitor and an interleukin-17 blockade. The method includes administering an effective concentration of a pharmaceutical composition to a subject in need thereof, in which the pharmaceutical composition includes an uncoupling protein 2 inhibitor and an interleukin-17 blockade.

Abstract: A power conversion system, including a first module which includes a first switching circuit, a first auxiliary power supply unit, a first capacitor and a second capacitor, a second module which includes a second switching circuit, a second auxiliary power supply unit, a third capacitor and a fourth capacitor, and a first diode. The first switching circuit is in parallel with the second capacitor, the first auxiliary power supply unit is in parallel with the first capacitor, the first capacitor is connected to the first switching circuit; the second switching circuit is in parallel with the fourth capacitor, the second auxiliary power supply unit is in parallel with the third capacitor, the third capacitor is connected to the second switching circuit; and the first switching circuit is in series with the second switching circuit, and the first diode are connected to the first capacitor and the third capacitor.

Abstract: The present technology is directed to identifying and labeling a vehicle appendage. More specifically, the present technology is generally related to receiving one or more lidar points associated with a vehicle having an appendage and outputting a label to classify the vehicle and the appendage. In some examples, a first portion of the one or more lidar points associated with the vehicle having the appendage represents the vehicle and a second portion of the one or more lidar points associated with the vehicle having the appendage represents the appendage The present disclosure can further train a perception model to output the label to classify the vehicle and the appendage.

Abstract: A modular multilevel converter system, and a voltage detection method and an open-circuit fault diagnosis method thereof are disclosed. The modular multilevel converter system includes: N sub-modules sequentially cascaded, where N is an integer greater than or equal to 2, each of the sub-modules comprising at least one bridge arm and a capacitor connected in parallel to the bridge arm, the capacitor having a positive terminal and a negative terminal; and a voltage detection unit for detecting a voltage between at least two adjacent sub-modules in the N sub-modules, the voltage detection unit being connected between the positive terminal of the capacitor of the first sub-module and the negative terminal of the capacitor of the last sub-module in the at least two sub-modules.

Abstract: The application discloses an insulation detection method and apparatus for a conversion system, the conversion system including: a converter module including n conversion units, where n?1, each of the n conversion units including a transformer including a primary winding and a secondary winding; and a connection element connected between the primary winding and the secondary winding of the transformer; the insulation detection method including: controlling at least one switch of the converter module to turn on; detecting signals that reflect a current flowing through the connection element; and processing the signal and outputting insulation information, wherein the insulation information represents an insulation state of the conversion system.

Abstract: The present disclosure discloses a planar magnetic element and a manufacturing method thereof. The planar magnetic element includes: a housing, with an internal space; a core, accommodated in the internal space of the housing, and the core including at least one limb; at least one planar winding corresponding to the limb; and potting adhesive, filled in all air gaps in the internal space of the magnetic element, and blocking the clearance and creepage path between the planar winding and the core and/or between the two planar windings. The present disclosure may significantly reduce the volume of the magnetic element and greatly increase the partial discharge extinction voltage, thereby reducing the partial discharge risk of the magnetic element and improving the reliability. Moreover, the compact structure of the planar magnetic element is conducive to improving the power density of the module.

Abstract: The present application provides a backlight module and a display device. The backlight module includes multiple light-emitting units, at least one driving chip, and an adjustment module. In the driving chip, control units are used to control the respective corresponding light-emitting unit to emit light based on control signals. Each control unit has a feedback node. A signal acquisition unit is connected to the feedback nodes to collect feedback voltages of the feedback nodes. An adjustment module is connected to the at least one driving chip and is used to adjust light-emission brightness of the light-emitting units according to the feedback voltages.

Abstract: The invention provides a converter and a method for suppressing loop interference of converter. The converter includes first and second switching sets connected to each other. Each switching set includes a plurality of switching devices. The plurality of second switching devices are configured to be turned on for a first time after the turn-off time of the plurality of first switching devices, such that each of the plurality of second switching devices provides a path for current within the first time to reduce a potential difference between the first end of at least one of the plurality of second switching devices and the first end of the remaining of the plurality of second switching devices.

Abstract: The subject disclosure relates to techniques for improving performance of a machine learning algorithm that at least receives data descriptive of a 3-D object and provides an output, where the 3-D object occurs infrequently in a training dataset. A process of the disclosed technology can include determining that the machine learning algorithm performed below a threshold performance score when receiving data descriptive of the 3-D object in a real-world scene, wherein the 3-D object is classified as a first type of object, creating at least one 3-D representation of the first type of object for use in a simulation, modifying a plurality of simulated scenes to include the at least one 3-D representation of the first type of object, and training the machine learning algorithm with the modified simulated scenes, whereby the machine learning algorithm has greater exposure to the first type of object.

Abstract: An electrical system includes a first conduction terminal, a second conduction terminal, N power units and N supporting devices. The N power units are electrically connected between the first conduction terminal and the second conduction terminal in series, and N is an integer greater than or equal to 2. Each of the N supporting devices includes a conductive part and a support part. Each of the N power units is disposed on the corresponding conductive part. The conductive part is electrically connected with a power terminal of one of the N power units or electrically connected with a reference potential of the electrical system. The support part is connected between the corresponding conductive part and a ground potential.

Abstract: The present disclosure discloses a planar magnetic element and a manufacturing method thereof. The planar magnetic element includes: a housing, with an internal space; a core, accommodated in the internal space of the housing, and the core including at least one limb; at least one planar winding corresponding to the limb; and potting adhesive, filled in all air gaps in the internal space of the magnetic element, and blocking the clearance and creepage path between the planar winding and the core and/or between the two planar windings. The present disclosure may significantly reduce the volume of the magnetic element and greatly increase the partial discharge extinction voltage, thereby reducing the partial discharge risk of the magnetic element and improving the reliability. Moreover, the compact structure of the planar magnetic element is conducive to improving the power density of the module.

Abstract: A new variable selective etching technology for thick SOI devices. An SOI material is etched by the following steps: (1) providing an SOI wafer; (2) depositing a composite hard mask with a variable selection ratio to replace a traditional hard mask with an invariable selection ratio; (3) applying a photoresist; (4) mask making, namely defining a to-be-etched region by using a photoetching plate; (5) etching the photoresist in the defined region; (6) etching the composite hard mask; (7) removing the photoresist; (8) etching top silicon by using a second etching method at a first selection ratio; and (9) etching a buried oxide layer by using a third etching method at a second selection ratio. The new variable selective etching technology avoids the damage to a side wall of a deep trench when the buried oxide layer is etched, and does not need to use an excessive thick hard mask.

Abstract: The disclosure discloses a method and device for monitoring partial discharge. The monitoring method including: step a, connecting a monitoring circuit in parallel to both ends of a tested product, disposing a ground wire between the monitoring circuit and ground, disposing a first sensor in the monitoring circuit, and disposing a ground wire sensor on the ground wire; step b, applying an excitation signal to the tested product, acquiring a first signal through the first sensor and acquiring a ground wire signal through the ground wire sensor within a monitoring cycle; and step c, determining whether the tested product has partial discharge through the first signal and the ground wire signal. The disclosure can avoid the partial discharge monitoring device from wrongly determining an interference signal to be a partial discharge signal, enhance anti-interference capability of the partial discharge monitoring device, and improve monitoring accuracy.

Abstract: A touch circuit includes: a touch IC; a first pull-up sub-circuit; a second pull-up sub-circuit; a first switching sub-circuit configured to transmit a signal from a data signal input terminal to a data signal port under control of a signal from a first signal input terminal; and a second switching sub-circuit configured to transmit a signal from a clock signal input terminal to a clock signal port under control of the signal from the first signal input terminal. The signal from the data signal input terminal is transmitted to the first switching sub-circuit earlier than the signal from the first signal input terminal, and the signal from the clock signal input terminal is transmitted to the second switching sub-circuit earlier than the signal from the first signal input terminal.