Abstract: A smart power hub has an AC port, a first DC port to a car battery, a second DC port to DC devices such as car instruments, and a third DC port to solar panels or another smart power hub. An AC bi-directional converter has six transistors in a B6 configuration to convert three-phase AC, acting as an interleaved totem-pole Power-Factor-Corrector for one-phase AC. A switch connects the DC bi-directional converter with either the AC bi-directional converter or the solar panels on the third DC port. A link capacitor has a DC link voltage that rises during battery charging. A DC bi-directional converter has a transformer, a primary bridge connected to the DC link voltage, and a secondary bridge of transistors connected to the first DC port. Auxiliary windings in the transformer drive a rectifier to the second DC port to power on-board DC devices. Solar DC charges the battery without AC conversion.

Abstract: The invention relates to a crucible for crystal growth and a method for releasing thermal stress of silicon carbide crystals. The crucible is a crucible in contact with the side surface of the prepared crystals, and the crucible has an annular non-closed splicing structure. The crucible for the crystal growth has the annular non-closed splicing structure, so that the crystals can be prevented from being hooped, hot stress concentrated in the crystals in the growth process of the crystals can be effectively released, the fracturing rate of the crystals can be reduced, and the finished product rate of the crystals can be increased.

Abstract: Embodiments of the disclosure disclose a method and apparatus for displaying information. The method comprises: acquiring to-be-displayed information; generating a URL of a target page, the target page including a hyperlink linking to a display page of the to-be-displayed information; sending the URL to a first terminal device, the first terminal device used for generating and displaying a QR code of the URL; determining, in response to receiving an information display request sent by a second terminal device for characterizing the second terminal device recognizing the QR code, whether the information display request meets a preset condition; and sending a page display instruction to the second terminal device, in response to determining the information display request meeting the preset condition, wherein the second terminal device displays the target page in response to receiving the page display instruction and displays the to-be-displayed information in response to the hyperlink being clicked.

Abstract: Embodiments of the disclosure disclose a method and apparatus for displaying information. The method comprises: acquiring to-be-displayed information; generating a URL of a target page, the target page including a hyperlink linking to a display page of the to-be-displayed information; sending the URL to a first terminal device, the first terminal device used for generating and displaying a QR code of the URL; determining, in response to receiving an information display request sent by a second terminal device for characterizing the second terminal device recognizing the QR code, whether the information display request meets a preset condition; and sending a page display instruction to the second terminal device, in response to determining the information display request meeting the preset condition, wherein the second terminal device displays the target page in response to receiving the page display instruction and displays the to-be-displayed information in response to the hyperlink being clicked.

Abstract: AC to DC power electronic converter circuitry includes isolated converter circuitry and control circuitry coupled to the isolated converter circuitry. The isolated converter circuitry includes one or more wide bandgap switching components. The control circuitry is configured to drive at least one of the wide bandgap switching components such that the power electronic converter circuitry is configured to generate a DC output with an output power greater than 100W at an efficiency greater than 92%. Using wide bandgap components in the isolated converter circuitry allows the power electronic converter circuitry to achieve a high efficiency and high power density.

Abstract: A power conversion apparatus and individual components thereof is described. In general, the power conversion apparatus converts a DC output received from an appropriate source, such as string of solar panels, to an AC output. The AC output may be a single-phase or three-phase, sinusoidal AC signal. The inverter system may include a boost converter, which is a DC-to-DC converter, and an inverter, which is essentially a DC-AC converter. In operation, the boost converter will boost the DC output from the appropriate source to a desired DC output voltage. The inverter will convert the DC output voltage to a desired single-phase or three-phase output voltage at a desired frequency, such as 50 or 60 hertz. The boost converter and the inverter may be packaged together in an appropriate sealed and weatherproof housing.

Abstract: Disclosed is a DC-DC converter with a converter bridge, tank circuitry, and rectifier circuitry. In one embodiment, the converter bridge includes multiple switch circuits, which are formed with silicon carbide MOSFETs (metal on semiconductor field effect transistors), and are configured to provide a primary current. The tank circuitry includes a resonant capacitance, a resonant inductance, and a transformer with a primary, a first secondary, and a second secondary. The tank circuitry is configured to receive the primary current, and the transformer is associated with a magnetizing inductance. The resonant frequency of the tank circuitry is greater than about 225 kilohertz as essentially defined by the magnetizing inductance, the resonant capacitance, and the resonant inductance. The rectifier circuitry is coupled to the first secondary and the second secondary coil, and is adapted to provide a rectified output current.

Abstract: AC to DC power electronic converter circuitry includes isolated converter circuitry and control circuitry coupled to the isolated converter circuitry. The isolated converter circuitry includes one or more wide bandgap switching components. The control circuitry is configured to drive at least one of the wide bandgap switching components such that the power electronic converter circuitry is configured to generate a DC output with an output power greater than 100W at an efficiency greater than 92%. Using wide bandgap components in the isolated converter circuitry allows the power electronic converter circuitry to achieve a high efficiency and high power density.

Abstract: Disclosed is a DC-DC converter with a converter bridge, tank circuitry, and rectifier circuitry. In one embodiment, the converter bridge includes multiple switch circuits, which are formed with silicon carbide MOSFETs (metal on semiconductor field effect transistors), and are configured to provide a primary current. The tank circuitry includes a resonant capacitance, a resonant inductance, and a transformer with a primary, a first secondary, and a second secondary. The tank circuitry is configured to receive the primary current, and the transformer is associated with a magnetizing inductance. The resonant frequency of the tank circuitry is greater than about 225 kilohertz as essentially defined by the magnetizing inductance, the resonant capacitance, and the resonant inductance. The rectifier circuitry is coupled to the first secondary and the second secondary coil, and is adapted to provide a rectified output current.

Abstract: A power conversion apparatus and individual components thereof is described. In general, the power conversion apparatus converts a DC output received from an appropriate source, such as string of solar panels, to an AC output. The AC output may be a single-phase or three-phase, sinusoidal AC signal. The inverter system may include a boost converter, which is a DC-to-DC converter, and an inverter, which is essentially a DC-AC converter. In operation, the boost converter will boost the DC output from the appropriate source to a desired DC output voltage. The inverter will convert the DC output voltage to a desired single-phase or three-phase output voltage at a desired frequency, such as 50 or 60 hertz. The boost converter and the inverter may be packaged together in an appropriate sealed and weatherproof housing.