Abstract: The present invention provides a driving device and a control method. The driving device is configured to drive a power switch and includes a power supply, a first bridge arm coupled to the power supply, a second bridge arm coupled in parallel to the first bridge arm, and a resonant inductor. The first bridge arm includes a first switch and a second switch connected to a first midpoint, the second bridge arm comprises a first semiconductor element and a second semiconductor element connected to a second midpoint, and the resonant inductor is coupled between the first midpoint and the second midpoint. The control method includes turning on the first switch for a first period such that the power supply charges a gate electrode of the power switch; and in response to a decrease of a current of the resonant inductor to a first threshold value, turning on the first switch again for a second period such that a potential of the first midpoint is equal to a potential of the second midpoint.

Abstract: An insulation device includes an insulating part, and at least one conductive part located on at least one surface of the insulating part, wherein the at least one surface of the insulating part facing the at least one conductive part has central concave shape. A longitudinal section of the at least one conductive part includes a straight portion in the middle and two curved portions extending outwardly from both ends of the straight portion. The curved portions satisfy: { x = A ? ( ? + 1 2 ? ( e ( ? + i ? ? ) + e ( ? - i ? ? ) ) ) y = A ? ( ? + 1 2 ? i ? ( e ( ? + i ? ? ) - e ( ? - i ? ? ) ) ) ? .

Abstract: A power module is disclosed. The power module includes a carrier board, two switches, at least one metal block, a clamping component and a metal conductive component. The carrier board includes an upper surface and a lower surface. The two switches are disposed on the upper surface and connected in series to form a bridge arm electrically connected between a positive terminal and a negative terminal. The metal block is electrically connected to the two switches. The clamping component is disposed on the upper surface and electrically connected in parallel with the bridge arm through the carrier board. The metal conductive component is connected from a common node of the two switches to an output terminal. The metal conductive component is located at a side of the two switches facing away from the upper surface.

Abstract: The invention discloses a power module and a power conversion device. The power module includes a primary converting unit including a first active device unit; a secondary converting unit including a second active device unit; a transformer including a primary unit connected to the primary converting unit and a secondary unit connected to the secondary converting unit; a first heat dissipating unit on which the primary unit and the first active device unit are disposed; a second heat dissipating unit on which the secondary unit and the second active device unit are disposed; and an insulating plate including an insulating plate body and a semi-conducting layer disposed on a surface of the insulating plate body.

Abstract: A power conversion system includes N power converters. Each power converter includes an input terminal, a first output terminal and a second output terminal. Each of the N power converters receives a DC power through the input terminal. The first output terminal of a first power converter and the second output terminal of an N-th power converter are connected in parallel to form an N-th total output terminal. The first output terminal of an i-th power converter and the second output terminal of an (i?1)-th power converter are connected in parallel to form an (i?1)-th total output terminal. The two input terminals of the load are connected with two total output terminals of N total output terminals. A (2k?1)-th power converter is connected with a first power source. A 2k-th power converter is connected with a second power source. The redundancy of the power conversion system can be achieved.

Abstract: Disclosed is a power supply system, including: a high-voltage input power distribution cabinet, a high-low voltage conversion cabinet, and a low-voltage output and control cabinet, the high-low voltage conversion cabinet is provided with at least one high-voltage chamber provided with a high-voltage bus bar, at least one low-voltage chamber provided with a low-voltage bus bar, an insulating partition between the high-voltage chamber and the low-voltage chamber and a plurality of power supply modules; each of the power supply modules bridges the high-voltage and low-voltage chambers and includes a high-voltage cavity, a low-voltage cavity and an isolation unit, connecting terminals of the high-voltage and low-voltage cavities are respectively disposed corresponding to the high-voltage and low-voltage chambers and electrically connected to the high-voltage and low-voltage bus bars respectively, and the isolation unit is connected to one end of the high-voltage cavity and one end of the low-voltage cavity.

Abstract: The present disclosure provides a remote sensing-based detection system for gaseous pollutant from diesel vehicle exhaust, including: a diesel vehicle exhaust emission measuring device, a main control computer, an information display device, a vehicle driving status monitoring device, a weather monitoring device and a vehicle license plate recognizing device; where the diesel vehicle exhaust emission measuring device, the information display device, the vehicle driving status monitoring device, the weather monitoring device and the vehicle license plate recognizing device are in communication connection with the main control computer, the main control computer is connected to a motor vehicle emission monitoring platform via internet, and the vehicle driving status monitoring device includes a speedometer, an accelerometer or a radar speedometer.

Abstract: The present invention provides the preparation processes for several crystal forms of the compound 17beta-Neriifolin (17bNF) and use thereof in anti-tumor applications. The present invention provides preparation processes for four kinds of non-solvated crystal forms, amorphous powders and eleven kinds of solvated crystalline solids, including ethanol-solvated ones, of 17bNF that are not present in nature, and the identification and characterization of these crystal forms by crystallographic research methods such as X-ray powder diffraction. In addition, through vivo anti-tumor experiments with five of the crystal forms in nude mice, we provide anti-tumor and anti-cancer applications of the crystal forms of 17bNF.

Abstract: A power module is disclosed. The power module includes a carrier board, two switches, at least one metal block, a clamping component and a metal conductive component. The carrier board includes an upper surface and a lower surface. The two switches are disposed on the upper surface and connected in series to form a bridge arm electrically connected between a positive terminal and a negative terminal. The metal block is electrically connected to the two switches. The clamping component is disposed on the upper surface and electrically connected in parallel with the bridge arm through the carrier board. The metal conductive component is connected from a common node of the two switches to an output terminal. The metal conductive component is located at a side of the two switches facing away from the upper surface.

Abstract: A holder with a counterweight structure and for mounting on an antenna comprises a fixing seat, a rotating seat, a rotor, two plug caps, a connecting piece and a weight part; wherein the fixing seat is formed with a rotor mounting portion; the rotor mounting portion includes two rotor mounting holes extending in a rotational axis direction at both ends thereof, a cavity into which a counterweight is placed, and a counterweight cover for covering a cavity opening; the rotor mounting hole is formed with a hexagonal connecting post disposed at an inner bottom surface thereof and extending in the rotational axis direction; the hexagonal connecting post has an annular limiting boss; wherein the rotating seat includes two rotor sleeves disposed symmetrically with each other; the rotor mounting portion coincides with the axis of rotation of the two rotor sleeves and is connected therebetween.

Abstract: The present disclosure provides a remote sensing-based detection system for gaseous pollutant from diesel vehicle exhaust, including: a diesel vehicle exhaust emission measuring device, a main control computer, an information display device, a vehicle driving status monitoring device, a weather monitoring device and a vehicle license plate recognizing device; where the diesel vehicle exhaust emission measuring device, the information display device, the vehicle driving status monitoring device, the weather monitoring device and the vehicle license plate recognizing device are in communication connection with the main control computer, the main control computer is connected to a motor vehicle emission monitoring platform via internet, and the vehicle driving status monitoring device includes a speedometer, an accelerometer or a radar speedometer.

Abstract: The present disclosure relates to the field of power electronics, and proposes a power conversion system, including a power cabinet, a first divider and a plurality of power modules. The power cabinet includes a first high voltage compartment and a first low voltage compartment. The first divider is arranged in the power cabinet, and extends along a height direction of the power cabinet to separate the first high voltage compartment and the first low voltage compartment. The plurality of power modules are arranged in the power cabinet, each power module includes a high voltage input terminal and a low voltage output terminal; the high voltage input terminal is arranged in the first high voltage compartment, and the low voltage output terminal is arranged in the first low voltage compartment.

Abstract: The present disclosure relates to the field of power electronics technology, and proposes a power module, including: a case and an isolating part disposed in the case; a first air duct and a second air duct stacked to each other, separated by the isolating part, and penetrated in a front-to-rear direction in the case; a high-voltage power unit; a low-voltage power unit; and a transformer, including a high-voltage portion and a low-voltage portion, wherein the high-voltage portion includes a first magnetic core and a high-voltage coil disposed on the first magnetic core, and the low-voltage portion includes a second magnetic core and a low-voltage coil disposed on the second magnetic core, wherein the high-voltage power unit and the high-voltage portion are disposed in the first air duct, and the low-voltage power unit and the low-voltage portion are disposed in the second air duct.

Abstract: A power conversion system comprises a plurality of power modules, each including a power input end; a charging input end; a power output end; at least one power conversion unit, each including an AC/DC conversion unit and at least one DC-Bus capacitor and being connected to the power input end and the power output end; and a pre-charging unit connected to the charging input end for receiving direct current and connected to the DC-Bus capacitor. The pre-charging unit starts to charge the DC-Bus capacitor of one of the power modules when said power module breaks down or the load of the power conversion system is light so that no current flows through the AC/DC conversion unit. The power input ends of the power modules are connected in series and then connected to an AC power source, and the power output ends of the power modules are connected in parallel.

Abstract: An insulated housing, in a cylindrical structure, includes an inner metal layer, an insulating layer and an outer metal coating. The insulating layer is positioned between the inner metal layer and the outer metal coating. In any end of the cylindrical structure, both a distance from the end of the inner metal layer to the end of the cylindrical structure and a distance from the end of the outer metal coating to the end of the cylindrical structure are not equal to zero, and the distance from the end of the inner metal layer to the end of the cylindrical structure is larger than the distance from an end of the outer metal coating to the end of the cylindrical structure. The inner metal layer is composed of one first metal cylinder and two second metal cylinders respectively disposed on the both ends of the first metal cylinder.

Abstract: Embodiments of the present disclosure provide an insulation monitoring device applied to a power system and a power system. The power system includes at least one power electronic converter module. The insulation monitoring device includes an insulation component, a signal source, an impedance module, and a monitoring module. The insulation component at least partially wraps around the power electronic converter module. The signal source is electrically coupled to a circuit node in the power electronic converter module, the impedance module is connected between the signal source and the insulation component, and the monitoring module is configured to monitor an insulation resistance value of the insulation component, so that an insulation state of the power electronic converter module may be determined.

Abstract: Disclosed is a power supply system, including: a high-voltage input power distribution cabinet, a high-low voltage conversion cabinet, and a low-voltage output and control cabinet, the high-low voltage conversion cabinet is provided with at least one high-voltage chamber provided with a high-voltage bus bar, at least one low-voltage chamber provided with a low-voltage bus bar, an insulating partition between the high-voltage chamber and the low-voltage chamber and a plurality of power supply modules; each of the power supply modules bridges the high-voltage and low-voltage chambers and includes a high-voltage cavity, a low-voltage cavity and an isolation unit, connecting terminals of the high-voltage and low-voltage cavities are respectively disposed corresponding to the high-voltage and low-voltage chambers and electrically connected to the high-voltage and low-voltage bus bars respectively, and the isolation unit is connected to one end of the high-voltage cavity and one end of the low-voltage cavity.

Abstract: The present invention discloses a power conversion system and a method for pre-charging DC-Bus capacitors therein. The power conversion system comprises a plurality of power modules, each including a power input end; a charging input end; a power output end; at least one power conversion unit, each of the power conversion unit including at least one DC-Bus capacitor and being electrically connected to the power input end and the power output end; and a pre-charging unit electrically connected to the charging input end for receiving direct current and electrically connected to the DC-Bus capacitor for pre-charging the DC-Bus capacitor. The power input ends of the plurality of power modules are connected in series and then electrically connected to an AC power source, and the power output ends of the plurality of power modules are connected in parallel.

Abstract: Disclosed is a power supply system, including: a high-voltage input power distribution cabinet, a high-low voltage conversion cabinet, and a low-voltage output and control cabinet, the high-low voltage conversion cabinet is provided with at least one high-voltage chamber provided with a high-voltage bus bar, at least one low-voltage chamber provided with a low-voltage bus bar, an insulating partition between the high-voltage chamber and the low-voltage chamber and a plurality of power supply modules; each of the power supply modules bridges the high-voltage and low-voltage chambers and includes a high-voltage cavity, a low-voltage cavity and an isolation unit, the high-voltage and low-voltage cavities are respectively disposed corresponding to the high-voltage and low-voltage chambers and electrically connected to the high-voltage and low-voltage bus bars respectively, and the isolation unit is connected to one end of the high-voltage cavity and one end of the low-voltage cavity.

Abstract: The present invention provides the preparation processes for several crystal forms of the compound 17beta-Neriifolin (17bNF) and use thereof in anti-tumor applications. The present invention provides preparation processes for four kinds of non-solvated crystal forms, amorphous powders and eleven kinds of solvated crystalline solids, including ethanol-solvated ones, of 17bNF that are not present in nature, and the identification and characterization of these crystal forms by crystallographic research methods such as X-ray powder diffraction. In addition, through vivo anti-tumor experiments with five of the crystal forms in nude mice, we provide anti-tumor and anti-cancer applications of the crystal forms of 17bNF.