Abstract: A quantitative pooled-sample testing method and apparatus for chemical test items of consumer products are provided. The test method includes: calculating a maximum number of samples that can be pooled according to parameters such as regulatory limit requirements, measurement uncertainty, the number of pooled samples, a sample pooling ratio, and the like; establishing a searchable table according to a relationship between a qualified rate, the number of samples that can be pooled, and reduced workload; for various items to be tested, directly querying the table to acquire reduced workloads corresponding to different numbers of samples that can be pooled; and when the number of samples that can be pooled does not exceed a maximum value and corresponds to the most greatly reduced workload, determining that number of samples that can be pooled as an optimum number of samples that can be pooled, and performing pooled-sample testing.

Abstract: A plunger pump base and a plunger pump device. The plunger pump base includes a support assembly and an extension assembly. The support assembly includes a top plate, a bottom plate and a support frame, the top plate and the bottom plate are oppositely arranged at an interval, and the support frame is respectively fixed with the top plate and the bottom plate. The extension assembly includes an extension block, a first telescopic mechanism and a second telescopic mechanism. One end of the first telescopic mechanism is rotatably connected to the extension block, the other end of the first telescopic mechanism is rotatably connected to the top plate. One end of the second telescopic mechanism is rotatably connected to the extension block, and the other end of the second telescopic mechanism is rotatably connected to the bottom plate.

Abstract: This disclosure relates to GLP-1 agonists of Formula (I), including pharmaceutically acceptable salts and solvates thereof, and pharmaceutical compositions including the same.

Abstract: This disclosure relates to GLP-1 agonists of Formula (I): including pharmaceutically acceptable salts and solvates thereof, and pharmaceutical compositions including the same.

Abstract: The present disclosure discloses a shielded insulating shell and an electronic device. The shielded insulating shell includes a shell body provided with a first cavity, with an inner shielding layer near the first cavity and an outer shielding layer far away from the first cavity being formed on the shell body; a first structure formed on the first cavity, and formed by assembling to comprise at least a first shielding layer, a first insulating layer, a first air gap layer, a second insulating layer, and a second shielding layer arranged sequentially from an inner side to an outer side of the first cavity; and an assembling gap formed on the first structure, which cooperates with the first air gap layer to form a creepage path on the first structure that extends from the inner shielding layer to the outer shielding layer.

Abstract: The disclosure provides a compressing structure for compressing a component, a power module and a method for compressing a component inside a chamber, the compressing structure is provided for compressing a component onto a fixed plate and comprises a plate-shaped structure, the component is secured to a first side of the plate-shaped structure, the outside of the plate-shaped structure is provided with a base; at least a steering compressing member is provided between a second side of the plate-shaped structure and the base, and mounted on the second side of the plate-shaped structure or the base, the steering compressing member is provided for transforming an rotational motion into a translational motion; and at least a positioning device mounted on the side of the plate-shaped structure and the base. The compressing structure provided by the disclosure compresses the component onto the fixed plate.

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: The disclosure provides a power supply unit, including: a first high-frequency isolating converter including a first end connected to a first voltage, a second end and a third end; and a second high-frequency isolating converter including a first end connected to a second voltage, a second end and a third end, wherein the second end of the second high-frequency isolating converter and the second end of the first high-frequency isolating converter are connected in parallel to a first end of a first load, and the third end of the second high-frequency isolating converter and the third end of the first high-frequency isolating converter are connected in parallel to a second end of the first load. The disclosure further provides a loop power supply system having the power supply unit.

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 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: The present application provides a power supply apparatus, a three-phase power supply system and a control method, including N modules, where N is a positive integer greater than or equal to 2, and each module includes: a transformer, including a primary winding and a first secondary winding; and a first switch unit connected to the first secondary winding of the transformer, where primary windings of transformers of the N modules are connected in series, the first switch unit operates in one of a bypass mode, an open-circuit mode and a modulation mode, an output of each module is controlled by the first switch unit, so as to make the power supply apparatus provide voltages of different amplitudes according to power demand, and transformers with large volume and heavy weight, such as a centralized line frequency transformer or a multiple-winding transformer, are no longer required.

Abstract: The present disclosure provides a transformer including at least one magnetic core each having at least one window; one primary side winding passing through the at least one window, a wire forming the primary side winding being sequentially covered with a first solid insulating layer, a grounded shielding layer and a second solid insulating layer from inside to outside along a radial direction of the wire, the grounded shielding layer being connected to a reference ground; and at least one secondary side winding, each passing through the at least one window, the primary side winding having a first voltage with respect to the reference ground, the secondary side winding having a second voltage with respect to the reference ground, and the second voltage being greater than 50 times of the first voltage.

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: The disclosure provides a power supply unit, including: a first high-frequency isolating converter including a first end connected to a first voltage, a second end and a third end; and a second high-frequency isolating converter including a first end connected to a second voltage, a second end and a third end, wherein the second end of the second high-frequency isolating converter and the second end of the first high-frequency isolating converter are connected in parallel to a first end of a first load, and the third end of the second high-frequency isolating converter and the third end of the first high-frequency isolating converter are connected in parallel to a second end of the first load. The disclosure further provides a loop power supply system having the power supply unit.

Abstract: The present disclosure provides a circuit module and a solid-state transformer system. The circuit module includes: a first circuit unit outputting a first voltage; a second circuit unit outputting a second voltage, where the second voltage is less than the first voltage; and a shielding structure arranged between the first circuit unit and the second circuit unit, where the shielding structure includes: a first conductor layer electrically coupled to the first circuit unit, a second conductor layer electrically coupled to the second circuit unit, a third conductor layer located between the first conductor layer and the second conductor layer; a first insulation layer arranged between the first conductor layer and the third conductor layer; and a second insulation layer arranged between the second conductor layer and the third conductor layer.

Abstract: The present disclosure provides a power module and a solid-state transformer system. The power module includes: a circuit module, having a voltage level; and a cabin, configured to wrap the circuit module by bending or splicing, where the cabin has a shielding structure, the shielding structure including: a first conductor layer, located at a side close to the circuit module and equipotentially connected to the circuit module; a second conductor layer, arranged apart from the first conductor layer and located at a side away from the circuit module; and a solid insulating layer, provided between the first conductor layer and the second conductor layer for electrically isolating the first conductor layer and the second conductor layer. The power module provided by the present disclosure has good insulation performance and is easy to assemble.

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: A power module and a carrier board are disclosed. The carrier board includes a circuit board body and a prefabricated substrate. The circuit board body includes a wiring layer. The prefabricated substrate is embedded in the circuit board body and includes an insulation layer and a metal layer, the metal layer is disposed on the insulation layer. The insulation layer is formed by a ceramic material. The metal layer is connected to the insulation layer through a sintering process. A surface of the insulation layer , which has contact with the at least one metal layer, has at least a part exposed outside of the at least one metal layer, the part of the insulation layer exposed to the outside of the at least one metal layer is an outer edge portion, and the outer edge portion is extended into the circuit board body along a horizontal direction.

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: 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.